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libxc domain builder rewrite, core bits.

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Signed-off-by: Gerd Hoffmann <kraxel@suse.de>
---
 tools/libxc/Makefile           |   14
 tools/libxc/xc_dom.h           |  261 +++++++++++++
 tools/libxc/xc_dom_binloader.c |  294 +++++++++++++++
 tools/libxc/xc_dom_boot.c      |  515 +++++++++++++++++++++++++++
 tools/libxc/xc_dom_core.c      |  773 +++++++++++++++++++++++++++++++++++++++++
 tools/libxc/xc_dom_elfloader.c |  283 +++++++++++++++
 tools/libxc/xc_dom_ia64.c      |  118 ++++++
 tools/libxc/xc_dom_powerpc64.c |  100 +++++
 tools/libxc/xc_dom_x86.c       |  559 +++++++++++++++++++++++++++++
 9 files changed, 2917 insertions(+)
This commit is contained in:
Emmanuel Ackaouy committed 2007-01-25 22:16:52 +00:00
1 parent a62512128b
commit b4feb14b3d
9 files changed
+2917
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tools/libxc/Makefile
+14
View File
@@ -45,6 +45,20 @@ $(LIBELF_SRCS) libelf-private.h:
# add libelf bits to libxc
GUEST_SRCS-y += $(LIBELF_SRCS)
# new domain builder
GUEST_SRCS-y += xc_dom_core.c xc_dom_boot.c
GUEST_SRCS-y += xc_dom_elfloader.c
GUEST_SRCS-y += xc_dom_binloader.c
ifeq ($(CONFIG_POWERPC),y)
# big endian boxes
GUEST_SRCS-y += xc_dom_powerpc64.c
else
# little endian boxes
GUEST_SRCS-y += xc_dom_x86.c
GUEST_SRCS-y += xc_dom_ia64.c
endif
-include $(XEN_TARGET_ARCH)/Makefile
CFLAGS += -Werror -Wmissing-prototypes
tools/libxc/xc_dom.h
+261
View File
@@ -0,0 +1,261 @@
#include <xen/libelf.h>
#define INVALID_P2M_ENTRY ((xen_pfn_t)-1)
/* --- typedefs and structs ---------------------------------------- */
typedef uint64_t xen_vaddr_t;
typedef uint64_t xen_paddr_t;
/* FIXME: temporary hack ... */
#ifndef PRIpfn
#define PRIpfn "lx"
#endif
struct xc_dom_seg {
xen_vaddr_t vstart;
xen_vaddr_t vend;
xen_pfn_t pfn;
};
struct xc_dom_mem {
struct xc_dom_mem *next;
void *mmap_ptr;
size_t mmap_len;
unsigned char memory[0];
};
struct xc_dom_phys {
struct xc_dom_phys *next;
void *ptr;
xen_pfn_t first;
xen_pfn_t count;
};
struct xc_dom_image {
/* files */
void *kernel_blob;
size_t kernel_size;
void *ramdisk_blob;
size_t ramdisk_size;
/* arguments and parameters */
char *cmdline;
uint32_t f_requested[XENFEAT_NR_SUBMAPS];
/* info from (elf) kernel image */
struct elf_dom_parms parms;
char *guest_type;
/* memory layout */
struct xc_dom_seg kernel_seg;
struct xc_dom_seg ramdisk_seg;
struct xc_dom_seg p2m_seg;
struct xc_dom_seg pgtables_seg;
xen_pfn_t start_info_pfn;
xen_pfn_t console_pfn;
xen_pfn_t xenstore_pfn;
xen_pfn_t shared_info_pfn;
xen_pfn_t bootstack_pfn;
xen_vaddr_t virt_alloc_end;
xen_vaddr_t bsd_symtab_start;
/* initial page tables */
unsigned int pgtables;
unsigned int pg_l4;
unsigned int pg_l3;
unsigned int pg_l2;
unsigned int pg_l1;
unsigned int alloc_bootstack;
unsigned int extra_pages;
xen_vaddr_t virt_pgtab_end;
/* other state info */
uint32_t f_active[XENFEAT_NR_SUBMAPS];
xen_pfn_t *p2m_host;
void *p2m_guest;
/* physical memory */
xen_pfn_t total_pages;
struct xc_dom_phys *phys_pages;
/* malloc memory pool */
struct xc_dom_mem *memblocks;
/* memory footprint stats */
size_t alloc_malloc;
size_t alloc_mem_map;
size_t alloc_file_map;
size_t alloc_domU_map;
/* misc xen domain config stuff */
unsigned long flags;
unsigned int console_evtchn;
unsigned int xenstore_evtchn;
xen_pfn_t shared_info_mfn;
int guest_xc;
domid_t guest_domid;
int shadow_enabled;
int xen_version;
xen_capabilities_info_t xen_caps;
/* kernel loader, arch hooks */
struct xc_dom_loader *kernel_loader;
void *private_loader;
/* kernel loader */
struct xc_dom_arch *arch_hooks;
};
/* --- pluggable kernel loader ------------------------------------- */
struct xc_dom_loader {
char *name;
int (*probe) (struct xc_dom_image * dom);
int (*parser) (struct xc_dom_image * dom);
int (*loader) (struct xc_dom_image * dom);
struct xc_dom_loader *next;
};
#define __init __attribute__ ((constructor))
void xc_dom_register_loader(struct xc_dom_loader *loader);
/* --- arch specific hooks ----------------------------------------- */
struct xc_dom_arch {
/* pagetable setup */
int (*alloc_magic_pages) (struct xc_dom_image * dom);
int (*count_pgtables) (struct xc_dom_image * dom);
int (*setup_pgtables) (struct xc_dom_image * dom);
/* arch-specific data structs setup */
int (*start_info) (struct xc_dom_image * dom);
int (*shared_info) (struct xc_dom_image * dom, void *shared_info);
int (*vcpu) (struct xc_dom_image * dom, void *vcpu_ctxt);
char *guest_type;
int page_shift;
int sizeof_pfn;
struct xc_dom_arch *next;
};
void xc_dom_register_arch_hooks(struct xc_dom_arch *hooks);
#define XC_DOM_PAGE_SHIFT(dom) ((dom)->arch_hooks->page_shift)
#define XC_DOM_PAGE_SIZE(dom) (1 << (dom)->arch_hooks->page_shift)
/* --- main functions ---------------------------------------------- */
struct xc_dom_image *xc_dom_allocate(const char *cmdline, const char *features);
void xc_dom_release_phys(struct xc_dom_image *dom);
void xc_dom_release(struct xc_dom_image *dom);
int xc_dom_mem_init(struct xc_dom_image *dom, unsigned int mem_mb);
size_t xc_dom_check_gzip(void *blob, size_t ziplen);
int xc_dom_do_gunzip(void *src, size_t srclen, void *dst, size_t dstlen);
int xc_dom_try_gunzip(struct xc_dom_image *dom, void **blob, size_t * size);
int xc_dom_kernel_file(struct xc_dom_image *dom, const char *filename);
int xc_dom_ramdisk_file(struct xc_dom_image *dom, const char *filename);
int xc_dom_kernel_mem(struct xc_dom_image *dom, const void *mem,
size_t memsize);
int xc_dom_ramdisk_mem(struct xc_dom_image *dom, const void *mem,
size_t memsize);
int xc_dom_parse_image(struct xc_dom_image *dom);
int xc_dom_build_image(struct xc_dom_image *dom);
int xc_dom_update_guest_p2m(struct xc_dom_image *dom);
int xc_dom_boot_xen_init(struct xc_dom_image *dom, int xc, domid_t domid);
int xc_dom_boot_mem_init(struct xc_dom_image *dom);
void *xc_dom_boot_domU_map(struct xc_dom_image *dom, xen_pfn_t pfn,
xen_pfn_t count);
int xc_dom_boot_image(struct xc_dom_image *dom);
int xc_dom_compat_check(struct xc_dom_image *dom);
/* --- debugging bits ---------------------------------------------- */
extern FILE *xc_dom_logfile;
void xc_dom_loginit(void);
int xc_dom_printf(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
int xc_dom_panic_func(const char *file, int line, xc_error_code err,
const char *fmt, ...)
__attribute__ ((format(printf, 4, 5)));
#define xc_dom_panic(err, fmt, args...) \
xc_dom_panic_func(__FILE__, __LINE__, err, fmt, ## args)
#define xc_dom_trace(mark) \
xc_dom_printf("%s:%d: trace %s\n", __FILE__, __LINE__, mark)
void xc_dom_log_memory_footprint(struct xc_dom_image *dom);
/* --- simple memory pool ------------------------------------------ */
void *xc_dom_malloc(struct xc_dom_image *dom, size_t size);
void *xc_dom_malloc_page_aligned(struct xc_dom_image *dom, size_t size);
void *xc_dom_malloc_filemap(struct xc_dom_image *dom,
const char *filename, size_t * size);
char *xc_dom_strdup(struct xc_dom_image *dom, const char *str);
/* --- alloc memory pool ------------------------------------------- */
int xc_dom_alloc_page(struct xc_dom_image *dom, char *name);
int xc_dom_alloc_segment(struct xc_dom_image *dom,
struct xc_dom_seg *seg, char *name,
xen_vaddr_t start, xen_vaddr_t size);
/* --- misc bits --------------------------------------------------- */
void *xc_dom_pfn_to_ptr(struct xc_dom_image *dom, xen_pfn_t first,
xen_pfn_t count);
void xc_dom_unmap_one(struct xc_dom_image *dom, xen_pfn_t pfn);
void xc_dom_unmap_all(struct xc_dom_image *dom);
static inline void *xc_dom_seg_to_ptr(struct xc_dom_image *dom,
struct xc_dom_seg *seg)
{
xen_vaddr_t segsize = seg->vend - seg->vstart;
unsigned int page_size = XC_DOM_PAGE_SIZE(dom);
xen_pfn_t pages = (segsize + page_size - 1) / page_size;
return xc_dom_pfn_to_ptr(dom, seg->pfn, pages);
}
static inline void *xc_dom_vaddr_to_ptr(struct xc_dom_image *dom,
xen_vaddr_t vaddr)
{
unsigned int page_size = XC_DOM_PAGE_SIZE(dom);
xen_pfn_t page = (vaddr - dom->parms.virt_base) / page_size;
unsigned int offset = (vaddr - dom->parms.virt_base) % page_size;
void *ptr = xc_dom_pfn_to_ptr(dom, page, 0);
if (!ptr)
return NULL;
return ptr + offset;
}
static inline int xc_dom_feature_translated(struct xc_dom_image *dom)
{
return elf_xen_feature_get(XENFEAT_auto_translated_physmap, dom->f_active);
}
static inline xen_pfn_t xc_dom_p2m_host(struct xc_dom_image *dom, xen_pfn_t pfn)
{
if (dom->shadow_enabled)
return pfn;
return dom->p2m_host[pfn];
}
static inline xen_pfn_t xc_dom_p2m_guest(struct xc_dom_image *dom,
xen_pfn_t pfn)
{
if (xc_dom_feature_translated(dom))
return pfn;
return dom->p2m_host[pfn];
}
/* --- arch bits --------------------------------------------------- */
tools/libxc/xc_dom_binloader.c
+294
View File
@@ -0,0 +1,294 @@
/******************************************************************************
*
* Loads simple binary images. It's like a .COM file in MS-DOS. No headers are
* present. The only requirement is that it must have a xen_bin_image table
* somewhere in the first 8192 bytes, starting on a 32-bit aligned address.
* Those familiar with the multiboot specification should recognize this, it's
* (almost) the same as the multiboot header.
* The layout of the xen_bin_image table is:
*
* Offset Type Name Note
* 0 uint32_t magic required
* 4 uint32_t flags required
* 8 uint32_t checksum required
* 12 uint32_t header_addr required
* 16 uint32_t load_addr required
* 20 uint32_t load_end_addr required
* 24 uint32_t bss_end_addr required
* 28 uint32_t entry_addr required
*
* - magic
* Magic number identifying the table. For images to be loaded by Xen 3, the
* magic value is 0x336ec578 ("xEn3" with the 0x80 bit of the "E" set).
* - flags
* bit 0: indicates whether the image needs to be loaded on a page boundary
* bit 1: reserved, must be 0 (the multiboot spec uses this bit to indicate
* that memory info should be passed to the image)
* bit 2: reserved, must be 0 (the multiboot spec uses this bit to indicate
* that the bootloader should pass video mode info to the image)
* bit 16: reserved, must be 1 (the multiboot spec uses this bit to indicate
* that the values in the fields header_addr - entry_addr are
* valid)
* All other bits should be set to 0.
* - checksum
* When added to "magic" and "flags", the resulting value should be 0.
* - header_addr
* Contains the virtual address corresponding to the beginning of the
* table - the memory location at which the magic value is supposed to be
* loaded. This field serves to synchronize the mapping between OS image
* offsets and virtual memory addresses.
* - load_addr
* Contains the virtual address of the beginning of the text segment. The
* offset in the OS image file at which to start loading is defined by the
* offset at which the table was found, minus (header addr - load addr).
* load addr must be less than or equal to header addr.
* - load_end_addr
* Contains the virtual address of the end of the data segment.
* (load_end_addr - load_addr) specifies how much data to load. This implies
* that the text and data segments must be consecutive in the OS image. If
* this field is zero, the domain builder assumes that the text and data
* segments occupy the whole OS image file.
* - bss_end_addr
* Contains the virtual address of the end of the bss segment. The domain
* builder initializes this area to zero, and reserves the memory it occupies
* to avoid placing boot modules and other data relevant to the loaded image
* in that area. If this field is zero, the domain builder assumes that no bss
* segment is present.
* - entry_addr
* The virtual address at which to start execution of the loaded image.
*
* Some of the field descriptions were copied from "The Multiboot
* Specification", Copyright 1995, 96 Bryan Ford <baford@cs.utah.edu>,
* Erich Stefan Boleyn <erich@uruk.org> Copyright 1999, 2000, 2001, 2002
* Free Software Foundation, Inc.
*/
#include <stdlib.h>
#include <inttypes.h>
#include "xg_private.h"
#include "xc_dom.h"
#define round_pgup(_p) (((_p)+(PAGE_SIZE_X86-1))&PAGE_MASK_X86)
#define round_pgdown(_p) ((_p)&PAGE_MASK_X86)
struct xen_bin_image_table
{
uint32_t magic;
uint32_t flags;
uint32_t checksum;
uint32_t header_addr;
uint32_t load_addr;
uint32_t load_end_addr;
uint32_t bss_end_addr;
uint32_t entry_addr;
};
#define XEN_MULTIBOOT_MAGIC3 0x336ec578
#define XEN_MULTIBOOT_FLAG_ALIGN4K 0x00000001
#define XEN_MULTIBOOT_FLAG_NEEDMEMINFO 0x00000002
#define XEN_MULTIBOOT_FLAG_NEEDVIDINFO 0x00000004
#define XEN_MULTIBOOT_FLAG_ADDRSVALID 0x00010000
#define XEN_MULTIBOOT_FLAG_PAE_SHIFT 14
#define XEN_MULTIBOOT_FLAG_PAE_MASK (3 << XEN_MULTIBOOT_FLAG_PAE_SHIFT)
/* Flags we test for */
#define FLAGS_MASK ((~ 0) & (~ XEN_MULTIBOOT_FLAG_ALIGN4K) & \
(~ XEN_MULTIBOOT_FLAG_PAE_MASK))
#define FLAGS_REQUIRED XEN_MULTIBOOT_FLAG_ADDRSVALID
/* --------------------------------------------------------------------- */
static struct xen_bin_image_table *find_table(struct xc_dom_image *dom)
{
struct xen_bin_image_table *table;
uint32_t *probe_ptr;
uint32_t *probe_end;
probe_ptr = dom->kernel_blob;
probe_end = dom->kernel_blob + dom->kernel_size - sizeof(*table);
if ((void*)probe_end > dom->kernel_blob + 8192)
probe_end = dom->kernel_blob + 8192;
for (table = NULL; probe_ptr < probe_end; probe_ptr++)
{
if (XEN_MULTIBOOT_MAGIC3 == *probe_ptr)
{
table = (struct xen_bin_image_table *) probe_ptr;
/* Checksum correct? */
if (0 == table->magic + table->flags + table->checksum)
{
return table;
}
}
}
return NULL;
}
static int xc_dom_probe_bin_kernel(struct xc_dom_image *dom)
{
struct xen_bin_image_table *table;
table = find_table(dom);
if (!table)
return -EINVAL;
return 0;
}
static int xc_dom_parse_bin_kernel(struct xc_dom_image *dom)
{
struct xen_bin_image_table *image_info;
char *image = dom->kernel_blob;
size_t image_size = dom->kernel_size;
uint32_t start_addr;
uint32_t load_end_addr;
uint32_t bss_end_addr;
uint32_t pae_flags;
image_info = find_table(dom);
if (!image_info)
return -EINVAL;
xc_dom_printf("%s: multiboot header fields\n", __FUNCTION__);
xc_dom_printf(" flags: 0x%" PRIx32 "\n", image_info->flags);
xc_dom_printf(" header_addr: 0x%" PRIx32 "\n", image_info->header_addr);
xc_dom_printf(" load_addr: 0x%" PRIx32 "\n", image_info->load_addr);
xc_dom_printf(" load_end_addr: 0x%" PRIx32 "\n", image_info->load_end_addr);
xc_dom_printf(" bss_end_addr: 0x%" PRIx32 "\n", image_info->bss_end_addr);
xc_dom_printf(" entry_addr: 0x%" PRIx32 "\n", image_info->entry_addr);
/* Check the flags */
if ( FLAGS_REQUIRED != (image_info->flags & FLAGS_MASK) )
{
xc_dom_panic(XC_INVALID_KERNEL,
"%s: xen_bin_image_table flags required "
"0x%08" PRIx32 " found 0x%08" PRIx32 "\n",
__FUNCTION__, FLAGS_REQUIRED, image_info->flags & FLAGS_MASK);
return -EINVAL;
}
/* Sanity check on the addresses */
if ( image_info->header_addr < image_info->load_addr ||
((char *) image_info - image) <
(image_info->header_addr - image_info->load_addr) )
{
xc_dom_panic(XC_INVALID_KERNEL, "%s: Invalid header_addr.",
__FUNCTION__);
return -EINVAL;
}
start_addr = image_info->header_addr - ((char *)image_info - image);
load_end_addr = image_info->load_end_addr ?: start_addr + image_size;
bss_end_addr = image_info->bss_end_addr ?: load_end_addr;
xc_dom_printf("%s: calculated addresses\n", __FUNCTION__);
xc_dom_printf(" start_addr: 0x%" PRIx32 "\n", start_addr);
xc_dom_printf(" load_end_addr: 0x%" PRIx32 "\n", load_end_addr);
xc_dom_printf(" bss_end_addr: 0x%" PRIx32 "\n", bss_end_addr);
if ( start_addr + image_size < load_end_addr )
{
xc_dom_panic(XC_INVALID_KERNEL, "%s: Invalid load_end_addr.\n",
__FUNCTION__);
return -EINVAL;
}
if ( bss_end_addr < load_end_addr)
{
xc_dom_panic(XC_INVALID_KERNEL, "%s: Invalid bss_end_addr.\n",
__FUNCTION__);
return -EINVAL;
}
dom->kernel_seg.vstart = image_info->load_addr;
dom->kernel_seg.vend = bss_end_addr;
dom->parms.virt_base = start_addr;
dom->parms.virt_entry = image_info->entry_addr;
pae_flags = image_info->flags & XEN_MULTIBOOT_FLAG_PAE_MASK;
switch (pae_flags >> XEN_MULTIBOOT_FLAG_PAE_SHIFT) {
case 0:
dom->guest_type = "xen-3.0-x86_32";
break;
case 1:
dom->guest_type = "xen-3.0-x86_32p";
break;
case 2:
dom->guest_type = "xen-3.0-x86_64";
break;
case 3:
/* Kernel detects PAE at runtime. So try to figure whenever
* xen supports PAE and advertise a PAE-capable kernel in case
* it does. */
dom->guest_type = "xen-3.0-x86_32";
if (strstr(dom->xen_caps, "xen-3.0-x86_32p")) {
xc_dom_printf("%s: PAE fixup\n", __FUNCTION__);
dom->guest_type = "xen-3.0-x86_32p";
dom->parms.pae = 2;
}
break;
}
return 0;
}
static int xc_dom_load_bin_kernel(struct xc_dom_image *dom)
{
struct xen_bin_image_table *image_info;
char *image = dom->kernel_blob;
char *dest;
size_t image_size = dom->kernel_size;
uint32_t start_addr;
uint32_t load_end_addr;
uint32_t bss_end_addr;
uint32_t skip, text_size, bss_size;
uint32_t pae_flags;
image_info = find_table(dom);
if (!image_info)
return -EINVAL;
start_addr = image_info->header_addr - ((char *)image_info - image);
load_end_addr = image_info->load_end_addr ?: start_addr + image_size;
bss_end_addr = image_info->bss_end_addr ?: load_end_addr;
/* It's possible that we need to skip the first part of the image */
skip = image_info->load_addr - start_addr;
text_size = load_end_addr - image_info->load_addr;
bss_size = bss_end_addr - load_end_addr;
xc_dom_printf("%s: calculated sizes\n", __FUNCTION__);
xc_dom_printf(" skip: 0x%" PRIx32 "\n", skip);
xc_dom_printf(" text_size: 0x%" PRIx32 "\n", text_size);
xc_dom_printf(" bss_size: 0x%" PRIx32 "\n", bss_size);
dest = xc_dom_vaddr_to_ptr(dom, dom->kernel_seg.vstart);
memcpy(dest, image + skip, text_size);
memset(dest + text_size, 0, bss_size);
pae_flags = image_info->flags & XEN_MULTIBOOT_FLAG_PAE_MASK;
if (3 == (pae_flags >> XEN_MULTIBOOT_FLAG_PAE_SHIFT) && dom->guest_xc > 0)
{
}
return 0;
}
/* ------------------------------------------------------------------------ */
static struct xc_dom_loader bin_loader = {
.name = "multiboot-binary",
.probe = xc_dom_probe_bin_kernel,
.parser = xc_dom_parse_bin_kernel,
.loader = xc_dom_load_bin_kernel,
};
static void __init register_loader(void)
{
xc_dom_register_loader(&bin_loader);
}
/*
* Local variables:
* c-basic-offset: 4
* End:
*/
tools/libxc/xc_dom_boot.c
+515
View File
@@ -0,0 +1,515 @@
/*
* Xen domain builder -- xen booter.
*
* This is the code which actually boots a fresh
* prepared domain image as xen guest domain.
*
* ==> this is the only domain bilder code piece
* where xen hypercalls are allowed <==
*
* This code is licenced under the GPL.
* written 2006 by Gerd Hoffmann <kraxel@suse.de>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <zlib.h>
#include "xg_private.h"
#include "xc_dom.h"
#include <xen/hvm/params.h>
/* ------------------------------------------------------------------------ */
static int setup_hypercall_page(struct xc_dom_image *dom)
{
DECLARE_DOMCTL;
xen_pfn_t pfn;
int rc;
if (-1 == dom->parms.virt_hypercall)
return 0;
pfn = (dom->parms.virt_hypercall - dom->parms.virt_base)
>> XC_DOM_PAGE_SHIFT(dom);
xc_dom_printf("%s: vaddr=0x%" PRIx64 " pfn=0x%" PRIpfn "\n", __FUNCTION__,
dom->parms.virt_hypercall, pfn);
domctl.cmd = XEN_DOMCTL_hypercall_init;
domctl.domain = dom->guest_domid;
domctl.u.hypercall_init.gmfn = xc_dom_p2m_guest(dom, pfn);
rc = do_domctl(dom->guest_xc, &domctl);
if (0 != rc)
xc_dom_panic(XC_INTERNAL_ERROR, "%s: HYPERCALL_INIT failed (rc=%d)\n",
__FUNCTION__, rc);
return rc;
}
static int launch_vm(int xc, domid_t domid, void *ctxt)
{
DECLARE_DOMCTL;
int rc;
xc_dom_printf("%s: called, ctxt=%p\n", __FUNCTION__, ctxt);
memset(&domctl, 0, sizeof(domctl));
domctl.cmd = XEN_DOMCTL_setvcpucontext;
domctl.domain = domid;
domctl.u.vcpucontext.vcpu = 0;
set_xen_guest_handle(domctl.u.vcpucontext.ctxt, ctxt);
rc = do_domctl(xc, &domctl);
if (0 != rc)
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: SETVCPUCONTEXT failed (rc=%d)\n", __FUNCTION__, rc);
return rc;
}
static int clear_page(struct xc_dom_image *dom, xen_pfn_t pfn)
{
xen_pfn_t dst;
int rc;
if (0 == pfn)
return 0;
dst = xc_dom_p2m_host(dom, pfn);
xc_dom_printf("%s: pfn 0x%" PRIpfn ", mfn 0x%" PRIpfn "\n",
__FUNCTION__, pfn, dst);
rc = xc_clear_domain_page(dom->guest_xc, dom->guest_domid, dst);
if (0 != rc)
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: xc_clear_domain_page failed (pfn 0x%" PRIpfn
", rc=%d)\n", __FUNCTION__, pfn, rc);
return rc;
}
/* ------------------------------------------------------------------------ */
/* arch stuff: x86 bits */
#if defined(__i386__) || defined(__x86_64__)
static int x86_compat(int xc, domid_t domid, char *guest_type)
{
#ifdef XEN_DOMCTL_set_compat
static const struct {
char *guest;
unsigned long cmd;
} types[] = {
{ "xen-3.0-x86_32p", XEN_DOMCTL_set_compat },
{ "xen-3.0-x86_64", XEN_DOMCTL_set_native },
};
DECLARE_DOMCTL;
int i,rc;
memset(&domctl, 0, sizeof(domctl));
domctl.domain = domid;
for (i = 0; i < sizeof(types)/sizeof(types[0]); i++)
if (0 == strcmp(types[i].guest, guest_type))
domctl.cmd = types[i].cmd;
if (0 == domctl.cmd)
/* nothing to do */
return 0;
xc_dom_printf("%s: guest %s, cmd %d\n", __FUNCTION__,
guest_type, domctl.cmd);
rc = do_domctl(xc, &domctl);
if (0 != rc)
xc_dom_printf("%s: warning: failed (rc=%d)\n",
__FUNCTION__, rc);
return rc;
#else
xc_dom_printf("%s: compiled without compat/native switching\n", __FUNCTION__);
return 0;
#endif /* XEN_DOMCTL_set_compat */
}
static int x86_shadow(int xc, domid_t domid)
{
int rc, mode;
xc_dom_printf("%s: called\n", __FUNCTION__);
mode = XEN_DOMCTL_SHADOW_ENABLE_REFCOUNT |
XEN_DOMCTL_SHADOW_ENABLE_TRANSLATE;
rc = xc_shadow_control(xc, domid,
XEN_DOMCTL_SHADOW_OP_ENABLE,
NULL, 0, NULL, mode, NULL);
if (0 != rc)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: SHADOW_OP_ENABLE (mode=0x%x) failed (rc=%d)\n",
__FUNCTION__, mode, rc);
return rc;
}
xc_dom_printf("%s: shadow enabled (mode=0x%x)\n", __FUNCTION__, mode);
return rc;
}
static int arch_setup_early(struct xc_dom_image *dom)
{
int rc = 0;
x86_compat(dom->guest_xc, dom->guest_domid, dom->guest_type);
if (xc_dom_feature_translated(dom))
{
dom->shadow_enabled = 1;
rc = x86_shadow(dom->guest_xc, dom->guest_domid);
}
return rc;
}
static int arch_setup_late(struct xc_dom_image *dom)
{
static const struct {
char *guest;
unsigned long pgd_type;
} types[] = {
{ "xen-3.0-x86_32", MMUEXT_PIN_L2_TABLE},
{ "xen-3.0-x86_32p", MMUEXT_PIN_L3_TABLE},
{ "xen-3.0-x86_64", MMUEXT_PIN_L4_TABLE},
};
unsigned long pgd_type = 0;
shared_info_t *shared_info;
xen_pfn_t shinfo;
int i, rc;
for (i = 0; i < sizeof(types) / sizeof(types[0]); i++)
if (0 == strcmp(types[i].guest, dom->guest_type))
pgd_type = types[i].pgd_type;
if (!xc_dom_feature_translated(dom))
{
/* paravirtualized guest */
xc_dom_unmap_one(dom, dom->pgtables_seg.pfn);
rc = pin_table(dom->guest_xc, pgd_type,
xc_dom_p2m_host(dom, dom->pgtables_seg.pfn),
dom->guest_domid);
if (0 != rc)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: pin_table failed (pfn 0x%" PRIpfn ", rc=%d)\n",
__FUNCTION__, dom->pgtables_seg.pfn, rc);
return rc;
}
shinfo = dom->shared_info_mfn;
}
else
{
/* paravirtualized guest with auto-translation */
struct xen_add_to_physmap xatp;
int i;
/* Map shared info frame into guest physmap. */
xatp.domid = dom->guest_domid;
xatp.space = XENMAPSPACE_shared_info;
xatp.idx = 0;
xatp.gpfn = dom->shared_info_pfn;
rc = xc_memory_op(dom->guest_xc, XENMEM_add_to_physmap, &xatp);
if (rc != 0)
{
xc_dom_panic(XC_INTERNAL_ERROR, "%s: mapping shared_info failed "
"(pfn=0x%" PRIpfn ", rc=%d)\n",
__FUNCTION__, xatp.gpfn, rc);
return rc;
}
/* Map grant table frames into guest physmap. */
for (i = 0;; i++)
{
xatp.domid = dom->guest_domid;
xatp.space = XENMAPSPACE_grant_table;
xatp.idx = i;
xatp.gpfn = dom->total_pages + i;
rc = xc_memory_op(dom->guest_xc, XENMEM_add_to_physmap, &xatp);
if (rc != 0)
{
if (i > 0 && errno == EINVAL)
{
xc_dom_printf("%s: %d grant tables mapped\n", __FUNCTION__,
i);
break;
}
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: mapping grant tables failed " "(pfn=0x%"
PRIpfn ", rc=%d)\n", __FUNCTION__, xatp.gpfn, rc);
return rc;
}
}
shinfo = dom->shared_info_pfn;
}
/* setup shared_info page */
xc_dom_printf("%s: shared_info: pfn 0x%" PRIpfn ", mfn 0x%" PRIpfn "\n",
__FUNCTION__, dom->shared_info_pfn, dom->shared_info_mfn);
shared_info = xc_map_foreign_range(dom->guest_xc, dom->guest_domid,
PAGE_SIZE_X86,
PROT_READ | PROT_WRITE,
shinfo);
if (NULL == shared_info)
return -1;
dom->arch_hooks->shared_info(dom, shared_info);
munmap(shared_info, PAGE_SIZE_X86);
return 0;
}
/* ------------------------------------------------------------------------ */
/* arch stuff: ia64 */
#elif defined(__ia64__)
static int arch_setup_early(struct xc_dom_image *dom)
{
DECLARE_DOMCTL;
int rc;
xc_dom_printf("%s: setup firmware\n", __FUNCTION__);
memset(&domctl, 0, sizeof(domctl));
domctl.cmd = XEN_DOMCTL_arch_setup;
domctl.domain = dom->guest_domid;
domctl.u.arch_setup.flags = 0;
domctl.u.arch_setup.bp = (dom->start_info_pfn << PAGE_SHIFT)
+ sizeof(start_info_t);
domctl.u.arch_setup.maxmem = dom->total_pages << PAGE_SHIFT;
rc = do_domctl(dom->guest_xc, &domctl);
return rc;
}
static int arch_setup_late(struct xc_dom_image *dom)
{
xc_dom_printf("%s: doing nothing\n", __FUNCTION__);
return 0;
}
/* ------------------------------------------------------------------------ */
/* arch stuff: powerpc */
#elif defined(__powerpc64__)
static int arch_setup_early(struct xc_dom_image *dom)
{
xc_dom_printf("%s: doing nothing\n", __FUNCTION__);
return 0;
}
static int arch_setup_late(struct xc_dom_image *dom)
{
start_info_t *si =
xc_dom_pfn_to_ptr(dom, dom->start_info_pfn, 1);
xc_dom_printf("%s: TODO: setup devtree\n", __FUNCTION__);
#if 0
load_devtree(dom->guest_xc,
dom->guest_domid,
dom->p2m_host,
devtree, // FIXME
devtree_addr, // FIXME
dom->ramdisk_seg.vstart,
dom->ramdisk_seg.vend - dom->ramdisk_seg.vstart,
si,
dom->start_info_pfn << PAGE_SHIFT);
#endif
return rc;
}
/* ------------------------------------------------------------------------ */
/* arch stuff: other */
#else
static int arch_setup_early(struct xc_dom_image *dom)
{
xc_dom_printf("%s: doing nothing\n", __FUNCTION__);
return 0;
}
static int arch_setup_late(struct xc_dom_image *dom)
{
xc_dom_printf("%s: doing nothing\n", __FUNCTION__);
return 0;
}
#endif /* arch stuff */
/* ------------------------------------------------------------------------ */
int xc_dom_compat_check(struct xc_dom_image *dom)
{
xen_capabilities_info_t xen_caps;
char *item, *ptr;
int match, found = 0;
strcpy(xen_caps, dom->xen_caps);
for (item = strtok_r(xen_caps, " ", &ptr);
NULL != item; item = strtok_r(NULL, " ", &ptr))
{
match = (0 == strcmp(dom->guest_type, item));
xc_dom_printf("%s: supported guest type: %s%s\n", __FUNCTION__,
item, match ? " <= matches" : "");
if (match)
found++;
}
if (!found)
xc_dom_panic(XC_INVALID_KERNEL,
"%s: guest type %s not supported by xen kernel, sorry\n",
__FUNCTION__, dom->guest_type);
return found;
}
int xc_dom_boot_xen_init(struct xc_dom_image *dom, int xc, domid_t domid)
{
dom->guest_xc = xc;
dom->guest_domid = domid;
dom->xen_version = xc_version(dom->guest_xc, XENVER_version, NULL);
if (xc_version(xc, XENVER_capabilities, &dom->xen_caps) < 0) {
xc_dom_panic(XC_INTERNAL_ERROR, "can't get xen capabilities");
return -1;
}
xc_dom_printf("%s: ver %d.%d, caps %s\n", __FUNCTION__,
dom->xen_version >> 16, dom->xen_version & 0xff,
dom->xen_caps);
return 0;
}
int xc_dom_boot_mem_init(struct xc_dom_image *dom)
{
long rc;
xc_dom_printf("%s: called\n", __FUNCTION__);
if (0 != (rc = arch_setup_early(dom)))
return rc;
/* allocate guest memory */
rc = xc_domain_memory_populate_physmap(dom->guest_xc, dom->guest_domid,
dom->total_pages, 0, 0,
dom->p2m_host);
if (0 != rc)
{
xc_dom_panic(XC_OUT_OF_MEMORY,
"%s: can't allocate low memory for domain\n",
__FUNCTION__);
return rc;
}
return 0;
}
void *xc_dom_boot_domU_map(struct xc_dom_image *dom, xen_pfn_t pfn,
xen_pfn_t count)
{
int page_shift = XC_DOM_PAGE_SHIFT(dom);
privcmd_mmap_entry_t *entries;
void *ptr;
int i, rc;
entries = xc_dom_malloc(dom, count * sizeof(privcmd_mmap_entry_t));
if (NULL == entries)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: failed to mmap domU pages 0x%" PRIpfn "+0x%" PRIpfn
" [malloc]\n", __FUNCTION__, pfn, count);
return NULL;
}
ptr = mmap(NULL, count << page_shift, PROT_READ | PROT_WRITE,
MAP_SHARED, dom->guest_xc, 0);
if (MAP_FAILED == ptr)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: failed to mmap domU pages 0x%" PRIpfn "+0x%" PRIpfn
" [mmap]\n", __FUNCTION__, pfn, count);
return NULL;
}
for (i = 0; i < count; i++)
{
entries[i].va = (uintptr_t) ptr + (i << page_shift);
entries[i].mfn = xc_dom_p2m_host(dom, pfn + i);
entries[i].npages = 1;
}
rc = xc_map_foreign_ranges(dom->guest_xc, dom->guest_domid, entries, count);
if (rc < 0)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: failed to mmap domU pages 0x%" PRIpfn "+0x%" PRIpfn
" [xenctl, rc=%d]\n", __FUNCTION__, pfn, count, rc);
return NULL;
}
return ptr;
}
int xc_dom_boot_image(struct xc_dom_image *dom)
{
DECLARE_DOMCTL;
void *ctxt;
int rc;
xc_dom_printf("%s: called\n", __FUNCTION__);
/* collect some info */
domctl.cmd = XEN_DOMCTL_getdomaininfo;
domctl.domain = dom->guest_domid;
rc = do_domctl(dom->guest_xc, &domctl);
if (0 != rc)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: getdomaininfo failed (rc=%d)\n", __FUNCTION__, rc);
return rc;
}
if (domctl.domain != dom->guest_domid)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: Huh? domid mismatch (%d != %d)\n", __FUNCTION__,
domctl.domain, dom->guest_domid);
return -1;
}
dom->shared_info_mfn = domctl.u.getdomaininfo.shared_info_frame;
/* sanity checks */
if (!xc_dom_compat_check(dom))
return -1;
/* initial mm setup */
if (0 != (rc = xc_dom_update_guest_p2m(dom)))
return rc;
if (dom->arch_hooks->setup_pgtables)
if (0 != (rc = dom->arch_hooks->setup_pgtables(dom)))
return rc;
if (0 != (rc = clear_page(dom, dom->console_pfn)))
return rc;
if (0 != (rc = clear_page(dom, dom->xenstore_pfn)))
return rc;
/* start info page */
if (dom->arch_hooks->start_info)
dom->arch_hooks->start_info(dom);
/* hypercall page */
if (0 != (rc = setup_hypercall_page(dom)))
return rc;
xc_dom_log_memory_footprint(dom);
/* misc x86 stuff */
if (0 != (rc = arch_setup_late(dom)))
return rc;
/* let the vm run */
ctxt = xc_dom_malloc(dom, PAGE_SIZE * 2 /* FIXME */ );
memset(ctxt, 0, PAGE_SIZE * 2);
if (0 != (rc = dom->arch_hooks->vcpu(dom, ctxt)))
return rc;
xc_dom_unmap_all(dom);
rc = launch_vm(dom->guest_xc, dom->guest_domid, ctxt);
return rc;
}
tools/libxc/xc_dom_core.c
+773
View File
@@ -0,0 +1,773 @@
/*
* Xen domain builder -- core bits.
*
* The core code goes here:
* - allocate and release domain structs.
* - memory management functions.
* - misc helper functions.
*
* This code is licenced under the GPL.
* written 2006 by Gerd Hoffmann <kraxel@suse.de>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <inttypes.h>
#include <zlib.h>
#include "xg_private.h"
#include "xc_dom.h"
/* ------------------------------------------------------------------------ */
/* debugging */
FILE *xc_dom_logfile = NULL;
void xc_dom_loginit(void)
{
if (xc_dom_logfile)
return;
xc_dom_logfile = fopen("/var/log/xen/domain-builder-ng.log", "a");
setvbuf(xc_dom_logfile, NULL, _IONBF, 0);
xc_dom_printf("### ----- xc domain builder logfile opened -----\n");
}
int xc_dom_printf(const char *fmt, ...)
{
va_list args;
char buf[1024];
int rc;
if (!xc_dom_logfile)
return 0;
va_start(args, fmt);
rc = vsnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
rc = fwrite(buf, rc, 1, xc_dom_logfile);
return rc;
}
int xc_dom_panic_func(const char *file, int line, xc_error_code err,
const char *fmt, ...)
{
va_list args;
FILE *fp = stderr;
int rc = 0;
char pos[256];
char msg[XC_MAX_ERROR_MSG_LEN];
if (xc_dom_logfile)
fp = xc_dom_logfile;
snprintf(pos, sizeof(pos), "%s:%d: panic: ", file, line);
va_start(args, fmt);
vsnprintf(msg, sizeof(msg), fmt, args);
va_end(args);
xc_set_error(err, "%s", msg);
rc = fprintf(fp, "%s%s", pos, msg);
return rc;
}
static void print_mem(const char *name, size_t mem)
{
if (mem > 32 * 1024 * 1024)
xc_dom_printf("%-24s : %zd MB\n", name, mem / (1024 * 1024));
else if (mem > 32 * 1024)
xc_dom_printf("%-24s : %zd kB\n", name, mem / 1024);
else
xc_dom_printf("%-24s : %zd bytes\n", name, mem);
}
void xc_dom_log_memory_footprint(struct xc_dom_image *dom)
{
xc_dom_printf("domain builder memory footprint\n");
xc_dom_printf(" allocated\n");
print_mem(" malloc", dom->alloc_malloc);
print_mem(" anon mmap", dom->alloc_mem_map);
xc_dom_printf(" mapped\n");
print_mem(" file mmap", dom->alloc_file_map);
print_mem(" domU mmap", dom->alloc_domU_map);
}
/* ------------------------------------------------------------------------ */
/* simple memory pool */
void *xc_dom_malloc(struct xc_dom_image *dom, size_t size)
{
struct xc_dom_mem *block;
block = malloc(sizeof(*block) + size);
if (NULL == block)
return NULL;
memset(block, 0, sizeof(*block) + size);
block->next = dom->memblocks;
dom->memblocks = block;
dom->alloc_malloc += sizeof(*block) + size;
if (size > 100 * 1024)
print_mem(__FUNCTION__, size);
return block->memory;
}
void *xc_dom_malloc_page_aligned(struct xc_dom_image *dom, size_t size)
{
struct xc_dom_mem *block;
block = malloc(sizeof(*block));
if (NULL == block)
return NULL;
memset(block, 0, sizeof(*block));
block->mmap_len = size;
block->mmap_ptr = mmap(NULL, block->mmap_len,
PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
-1, 0);
if (MAP_FAILED == block->mmap_ptr)
{
free(block);
return NULL;
}
block->next = dom->memblocks;
dom->memblocks = block;
dom->alloc_malloc += sizeof(*block);
dom->alloc_mem_map += block->mmap_len;
if (size > 100 * 1024)
print_mem(__FUNCTION__, size);
return block->mmap_ptr;
}
void *xc_dom_malloc_filemap(struct xc_dom_image *dom,
const char *filename, size_t * size)
{
struct xc_dom_mem *block = NULL;
int fd = -1;
fd = open(filename, O_RDONLY);
if (-1 == fd)
goto err;
lseek(fd, 0, SEEK_SET);
*size = lseek(fd, 0, SEEK_END);
block = malloc(sizeof(*block));
if (NULL == block)
goto err;
memset(block, 0, sizeof(*block));
block->mmap_len = *size;
block->mmap_ptr = mmap(NULL, block->mmap_len, PROT_READ, MAP_SHARED, fd, 0);
if (MAP_FAILED == block->mmap_ptr)
goto err;
block->next = dom->memblocks;
dom->memblocks = block;
dom->alloc_malloc += sizeof(*block);
dom->alloc_file_map += block->mmap_len;
close(fd);
if (*size > 100 * 1024)
print_mem(__FUNCTION__, *size);
return block->mmap_ptr;
err:
if (-1 != fd)
close(fd);
if (block)
free(block);
return NULL;
}
static void xc_dom_free_all(struct xc_dom_image *dom)
{
struct xc_dom_mem *block;
while (NULL != (block = dom->memblocks))
{
dom->memblocks = block->next;
if (block->mmap_ptr)
munmap(block->mmap_ptr, block->mmap_len);
free(block);
}
}
char *xc_dom_strdup(struct xc_dom_image *dom, const char *str)
{
size_t len = strlen(str) + 1;
char *nstr = xc_dom_malloc(dom, len);
if (NULL == nstr)
return NULL;
memcpy(nstr, str, len);
return nstr;
}
/* ------------------------------------------------------------------------ */
/* read files, copy memory blocks, with transparent gunzip */
size_t xc_dom_check_gzip(void *blob, size_t ziplen)
{
unsigned char *gzlen;
size_t unziplen;
if (0 != strncmp(blob, "\037\213", 2))
/* not gzipped */
return 0;
gzlen = blob + ziplen - 4;
unziplen = gzlen[3] << 24 | gzlen[2] << 16 | gzlen[1] << 8 | gzlen[0];
if (unziplen < ziplen || unziplen > ziplen * 8)
{
xc_dom_printf
("%s: size (zip %zd, unzip %zd) looks insane, skip gunzip\n",
__FUNCTION__, ziplen, unziplen);
return 0;
}
return unziplen + 16;
}
int xc_dom_do_gunzip(void *src, size_t srclen, void *dst, size_t dstlen)
{
z_stream zStream;
int rc;
memset(&zStream, 0, sizeof(zStream));
zStream.next_in = src;
zStream.avail_in = srclen;
zStream.next_out = dst;
zStream.avail_out = dstlen;
rc = inflateInit2(&zStream, (MAX_WBITS + 32)); /* +32 means "handle gzip" */
if (rc != Z_OK)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: inflateInit2 failed (rc=%d)\n", __FUNCTION__, rc);
return -1;
}
rc = inflate(&zStream, Z_FINISH);
if (rc != Z_STREAM_END)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: inflate failed (rc=%d)\n", __FUNCTION__, rc);
return -1;
}
xc_dom_printf("%s: unzip ok, 0x%zx -> 0x%zx\n",
__FUNCTION__, srclen, dstlen);
return 0;
}
int xc_dom_try_gunzip(struct xc_dom_image *dom, void **blob, size_t * size)
{
void *unzip;
size_t unziplen;
unziplen = xc_dom_check_gzip(*blob, *size);
if (0 == unziplen)
return 0;
unzip = xc_dom_malloc(dom, unziplen);
if (NULL == unzip)
return -1;
if (-1 == xc_dom_do_gunzip(*blob, *size, unzip, unziplen))
return -1;
*blob = unzip;
*size = unziplen;
return 0;
}
/* ------------------------------------------------------------------------ */
/* domain memory */
void *xc_dom_pfn_to_ptr(struct xc_dom_image *dom, xen_pfn_t pfn,
xen_pfn_t count)
{
struct xc_dom_phys *phys;
unsigned int page_shift = XC_DOM_PAGE_SHIFT(dom);
char *mode = "unset";
if (pfn > dom->total_pages)
{
xc_dom_printf("%s: pfn out of range (0x%" PRIpfn " > 0x%" PRIpfn ")\n",
__FUNCTION__, pfn, dom->total_pages);
return NULL;
}
/* already allocated? */
for (phys = dom->phys_pages; NULL != phys; phys = phys->next)
{
if (pfn >= phys->first + phys->count)
continue;
if (count)
{
/* size given: must be completely within the already allocated block */
if (pfn + count <= phys->first)
continue;
if (pfn < phys->first || pfn + count > phys->first + phys->count)
{
xc_dom_printf("%s: request overlaps allocated block"
" (req 0x%" PRIpfn "+0x%" PRIpfn ","
" blk 0x%" PRIpfn "+0x%" PRIpfn ")\n",
__FUNCTION__, pfn, count, phys->first,
phys->count);
return NULL;
}
}
else
{
/* no size given: block must be allocated already,
just hand out a pointer to it */
if (pfn < phys->first)
continue;
}
return phys->ptr + ((pfn - phys->first) << page_shift);
}
/* allocating is allowed with size specified only */
if (0 == count)
{
xc_dom_printf("%s: no block found, no size given,"
" can't malloc (pfn 0x%" PRIpfn ")\n", __FUNCTION__, pfn);
return NULL;
}
/* not found, no overlap => allocate */
phys = xc_dom_malloc(dom, sizeof(*phys));
if (NULL == phys)
return NULL;
memset(phys, 0, sizeof(*phys));
phys->first = pfn;
phys->count = count;
if (dom->guest_domid)
{
mode = "domU mapping";
phys->ptr = xc_dom_boot_domU_map(dom, phys->first, phys->count);
if (NULL == phys->ptr)
return NULL;
dom->alloc_domU_map += phys->count << page_shift;
}
else
{
mode = "anonymous memory";
phys->ptr = mmap(NULL, phys->count << page_shift,
PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
-1, 0);
if (MAP_FAILED == phys->ptr)
{
xc_dom_panic(XC_OUT_OF_MEMORY,
"%s: oom: can't allocate 0x%" PRIpfn " pages\n",
__FUNCTION__, count);
return NULL;
}
dom->alloc_mem_map += phys->count << page_shift;
}
#if 1
xc_dom_printf("%s: %s: pfn 0x%" PRIpfn "+0x%" PRIpfn " at %p\n",
__FUNCTION__, mode, phys->first, phys->count, phys->ptr);
#endif
phys->next = dom->phys_pages;
dom->phys_pages = phys;
return phys->ptr;
}
int xc_dom_alloc_segment(struct xc_dom_image *dom,
struct xc_dom_seg *seg, char *name,
xen_vaddr_t start, xen_vaddr_t size)
{
unsigned int page_size = XC_DOM_PAGE_SIZE(dom);
xen_pfn_t pages = (size + page_size - 1) / page_size;
void *ptr;
if (0 == start)
start = dom->virt_alloc_end;
if (start & (page_size - 1))
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: segment start isn't page aligned (0x%" PRIx64 ")\n",
__FUNCTION__, start);
return -1;
}
if (start < dom->virt_alloc_end)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: segment start too low (0x%" PRIx64 " < 0x%" PRIx64
")\n", __FUNCTION__, start, dom->virt_alloc_end);
return -1;
}
seg->vstart = start;
seg->vend = start + pages * page_size;
seg->pfn = (seg->vstart - dom->parms.virt_base) / page_size;
dom->virt_alloc_end = seg->vend;
xc_dom_printf("%-20s: %-12s : 0x%" PRIx64 " -> 0x%" PRIx64
" (pfn 0x%" PRIpfn " + 0x%" PRIpfn " pages)\n",
__FUNCTION__, name, seg->vstart, seg->vend, seg->pfn, pages);
/* map and clear pages */
ptr = xc_dom_seg_to_ptr(dom, seg);
if (NULL == ptr)
return -1;
memset(ptr, 0, pages * page_size);
return 0;
}
int xc_dom_alloc_page(struct xc_dom_image *dom, char *name)
{
unsigned int page_size = XC_DOM_PAGE_SIZE(dom);
xen_vaddr_t start;
xen_pfn_t pfn;
start = dom->virt_alloc_end;
dom->virt_alloc_end += page_size;
pfn = (start - dom->parms.virt_base) / page_size;
xc_dom_printf("%-20s: %-12s : 0x%" PRIx64 " (pfn 0x%" PRIpfn ")\n",
__FUNCTION__, name, start, pfn);
return pfn;
}
void xc_dom_unmap_one(struct xc_dom_image *dom, xen_pfn_t pfn)
{
unsigned int page_shift = XC_DOM_PAGE_SHIFT(dom);
struct xc_dom_phys *phys, *prev = NULL;
for (phys = dom->phys_pages; NULL != phys; phys = phys->next)
{
if (pfn >= phys->first && pfn < phys->first + phys->count)
break;
prev = phys;
}
if (!phys)
{
xc_dom_printf("%s: Huh? no mapping with pfn 0x%" PRIpfn "\n",
__FUNCTION__, pfn);
return;
}
munmap(phys->ptr, phys->count << page_shift);
if (prev)
prev->next = phys->next;
else
dom->phys_pages = phys->next;
}
void xc_dom_unmap_all(struct xc_dom_image *dom)
{
while (dom->phys_pages)
xc_dom_unmap_one(dom, dom->phys_pages->first);
}
/* ------------------------------------------------------------------------ */
/* pluggable kernel loaders */
static struct xc_dom_loader *first_loader = NULL;
static struct xc_dom_arch *first_hook = NULL;
void xc_dom_register_loader(struct xc_dom_loader *loader)
{
loader->next = first_loader;
first_loader = loader;
}
static struct xc_dom_loader *xc_dom_find_loader(struct xc_dom_image *dom)
{
struct xc_dom_loader *loader = first_loader;
while (NULL != loader)
{
xc_dom_printf("%s: trying %s loader ... ", __FUNCTION__, loader->name);
if (0 == loader->probe(dom))
{
xc_dom_printf("OK\n");
return loader;
}
xc_dom_printf("failed\n");
loader = loader->next;
}
xc_dom_panic(XC_INVALID_KERNEL, "%s: no loader found\n", __FUNCTION__);
return NULL;
}
void xc_dom_register_arch_hooks(struct xc_dom_arch *hooks)
{
hooks->next = first_hook;
first_hook = hooks;
}
static struct xc_dom_arch *xc_dom_find_arch_hooks(char *guest_type)
{
struct xc_dom_arch *hooks = first_hook;
while (NULL != hooks)
{
if (0 == strcmp(hooks->guest_type, guest_type))
return hooks;
hooks = hooks->next;
}
xc_dom_panic(XC_INVALID_KERNEL,
"%s: not found (type %s)\n", __FUNCTION__, guest_type);
return NULL;
}
/* ------------------------------------------------------------------------ */
/* public interface */
void xc_dom_release(struct xc_dom_image *dom)
{
xc_dom_printf("%s: called\n", __FUNCTION__);
if (dom->phys_pages)
xc_dom_unmap_all(dom);
xc_dom_free_all(dom);
free(dom);
}
struct xc_dom_image *xc_dom_allocate(const char *cmdline, const char *features)
{
struct xc_dom_image *dom;
xc_dom_printf("%s: cmdline=\"%s\", features=\"%s\"\n",
__FUNCTION__, cmdline, features);
dom = malloc(sizeof(*dom));
if (!dom)
goto err;
memset(dom, 0, sizeof(*dom));
if (cmdline)
dom->cmdline = xc_dom_strdup(dom, cmdline);
if (features)
elf_xen_parse_features(features, dom->f_requested, NULL);
dom->parms.virt_base = UNSET_ADDR;
dom->parms.virt_entry = UNSET_ADDR;
dom->parms.virt_hypercall = UNSET_ADDR;
dom->parms.virt_hv_start_low = UNSET_ADDR;
dom->parms.elf_paddr_offset = UNSET_ADDR;
dom->alloc_malloc += sizeof(*dom);
return dom;
err:
if (dom)
xc_dom_release(dom);
return NULL;
}
int xc_dom_kernel_file(struct xc_dom_image *dom, const char *filename)
{
xc_dom_printf("%s: filename=\"%s\"\n", __FUNCTION__, filename);
dom->kernel_blob = xc_dom_malloc_filemap(dom, filename, &dom->kernel_size);
if (NULL == dom->kernel_blob)
return -1;
return xc_dom_try_gunzip(dom, &dom->kernel_blob, &dom->kernel_size);
}
int xc_dom_ramdisk_file(struct xc_dom_image *dom, const char *filename)
{
xc_dom_printf("%s: filename=\"%s\"\n", __FUNCTION__, filename);
dom->ramdisk_blob =
xc_dom_malloc_filemap(dom, filename, &dom->ramdisk_size);
if (NULL == dom->ramdisk_blob)
return -1;
// return xc_dom_try_gunzip(dom, &dom->ramdisk_blob, &dom->ramdisk_size);
return 0;
}
int xc_dom_kernel_mem(struct xc_dom_image *dom, const void *mem, size_t memsize)
{
xc_dom_printf("%s: called\n", __FUNCTION__);
dom->kernel_blob = (void *)mem;
dom->kernel_size = memsize;
return xc_dom_try_gunzip(dom, &dom->kernel_blob, &dom->kernel_size);
}
int xc_dom_ramdisk_mem(struct xc_dom_image *dom, const void *mem,
size_t memsize)
{
xc_dom_printf("%s: called\n", __FUNCTION__);
dom->ramdisk_blob = (void *)mem;
dom->ramdisk_size = memsize;
// return xc_dom_try_gunzip(dom, &dom->ramdisk_blob, &dom->ramdisk_size);
return 0;
}
int xc_dom_parse_image(struct xc_dom_image *dom)
{
int i;
xc_dom_printf("%s: called\n", __FUNCTION__);
/* parse kernel image */
dom->kernel_loader = xc_dom_find_loader(dom);
if (NULL == dom->kernel_loader)
goto err;
if (0 != dom->kernel_loader->parser(dom))
goto err;
if (NULL == dom->guest_type)
{
xc_dom_panic(XC_INTERNAL_ERROR,
"%s: guest_type not set\n", __FUNCTION__);
goto err;
}
/* check features */
for (i = 0; i < XENFEAT_NR_SUBMAPS; i++)
{
dom->f_active[i] |= dom->f_requested[i]; /* cmd line */
dom->f_active[i] |= dom->parms.f_required[i]; /* kernel */
if ((dom->f_active[i] & dom->parms.f_supported[i]) != dom->f_active[i])
{
xc_dom_panic(XC_INVALID_PARAM,
"%s: unsupported feature requested\n", __FUNCTION__);
goto err;
}
}
return 0;
err:
return -1;
}
int xc_dom_mem_init(struct xc_dom_image *dom, unsigned int mem_mb)
{
unsigned int page_shift;
xen_pfn_t nr_pages, pfn;
dom->arch_hooks = xc_dom_find_arch_hooks(dom->guest_type);
if (NULL == dom->arch_hooks)
{
xc_dom_panic(XC_INTERNAL_ERROR, "%s: arch hooks not set\n",
__FUNCTION__);
return -1;
}
page_shift = XC_DOM_PAGE_SHIFT(dom);
nr_pages = mem_mb << (20 - page_shift);
xc_dom_printf("%s: mem %d MB, pages 0x%" PRIpfn " pages, %dk each\n",
__FUNCTION__, mem_mb, nr_pages, 1 << (page_shift-10));
dom->total_pages = nr_pages;
xc_dom_printf("%s: 0x%" PRIpfn " pages\n",
__FUNCTION__, dom->total_pages);
/* setup initial p2m */
dom->p2m_host = xc_dom_malloc(dom, sizeof(xen_pfn_t) * dom->total_pages);
for (pfn = 0; pfn < dom->total_pages; pfn++)
dom->p2m_host[pfn] = pfn;
return 0;
}
int xc_dom_update_guest_p2m(struct xc_dom_image *dom)
{
uint32_t *p2m_32;
uint64_t *p2m_64;
xen_pfn_t i;
if (!dom->p2m_guest)
return 0;
switch (dom->arch_hooks->sizeof_pfn)
{
case 4:
xc_dom_printf("%s: dst 32bit, pages 0x%" PRIpfn " \n",
__FUNCTION__, dom->total_pages);
p2m_32 = dom->p2m_guest;
for (i = 0; i < dom->total_pages; i++)
if (INVALID_P2M_ENTRY != dom->p2m_host[i])
p2m_32[i] = dom->p2m_host[i];
else
p2m_32[i] = (uint32_t) - 1;
break;
case 8:
xc_dom_printf("%s: dst 64bit, pages 0x%" PRIpfn " \n",
__FUNCTION__, dom->total_pages);
p2m_64 = dom->p2m_guest;
for (i = 0; i < dom->total_pages; i++)
if (INVALID_P2M_ENTRY != dom->p2m_host[i])
p2m_64[i] = dom->p2m_host[i];
else
p2m_64[i] = (uint64_t) - 1;
break;
default:
xc_dom_panic(XC_INTERNAL_ERROR,
"sizeof_pfn is invalid (is %d, can be 4 or 8)",
dom->arch_hooks->sizeof_pfn);
return -1;
}
return 0;
}
int xc_dom_build_image(struct xc_dom_image *dom)
{
unsigned int page_size;
xc_dom_printf("%s: called\n", __FUNCTION__);
/* check for arch hooks */
if (NULL == dom->arch_hooks)
{
xc_dom_panic(XC_INTERNAL_ERROR, "%s: arch hooks not set\n",
__FUNCTION__);
goto err;
}
page_size = XC_DOM_PAGE_SIZE(dom);
/* load kernel */
if (0 != xc_dom_alloc_segment(dom, &dom->kernel_seg, "kernel",
dom->kernel_seg.vstart,
dom->kernel_seg.vend -
dom->kernel_seg.vstart))
goto err;
if (0 != dom->kernel_loader->loader(dom))
goto err;
/* load ramdisk */
if (dom->ramdisk_blob)
{
size_t unziplen, ramdisklen;
void *ramdiskmap;
unziplen = xc_dom_check_gzip(dom->ramdisk_blob, dom->ramdisk_size);
ramdisklen = unziplen ? unziplen : dom->ramdisk_size;
if (0 != xc_dom_alloc_segment(dom, &dom->ramdisk_seg, "ramdisk", 0,
ramdisklen))
goto err;
ramdiskmap = xc_dom_seg_to_ptr(dom, &dom->ramdisk_seg);
if (unziplen)
{
if (-1 == xc_dom_do_gunzip(dom->ramdisk_blob, dom->ramdisk_size,
ramdiskmap, ramdisklen))
goto err;
}
else
memcpy(ramdiskmap, dom->ramdisk_blob, dom->ramdisk_size);
}
/* allocate other pages */
if (0 != dom->arch_hooks->alloc_magic_pages(dom))
goto err;
if (dom->arch_hooks->count_pgtables)
{
dom->arch_hooks->count_pgtables(dom);
if (dom->pgtables > 0)
if (0 !=
xc_dom_alloc_segment(dom, &dom->pgtables_seg, "page tables", 0,
dom->pgtables * page_size))
goto err;
}
if (dom->alloc_bootstack)
dom->bootstack_pfn = xc_dom_alloc_page(dom, "boot stack");
xc_dom_printf("%-20s: virt_alloc_end : 0x%" PRIx64 "\n",
__FUNCTION__, dom->virt_alloc_end);
xc_dom_printf("%-20s: virt_pgtab_end : 0x%" PRIx64 "\n",
__FUNCTION__, dom->virt_pgtab_end);
return 0;
err:
return -1;
}
tools/libxc/xc_dom_elfloader.c
+283
View File
@@ -0,0 +1,283 @@
/*
* Xen domain builder -- ELF bits.
*
* Parse and load ELF kernel images.
*
* This code is licenced under the GPL.
* written 2006 by Gerd Hoffmann <kraxel@suse.de>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include "xg_private.h"
#include "xc_dom.h"
#define XEN_VER "xen-3.0"
/* ------------------------------------------------------------------------ */
static char *xc_dom_guest_type(struct xc_dom_image *dom,
struct elf_binary *elf)
{
uint64_t machine = elf_uval(elf, elf->ehdr, e_machine);
switch (machine) {
case EM_386:
switch (dom->parms.pae) {
case 3 /* PAEKERN_bimodal */:
if (strstr(dom->xen_caps, "xen-3.0-x86_32p"))
return "xen-3.0-x86_32p";
return "xen-3.0-x86_32";
case PAEKERN_extended_cr3:
case PAEKERN_yes:
return "xen-3.0-x86_32p";
break;
case PAEKERN_no:
default:
return "xen-3.0-x86_32";
}
case EM_X86_64:
return "xen-3.0-x86_64";
case EM_IA_64:
return elf_msb(elf) ? "xen-3.0-ia64be" : "xen-3.0-ia64";
case EM_PPC64:
return "xen-3.0-powerpc64";
default:
return "xen-3.0-unknown";
}
}
/* ------------------------------------------------------------------------ */
/* parse elf binary */
static int check_elf_kernel(struct xc_dom_image *dom, int verbose)
{
if (NULL == dom->kernel_blob)
{
if (verbose)
xc_dom_panic(XC_INTERNAL_ERROR, "%s: no kernel image loaded\n",
__FUNCTION__);
return -EINVAL;
}
if (!elf_is_elfbinary(dom->kernel_blob))
{
if (verbose)
xc_dom_panic(XC_INVALID_KERNEL, "%s: kernel is not an ELF image\n",
__FUNCTION__);
return -EINVAL;
}
return 0;
}
static int xc_dom_probe_elf_kernel(struct xc_dom_image *dom)
{
return check_elf_kernel(dom, 0);
}
static int xc_dom_load_elf_symtab(struct xc_dom_image *dom,
struct elf_binary *elf, int load)
{
struct elf_binary syms;
const elf_shdr *shdr, *shdr2;
xen_vaddr_t symtab, maxaddr;
char *hdr;
size_t size;
int h, count, type, i, tables = 0;
if (elf_swap(elf)) {
xc_dom_printf("%s: non-native byte order, bsd symtab not supported\n",
__FUNCTION__);
return 0;
}
if (load) {
if (!dom->bsd_symtab_start)
return 0;
size = dom->kernel_seg.vend - dom->bsd_symtab_start;
hdr = xc_dom_vaddr_to_ptr(dom, dom->bsd_symtab_start);
*(int *)hdr = size - sizeof(int);
} else {
size = sizeof(int) + elf_size(elf, elf->ehdr) +
elf_shdr_count(elf) * elf_size(elf, shdr);
hdr = xc_dom_malloc(dom, size);
if (hdr == NULL)
return 0;
dom->bsd_symtab_start = elf_round_up(&syms, dom->kernel_seg.vend);
}
memcpy(hdr + sizeof(int),
elf->image,
elf_size(elf, elf->ehdr));
memcpy(hdr + sizeof(int) + elf_size(elf, elf->ehdr),
elf->image + elf_uval(elf, elf->ehdr, e_shoff),
elf_shdr_count(elf) * elf_size(elf, shdr));
if (elf_64bit(elf)) {
Elf64_Ehdr *ehdr = (Elf64_Ehdr *)(hdr + sizeof(int));
ehdr->e_phoff = 0;
ehdr->e_phentsize = 0;
ehdr->e_phnum = 0;
ehdr->e_shoff = elf_size(elf, elf->ehdr);
ehdr->e_shstrndx = SHN_UNDEF;
} else {
Elf32_Ehdr *ehdr = (Elf32_Ehdr *)(hdr + sizeof(int));
ehdr->e_phoff = 0;
ehdr->e_phentsize = 0;
ehdr->e_phnum = 0;
ehdr->e_shoff = elf_size(elf, elf->ehdr);
ehdr->e_shstrndx = SHN_UNDEF;
}
if (0 != elf_init(&syms, hdr + sizeof(int), size - sizeof(int)))
return -1;
if (xc_dom_logfile)
elf_set_logfile(&syms, xc_dom_logfile, 1);
symtab = dom->bsd_symtab_start + sizeof(int);
maxaddr = elf_round_up(&syms, symtab + elf_size(&syms, syms.ehdr) +
elf_shdr_count(&syms) * elf_size(&syms, shdr));
xc_dom_printf("%s/%s: bsd_symtab_start=%" PRIx64 ", kernel.end=0x%" PRIx64
" -- symtab=0x%" PRIx64 ", maxaddr=0x%" PRIx64 "\n",
__FUNCTION__, load ? "load" : "parse",
dom->bsd_symtab_start, dom->kernel_seg.vend, symtab, maxaddr);
count = elf_shdr_count(&syms);
for (h = 0; h < count; h++)
{
shdr = elf_shdr_by_index(&syms, h);
type = elf_uval(&syms, shdr, sh_type);
if (type == SHT_STRTAB)
{
/* Look for a strtab @i linked to symtab @h. */
for (i = 0; i < count; i++) {
shdr2 = elf_shdr_by_index(&syms, i);
if ((elf_uval(&syms, shdr2, sh_type) == SHT_SYMTAB) &&
(elf_uval(&syms, shdr2, sh_link) == h))
break;
}
/* Skip symtab @h if we found no corresponding strtab @i. */
if (i == count)
{
if (elf_64bit(&syms))
*(Elf64_Off*)(&shdr->e64.sh_offset) = 0;
else
*(Elf32_Off*)(&shdr->e32.sh_offset) = 0;
continue;
}
}
if ((type == SHT_STRTAB) || (type == SHT_SYMTAB))
{
/* Mangled to be based on ELF header location. */
if (elf_64bit(&syms))
*(Elf64_Off*)(&shdr->e64.sh_offset) = maxaddr - symtab;
else
*(Elf32_Off*)(&shdr->e32.sh_offset) = maxaddr - symtab;
size = elf_uval(&syms, shdr, sh_size);
maxaddr = elf_round_up(&syms, maxaddr + size);
tables++;
xc_dom_printf("%s: h=%d %s, size=0x%zx, maxaddr=0x%" PRIx64 "\n",
__FUNCTION__, h,
type == SHT_SYMTAB ? "symtab" : "strtab",
size, maxaddr);
if (load) {
shdr2 = elf_shdr_by_index(elf, h);
memcpy((void*)elf_section_start(&syms, shdr),
elf_section_start(elf, shdr2),
size);
}
}
/* Name is NULL. */
if (elf_64bit(&syms))
*(Elf64_Half*)(&shdr->e64.sh_name) = 0;
else
*(Elf32_Word*)(&shdr->e32.sh_name) = 0;
}
if (0 == tables)
{
xc_dom_printf("%s: no symbol table present\n", __FUNCTION__);
dom->bsd_symtab_start = 0;
return 0;
}
if (!load)
dom->kernel_seg.vend = maxaddr;
return 0;
}
static int xc_dom_parse_elf_kernel(struct xc_dom_image *dom)
{
struct elf_binary *elf;
int rc;
rc = check_elf_kernel(dom, 1);
if (0 != rc)
return rc;
elf = xc_dom_malloc(dom, sizeof(*elf));
dom->private_loader = elf;
rc = elf_init(elf, dom->kernel_blob, dom->kernel_size);
if (xc_dom_logfile)
elf_set_logfile(elf, xc_dom_logfile, 1);
if (0 != rc)
{
xc_dom_panic(XC_INVALID_KERNEL, "%s: corrupted ELF image\n",
__FUNCTION__);
return rc;
}
/* Find the section-header strings table. */
if (NULL == elf->sec_strtab)
{
xc_dom_panic(XC_INVALID_KERNEL, "%s: ELF image has no shstrtab\n",
__FUNCTION__);
return -EINVAL;
}
/* parse binary and get xen meta info */
elf_parse_binary(elf);
if (0 != (rc = elf_xen_parse(elf, &dom->parms)))
return rc;
/* find kernel segment */
dom->kernel_seg.vstart = dom->parms.virt_kstart;
dom->kernel_seg.vend = dom->parms.virt_kend;
if (dom->parms.bsd_symtab)
xc_dom_load_elf_symtab(dom, elf, 0);
dom->guest_type = xc_dom_guest_type(dom, elf);
xc_dom_printf("%s: %s: 0x%" PRIx64 " -> 0x%" PRIx64 "\n",
__FUNCTION__, dom->guest_type,
dom->kernel_seg.vstart, dom->kernel_seg.vend);
return 0;
}
static int xc_dom_load_elf_kernel(struct xc_dom_image *dom)
{
struct elf_binary *elf = dom->private_loader;
elf->dest = xc_dom_seg_to_ptr(dom, &dom->kernel_seg);
elf_load_binary(elf);
if (dom->parms.bsd_symtab)
xc_dom_load_elf_symtab(dom, elf, 1);
return 0;
}
/* ------------------------------------------------------------------------ */
static struct xc_dom_loader elf_loader = {
.name = "ELF-generic",
.probe = xc_dom_probe_elf_kernel,
.parser = xc_dom_parse_elf_kernel,
.loader = xc_dom_load_elf_kernel,
};
static void __init register_loader(void)
{
xc_dom_register_loader(&elf_loader);
}
tools/libxc/xc_dom_ia64.c
+118
View File
@@ -0,0 +1,118 @@
/*
* Xen domain builder -- ia64 bits.
*
* Most architecture-specific code for ia64 goes here.
* - fill architecture-specific structs.
*
* This code is licenced under the GPL.
* written 2006 by Gerd Hoffmann <kraxel@suse.de>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <xen/xen.h>
#include <xen/foreign/ia64.h>
#include "xg_private.h"
#include "xc_dom.h"
/* ------------------------------------------------------------------------ */
static int alloc_magic_pages(struct xc_dom_image *dom)
{
/* allocate special pages */
dom->console_pfn = dom->total_pages -1;
dom->xenstore_pfn = dom->total_pages -2;
dom->start_info_pfn = dom->total_pages -3;
return 0;
}
static int start_info_ia64(struct xc_dom_image *dom)
{
start_info_ia64_t *start_info =
xc_dom_pfn_to_ptr(dom, dom->start_info_pfn, 1);
struct xen_ia64_boot_param_ia64 *bp =
(struct xen_ia64_boot_param_ia64 *)(start_info + 1);
xc_dom_printf("%s\n", __FUNCTION__);
sprintf(start_info->magic, dom->guest_type);
start_info->flags = dom->flags;
start_info->nr_pages = dom->total_pages;
start_info->store_mfn = dom->xenstore_pfn;
start_info->store_evtchn = dom->xenstore_evtchn;
start_info->console.domU.mfn = dom->console_pfn;
start_info->console.domU.evtchn = dom->console_evtchn;
if (dom->ramdisk_blob)
{
start_info->mod_start = dom->ramdisk_seg.vstart;
start_info->mod_len = dom->ramdisk_seg.vend - dom->ramdisk_seg.vstart;
bp->initrd_start = start_info->mod_start;
bp->initrd_size = start_info->mod_len;
}
if (dom->cmdline)
{
strncpy((char *)start_info->cmd_line, dom->cmdline, MAX_GUEST_CMDLINE);
start_info->cmd_line[MAX_GUEST_CMDLINE - 1] = '\0';
bp->command_line = (dom->start_info_pfn << PAGE_SHIFT_IA64)
+ offsetof(start_info_t, cmd_line);
}
return 0;
}
static int shared_info_ia64(struct xc_dom_image *dom, void *ptr)
{
shared_info_ia64_t *shared_info = ptr;
int i;
xc_dom_printf("%s: called\n", __FUNCTION__);
memset(shared_info, 0, sizeof(*shared_info));
for (i = 0; i < MAX_VIRT_CPUS; i++)
shared_info->vcpu_info[i].evtchn_upcall_mask = 1;
shared_info->arch.start_info_pfn = dom->start_info_pfn;
return 0;
}
extern unsigned long xc_ia64_fpsr_default(void);
static int vcpu_ia64(struct xc_dom_image *dom, void *ptr)
{
vcpu_guest_context_ia64_t *ctxt = ptr;
xc_dom_printf("%s: called\n", __FUNCTION__);
/* clear everything */
memset(ctxt, 0, sizeof(*ctxt));
ctxt->flags = 0;
ctxt->user_regs.cr_ipsr = 0; /* all necessary bits filled by hypervisor */
ctxt->user_regs.cr_iip = dom->parms.virt_entry;
ctxt->user_regs.cr_ifs = (uint64_t) 1 << 63;
#ifdef __ia64__ /* FIXME */
ctxt->user_regs.ar_fpsr = xc_ia64_fpsr_default();
#endif
ctxt->user_regs.r28 = (dom->start_info_pfn << PAGE_SHIFT_IA64)
+ sizeof(start_info_ia64_t);
return 0;
}
/* ------------------------------------------------------------------------ */
static struct xc_dom_arch xc_dom_arch = {
.guest_type = "xen-3.0-ia64",
.page_shift = PAGE_SHIFT_IA64,
.alloc_magic_pages = alloc_magic_pages,
.start_info = start_info_ia64,
.shared_info = shared_info_ia64,
.vcpu = vcpu_ia64,
};
static void __init register_arch_hooks(void)
{
xc_dom_register_arch_hooks(&xc_dom_arch);
}
tools/libxc/xc_dom_powerpc64.c
+100
View File
@@ -0,0 +1,100 @@
/*
* Xen domain builder -- ia64 bits.
*
* Most architecture-specific code for ia64 goes here.
* - fill architecture-specific structs.
*
* This code is licenced under the GPL.
* written 2006 by Gerd Hoffmann <kraxel@suse.de>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <xen/xen.h>
#include "xg_private.h"
#include "xc_dom.h"
/* ------------------------------------------------------------------------ */
static int alloc_magic_pages(struct xc_dom_image *dom)
{
/* allocate special pages */
dom->low_top--; /* shared_info */
dom->xenstore_pfn = --dom->low_top;
dom->console_pfn = --dom->low_top;
dom->start_info_pfn = --dom->low_top;
return 0;
}
static int start_info(struct xc_dom_image *dom)
{
start_info_t *si =
xc_dom_pfn_to_ptr(dom, dom->start_info_pfn, 1);
xc_dom_printf("%s\n", __FUNCTION__);
snprintf(si->magic, sizeof(si->magic), "xen-%d.%d-powerpc64HV", 3, 0);
si->nr_pages = dom->total_pages;
si->shared_info = (dom->total_pages - 1) << PAGE_SHIFT;
si->store_mfn = dom->xenstore_pfn;
si->store_evtchn = dom->store_evtchn;
si->console.domU.mfn = dom->console_pfn;
si->console.domU.evtchn = dom->console_evtchn;
return 0;
}
static int shared_info(struct xc_dom_image *dom, void *ptr)
{
shared_info_t *shared_info = ptr;
int i;
xc_dom_printf("%s: called\n", __FUNCTION__);
memset(shared_info, 0, sizeof(*shared_info));
return 0;
}
static int vcpu(struct xc_dom_image *dom, void *ptr)
{
vcpu_guest_context_t *ctxt = ptr;
xc_dom_printf("%s: called\n", __FUNCTION__);
/* clear everything */
memset(ctxt, 0, sizeof(*ctxt));
memset(&ctxt->user_regs, 0x55, sizeof(ctxt.user_regs));
ctxt->user_regs.pc = dsi->v_kernentry;
ctxt->user_regs.msr = 0;
ctxt->user_regs.gprs[1] = 0; /* Linux uses its own stack */
ctxt->user_regs.gprs[3] = devtree_addr;
ctxt->user_regs.gprs[4] = kern_addr;
ctxt->user_regs.gprs[5] = 0;
/* There is a buggy kernel that does not zero the "local_paca", so
* we must make sure this register is 0 */
ctxt->user_regs.gprs[13] = 0;
return 0;
}
/* ------------------------------------------------------------------------ */
static struct xc_dom_arch xc_dom_arch = {
.guest_type = "xen-3.0-powerpc64",
.page_shift = FIXME,
.alloc_magic_pages = alloc_magic_pages,
.start_info = start_info,
.shared_info = shared_info,
.vcpu = vcpu,
};
static void __init register_arch_hooks(void)
{
xc_dom_register_arch_hooks(&xc_dom_arch);
}
tools/libxc/xc_dom_x86.c
+559
View File
@@ -0,0 +1,559 @@
/*
* Xen domain builder -- i386 and x86_64 bits.
*
* Most architecture-specific code for x86 goes here.
* - prepare page tables.
* - fill architecture-specific structs.
*
* This code is licenced under the GPL.
* written 2006 by Gerd Hoffmann <kraxel@suse.de>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <xen/xen.h>
#include <xen/foreign/x86_32.h>
#include <xen/foreign/x86_64.h>
#include <xen/hvm/hvm_info_table.h>
#include <xen/hvm/e820.h>
#include "xg_private.h"
#include "xc_dom.h"
/* ------------------------------------------------------------------------ */
#define bits_to_mask(bits) (((xen_vaddr_t)1 << (bits))-1)
#define round_down(addr, mask) ((addr) & ~(mask))
#define round_up(addr, mask) ((addr) | (mask))
static inline unsigned long
nr_page_tables(xen_vaddr_t start, xen_vaddr_t end, unsigned long bits)
{
xen_vaddr_t mask = bits_to_mask(bits);
int tables;
if (0 == bits)
return 0; /* unused */
if (8 * sizeof(unsigned long) == bits)
{
/* must be pgd, need one */
start = 0;
end = -1;
tables = 1;
}
else
{
start = round_down(start, mask);
end = round_up(end, mask);
tables = ((end - start) >> bits) + 1;
}
xc_dom_printf("%s: 0x%016" PRIx64 "/%ld: 0x%016" PRIx64
" -> 0x%016" PRIx64 ", %d table(s)\n",
__FUNCTION__, mask, bits, start, end, tables);
return tables;
}
static int count_pgtables(struct xc_dom_image *dom, int pae,
int l4_bits, int l3_bits, int l2_bits, int l1_bits)
{
int pages, extra_pages;
xen_vaddr_t try_virt_end;
extra_pages = dom->alloc_bootstack ? 1 : 0;
extra_pages += dom->extra_pages;
pages = extra_pages;
for (;;)
{
try_virt_end = round_up(dom->virt_alloc_end + pages * PAGE_SIZE_X86,
bits_to_mask(l1_bits));
dom->pg_l4 =
nr_page_tables(dom->parms.virt_base, try_virt_end, l4_bits);
dom->pg_l3 =
nr_page_tables(dom->parms.virt_base, try_virt_end, l3_bits);
dom->pg_l2 =
nr_page_tables(dom->parms.virt_base, try_virt_end, l2_bits);
dom->pg_l1 =
nr_page_tables(dom->parms.virt_base, try_virt_end, l1_bits);
if (pae && try_virt_end < 0xc0000000)
{
xc_dom_printf("%s: PAE: extra l2 page table for l3#3\n", __FUNCTION__);
dom->pg_l2++;
}
dom->pgtables = dom->pg_l4 + dom->pg_l3 + dom->pg_l2 + dom->pg_l1;
pages = dom->pgtables + extra_pages;
if (dom->virt_alloc_end + pages * PAGE_SIZE_X86 <= try_virt_end + 1)
break;
}
dom->virt_pgtab_end = try_virt_end + 1;
return 0;
}
/* ------------------------------------------------------------------------ */
/* i386 pagetables */
#define L1_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED)
#define L2_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
#define L3_PROT (_PAGE_PRESENT)
static int count_pgtables_x86_32(struct xc_dom_image *dom)
{
return count_pgtables(dom, 0, 0, 0, 32, L2_PAGETABLE_SHIFT_I386);
}
static int count_pgtables_x86_32_pae(struct xc_dom_image *dom)
{
return count_pgtables(dom, 1, 0, 32,
L3_PAGETABLE_SHIFT_PAE, L2_PAGETABLE_SHIFT_PAE);
}
#define pfn_to_paddr(pfn) ((xen_paddr_t)(pfn) << PAGE_SHIFT_X86)
static int setup_pgtables_x86_32(struct xc_dom_image *dom)
{
xen_pfn_t l2pfn = dom->pgtables_seg.pfn;
xen_pfn_t l1pfn = dom->pgtables_seg.pfn + dom->pg_l2;
l2_pgentry_32_t *l2tab = xc_dom_pfn_to_ptr(dom, l2pfn, 1);
l1_pgentry_32_t *l1tab = NULL;
unsigned long l2off, l1off;
xen_vaddr_t addr;
xen_pfn_t pgpfn;
for (addr = dom->parms.virt_base; addr < dom->virt_pgtab_end;
addr += PAGE_SIZE_X86)
{
if (NULL == l1tab)
{
/* get L1 tab, make L2 entry */
l1tab = xc_dom_pfn_to_ptr(dom, l1pfn, 1);
l2off = l2_table_offset_i386(addr);
l2tab[l2off] =
pfn_to_paddr(xc_dom_p2m_guest(dom, l1pfn)) | L2_PROT;
l1pfn++;
}
/* make L1 entry */
l1off = l1_table_offset_i386(addr);
pgpfn = (addr - dom->parms.virt_base) >> PAGE_SHIFT_X86;
l1tab[l1off] =
pfn_to_paddr(xc_dom_p2m_guest(dom, pgpfn)) | L1_PROT;
if (addr >= dom->pgtables_seg.vstart && addr < dom->pgtables_seg.vend)
l1tab[l1off] &= ~_PAGE_RW; /* page tables are r/o */
if (L1_PAGETABLE_ENTRIES_I386 - 1 == l1off)
l1tab = NULL;
}
return 0;
}
static int setup_pgtables_x86_32_pae(struct xc_dom_image *dom)
{
xen_pfn_t l3pfn = dom->pgtables_seg.pfn;
xen_pfn_t l2pfn = dom->pgtables_seg.pfn + dom->pg_l3;
xen_pfn_t l1pfn = dom->pgtables_seg.pfn + dom->pg_l3 + dom->pg_l2;
l3_pgentry_64_t *l3tab = xc_dom_pfn_to_ptr(dom, l3pfn, 1);
l2_pgentry_64_t *l2tab = NULL;
l1_pgentry_64_t *l1tab = NULL;
unsigned long l3off, l2off, l1off;
xen_vaddr_t addr;
xen_pfn_t pgpfn;
for (addr = dom->parms.virt_base; addr < dom->virt_pgtab_end;
addr += PAGE_SIZE_X86)
{
if (NULL == l2tab)
{
/* get L2 tab, make L3 entry */
l2tab = xc_dom_pfn_to_ptr(dom, l2pfn, 1);
l3off = l3_table_offset_pae(addr);
l3tab[l3off] =
pfn_to_paddr(xc_dom_p2m_guest(dom, l2pfn)) | L3_PROT;
l2pfn++;
}
if (NULL == l1tab)
{
/* get L1 tab, make L2 entry */
l1tab = xc_dom_pfn_to_ptr(dom, l1pfn, 1);
l2off = l2_table_offset_pae(addr);
l2tab[l2off] =
pfn_to_paddr(xc_dom_p2m_guest(dom, l1pfn)) | L2_PROT;
if (L2_PAGETABLE_ENTRIES_PAE - 1 == l2off)
l2tab = NULL;
l1pfn++;
}
/* make L1 entry */
l1off = l1_table_offset_pae(addr);
pgpfn = (addr - dom->parms.virt_base) >> PAGE_SHIFT_X86;
l1tab[l1off] =
pfn_to_paddr(xc_dom_p2m_guest(dom, pgpfn)) | L1_PROT;
if (addr >= dom->pgtables_seg.vstart && addr < dom->pgtables_seg.vend)
l1tab[l1off] &= ~_PAGE_RW; /* page tables are r/o */
if (L1_PAGETABLE_ENTRIES_PAE - 1 == l1off)
l1tab = NULL;
}
if (dom->virt_pgtab_end <= 0xc0000000)
{
xc_dom_printf("%s: PAE: extra l2 page table for l3#3\n", __FUNCTION__);
l3tab[3] = pfn_to_paddr(xc_dom_p2m_guest(dom, l2pfn)) | L3_PROT;
}
return 0;
}
#undef L1_PROT
#undef L2_PROT
#undef L3_PROT
/* ------------------------------------------------------------------------ */
/* x86_64 pagetables */
static int count_pgtables_x86_64(struct xc_dom_image *dom)
{
return count_pgtables(dom, 0,
L4_PAGETABLE_SHIFT_X86_64 + 9,
L4_PAGETABLE_SHIFT_X86_64,
L3_PAGETABLE_SHIFT_X86_64, L2_PAGETABLE_SHIFT_X86_64);
}
#define L1_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED)
#define L2_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
#define L3_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
#define L4_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
static int setup_pgtables_x86_64(struct xc_dom_image *dom)
{
xen_pfn_t l4pfn = dom->pgtables_seg.pfn;
xen_pfn_t l3pfn = dom->pgtables_seg.pfn + dom->pg_l4;
xen_pfn_t l2pfn = dom->pgtables_seg.pfn + dom->pg_l4 + dom->pg_l3;
xen_pfn_t l1pfn =
dom->pgtables_seg.pfn + dom->pg_l4 + dom->pg_l3 + dom->pg_l2;
l4_pgentry_64_t *l4tab = xc_dom_pfn_to_ptr(dom, l4pfn, 1);
l3_pgentry_64_t *l3tab = NULL;
l2_pgentry_64_t *l2tab = NULL;
l1_pgentry_64_t *l1tab = NULL;
uint64_t l4off, l3off, l2off, l1off;
uint64_t addr;
xen_pfn_t pgpfn;
for (addr = dom->parms.virt_base; addr < dom->virt_pgtab_end;
addr += PAGE_SIZE_X86)
{
if (NULL == l3tab)
{
/* get L3 tab, make L4 entry */
l3tab = xc_dom_pfn_to_ptr(dom, l3pfn, 1);
l4off = l4_table_offset_x86_64(addr);
l4tab[l4off] =
pfn_to_paddr(xc_dom_p2m_guest(dom, l3pfn)) | L4_PROT;
l3pfn++;
}
if (NULL == l2tab)
{
/* get L2 tab, make L3 entry */
l2tab = xc_dom_pfn_to_ptr(dom, l2pfn, 1);
l3off = l3_table_offset_x86_64(addr);
l3tab[l3off] =
pfn_to_paddr(xc_dom_p2m_guest(dom, l2pfn)) | L3_PROT;
if (L3_PAGETABLE_ENTRIES_X86_64 - 1 == l3off)
l3tab = NULL;
l2pfn++;
}
if (NULL == l1tab)
{
/* get L1 tab, make L2 entry */
l1tab = xc_dom_pfn_to_ptr(dom, l1pfn, 1);
l2off = l2_table_offset_x86_64(addr);
l2tab[l2off] =
pfn_to_paddr(xc_dom_p2m_guest(dom, l1pfn)) | L2_PROT;
if (L2_PAGETABLE_ENTRIES_X86_64 - 1 == l2off)
l2tab = NULL;
l1pfn++;
}
/* make L1 entry */
l1off = l1_table_offset_x86_64(addr);
pgpfn = (addr - dom->parms.virt_base) >> PAGE_SHIFT_X86;
l1tab[l1off] =
pfn_to_paddr(xc_dom_p2m_guest(dom, pgpfn)) | L1_PROT;
if (addr >= dom->pgtables_seg.vstart && addr < dom->pgtables_seg.vend)
l1tab[l1off] &= ~_PAGE_RW; /* page tables are r/o */
if (L1_PAGETABLE_ENTRIES_X86_64 - 1 == l1off)
l1tab = NULL;
}
return 0;
}
#undef L1_PROT
#undef L2_PROT
#undef L3_PROT
#undef L4_PROT
/* ------------------------------------------------------------------------ */
static int alloc_magic_pages(struct xc_dom_image *dom)
{
size_t p2m_size = dom->total_pages * dom->arch_hooks->sizeof_pfn;
/* allocate phys2mach table */
if (0 != xc_dom_alloc_segment(dom, &dom->p2m_seg, "phys2mach", 0, p2m_size))
return -1;
dom->p2m_guest = xc_dom_seg_to_ptr(dom, &dom->p2m_seg);
/* allocate special pages */
dom->start_info_pfn = xc_dom_alloc_page(dom, "start info");
dom->xenstore_pfn = xc_dom_alloc_page(dom, "xenstore");
dom->console_pfn = xc_dom_alloc_page(dom, "console");
if (xc_dom_feature_translated(dom))
dom->shared_info_pfn = xc_dom_alloc_page(dom, "shared info");
dom->alloc_bootstack = 1;
return 0;
}
/* ------------------------------------------------------------------------ */
static int start_info_x86_32(struct xc_dom_image *dom)
{
start_info_x86_32_t *start_info =
xc_dom_pfn_to_ptr(dom, dom->start_info_pfn, 1);
xen_pfn_t shinfo =
xc_dom_feature_translated(dom) ? dom->shared_info_pfn : dom->
shared_info_mfn;
xc_dom_printf("%s: called\n", __FUNCTION__);
sprintf(start_info->magic, dom->guest_type);
start_info->nr_pages = dom->total_pages;
start_info->shared_info = shinfo << PAGE_SHIFT_X86;
start_info->pt_base = dom->pgtables_seg.vstart;
start_info->nr_pt_frames = dom->pgtables;
start_info->mfn_list = dom->p2m_seg.vstart;
start_info->flags = dom->flags;
start_info->store_mfn = xc_dom_p2m_guest(dom, dom->xenstore_pfn);
start_info->store_evtchn = dom->xenstore_evtchn;
start_info->console.domU.mfn = xc_dom_p2m_guest(dom, dom->console_pfn);
start_info->console.domU.evtchn = dom->console_evtchn;
if (dom->ramdisk_blob)
{
start_info->mod_start = dom->ramdisk_seg.vstart;
start_info->mod_len = dom->ramdisk_seg.vend - dom->ramdisk_seg.vstart;
}
if (dom->cmdline)
{
strncpy((char *)start_info->cmd_line, dom->cmdline, MAX_GUEST_CMDLINE);
start_info->cmd_line[MAX_GUEST_CMDLINE - 1] = '\0';
}
return 0;
}
static int start_info_x86_64(struct xc_dom_image *dom)
{
start_info_x86_64_t *start_info =
xc_dom_pfn_to_ptr(dom, dom->start_info_pfn, 1);
xen_pfn_t shinfo =
xc_dom_feature_translated(dom) ? dom->shared_info_pfn : dom->
shared_info_mfn;
xc_dom_printf("%s: called\n", __FUNCTION__);
sprintf(start_info->magic, dom->guest_type);
start_info->nr_pages = dom->total_pages;
start_info->shared_info = shinfo << PAGE_SHIFT_X86;
start_info->pt_base = dom->pgtables_seg.vstart;
start_info->nr_pt_frames = dom->pgtables;
start_info->mfn_list = dom->p2m_seg.vstart;
start_info->flags = dom->flags;
start_info->store_mfn = xc_dom_p2m_guest(dom, dom->xenstore_pfn);
start_info->store_evtchn = dom->xenstore_evtchn;
start_info->console.domU.mfn = xc_dom_p2m_guest(dom, dom->console_pfn);
start_info->console.domU.evtchn = dom->console_evtchn;
if (dom->ramdisk_blob)
{
start_info->mod_start = dom->ramdisk_seg.vstart;
start_info->mod_len = dom->ramdisk_seg.vend - dom->ramdisk_seg.vstart;
}
if (dom->cmdline)
{
strncpy((char *)start_info->cmd_line, dom->cmdline, MAX_GUEST_CMDLINE);
start_info->cmd_line[MAX_GUEST_CMDLINE - 1] = '\0';
}
return 0;
}
static int shared_info_x86_32(struct xc_dom_image *dom, void *ptr)
{
shared_info_x86_32_t *shared_info = ptr;
int i;
xc_dom_printf("%s: called\n", __FUNCTION__);
memset(shared_info, 0, sizeof(*shared_info));
for (i = 0; i < MAX_VIRT_CPUS; i++)
shared_info->vcpu_info[i].evtchn_upcall_mask = 1;
return 0;
}
static int shared_info_x86_64(struct xc_dom_image *dom, void *ptr)
{
shared_info_x86_64_t *shared_info = ptr;
int i;
xc_dom_printf("%s: called\n", __FUNCTION__);
memset(shared_info, 0, sizeof(*shared_info));
for (i = 0; i < MAX_VIRT_CPUS; i++)
shared_info->vcpu_info[i].evtchn_upcall_mask = 1;
return 0;
}
/* ------------------------------------------------------------------------ */
static int vcpu_x86_32(struct xc_dom_image *dom, void *ptr)
{
vcpu_guest_context_x86_32_t *ctxt = ptr;
xen_pfn_t cr3_pfn;
int i;
xc_dom_printf("%s: called\n", __FUNCTION__);
/* clear everything */
memset(ctxt, 0, sizeof(*ctxt));
/* Virtual IDT is empty at start-of-day. */
for (i = 0; i < 256; i++)
{
ctxt->trap_ctxt[i].vector = i;
ctxt->trap_ctxt[i].cs = FLAT_KERNEL_CS_X86_32;
}
/* No callback handlers. */
ctxt->event_callback_cs = FLAT_KERNEL_CS_X86_32;
ctxt->failsafe_callback_cs = FLAT_KERNEL_CS_X86_32;
ctxt->user_regs.ds = FLAT_KERNEL_DS_X86_32;
ctxt->user_regs.es = FLAT_KERNEL_DS_X86_32;
ctxt->user_regs.fs = FLAT_KERNEL_DS_X86_32;
ctxt->user_regs.gs = FLAT_KERNEL_DS_X86_32;
ctxt->user_regs.ss = FLAT_KERNEL_SS_X86_32;
ctxt->user_regs.cs = FLAT_KERNEL_CS_X86_32;
ctxt->user_regs.eip = dom->parms.virt_entry;
ctxt->user_regs.esp =
dom->parms.virt_base + (dom->bootstack_pfn + 1) * PAGE_SIZE_X86;
ctxt->user_regs.esi =
dom->parms.virt_base + (dom->start_info_pfn) * PAGE_SIZE_X86;
ctxt->user_regs.eflags = 1 << 9; /* Interrupt Enable */
ctxt->kernel_ss = FLAT_KERNEL_SS_X86_32;
ctxt->kernel_sp =
dom->parms.virt_base + (dom->bootstack_pfn + 1) * PAGE_SIZE_X86;
ctxt->flags = VGCF_in_kernel_X86_32;
if (dom->parms.pae == 2 /* extended_cr3 */ ||
dom->parms.pae == 3 /* bimodal */)
ctxt->vm_assist |= (1UL << VMASST_TYPE_pae_extended_cr3);
cr3_pfn = xc_dom_p2m_guest(dom, dom->pgtables_seg.pfn);
ctxt->ctrlreg[3] = xen_pfn_to_cr3_x86_32(cr3_pfn);
xc_dom_printf("%s: cr3: pfn 0x%" PRIpfn " mfn 0x%" PRIpfn "\n",
__FUNCTION__, dom->pgtables_seg.pfn, cr3_pfn);
return 0;
}
static int vcpu_x86_64(struct xc_dom_image *dom, void *ptr)
{
vcpu_guest_context_x86_64_t *ctxt = ptr;
xen_pfn_t cr3_pfn;
int i;
xc_dom_printf("%s: called\n", __FUNCTION__);
/* clear everything */
memset(ctxt, 0, sizeof(*ctxt));
/* Virtual IDT is empty at start-of-day. */
for (i = 0; i < 256; i++)
{
ctxt->trap_ctxt[i].vector = i;
ctxt->trap_ctxt[i].cs = FLAT_KERNEL_CS_X86_64;
}
ctxt->user_regs.ds = FLAT_KERNEL_DS_X86_64;
ctxt->user_regs.es = FLAT_KERNEL_DS_X86_64;
ctxt->user_regs.fs = FLAT_KERNEL_DS_X86_64;
ctxt->user_regs.gs = FLAT_KERNEL_DS_X86_64;
ctxt->user_regs.ss = FLAT_KERNEL_SS_X86_64;
ctxt->user_regs.cs = FLAT_KERNEL_CS_X86_64;
ctxt->user_regs.rip = dom->parms.virt_entry;
ctxt->user_regs.rsp =
dom->parms.virt_base + (dom->bootstack_pfn + 1) * PAGE_SIZE_X86;
ctxt->user_regs.rsi =
dom->parms.virt_base + (dom->start_info_pfn) * PAGE_SIZE_X86;
ctxt->user_regs.rflags = 1 << 9; /* Interrupt Enable */
ctxt->kernel_ss = FLAT_KERNEL_SS_X86_64;
ctxt->kernel_sp =
dom->parms.virt_base + (dom->bootstack_pfn + 1) * PAGE_SIZE_X86;
ctxt->flags = VGCF_in_kernel_X86_64;
cr3_pfn = xc_dom_p2m_guest(dom, dom->pgtables_seg.pfn);
ctxt->ctrlreg[3] = xen_pfn_to_cr3_x86_64(cr3_pfn);
xc_dom_printf("%s: cr3: pfn 0x%" PRIpfn " mfn 0x%" PRIpfn "\n",
__FUNCTION__, dom->pgtables_seg.pfn, cr3_pfn);
return 0;
}
/* ------------------------------------------------------------------------ */
static struct xc_dom_arch xc_dom_32 = {
.guest_type = "xen-3.0-x86_32",
.page_shift = PAGE_SHIFT_X86,
.sizeof_pfn = 4,
.alloc_magic_pages = alloc_magic_pages,
.count_pgtables = count_pgtables_x86_32,
.setup_pgtables = setup_pgtables_x86_32,
.start_info = start_info_x86_32,
.shared_info = shared_info_x86_32,
.vcpu = vcpu_x86_32,
};
static struct xc_dom_arch xc_dom_32_pae = {
.guest_type = "xen-3.0-x86_32p",
.page_shift = PAGE_SHIFT_X86,
.sizeof_pfn = 4,
.alloc_magic_pages = alloc_magic_pages,
.count_pgtables = count_pgtables_x86_32_pae,
.setup_pgtables = setup_pgtables_x86_32_pae,
.start_info = start_info_x86_32,
.shared_info = shared_info_x86_32,
.vcpu = vcpu_x86_32,
};
static struct xc_dom_arch xc_dom_64 = {
.guest_type = "xen-3.0-x86_64",
.page_shift = PAGE_SHIFT_X86,
.sizeof_pfn = 8,
.alloc_magic_pages = alloc_magic_pages,
.count_pgtables = count_pgtables_x86_64,
.setup_pgtables = setup_pgtables_x86_64,
.start_info = start_info_x86_64,
.shared_info = shared_info_x86_64,
.vcpu = vcpu_x86_64,
};
static void __init register_arch_hooks(void)
{
xc_dom_register_arch_hooks(&xc_dom_32);
xc_dom_register_arch_hooks(&xc_dom_32_pae);
xc_dom_register_arch_hooks(&xc_dom_64);
}
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xen-project/xen
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