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f2af2d95f03ae3e24e0403f1e00a9e68decd967d
xen/tools/libxc/xc_dom_x86.c
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Ian Campbell 6993e9f5ce # HG changeset patch 
# User Ian Campbell <ian.campbell@citrix.com>
# Date 1282671421 -3600
# Node ID d1dd29a470ef1b9d2c77478a123326036dfe90bb
# Parent  d7a4adad9c328decbd384d87b23001aea8951b86
tools/libxc, tools/libelf: Relicense under LGPL v2.1

Relicense these two libraries under LGPL v2.1 only except where
individual files already included the "or later" provision.

Copyright holders have been contacted by Stephen Spector and have all
agreed this change.

Removed tools/libxc/ia64/aclinux.h since it appeared to be
unused. There is a separate, more up to date, copy in
xen/include/acpi/platform/aclinux.h which does appear to be used.

Clarify the license of MiniOS privcmd.h under the same terms as other
tools/include/xen-sys headers.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stephen Spector <stephen.spector@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
2010-08-24 18:42:59 +01:00

883 lines
28 KiB
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/*
* Xen domain builder -- i386 and x86_64 bits.
*
* Most architecture-specific code for x86 goes here.
* - prepare page tables.
* - fill architecture-specific structs.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* 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/io/protocols.h>
#include "xg_private.h"
#include "xc_dom.h"
#include "xenctrl.h"
/* ------------------------------------------------------------------------ */
#define SUPERPAGE_PFN_SHIFT 9
#define SUPERPAGE_NR_PFNS (1UL << SUPERPAGE_PFN_SHIFT)
#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 unsigned long
nr_page_tables(struct xc_dom_image *dom,
xen_vaddr_t start, xen_vaddr_t end, unsigned long bits)
{
xen_vaddr_t mask = bits_to_mask(bits);
int tables;
if ( bits == 0 )
return 0; /* unused */
if ( bits == (8 * sizeof(unsigned long)) )
{
/* 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;
}
DOMPRINTF("%s: 0x%016" PRIx64 "/%ld: 0x%016" PRIx64
" -> 0x%016" PRIx64 ", %d table(s)",
__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;
extra_pages += 128; /* 512kB padding */
pages = extra_pages;
for ( ; ; )
{
try_virt_end = round_up(dom->virt_alloc_end + pages * PAGE_SIZE_X86,
bits_to_mask(22)); /* 4MB alignment */
dom->pg_l4 =
nr_page_tables(dom, dom->parms.virt_base, try_virt_end, l4_bits);
dom->pg_l3 =
nr_page_tables(dom, dom->parms.virt_base, try_virt_end, l3_bits);
dom->pg_l2 =
nr_page_tables(dom, dom->parms.virt_base, try_virt_end, l2_bits);
dom->pg_l1 =
nr_page_tables(dom, dom->parms.virt_base, try_virt_end, l1_bits);
if (pae && try_virt_end < 0xc0000000)
{
DOMPRINTF("%s: PAE: extra l2 page table for l3#3",
__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 ( l1tab == NULL )
{
/* 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 ( l1off == (L1_PAGETABLE_ENTRIES_I386 - 1) )
l1tab = NULL;
}
return 0;
}
/*
* Move the l3 page table page below 4G for guests which do not
* support the extended-cr3 format. The l3 is currently empty so we
* do not need to preserve the current contents.
*/
static xen_pfn_t move_l3_below_4G(struct xc_dom_image *dom,
xen_pfn_t l3pfn,
xen_pfn_t l3mfn)
{
xen_pfn_t new_l3mfn;
struct xc_mmu *mmu;
void *l3tab;
mmu = xc_alloc_mmu_updates(dom->xch, dom->guest_domid);
if ( mmu == NULL )
{
DOMPRINTF("%s: failed at %d", __FUNCTION__, __LINE__);
return l3mfn;
}
xc_dom_unmap_one(dom, l3pfn);
new_l3mfn = xc_make_page_below_4G(dom->xch, dom->guest_domid, l3mfn);
if ( !new_l3mfn )
goto out;
dom->p2m_host[l3pfn] = new_l3mfn;
if ( xc_dom_update_guest_p2m(dom) != 0 )
goto out;
if ( xc_add_mmu_update(dom->xch, mmu,
(((unsigned long long)new_l3mfn)
<< XC_DOM_PAGE_SHIFT(dom)) |
MMU_MACHPHYS_UPDATE, l3pfn) )
goto out;
if ( xc_flush_mmu_updates(dom->xch, mmu) )
goto out;
/*
* This ensures that the entire pgtables_seg is mapped by a single
* mmap region. arch_setup_bootlate() relies on this to be able to
* unmap and pin the pagetables.
*/
if ( xc_dom_seg_to_ptr(dom, &dom->pgtables_seg) == NULL )
goto out;
l3tab = xc_dom_pfn_to_ptr(dom, l3pfn, 1);
memset(l3tab, 0, XC_DOM_PAGE_SIZE(dom));
DOMPRINTF("%s: successfully relocated L3 below 4G. "
"(L3 PFN %#"PRIpfn" MFN %#"PRIpfn"=>%#"PRIpfn")",
__FUNCTION__, l3pfn, l3mfn, new_l3mfn);
l3mfn = new_l3mfn;
out:
free(mmu);
return l3mfn;
}
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;
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;
xen_pfn_t l3mfn = xc_dom_p2m_guest(dom, l3pfn);
if ( dom->parms.pae == 1 )
{
if ( l3mfn >= 0x100000 )
l3mfn = move_l3_below_4G(dom, l3pfn, l3mfn);
if ( l3mfn >= 0x100000 )
{
xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,"%s: cannot move L3"
" below 4G. extended-cr3 not supported by guest. "
"(L3 PFN %#"PRIpfn" MFN %#"PRIpfn")",
__FUNCTION__, l3pfn, l3mfn);
return -EINVAL;
}
}
l3tab = xc_dom_pfn_to_ptr(dom, l3pfn, 1);
for ( addr = dom->parms.virt_base; addr < dom->virt_pgtab_end;
addr += PAGE_SIZE_X86 )
{
if ( l2tab == NULL )
{
/* 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 ( l1tab == NULL )
{
/* 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 ( l2off == (L2_PAGETABLE_ENTRIES_PAE - 1) )
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 ( l1off == (L1_PAGETABLE_ENTRIES_PAE - 1) )
l1tab = NULL;
}
if ( dom->virt_pgtab_end <= 0xc0000000 )
{
DOMPRINTF("%s: PAE: extra l2 page table for l3#3", __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 ( l3tab == NULL )
{
/* 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 ( l2tab == NULL )
{
/* 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 ( l3off == (L3_PAGETABLE_ENTRIES_X86_64 - 1) )
l3tab = NULL;
l2pfn++;
}
if ( l1tab == NULL )
{
/* 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 ( l2off == (L2_PAGETABLE_ENTRIES_X86_64 - 1) )
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 ( l1off == (L1_PAGETABLE_ENTRIES_X86_64 - 1) )
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 ( 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;
DOMPRINTF_CALLED(dom->xch);
memset(start_info, 0, sizeof(*start_info));
strncpy(start_info->magic, dom->guest_type, sizeof(start_info->magic));
start_info->magic[sizeof(start_info->magic) - 1] = '\0';
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;
DOMPRINTF_CALLED(dom->xch);
memset(start_info, 0, sizeof(*start_info));
strncpy(start_info->magic, dom->guest_type, sizeof(start_info->magic));
start_info->magic[sizeof(start_info->magic) - 1] = '\0';
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;
DOMPRINTF_CALLED(dom->xch);
memset(shared_info, 0, sizeof(*shared_info));
for ( i = 0; i < XEN_LEGACY_MAX_VCPUS; 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;
DOMPRINTF_CALLED(dom->xch);
memset(shared_info, 0, sizeof(*shared_info));
for ( i = 0; i < XEN_LEGACY_MAX_VCPUS; 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;
DOMPRINTF_CALLED(dom->xch);
/* clear everything */
memset(ctxt, 0, sizeof(*ctxt));
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 = ctxt->user_regs.ss;
ctxt->kernel_sp = ctxt->user_regs.esp;
ctxt->flags = VGCF_in_kernel_X86_32 | VGCF_online_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);
DOMPRINTF("%s: cr3: pfn 0x%" PRIpfn " mfn 0x%" PRIpfn "",
__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;
DOMPRINTF_CALLED(dom->xch);
/* clear everything */
memset(ctxt, 0, sizeof(*ctxt));
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 = ctxt->user_regs.ss;
ctxt->kernel_sp = ctxt->user_regs.esp;
ctxt->flags = VGCF_in_kernel_X86_64 | VGCF_online_X86_64;
cr3_pfn = xc_dom_p2m_guest(dom, dom->pgtables_seg.pfn);
ctxt->ctrlreg[3] = xen_pfn_to_cr3_x86_64(cr3_pfn);
DOMPRINTF("%s: cr3: pfn 0x%" PRIpfn " mfn 0x%" PRIpfn "",
__FUNCTION__, dom->pgtables_seg.pfn, cr3_pfn);
return 0;
}
/* ------------------------------------------------------------------------ */
static struct xc_dom_arch xc_dom_32 = {
.guest_type = "xen-3.0-x86_32",
.native_protocol = XEN_IO_PROTO_ABI_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",
.native_protocol = XEN_IO_PROTO_ABI_X86_32,
.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",
.native_protocol = XEN_IO_PROTO_ABI_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);
}
static int x86_compat(xc_interface *xch, domid_t domid, char *guest_type)
{
static const struct {
char *guest;
uint32_t size;
} types[] = {
{ "xen-3.0-x86_32p", 32 },
{ "xen-3.0-x86_64", 64 },
};
DECLARE_DOMCTL;
int i,rc;
memset(&domctl, 0, sizeof(domctl));
domctl.domain = domid;
domctl.cmd = XEN_DOMCTL_set_address_size;
for ( i = 0; i < sizeof(types)/sizeof(types[0]); i++ )
if ( !strcmp(types[i].guest, guest_type) )
domctl.u.address_size.size = types[i].size;
if ( domctl.u.address_size.size == 0 )
/* nothing to do */
return 0;
xc_dom_printf(xch, "%s: guest %s, address size %" PRId32 "", __FUNCTION__,
guest_type, domctl.u.address_size.size);
rc = do_domctl(xch, &domctl);
if ( rc != 0 )
xc_dom_printf(xch, "%s: warning: failed (rc=%d)",
__FUNCTION__, rc);
return rc;
}
static int x86_shadow(xc_interface *xch, domid_t domid)
{
int rc, mode;
DOMPRINTF_CALLED(xch);
mode = XEN_DOMCTL_SHADOW_ENABLE_REFCOUNT |
XEN_DOMCTL_SHADOW_ENABLE_TRANSLATE;
rc = xc_shadow_control(xch, domid,
XEN_DOMCTL_SHADOW_OP_ENABLE,
NULL, 0, NULL, mode, NULL);
if ( rc != 0 )
{
xc_dom_panic(xch, XC_INTERNAL_ERROR,
"%s: SHADOW_OP_ENABLE (mode=0x%x) failed (rc=%d)",
__FUNCTION__, mode, rc);
return rc;
}
xc_dom_printf(xch, "%s: shadow enabled (mode=0x%x)", __FUNCTION__, mode);
return rc;
}
int arch_setup_meminit(struct xc_dom_image *dom)
{
int rc;
xen_pfn_t pfn, allocsz, i, j, mfn;
rc = x86_compat(dom->xch, dom->guest_domid, dom->guest_type);
if ( rc )
return rc;
if ( xc_dom_feature_translated(dom) )
{
dom->shadow_enabled = 1;
rc = x86_shadow(dom->xch, dom->guest_domid);
if ( rc )
return rc;
}
dom->p2m_host = xc_dom_malloc(dom, sizeof(xen_pfn_t) * dom->total_pages);
if ( dom->superpages )
{
int count = dom->total_pages >> SUPERPAGE_PFN_SHIFT;
xen_pfn_t extents[count];
DOMPRINTF("Populating memory with %d superpages", count);
for ( pfn = 0; pfn < count; pfn++ )
extents[pfn] = pfn << SUPERPAGE_PFN_SHIFT;
rc = xc_domain_memory_populate_physmap(dom->xch, dom->guest_domid,
count, SUPERPAGE_PFN_SHIFT, 0,
extents);
if ( rc )
return rc;
/* Expand the returned mfn into the p2m array */
pfn = 0;
for ( i = 0; i < count; i++ )
{
mfn = extents[i];
for ( j = 0; j < SUPERPAGE_NR_PFNS; j++, pfn++ )
dom->p2m_host[pfn] = mfn + j;
}
}
else
{
/* setup initial p2m */
for ( pfn = 0; pfn < dom->total_pages; pfn++ )
dom->p2m_host[pfn] = pfn;
/* allocate guest memory */
for ( i = rc = allocsz = 0;
(i < dom->total_pages) && !rc;
i += allocsz )
{
allocsz = dom->total_pages - i;
if ( allocsz > 1024*1024 )
allocsz = 1024*1024;
rc = xc_domain_memory_populate_physmap(
dom->xch, dom->guest_domid, allocsz,
0, 0, &dom->p2m_host[i]);
}
}
return rc;
}
int arch_setup_bootearly(struct xc_dom_image *dom)
{
DOMPRINTF("%s: doing nothing", __FUNCTION__);
return 0;
}
int arch_setup_bootlate(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 ( !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->xch, pgd_type,
xc_dom_p2m_host(dom, dom->pgtables_seg.pfn),
dom->guest_domid);
if ( rc != 0 )
{
xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,
"%s: pin_table failed (pfn 0x%" PRIpfn ", rc=%d)",
__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->xch, XENMEM_add_to_physmap, &xatp);
if ( rc != 0 )
{
xc_dom_panic(dom->xch, XC_INTERNAL_ERROR, "%s: mapping"
" shared_info failed (pfn=0x%" PRIpfn ", rc=%d)",
__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->xch, XENMEM_add_to_physmap, &xatp);
if ( rc != 0 )
{
if ( (i > 0) && (errno == EINVAL) )
{
DOMPRINTF("%s: %d grant tables mapped", __FUNCTION__, i);
break;
}
xc_dom_panic(dom->xch, XC_INTERNAL_ERROR,
"%s: mapping grant tables failed " "(pfn=0x%"
PRIpfn ", rc=%d)", __FUNCTION__, xatp.gpfn, rc);
return rc;
}
}
shinfo = dom->shared_info_pfn;
}
/* setup shared_info page */
DOMPRINTF("%s: shared_info: pfn 0x%" PRIpfn ", mfn 0x%" PRIpfn "",
__FUNCTION__, dom->shared_info_pfn, dom->shared_info_mfn);
shared_info = xc_map_foreign_range(dom->xch, dom->guest_domid,
PAGE_SIZE_X86,
PROT_READ | PROT_WRITE,
shinfo);
if ( shared_info == NULL )
return -1;
dom->arch_hooks->shared_info(dom, shared_info);
munmap(shared_info, PAGE_SIZE_X86);
return 0;
}
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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