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fa9ecc30bfbf9ac5ecfc4eb0f0cefbdc50f92f21
xen/tools/libxc/xc_linux_build.c
T
kaf24@firebug.cl.cam.ac.uk b2572e0698 Fix some more pfn/mfn/gmfn/gpfn inconsistencies. Fix some direct 
uses of max_page variable to use the mfn_valid() predicate.

Signed-off-by: Keir Fraser <keir@xensource.com>
2006-02-02 12:18:28 +01:00

1057 lines
34 KiB
C
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/******************************************************************************
* xc_linux_build.c
*/
#include "xg_private.h"
#include "xc_private.h"
#include <xenctrl.h>
#if defined(__i386__)
#define ELFSIZE 32
#endif
#if defined(__x86_64__) || defined(__ia64__)
#define ELFSIZE 64
#endif
#include "xc_elf.h"
#include "xc_aout9.h"
#include <stdlib.h>
#include <unistd.h>
#include <zlib.h>
#if defined(__i386__)
#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)
#endif
#if defined(__x86_64__)
#define L1_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_USER)
#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)
#endif
#ifdef __ia64__
#define get_tot_pages xc_get_max_pages
#else
#define get_tot_pages xc_get_tot_pages
#endif
#define round_pgup(_p) (((_p)+(PAGE_SIZE-1))&PAGE_MASK)
#define round_pgdown(_p) ((_p)&PAGE_MASK)
#ifdef __ia64__
#define probe_aout9(image,image_size,load_funcs) 1
#endif
static int probeimageformat(char *image,
unsigned long image_size,
struct load_funcs *load_funcs)
{
if ( probe_elf(image, image_size, load_funcs) &&
probe_bin(image, image_size, load_funcs) &&
probe_aout9(image, image_size, load_funcs) )
{
ERROR( "Unrecognized image format" );
return -EINVAL;
}
return 0;
}
#define alloc_pt(ltab, vltab, pltab) \
do { \
pltab = ppt_alloc++; \
ltab = (uint64_t)page_array[pltab] << PAGE_SHIFT; \
pltab <<= PAGE_SHIFT; \
if ( vltab != NULL ) \
munmap(vltab, PAGE_SIZE); \
if ( (vltab = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE, \
PROT_READ|PROT_WRITE, \
ltab >> PAGE_SHIFT)) == NULL ) \
goto error_out; \
memset(vltab, 0x0, PAGE_SIZE); \
} while ( 0 )
#if defined(__i386__)
static int setup_pg_tables(int xc_handle, uint32_t dom,
vcpu_guest_context_t *ctxt,
unsigned long dsi_v_start,
unsigned long v_end,
unsigned long *page_array,
unsigned long vpt_start,
unsigned long vpt_end,
unsigned shadow_mode_enabled)
{
l1_pgentry_t *vl1tab=NULL, *vl1e=NULL;
l2_pgentry_t *vl2tab=NULL, *vl2e=NULL;
unsigned long l1tab = 0, pl1tab;
unsigned long l2tab = 0, pl2tab;
unsigned long ppt_alloc;
unsigned long count;
ppt_alloc = (vpt_start - dsi_v_start) >> PAGE_SHIFT;
alloc_pt(l2tab, vl2tab, pl2tab);
vl2e = &vl2tab[l2_table_offset(dsi_v_start)];
if (shadow_mode_enabled)
ctxt->ctrlreg[3] = pl2tab;
else
ctxt->ctrlreg[3] = l2tab;
for ( count = 0; count < ((v_end - dsi_v_start) >> PAGE_SHIFT); count++ )
{
if ( ((unsigned long)vl1e & (PAGE_SIZE-1)) == 0 )
{
alloc_pt(l1tab, vl1tab, pl1tab);
vl1e = &vl1tab[l1_table_offset(dsi_v_start + (count<<PAGE_SHIFT))];
if (shadow_mode_enabled)
*vl2e = pl1tab | L2_PROT;
else
*vl2e = l1tab | L2_PROT;
vl2e++;
}
if ( shadow_mode_enabled )
{
*vl1e = (count << PAGE_SHIFT) | L1_PROT;
}
else
{
*vl1e = (page_array[count] << PAGE_SHIFT) | L1_PROT;
if ( (count >= ((vpt_start-dsi_v_start)>>PAGE_SHIFT)) &&
(count < ((vpt_end -dsi_v_start)>>PAGE_SHIFT)) )
*vl1e &= ~_PAGE_RW;
}
vl1e++;
}
munmap(vl1tab, PAGE_SIZE);
munmap(vl2tab, PAGE_SIZE);
return 0;
error_out:
if (vl1tab)
munmap(vl1tab, PAGE_SIZE);
if (vl2tab)
munmap(vl2tab, PAGE_SIZE);
return -1;
}
static int setup_pg_tables_pae(int xc_handle, uint32_t dom,
vcpu_guest_context_t *ctxt,
unsigned long dsi_v_start,
unsigned long v_end,
unsigned long *page_array,
unsigned long vpt_start,
unsigned long vpt_end,
unsigned shadow_mode_enabled)
{
l1_pgentry_64_t *vl1tab = NULL, *vl1e = NULL;
l2_pgentry_64_t *vl2tab = NULL, *vl2e = NULL;
l3_pgentry_64_t *vl3tab = NULL, *vl3e = NULL;
uint64_t l1tab, l2tab, l3tab, pl1tab, pl2tab, pl3tab;
unsigned long ppt_alloc, count, nmfn;
/* First allocate page for page dir. */
ppt_alloc = (vpt_start - dsi_v_start) >> PAGE_SHIFT;
if ( page_array[ppt_alloc] > 0xfffff )
{
nmfn = xc_make_page_below_4G(xc_handle, dom, page_array[ppt_alloc]);
if ( nmfn == 0 )
{
fprintf(stderr, "Couldn't get a page below 4GB :-(\n");
goto error_out;
}
page_array[ppt_alloc] = nmfn;
}
alloc_pt(l3tab, vl3tab, pl3tab);
vl3e = &vl3tab[l3_table_offset_pae(dsi_v_start)];
if (shadow_mode_enabled)
ctxt->ctrlreg[3] = pl3tab;
else
ctxt->ctrlreg[3] = l3tab;
for ( count = 0; count < ((v_end - dsi_v_start) >> PAGE_SHIFT); count++)
{
if ( !((unsigned long)vl1e & (PAGE_SIZE-1)) )
{
if ( !((unsigned long)vl2e & (PAGE_SIZE-1)) )
{
alloc_pt(l2tab, vl2tab, pl2tab);
vl2e = &vl2tab[l2_table_offset_pae(
dsi_v_start + (count << PAGE_SHIFT))];
if (shadow_mode_enabled)
*vl3e = pl2tab | L3_PROT;
else
*vl3e++ = l2tab | L3_PROT;
}
alloc_pt(l1tab, vl1tab, pl1tab);
vl1e = &vl1tab[l1_table_offset_pae(
dsi_v_start + (count << PAGE_SHIFT))];
if (shadow_mode_enabled)
*vl2e = pl1tab | L2_PROT;
else
*vl2e++ = l1tab | L2_PROT;
}
if ( shadow_mode_enabled )
{
*vl1e = (count << PAGE_SHIFT) | L1_PROT;
}
else
{
*vl1e = ((uint64_t)page_array[count] << PAGE_SHIFT) | L1_PROT;
if ( (count >= ((vpt_start-dsi_v_start)>>PAGE_SHIFT)) &&
(count < ((vpt_end -dsi_v_start)>>PAGE_SHIFT)) )
*vl1e &= ~_PAGE_RW;
}
vl1e++;
}
munmap(vl1tab, PAGE_SIZE);
munmap(vl2tab, PAGE_SIZE);
munmap(vl3tab, PAGE_SIZE);
return 0;
error_out:
if (vl1tab)
munmap(vl1tab, PAGE_SIZE);
if (vl2tab)
munmap(vl2tab, PAGE_SIZE);
if (vl3tab)
munmap(vl3tab, PAGE_SIZE);
return -1;
}
#endif
#if defined(__x86_64__)
static int setup_pg_tables_64(int xc_handle, uint32_t dom,
vcpu_guest_context_t *ctxt,
unsigned long dsi_v_start,
unsigned long v_end,
unsigned long *page_array,
unsigned long vpt_start,
unsigned long vpt_end,
int shadow_mode_enabled)
{
l1_pgentry_t *vl1tab=NULL, *vl1e=NULL;
l2_pgentry_t *vl2tab=NULL, *vl2e=NULL;
l3_pgentry_t *vl3tab=NULL, *vl3e=NULL;
l4_pgentry_t *vl4tab=NULL, *vl4e=NULL;
unsigned long l2tab = 0, pl2tab;
unsigned long l1tab = 0, pl1tab;
unsigned long l3tab = 0, pl3tab;
unsigned long l4tab = 0, pl4tab;
unsigned long ppt_alloc;
unsigned long count;
/* First allocate page for page dir. */
ppt_alloc = (vpt_start - dsi_v_start) >> PAGE_SHIFT;
alloc_pt(l4tab, vl4tab, pl4tab);
vl4e = &vl4tab[l4_table_offset(dsi_v_start)];
if (shadow_mode_enabled)
ctxt->ctrlreg[3] = pl4tab;
else
ctxt->ctrlreg[3] = l4tab;
for ( count = 0; count < ((v_end-dsi_v_start)>>PAGE_SHIFT); count++)
{
if ( !((unsigned long)vl1e & (PAGE_SIZE-1)) )
{
alloc_pt(l1tab, vl1tab, pl1tab);
if ( !((unsigned long)vl2e & (PAGE_SIZE-1)) )
{
alloc_pt(l2tab, vl2tab, pl2tab);
if ( !((unsigned long)vl3e & (PAGE_SIZE-1)) )
{
alloc_pt(l3tab, vl3tab, pl3tab);
vl3e = &vl3tab[l3_table_offset(dsi_v_start + (count<<PAGE_SHIFT))];
if (shadow_mode_enabled)
*vl4e = pl3tab | L4_PROT;
else
*vl4e = l3tab | L4_PROT;
vl4e++;
}
vl2e = &vl2tab[l2_table_offset(dsi_v_start + (count<<PAGE_SHIFT))];
if (shadow_mode_enabled)
*vl3e = pl2tab | L3_PROT;
else
*vl3e = l2tab | L3_PROT;
vl3e++;
}
vl1e = &vl1tab[l1_table_offset(dsi_v_start + (count<<PAGE_SHIFT))];
if (shadow_mode_enabled)
*vl2e = pl1tab | L2_PROT;
else
*vl2e = l1tab | L2_PROT;
vl2e++;
}
if ( shadow_mode_enabled )
{
*vl1e = (count << PAGE_SHIFT) | L1_PROT;
}
else
{
*vl1e = (page_array[count] << PAGE_SHIFT) | L1_PROT;
if ( (count >= ((vpt_start-dsi_v_start)>>PAGE_SHIFT)) &&
(count < ((vpt_end -dsi_v_start)>>PAGE_SHIFT)) )
{
*vl1e &= ~_PAGE_RW;
}
}
vl1e++;
}
munmap(vl1tab, PAGE_SIZE);
munmap(vl2tab, PAGE_SIZE);
munmap(vl3tab, PAGE_SIZE);
munmap(vl4tab, PAGE_SIZE);
return 0;
error_out:
if (vl1tab)
munmap(vl1tab, PAGE_SIZE);
if (vl2tab)
munmap(vl2tab, PAGE_SIZE);
if (vl3tab)
munmap(vl3tab, PAGE_SIZE);
if (vl4tab)
munmap(vl4tab, PAGE_SIZE);
return -1;
}
#endif
#ifdef __ia64__
extern unsigned long xc_ia64_fpsr_default(void);
static int setup_guest(int xc_handle,
uint32_t dom,
char *image, unsigned long image_size,
gzFile initrd_gfd, unsigned long initrd_len,
unsigned long nr_pages,
unsigned long *pvsi, unsigned long *pvke,
unsigned long *pvss, vcpu_guest_context_t *ctxt,
const char *cmdline,
unsigned long shared_info_frame,
unsigned long flags,
unsigned int store_evtchn, unsigned long *store_mfn,
unsigned int console_evtchn, unsigned long *console_mfn)
{
unsigned long *page_array = NULL;
struct load_funcs load_funcs;
struct domain_setup_info dsi;
unsigned long vinitrd_start;
unsigned long vinitrd_end;
unsigned long v_end;
unsigned long start_page, pgnr;
start_info_t *start_info;
int rc;
unsigned long i;
rc = probeimageformat(image, image_size, &load_funcs);
if ( rc != 0 )
goto error_out;
memset(&dsi, 0, sizeof(struct domain_setup_info));
rc = (load_funcs.parseimage)(image, image_size, &dsi);
if ( rc != 0 )
goto error_out;
dsi.v_start = round_pgdown(dsi.v_start);
vinitrd_start = round_pgup(dsi.v_end);
vinitrd_end = vinitrd_start + initrd_len;
v_end = round_pgup(vinitrd_end);
start_page = dsi.v_start >> PAGE_SHIFT;
pgnr = (v_end - dsi.v_start) >> PAGE_SHIFT;
if ( (page_array = malloc(pgnr * sizeof(unsigned long))) == NULL )
{
PERROR("Could not allocate memory");
goto error_out;
}
if ( xc_ia64_get_pfn_list(xc_handle, dom, page_array, start_page, pgnr) != pgnr )
{
PERROR("Could not get the page frame list");
goto error_out;
}
#define _p(a) ((void *) (a))
printf("VIRTUAL MEMORY ARRANGEMENT:\n"
" Loaded kernel: %p->%p\n"
" Init. ramdisk: %p->%p\n"
" TOTAL: %p->%p\n",
_p(dsi.v_kernstart), _p(dsi.v_kernend),
_p(vinitrd_start), _p(vinitrd_end),
_p(dsi.v_start), _p(v_end));
printf(" ENTRY ADDRESS: %p\n", _p(dsi.v_kernentry));
(load_funcs.loadimage)(image, image_size, xc_handle, dom, page_array,
&dsi);
/* Load the initial ramdisk image. */
if ( initrd_len != 0 )
{
for ( i = (vinitrd_start - dsi.v_start);
i < (vinitrd_end - dsi.v_start); i += PAGE_SIZE )
{
char page[PAGE_SIZE];
if ( gzread(initrd_gfd, page, PAGE_SIZE) == -1 )
{
PERROR("Error reading initrd image, could not");
goto error_out;
}
xc_copy_to_domain_page(xc_handle, dom,
page_array[i>>PAGE_SHIFT], page);
}
}
*pvke = dsi.v_kernentry;
/* Now need to retrieve machine pfn for system pages:
* start_info/store/console
*/
pgnr = 3;
if ( xc_ia64_get_pfn_list(xc_handle, dom, page_array,
nr_pages - 3, pgnr) != pgnr )
{
PERROR("Could not get page frame for xenstore");
goto error_out;
}
*store_mfn = page_array[1];
*console_mfn = page_array[2];
printf("store_mfn: 0x%lx, console_mfn: 0x%lx\n",
(uint64_t)store_mfn, (uint64_t)console_mfn);
start_info = xc_map_foreign_range(
xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE, page_array[0]);
memset(start_info, 0, sizeof(*start_info));
rc = xc_version(xc_handle, XENVER_version, NULL);
sprintf(start_info->magic, "xen-%i.%i-ia64", rc >> 16, rc & (0xFFFF));
start_info->flags = flags;
start_info->store_mfn = nr_pages - 2;
start_info->store_evtchn = store_evtchn;
start_info->console_mfn = nr_pages - 1;
start_info->console_evtchn = console_evtchn;
start_info->nr_pages = nr_pages; // FIXME?: nr_pages - 2 ????
if ( initrd_len != 0 )
{
ctxt->initrd.start = vinitrd_start;
ctxt->initrd.size = initrd_len;
}
else
{
ctxt->initrd.start = 0;
ctxt->initrd.size = 0;
}
if ( cmdline != NULL )
{
strncpy((char *)ctxt->cmdline, cmdline, IA64_COMMAND_LINE_SIZE);
ctxt->cmdline[IA64_COMMAND_LINE_SIZE-1] = '\0';
}
munmap(start_info, PAGE_SIZE);
free(page_array);
return 0;
error_out:
free(page_array);
return -1;
}
#else /* x86 */
static int setup_guest(int xc_handle,
uint32_t dom,
char *image, unsigned long image_size,
gzFile initrd_gfd, unsigned long initrd_len,
unsigned long nr_pages,
unsigned long *pvsi, unsigned long *pvke,
unsigned long *pvss, vcpu_guest_context_t *ctxt,
const char *cmdline,
unsigned long shared_info_frame,
unsigned long flags,
unsigned int store_evtchn, unsigned long *store_mfn,
unsigned int console_evtchn, unsigned long *console_mfn)
{
unsigned long *page_array = NULL;
unsigned long count, i, hypercall_pfn;
start_info_t *start_info;
shared_info_t *shared_info;
xc_mmu_t *mmu = NULL;
char *p;
DECLARE_DOM0_OP;
int rc;
unsigned long nr_pt_pages;
unsigned long physmap_pfn;
unsigned long *physmap, *physmap_e;
struct load_funcs load_funcs;
struct domain_setup_info dsi;
unsigned long vinitrd_start;
unsigned long vinitrd_end;
unsigned long vphysmap_start;
unsigned long vphysmap_end;
unsigned long vstartinfo_start;
unsigned long vstartinfo_end;
unsigned long vstoreinfo_start;
unsigned long vstoreinfo_end;
unsigned long vconsole_start;
unsigned long vconsole_end;
unsigned long vstack_start;
unsigned long vstack_end;
unsigned long vpt_start;
unsigned long vpt_end;
unsigned long v_end;
unsigned shadow_mode_enabled;
unsigned long guest_store_mfn, guest_console_mfn, guest_shared_info_mfn;
rc = probeimageformat(image, image_size, &load_funcs);
if ( rc != 0 )
goto error_out;
memset(&dsi, 0, sizeof(struct domain_setup_info));
rc = (load_funcs.parseimage)(image, image_size, &dsi);
if ( rc != 0 )
goto error_out;
if ( (dsi.v_start & (PAGE_SIZE-1)) != 0 )
{
PERROR("Guest OS must load to a page boundary.\n");
goto error_out;
}
shadow_mode_enabled = !!strstr(dsi.xen_guest_string,
"SHADOW=translate");
/*
* Why do we need this? The number of page-table frames depends on the
* size of the bootstrap address space. But the size of the address space
* depends on the number of page-table frames (since each one is mapped
* read-only). We have a pair of simultaneous equations in two unknowns,
* which we solve by exhaustive search.
*/
vinitrd_start = round_pgup(dsi.v_end);
vinitrd_end = vinitrd_start + initrd_len;
vphysmap_start = round_pgup(vinitrd_end);
vphysmap_end = vphysmap_start + (nr_pages * sizeof(unsigned long));
vstartinfo_start = round_pgup(vphysmap_end);
vstartinfo_end = vstartinfo_start + PAGE_SIZE;
vstoreinfo_start = vstartinfo_end;
vstoreinfo_end = vstoreinfo_start + PAGE_SIZE;
vconsole_start = vstoreinfo_end;
vconsole_end = vconsole_start + PAGE_SIZE;
vpt_start = vconsole_end;
for ( nr_pt_pages = 2; ; nr_pt_pages++ )
{
vpt_end = vpt_start + (nr_pt_pages * PAGE_SIZE);
vstack_start = vpt_end;
vstack_end = vstack_start + PAGE_SIZE;
v_end = (vstack_end + (1UL<<22)-1) & ~((1UL<<22)-1);
if ( (v_end - vstack_end) < (512UL << 10) )
v_end += 1UL << 22; /* Add extra 4MB to get >= 512kB padding. */
#if defined(__i386__)
if ( dsi.pae_kernel )
{
/* FIXME: assumes one L2 pgtable @ 0xc0000000 */
if ( (((v_end - dsi.v_start + ((1<<L2_PAGETABLE_SHIFT_PAE)-1)) >>
L2_PAGETABLE_SHIFT_PAE) + 2) <= nr_pt_pages )
break;
}
else
{
if ( (((v_end - dsi.v_start + ((1<<L2_PAGETABLE_SHIFT)-1)) >>
L2_PAGETABLE_SHIFT) + 1) <= nr_pt_pages )
break;
}
#endif
#if defined(__x86_64__)
#define NR(_l,_h,_s) \
(((((_h) + ((1UL<<(_s))-1)) & ~((1UL<<(_s))-1)) - \
((_l) & ~((1UL<<(_s))-1))) >> (_s))
if ( (1 + /* # L4 */
NR(dsi.v_start, v_end, L4_PAGETABLE_SHIFT) + /* # L3 */
NR(dsi.v_start, v_end, L3_PAGETABLE_SHIFT) + /* # L2 */
NR(dsi.v_start, v_end, L2_PAGETABLE_SHIFT)) /* # L1 */
<= nr_pt_pages )
break;
#endif
}
#define _p(a) ((void *) (a))
printf("VIRTUAL MEMORY ARRANGEMENT:\n"
" Loaded kernel: %p->%p\n"
" Init. ramdisk: %p->%p\n"
" Phys-Mach map: %p->%p\n"
" Start info: %p->%p\n"
" Store page: %p->%p\n"
" Console page: %p->%p\n"
" Page tables: %p->%p\n"
" Boot stack: %p->%p\n"
" TOTAL: %p->%p\n",
_p(dsi.v_kernstart), _p(dsi.v_kernend),
_p(vinitrd_start), _p(vinitrd_end),
_p(vphysmap_start), _p(vphysmap_end),
_p(vstartinfo_start), _p(vstartinfo_end),
_p(vstoreinfo_start), _p(vstoreinfo_end),
_p(vconsole_start), _p(vconsole_end),
_p(vpt_start), _p(vpt_end),
_p(vstack_start), _p(vstack_end),
_p(dsi.v_start), _p(v_end));
printf(" ENTRY ADDRESS: %p\n", _p(dsi.v_kernentry));
if ( ((v_end - dsi.v_start)>>PAGE_SHIFT) > nr_pages )
{
PERROR("Initial guest OS requires too much space\n"
"(%luMB is greater than %luMB limit)\n",
(v_end-dsi.v_start)>>20, nr_pages>>(20-PAGE_SHIFT));
goto error_out;
}
if ( (page_array = malloc(nr_pages * sizeof(unsigned long))) == NULL )
{
PERROR("Could not allocate memory");
goto error_out;
}
if ( xc_get_pfn_list(xc_handle, dom, page_array, nr_pages) != nr_pages )
{
PERROR("Could not get the page frame list");
goto error_out;
}
(load_funcs.loadimage)(image, image_size, xc_handle, dom, page_array,
&dsi);
/* Load the initial ramdisk image. */
if ( initrd_len != 0 )
{
for ( i = (vinitrd_start - dsi.v_start);
i < (vinitrd_end - dsi.v_start); i += PAGE_SIZE )
{
char page[PAGE_SIZE];
if ( gzread(initrd_gfd, page, PAGE_SIZE) == -1 )
{
PERROR("Error reading initrd image, could not");
goto error_out;
}
xc_copy_to_domain_page(xc_handle, dom,
page_array[i>>PAGE_SHIFT], page);
}
}
/* setup page tables */
#if defined(__i386__)
if (dsi.pae_kernel)
rc = setup_pg_tables_pae(xc_handle, dom, ctxt,
dsi.v_start, v_end,
page_array, vpt_start, vpt_end,
shadow_mode_enabled);
else
rc = setup_pg_tables(xc_handle, dom, ctxt,
dsi.v_start, v_end,
page_array, vpt_start, vpt_end,
shadow_mode_enabled);
#endif
#if defined(__x86_64__)
rc = setup_pg_tables_64(xc_handle, dom, ctxt,
dsi.v_start, v_end,
page_array, vpt_start, vpt_end,
shadow_mode_enabled);
#endif
if (0 != rc)
goto error_out;
#if defined(__i386__)
/*
* Pin down l2tab addr as page dir page - causes hypervisor to provide
* correct protection for the page
*/
if ( !shadow_mode_enabled )
{
if ( dsi.pae_kernel )
{
if ( pin_table(xc_handle, MMUEXT_PIN_L3_TABLE,
ctxt->ctrlreg[3] >> PAGE_SHIFT, dom) )
goto error_out;
}
else
{
if ( pin_table(xc_handle, MMUEXT_PIN_L2_TABLE,
ctxt->ctrlreg[3] >> PAGE_SHIFT, dom) )
goto error_out;
}
}
#endif
#if defined(__x86_64__)
/*
* Pin down l4tab addr as page dir page - causes hypervisor to provide
* correct protection for the page
*/
if ( pin_table(xc_handle, MMUEXT_PIN_L4_TABLE,
ctxt->ctrlreg[3] >> PAGE_SHIFT, dom) )
goto error_out;
#endif
if ( (mmu = xc_init_mmu_updates(xc_handle, dom)) == NULL )
goto error_out;
/* Write the phys->machine and machine->phys table entries. */
physmap_pfn = (vphysmap_start - dsi.v_start) >> PAGE_SHIFT;
physmap = physmap_e = xc_map_foreign_range(
xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE,
page_array[physmap_pfn++]);
for ( count = 0; count < nr_pages; count++ )
{
if ( xc_add_mmu_update(
xc_handle, mmu,
((uint64_t)page_array[count] << PAGE_SHIFT) | MMU_MACHPHYS_UPDATE,
count) )
{
fprintf(stderr,"m2p update failure p=%lx m=%lx\n",
count, page_array[count]);
munmap(physmap, PAGE_SIZE);
goto error_out;
}
*physmap_e++ = page_array[count];
if ( ((unsigned long)physmap_e & (PAGE_SIZE-1)) == 0 )
{
munmap(physmap, PAGE_SIZE);
physmap = physmap_e = xc_map_foreign_range(
xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE,
page_array[physmap_pfn++]);
}
}
munmap(physmap, PAGE_SIZE);
/* Send the page update requests down to the hypervisor. */
if ( xc_finish_mmu_updates(xc_handle, mmu) )
goto error_out;
if ( shadow_mode_enabled )
{
struct xen_reserved_phys_area xrpa;
/* Enable shadow translate mode */
if ( xc_shadow_control(xc_handle, dom,
DOM0_SHADOW_CONTROL_OP_ENABLE_TRANSLATE,
NULL, 0, NULL) < 0 )
{
PERROR("Could not enable translation mode");
goto error_out;
}
/* Find the shared info frame. It's guaranteed to be at the
start of the PFN hole. */
xrpa.domid = dom;
xrpa.idx = 0;
rc = xc_memory_op(xc_handle, XENMEM_reserved_phys_area, &xrpa);
if ( rc != 0 )
{
PERROR("Cannot find shared info pfn");
goto error_out;
}
guest_shared_info_mfn = xrpa.first_gpfn;
}
else
{
guest_shared_info_mfn = shared_info_frame;
}
*store_mfn = page_array[(vstoreinfo_start-dsi.v_start) >> PAGE_SHIFT];
*console_mfn = page_array[(vconsole_start-dsi.v_start) >> PAGE_SHIFT];
if ( xc_clear_domain_page(xc_handle, dom, *store_mfn) ||
xc_clear_domain_page(xc_handle, dom, *console_mfn) )
goto error_out;
if ( shadow_mode_enabled )
{
guest_store_mfn = (vstoreinfo_start-dsi.v_start) >> PAGE_SHIFT;
guest_console_mfn = (vconsole_start-dsi.v_start) >> PAGE_SHIFT;
}
else
{
guest_store_mfn = *store_mfn;
guest_console_mfn = *console_mfn;
}
start_info = xc_map_foreign_range(
xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE,
page_array[(vstartinfo_start-dsi.v_start)>>PAGE_SHIFT]);
/*shared_info, start_info */
memset(start_info, 0, sizeof(*start_info));
rc = xc_version(xc_handle, XENVER_version, NULL);
sprintf(start_info->magic, "xen-%i.%i-x86_%d%s",
rc >> 16, rc & (0xFFFF), (unsigned int)sizeof(long)*8,
dsi.pae_kernel ? "p" : "");
start_info->nr_pages = nr_pages;
start_info->shared_info = guest_shared_info_mfn << PAGE_SHIFT;
start_info->flags = flags;
start_info->pt_base = vpt_start;
start_info->nr_pt_frames = nr_pt_pages;
start_info->mfn_list = vphysmap_start;
start_info->store_mfn = guest_store_mfn;
start_info->store_evtchn = store_evtchn;
start_info->console_mfn = guest_console_mfn;
start_info->console_evtchn = console_evtchn;
if ( initrd_len != 0 )
{
start_info->mod_start = vinitrd_start;
start_info->mod_len = initrd_len;
}
if ( cmdline != NULL )
{
strncpy((char *)start_info->cmd_line, cmdline, MAX_GUEST_CMDLINE);
start_info->cmd_line[MAX_GUEST_CMDLINE-1] = '\0';
}
munmap(start_info, PAGE_SIZE);
/* shared_info page starts its life empty. */
shared_info = xc_map_foreign_range(
xc_handle, dom, PAGE_SIZE, PROT_READ|PROT_WRITE, shared_info_frame);
memset(shared_info, 0, sizeof(shared_info_t));
/* Mask all upcalls... */
for ( i = 0; i < MAX_VIRT_CPUS; i++ )
shared_info->vcpu_info[i].evtchn_upcall_mask = 1;
munmap(shared_info, PAGE_SIZE);
/* Send the page update requests down to the hypervisor. */
if ( xc_finish_mmu_updates(xc_handle, mmu) )
goto error_out;
p = strstr(dsi.xen_guest_string, "HYPERCALL_PAGE=");
if ( p != NULL )
{
p += strlen("HYPERCALL_PAGE=");
hypercall_pfn = strtoul(p, NULL, 16);
if ( hypercall_pfn >= nr_pages )
goto error_out;
op.u.hypercall_init.domain = (domid_t)dom;
op.u.hypercall_init.mfn = page_array[hypercall_pfn];
op.cmd = DOM0_HYPERCALL_INIT;
if ( xc_dom0_op(xc_handle, &op) )
goto error_out;
}
free(mmu);
free(page_array);
*pvsi = vstartinfo_start;
*pvss = vstack_start;
*pvke = dsi.v_kernentry;
return 0;
error_out:
free(mmu);
free(page_array);
return -1;
}
#endif
int xc_linux_build(int xc_handle,
uint32_t domid,
const char *image_name,
const char *ramdisk_name,
const char *cmdline,
unsigned long flags,
unsigned int store_evtchn,
unsigned long *store_mfn,
unsigned int console_evtchn,
unsigned long *console_mfn)
{
dom0_op_t launch_op;
DECLARE_DOM0_OP;
int initrd_fd = -1;
gzFile initrd_gfd = NULL;
int rc, i;
vcpu_guest_context_t st_ctxt, *ctxt = &st_ctxt;
unsigned long nr_pages;
char *image = NULL;
unsigned long image_size, initrd_size=0;
unsigned long vstartinfo_start, vkern_entry, vstack_start;
if ( (nr_pages = get_tot_pages(xc_handle, domid)) < 0 )
{
PERROR("Could not find total pages for domain");
goto error_out;
}
if ( (image = xc_read_kernel_image(image_name, &image_size)) == NULL )
goto error_out;
if ( (ramdisk_name != NULL) && (strlen(ramdisk_name) != 0) )
{
if ( (initrd_fd = open(ramdisk_name, O_RDONLY)) < 0 )
{
PERROR("Could not open the initial ramdisk image");
goto error_out;
}
initrd_size = xc_get_filesz(initrd_fd);
if ( (initrd_gfd = gzdopen(initrd_fd, "rb")) == NULL )
{
PERROR("Could not allocate decompression state for initrd");
goto error_out;
}
}
#ifdef VALGRIND
memset(&st_ctxt, 0, sizeof(st_ctxt));
#endif
if ( mlock(&st_ctxt, sizeof(st_ctxt) ) )
{
PERROR("%s: ctxt mlock failed", __func__);
return 1;
}
op.cmd = DOM0_GETDOMAININFO;
op.u.getdomaininfo.domain = (domid_t)domid;
if ( (xc_dom0_op(xc_handle, &op) < 0) ||
((uint16_t)op.u.getdomaininfo.domain != domid) )
{
PERROR("Could not get info on domain");
goto error_out;
}
memset(ctxt, 0, sizeof(*ctxt));
if ( setup_guest(xc_handle, domid, image, image_size,
initrd_gfd, initrd_size, nr_pages,
&vstartinfo_start, &vkern_entry,
&vstack_start, ctxt, cmdline,
op.u.getdomaininfo.shared_info_frame,
flags, store_evtchn, store_mfn,
console_evtchn, console_mfn) < 0 )
{
ERROR("Error constructing guest OS");
goto error_out;
}
if ( initrd_fd >= 0 )
close(initrd_fd);
if ( initrd_gfd )
gzclose(initrd_gfd);
free(image);
#ifdef __ia64__
/* based on new_thread in xen/arch/ia64/domain.c */
ctxt->flags = 0;
ctxt->shared.flags = flags;
ctxt->shared.start_info_pfn = nr_pages - 3; /* metaphysical */
ctxt->regs.cr_ipsr = 0; /* all necessary bits filled by hypervisor */
ctxt->regs.cr_iip = vkern_entry;
ctxt->regs.cr_ifs = 1UL << 63;
ctxt->regs.ar_fpsr = xc_ia64_fpsr_default();
/* currently done by hypervisor, should move here */
/* ctxt->regs.r28 = dom_fw_setup(); */
ctxt->vcpu.privregs = 0;
ctxt->sys_pgnr = 3;
i = 0; /* silence unused variable warning */
#else /* x86 */
/*
* Initial register values:
* DS,ES,FS,GS = FLAT_KERNEL_DS
* CS:EIP = FLAT_KERNEL_CS:start_pc
* SS:ESP = FLAT_KERNEL_DS:start_stack
* ESI = start_info
* [EAX,EBX,ECX,EDX,EDI,EBP are zero]
* EFLAGS = IF | 2 (bit 1 is reserved and should always be 1)
*/
ctxt->user_regs.ds = FLAT_KERNEL_DS;
ctxt->user_regs.es = FLAT_KERNEL_DS;
ctxt->user_regs.fs = FLAT_KERNEL_DS;
ctxt->user_regs.gs = FLAT_KERNEL_DS;
ctxt->user_regs.ss = FLAT_KERNEL_SS;
ctxt->user_regs.cs = FLAT_KERNEL_CS;
ctxt->user_regs.eip = vkern_entry;
ctxt->user_regs.esp = vstack_start + PAGE_SIZE;
ctxt->user_regs.esi = vstartinfo_start;
ctxt->user_regs.eflags = 1 << 9; /* Interrupt Enable */
ctxt->flags = VGCF_IN_KERNEL;
/* FPU is set up to default initial state. */
memset(&ctxt->fpu_ctxt, 0, sizeof(ctxt->fpu_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;
}
/* No LDT. */
ctxt->ldt_ents = 0;
/* Use the default Xen-provided GDT. */
ctxt->gdt_ents = 0;
/* Ring 1 stack is the initial stack. */
ctxt->kernel_ss = FLAT_KERNEL_SS;
ctxt->kernel_sp = vstack_start + PAGE_SIZE;
/* No debugging. */
memset(ctxt->debugreg, 0, sizeof(ctxt->debugreg));
/* No callback handlers. */
#if defined(__i386__)
ctxt->event_callback_cs = FLAT_KERNEL_CS;
ctxt->event_callback_eip = 0;
ctxt->failsafe_callback_cs = FLAT_KERNEL_CS;
ctxt->failsafe_callback_eip = 0;
#elif defined(__x86_64__)
ctxt->event_callback_eip = 0;
ctxt->failsafe_callback_eip = 0;
ctxt->syscall_callback_eip = 0;
#endif
#endif /* x86 */
memset( &launch_op, 0, sizeof(launch_op) );
launch_op.u.setvcpucontext.domain = (domid_t)domid;
launch_op.u.setvcpucontext.vcpu = 0;
launch_op.u.setvcpucontext.ctxt = ctxt;
launch_op.cmd = DOM0_SETVCPUCONTEXT;
rc = xc_dom0_op(xc_handle, &launch_op);
return rc;
error_out:
if ( initrd_gfd != NULL )
gzclose(initrd_gfd);
else if ( initrd_fd >= 0 )
close(initrd_fd);
free(image);
return -1;
}
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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