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[HVM] Save/restore: merge xc_linux_save and xc_hvm_save

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into xc_domain_save, like we did for xc_domain_restore
Signed-off-by: Tim Deegan <Tim.Deegan@xensource.com>

--HG--
rename : tools/libxc/xc_linux_save.c => tools/libxc/xc_domain_save.c
This commit is contained in:
Tim Deegan committed 2007-04-11 14:45:14 +01:00
1 parent 30fbfa471f
commit d11bec8a19
7 files changed
+367 -946
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tools/libxc/Makefile
+2 -2
View File
@@ -26,8 +26,8 @@ CTRL_SRCS-$(CONFIG_X86_Linux) += xc_ptrace.c xc_ptrace_core.c
GUEST_SRCS-y :=
GUEST_SRCS-y += xg_private.c
GUEST_SRCS-$(CONFIG_MIGRATE) += xc_domain_restore.c xc_linux_save.c
GUEST_SRCS-$(CONFIG_HVM) += xc_hvm_build.c xc_hvm_save.c
GUEST_SRCS-$(CONFIG_MIGRATE) += xc_domain_restore.c xc_domain_save.c
GUEST_SRCS-$(CONFIG_HVM) += xc_hvm_build.c
# symlink libelf from xen/common/libelf/
LIBELF_SRCS := libelf-tools.c libelf-loader.c
tools/libxc/ia64/xc_ia64_linux_save.c
+4 -2
View File
@@ -134,8 +134,10 @@ retry:
}
int
xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
uint32_t max_factor, uint32_t flags, int (*suspend)(int))
xc_domain_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
uint32_t max_factor, uint32_t flags, int (*suspend)(int),
int hvm, void *(*init_qemu_maps)(int, unsigned),
void (*qemu_flip_buffer)(int, int))
{
DECLARE_DOMCTL;
xc_dominfo_t info;
tools/libxc/xc_linux_save.c → tools/libxc/xc_domain_save.c
+352 -157
View File
@@ -17,9 +17,12 @@
#include "xg_private.h"
#include "xg_save_restore.h"
#include <xen/hvm/params.h>
#include <xen/hvm/e820.h>
/*
** Default values for important tuning parameters. Can override by passing
** non-zero replacement values to xc_linux_save().
** non-zero replacement values to xc_domain_save().
**
** XXX SMH: should consider if want to be able to override MAX_MBIT_RATE too.
**
@@ -36,6 +39,11 @@ static unsigned long hvirt_start;
/* #levels of page tables used by the current guest */
static unsigned int pt_levels;
/* HVM: shared-memory bitmaps for getting log-dirty bits from qemu-dm */
static unsigned long *qemu_bitmaps[2];
static int qemu_active;
static int qemu_non_active;
/* number of pfns this guest has (i.e. number of entries in the P2M) */
static unsigned long p2m_size;
@@ -77,7 +85,8 @@ static unsigned long m2p_mfn0;
*/
#define BITS_PER_LONG (sizeof(unsigned long) * 8)
#define BITMAP_SIZE ((p2m_size + BITS_PER_LONG - 1) / 8)
#define BITS_TO_LONGS(bits) (((bits)+BITS_PER_LONG-1)/BITS_PER_LONG)
#define BITMAP_SIZE (BITS_TO_LONGS(p2m_size) * sizeof(unsigned long))
#define BITMAP_ENTRY(_nr,_bmap) \
((volatile unsigned long *)(_bmap))[(_nr)/BITS_PER_LONG]
@@ -650,8 +659,131 @@ static xen_pfn_t *xc_map_m2p(int xc_handle,
return m2p;
}
int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
uint32_t max_factor, uint32_t flags, int (*suspend)(int))
static xen_pfn_t *map_and_save_p2m_table(int xc_handle,
int io_fd,
uint32_t dom,
vcpu_guest_context_t *ctxt,
unsigned long p2m_size,
shared_info_t *live_shinfo)
{
/* Double and single indirect references to the live P2M table */
xen_pfn_t *live_p2m_frame_list_list = NULL;
xen_pfn_t *live_p2m_frame_list = NULL;
/* A copy of the pfn-to-mfn table frame list. */
xen_pfn_t *p2m_frame_list = NULL;
/* The mapping of the live p2m table itself */
xen_pfn_t *p2m = NULL;
int i, success = 0;
live_p2m_frame_list_list = map_frame_list_list(xc_handle, dom,
live_shinfo);
if ( !live_p2m_frame_list_list )
goto out;
live_p2m_frame_list =
xc_map_foreign_batch(xc_handle, dom, PROT_READ,
live_p2m_frame_list_list,
P2M_FLL_ENTRIES);
if ( !live_p2m_frame_list )
{
ERROR("Couldn't map p2m_frame_list");
goto out;
}
/* Map all the frames of the pfn->mfn table. For migrate to succeed,
the guest must not change which frames are used for this purpose.
(its not clear why it would want to change them, and we'll be OK
from a safety POV anyhow. */
p2m = xc_map_foreign_batch(xc_handle, dom, PROT_READ,
live_p2m_frame_list,
P2M_FL_ENTRIES);
if ( !p2m )
{
ERROR("Couldn't map p2m table");
goto out;
}
live_p2m = p2m; /* So that translation macros will work */
/* Get a local copy of the live_P2M_frame_list */
if ( !(p2m_frame_list = malloc(P2M_FL_SIZE)) )
{
ERROR("Couldn't allocate p2m_frame_list array");
goto out;
}
memcpy(p2m_frame_list, live_p2m_frame_list, P2M_FL_SIZE);
/* Canonicalise the pfn-to-mfn table frame-number list. */
for ( i = 0; i < p2m_size; i += fpp )
{
if ( !translate_mfn_to_pfn(&p2m_frame_list[i/fpp]) )
{
ERROR("Frame# in pfn-to-mfn frame list is not in pseudophys");
ERROR("entry %d: p2m_frame_list[%ld] is 0x%"PRIx64, i, i/fpp,
(uint64_t)p2m_frame_list[i/fpp]);
goto out;
}
}
/*
* Write an extended-info structure to inform the restore code that
* a PAE guest understands extended CR3 (PDPTs above 4GB). Turns off
* slow paths in the restore code.
*/
if ( (pt_levels == 3) &&
(ctxt->vm_assist & (1UL << VMASST_TYPE_pae_extended_cr3)) )
{
unsigned long signature = ~0UL;
uint32_t tot_sz = sizeof(struct vcpu_guest_context) + 8;
uint32_t chunk_sz = sizeof(struct vcpu_guest_context);
char chunk_sig[] = "vcpu";
if ( !write_exact(io_fd, &signature, sizeof(signature)) ||
!write_exact(io_fd, &tot_sz, sizeof(tot_sz)) ||
!write_exact(io_fd, &chunk_sig, 4) ||
!write_exact(io_fd, &chunk_sz, sizeof(chunk_sz)) ||
!write_exact(io_fd, ctxt, sizeof(*ctxt)) )
{
ERROR("write: extended info");
goto out;
}
}
if ( !write_exact(io_fd, p2m_frame_list, P2M_FL_SIZE) )
{
ERROR("write: p2m_frame_list");
goto out;
}
success = 1;
out:
if ( !success && p2m )
munmap(p2m, ROUNDUP(p2m_size * sizeof(xen_pfn_t), PAGE_SHIFT));
if ( live_p2m_frame_list_list )
munmap(live_p2m_frame_list_list, PAGE_SIZE);
if ( live_p2m_frame_list )
munmap(live_p2m_frame_list, P2M_FLL_ENTRIES * PAGE_SIZE);
if ( p2m_frame_list )
free(p2m_frame_list);
return success ? p2m : NULL;
}
int xc_domain_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
uint32_t max_factor, uint32_t flags, int (*suspend)(int),
int hvm, void *(*init_qemu_maps)(int, unsigned),
void (*qemu_flip_buffer)(int, int))
{
xc_dominfo_t info;
@@ -666,20 +798,13 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
/* A copy of the CPU context of the guest. */
vcpu_guest_context_t ctxt;
/* A table containg the type of each PFN (/not/ MFN!). */
/* A table containing the type of each PFN (/not/ MFN!). */
unsigned long *pfn_type = NULL;
unsigned long *pfn_batch = NULL;
/* A temporary mapping, and a copy, of one frame of guest memory. */
/* A copy of one frame of guest memory. */
char page[PAGE_SIZE];
/* Double and single indirect references to the live P2M table */
xen_pfn_t *live_p2m_frame_list_list = NULL;
xen_pfn_t *live_p2m_frame_list = NULL;
/* A copy of the pfn-to-mfn table frame list. */
xen_pfn_t *p2m_frame_list = NULL;
/* Live mapping of shared info structure */
shared_info_t *live_shinfo = NULL;
@@ -702,6 +827,13 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
uint64_t vcpumap = 1ULL;
/* HVM: a buffer for holding HVM context */
uint32_t hvm_buf_size = 0;
uint8_t *hvm_buf = NULL;
/* HVM: magic frames for ioreqs and xenstore comms. */
uint64_t magic_pfns[3]; /* ioreq_pfn, bufioreq_pfn, store_pfn */
/* If no explicit control parameters given, use defaults */
max_iters = max_iters ? : DEF_MAX_ITERS;
max_factor = max_factor ? : DEF_MAX_FACTOR;
@@ -729,72 +861,20 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
shared_info_frame = info.shared_info_frame;
/* Map the shared info frame */
if ( !(live_shinfo = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
PROT_READ, shared_info_frame)) )
if ( !hvm )
{
ERROR("Couldn't map live_shinfo");
goto out;
}
p2m_size = live_shinfo->arch.max_pfn;
live_p2m_frame_list_list = map_frame_list_list(xc_handle, dom,
live_shinfo);
if ( !live_p2m_frame_list_list )
goto out;
live_p2m_frame_list =
xc_map_foreign_batch(xc_handle, dom, PROT_READ,
live_p2m_frame_list_list,
P2M_FLL_ENTRIES);
if ( !live_p2m_frame_list )
{
ERROR("Couldn't map p2m_frame_list");
goto out;
}
/* Map all the frames of the pfn->mfn table. For migrate to succeed,
the guest must not change which frames are used for this purpose.
(its not clear why it would want to change them, and we'll be OK
from a safety POV anyhow. */
live_p2m = xc_map_foreign_batch(xc_handle, dom, PROT_READ,
live_p2m_frame_list,
P2M_FL_ENTRIES);
if ( !live_p2m )
{
ERROR("Couldn't map p2m table");
goto out;
}
/* Setup the mfn_to_pfn table mapping */
if ( !(live_m2p = xc_map_m2p(xc_handle, max_mfn, PROT_READ)) )
{
ERROR("Failed to map live M2P table");
goto out;
}
/* Get a local copy of the live_P2M_frame_list */
if ( !(p2m_frame_list = malloc(P2M_FL_SIZE)) )
{
ERROR("Couldn't allocate p2m_frame_list array");
goto out;
}
memcpy(p2m_frame_list, live_p2m_frame_list, P2M_FL_SIZE);
/* Canonicalise the pfn-to-mfn table frame-number list. */
for ( i = 0; i < p2m_size; i += fpp )
{
if ( !translate_mfn_to_pfn(&p2m_frame_list[i/fpp]) )
live_shinfo = xc_map_foreign_range(xc_handle, dom, PAGE_SIZE,
PROT_READ, shared_info_frame);
if ( !live_shinfo )
{
ERROR("Frame# in pfn-to-mfn frame list is not in pseudophys");
ERROR("entry %d: p2m_frame_list[%ld] is 0x%"PRIx64, i, i/fpp,
(uint64_t)p2m_frame_list[i/fpp]);
ERROR("Couldn't map live_shinfo");
goto out;
}
}
/* Get the size of the P2M table */
p2m_size = xc_memory_op(xc_handle, XENMEM_maximum_gpfn, &dom);
/* Domain is still running at this point */
if ( live )
{
@@ -806,6 +886,16 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
ERROR("Couldn't enable shadow mode");
goto out;
}
if ( hvm )
{
/* Get qemu-dm logging dirty pages too */
void *seg = init_qemu_maps(dom, BITMAP_SIZE);
qemu_bitmaps[0] = seg;
qemu_bitmaps[1] = seg + BITMAP_SIZE;
qemu_active = 0;
qemu_non_active = 1;
}
}
else
{
@@ -853,6 +943,23 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
return 1;
}
if ( hvm )
{
/* Need another buffer for HVM context */
hvm_buf_size = xc_domain_hvm_getcontext(xc_handle, dom, 0, 0);
if ( hvm_buf_size == -1 )
{
ERROR("Couldn't get HVM context size from Xen");
goto out;
}
hvm_buf = malloc(hvm_buf_size);
if ( !hvm_buf )
{
ERROR("Couldn't allocate memory");
goto out;
}
}
analysis_phase(xc_handle, dom, p2m_size, to_skip, 0);
/* We want zeroed memory so use calloc rather than malloc. */
@@ -871,12 +978,38 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
goto out;
}
/*
* Quick belt and braces sanity check.
*/
/* Setup the mfn_to_pfn table mapping */
if ( !(live_m2p = xc_map_m2p(xc_handle, max_mfn, PROT_READ)) )
{
int err=0;
ERROR("Failed to map live M2P table");
goto out;
}
/* Start writing out the saved-domain record. */
if ( !write_exact(io_fd, &p2m_size, sizeof(unsigned long)) )
{
ERROR("write: p2m_size");
goto out;
}
if ( !hvm )
{
int err = 0;
unsigned long mfn;
/* Map the P2M table, and write the list of P2M frames */
live_p2m = map_and_save_p2m_table(xc_handle, io_fd, dom,
&ctxt, p2m_size, live_shinfo);
if ( live_p2m == NULL )
{
ERROR("Failed to map/save the p2m frame list");
goto out;
}
/*
* Quick belt and braces sanity check.
*/
for ( i = 0; i < p2m_size; i++ )
{
mfn = live_p2m[i];
@@ -890,42 +1023,6 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
DPRINTF("Had %d unexplained entries in p2m table\n", err);
}
/* Start writing out the saved-domain record. */
if ( !write_exact(io_fd, &p2m_size, sizeof(unsigned long)) )
{
ERROR("write: p2m_size");
goto out;
}
/*
* Write an extended-info structure to inform the restore code that
* a PAE guest understands extended CR3 (PDPTs above 4GB). Turns off
* slow paths in the restore code.
*/
if ( (pt_levels == 3) &&
(ctxt.vm_assist & (1UL << VMASST_TYPE_pae_extended_cr3)) )
{
unsigned long signature = ~0UL;
uint32_t tot_sz = sizeof(struct vcpu_guest_context) + 8;
uint32_t chunk_sz = sizeof(struct vcpu_guest_context);
char chunk_sig[] = "vcpu";
if ( !write_exact(io_fd, &signature, sizeof(signature)) ||
!write_exact(io_fd, &tot_sz, sizeof(tot_sz)) ||
!write_exact(io_fd, &chunk_sig, 4) ||
!write_exact(io_fd, &chunk_sz, sizeof(chunk_sz)) ||
!write_exact(io_fd, &ctxt, sizeof(ctxt)) )
{
ERROR("write: extended info");
goto out;
}
}
if ( !write_exact(io_fd, p2m_frame_list, P2M_FL_SIZE) )
{
ERROR("write: p2m_frame_list");
goto out;
}
print_stats(xc_handle, dom, 0, &stats, 0);
/* Now write out each data page, canonicalising page tables as we go... */
@@ -976,9 +1073,9 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
if ( debug )
DPRINTF("%d pfn= %08lx mfn= %08lx %d [mfn]= %08lx\n",
iter, (unsigned long)n, live_p2m[n],
iter, (unsigned long)n, hvm ? 0 : live_p2m[n],
test_bit(n, to_send),
mfn_to_pfn(live_p2m[n]&0xFFFFF));
hvm ? 0 : mfn_to_pfn(live_p2m[n]&0xFFFFF));
if ( !last_iter &&
test_bit(n, to_send) &&
@@ -990,6 +1087,12 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
(test_bit(n, to_fix) && last_iter)) )
continue;
/* Skip PFNs that aren't really there */
if ( hvm && ((n >= 0xa0 && n < 0xc0) /* VGA hole */
|| (n >= (HVM_BELOW_4G_MMIO_START >> PAGE_SHIFT)
&& n < (1ULL<<32) >> PAGE_SHIFT)) /* MMIO */ )
continue;
/*
** we get here if:
** 1. page is marked to_send & hasn't already been re-dirtied
@@ -998,15 +1101,21 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
*/
pfn_batch[batch] = n;
pfn_type[batch] = live_p2m[n];
/* Hypercall interfaces operate in PFNs for HVM guests
* and MFNs for PV guests */
if ( hvm )
pfn_type[batch] = n;
else
pfn_type[batch] = live_p2m[n];
if ( !is_mapped(pfn_type[batch]) )
{
/*
** not currently in psuedo-physical map -- set bit
** in to_fix since we must send this page in last_iter
** unless its sent sooner anyhow, or it never enters
** pseudo-physical map (e.g. for ballooned down domains)
** pseudo-physical map (e.g. for ballooned down doms)
*/
set_bit(n, to_fix);
continue;
@@ -1020,9 +1129,9 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
DPRINTF("Fix! iter %d, pfn %x. mfn %lx\n",
iter, n, pfn_type[batch]);
}
clear_bit(n, to_fix);
batch++;
}
@@ -1037,41 +1146,46 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
goto out;
}
for ( j = 0; j < batch; j++ )
((uint32_t *)pfn_type)[j] = pfn_type[j];
if ( xc_get_pfn_type_batch(xc_handle, dom, batch,
(uint32_t *)pfn_type) )
if ( !hvm )
{
ERROR("get_pfn_type_batch failed");
goto out;
}
for ( j = batch-1; j >= 0; j-- )
pfn_type[j] = ((uint32_t *)pfn_type)[j];
for ( j = 0; j < batch; j++ )
{
if ( (pfn_type[j] & XEN_DOMCTL_PFINFO_LTAB_MASK) ==
XEN_DOMCTL_PFINFO_XTAB )
/* Get page types */
for ( j = 0; j < batch; j++ )
((uint32_t *)pfn_type)[j] = pfn_type[j];
if ( xc_get_pfn_type_batch(xc_handle, dom, batch,
(uint32_t *)pfn_type) )
{
DPRINTF("type fail: page %i mfn %08lx\n", j, pfn_type[j]);
continue;
ERROR("get_pfn_type_batch failed");
goto out;
}
for ( j = batch-1; j >= 0; j-- )
pfn_type[j] = ((uint32_t *)pfn_type)[j];
if ( debug )
DPRINTF("%d pfn= %08lx mfn= %08lx [mfn]= %08lx"
" sum= %08lx\n",
iter,
(pfn_type[j] & XEN_DOMCTL_PFINFO_LTAB_MASK) |
pfn_batch[j],
pfn_type[j],
mfn_to_pfn(pfn_type[j] &
~XEN_DOMCTL_PFINFO_LTAB_MASK),
csum_page(region_base + (PAGE_SIZE*j)));
/* canonicalise mfn->pfn */
pfn_type[j] = (pfn_type[j] & XEN_DOMCTL_PFINFO_LTAB_MASK) |
pfn_batch[j];
for ( j = 0; j < batch; j++ )
{
if ( (pfn_type[j] & XEN_DOMCTL_PFINFO_LTAB_MASK) ==
XEN_DOMCTL_PFINFO_XTAB )
{
DPRINTF("type fail: page %i mfn %08lx\n",
j, pfn_type[j]);
continue;
}
if ( debug )
DPRINTF("%d pfn= %08lx mfn= %08lx [mfn]= %08lx"
" sum= %08lx\n",
iter,
(pfn_type[j] & XEN_DOMCTL_PFINFO_LTAB_MASK) |
pfn_batch[j],
pfn_type[j],
mfn_to_pfn(pfn_type[j] &
~XEN_DOMCTL_PFINFO_LTAB_MASK),
csum_page(region_base + (PAGE_SIZE*j)));
/* canonicalise mfn->pfn */
pfn_type[j] = (pfn_type[j] & XEN_DOMCTL_PFINFO_LTAB_MASK) |
pfn_batch[j];
}
}
if ( !write_exact(io_fd, &batch, sizeof(unsigned int)) )
@@ -1081,7 +1195,7 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
goto out;
}
if ( !write_exact(io_fd, pfn_type, sizeof(unsigned long)*j) )
if ( !write_exact(io_fd, pfn_type, sizeof(unsigned long)*batch) )
{
ERROR("Error when writing to state file (3) (errno %d)",
errno);
@@ -1211,6 +1325,27 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
goto out;
}
if ( hvm )
{
/* Pull in the dirty bits from qemu-dm too */
if ( !last_iter )
{
qemu_active = qemu_non_active;
qemu_non_active = qemu_active ? 0 : 1;
qemu_flip_buffer(dom, qemu_active);
for ( j = 0; j < BITMAP_SIZE / sizeof(unsigned long); j++ )
{
to_send[j] |= qemu_bitmaps[qemu_non_active][j];
qemu_bitmaps[qemu_non_active][j] = 0;
}
}
else
{
for ( j = 0; j < BITMAP_SIZE / sizeof(unsigned long); j++ )
to_send[j] |= qemu_bitmaps[qemu_active][j];
}
}
sent_last_iter = sent_this_iter;
print_stats(xc_handle, dom, sent_this_iter, &stats, 1);
@@ -1257,6 +1392,72 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
goto out;
}
if ( hvm )
{
uint32_t rec_size;
/* Save magic-page locations. */
memset(magic_pfns, 0, sizeof(magic_pfns));
xc_get_hvm_param(xc_handle, dom, HVM_PARAM_IOREQ_PFN,
(unsigned long *)&magic_pfns[0]);
xc_get_hvm_param(xc_handle, dom, HVM_PARAM_BUFIOREQ_PFN,
(unsigned long *)&magic_pfns[1]);
xc_get_hvm_param(xc_handle, dom, HVM_PARAM_STORE_PFN,
(unsigned long *)&magic_pfns[2]);
if ( !write_exact(io_fd, magic_pfns, sizeof(magic_pfns)) )
{
ERROR("Error when writing to state file (7)");
goto out;
}
/* Save vcpu contexts */
for ( i = 0; i <= info.max_vcpu_id; i++ )
{
if ( !(vcpumap & (1ULL << i)) )
continue;
if ( xc_vcpu_getcontext(xc_handle, dom, i, &ctxt) )
{
ERROR("HVM:Could not get vcpu context");
goto out;
}
DPRINTF("write vcpu %d context.\n", i);
if ( !write_exact(io_fd, &(ctxt), sizeof(ctxt)) )
{
ERROR("write vcpu context failed!\n");
goto out;
}
}
/* Get HVM context from Xen and save it too */
if ( (rec_size = xc_domain_hvm_getcontext(xc_handle, dom, hvm_buf,
hvm_buf_size)) == -1 )
{
ERROR("HVM:Could not get hvm buffer");
goto out;
}
if ( !write_exact(io_fd, &rec_size, sizeof(uint32_t)) )
{
ERROR("error write hvm buffer size");
goto out;
}
if ( !write_exact(io_fd, hvm_buf, rec_size) )
{
ERROR("write HVM info failed!\n");
goto out;
}
/* HVM guests are done now */
rc = 0;
goto out;
}
/* PV guests only from now on */
/* Send through a list of all the PFNs that were not in map at the close */
{
unsigned int i,j;
@@ -1380,12 +1581,6 @@ int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
if ( live_shinfo )
munmap(live_shinfo, PAGE_SIZE);
if ( live_p2m_frame_list_list )
munmap(live_p2m_frame_list_list, PAGE_SIZE);
if ( live_p2m_frame_list )
munmap(live_p2m_frame_list, P2M_FLL_ENTRIES * PAGE_SIZE);
if ( live_p2m )
munmap(live_p2m, ROUNDUP(p2m_size * sizeof(xen_pfn_t), PAGE_SHIFT));
tools/libxc/xc_hvm_save.c
-755
View File
@@ -1,755 +0,0 @@
/******************************************************************************
* xc_hvm_save.c
*
* Save the state of a running HVM guest.
*
* Copyright (c) 2003, K A Fraser.
* Copyright (c) 2006 Intel Corperation
* rewriten for hvm guest by Zhai Edwin <edwin.zhai@intel.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
*/
#include <inttypes.h>
#include <time.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/time.h>
#include "xc_private.h"
#include "xg_private.h"
#include "xg_save_restore.h"
#include <xen/hvm/e820.h>
#include <xen/hvm/params.h>
/*
** Default values for important tuning parameters. Can override by passing
** non-zero replacement values to xc_hvm_save().
**
** XXX SMH: should consider if want to be able to override MAX_MBIT_RATE too.
**
*/
#define DEF_MAX_ITERS 29 /* limit us to 30 times round loop */
#define DEF_MAX_FACTOR 3 /* never send more than 3x nr_pfns */
/* Shared-memory bitmaps for getting log-dirty bits from qemu */
static unsigned long *qemu_bitmaps[2];
static int qemu_active;
static int qemu_non_active;
/*
** During (live) save/migrate, we maintain a number of bitmaps to track
** which pages we have to send, to fixup, and to skip.
*/
#define BITS_PER_LONG (sizeof(unsigned long) * 8)
#define BITS_TO_LONGS(bits) (((bits)+BITS_PER_LONG-1)/BITS_PER_LONG)
#define BITMAP_SIZE (BITS_TO_LONGS(pfn_array_size) * sizeof(unsigned long))
#define BITMAP_ENTRY(_nr,_bmap) \
((unsigned long *)(_bmap))[(_nr)/BITS_PER_LONG]
#define BITMAP_SHIFT(_nr) ((_nr) % BITS_PER_LONG)
static inline int test_bit (int nr, volatile void * addr)
{
return (BITMAP_ENTRY(nr, addr) >> BITMAP_SHIFT(nr)) & 1;
}
static inline void clear_bit (int nr, volatile void * addr)
{
BITMAP_ENTRY(nr, addr) &= ~(1UL << BITMAP_SHIFT(nr));
}
static inline int permute( int i, int nr, int order_nr )
{
/* Need a simple permutation function so that we scan pages in a
pseudo random order, enabling us to get a better estimate of
the domain's page dirtying rate as we go (there are often
contiguous ranges of pfns that have similar behaviour, and we
want to mix them up. */
/* e.g. nr->oder 15->4 16->4 17->5 */
/* 512MB domain, 128k pages, order 17 */
/*
QPONMLKJIHGFEDCBA
QPONMLKJIH
GFEDCBA
*/
/*
QPONMLKJIHGFEDCBA
EDCBA
QPONM
LKJIHGF
*/
do { i = ((i>>(order_nr-10)) | ( i<<10 ) ) & ((1<<order_nr)-1); }
while ( i >= nr ); /* this won't ever loop if nr is a power of 2 */
return i;
}
static uint64_t tv_to_us(struct timeval *new)
{
return (new->tv_sec * 1000000) + new->tv_usec;
}
static uint64_t llgettimeofday(void)
{
struct timeval now;
gettimeofday(&now, NULL);
return tv_to_us(&now);
}
static uint64_t tv_delta(struct timeval *new, struct timeval *old)
{
return (((new->tv_sec - old->tv_sec)*1000000) +
(new->tv_usec - old->tv_usec));
}
#define RATE_IS_MAX() (0)
#define ratewrite(_io_fd, _buf, _n) write((_io_fd), (_buf), (_n))
#define initialize_mbit_rate()
static inline ssize_t write_exact(int fd, void *buf, size_t count)
{
return (write(fd, buf, count) == count);
}
static int print_stats(int xc_handle, uint32_t domid, int pages_sent,
xc_shadow_op_stats_t *stats, int print)
{
static struct timeval wall_last;
static long long d0_cpu_last;
static long long d1_cpu_last;
struct timeval wall_now;
long long wall_delta;
long long d0_cpu_now, d0_cpu_delta;
long long d1_cpu_now, d1_cpu_delta;
gettimeofday(&wall_now, NULL);
d0_cpu_now = xc_domain_get_cpu_usage(xc_handle, 0, /* FIXME */ 0)/1000;
d1_cpu_now = xc_domain_get_cpu_usage(xc_handle, domid, /* FIXME */ 0)/1000;
if ( (d0_cpu_now == -1) || (d1_cpu_now == -1) )
DPRINTF("ARRHHH!!\n");
wall_delta = tv_delta(&wall_now,&wall_last)/1000;
if ( wall_delta == 0 )
wall_delta = 1;
d0_cpu_delta = (d0_cpu_now - d0_cpu_last)/1000;
d1_cpu_delta = (d1_cpu_now - d1_cpu_last)/1000;
if ( print )
DPRINTF("delta %lldms, dom0 %d%%, target %d%%, sent %dMb/s, "
"dirtied %dMb/s %" PRId32 " pages\n",
wall_delta,
(int)((d0_cpu_delta*100)/wall_delta),
(int)((d1_cpu_delta*100)/wall_delta),
(int)((pages_sent*PAGE_SIZE)/(wall_delta*(1000/8))),
(int)((stats->dirty_count*PAGE_SIZE)/(wall_delta*(1000/8))),
stats->dirty_count);
d0_cpu_last = d0_cpu_now;
d1_cpu_last = d1_cpu_now;
wall_last = wall_now;
return 0;
}
static int analysis_phase(int xc_handle, uint32_t domid, int pfn_array_size,
unsigned long *arr, int runs)
{
long long start, now;
xc_shadow_op_stats_t stats;
int j;
start = llgettimeofday();
for ( j = 0; j < runs; j++ )
{
int i;
xc_shadow_control(xc_handle, domid, XEN_DOMCTL_SHADOW_OP_CLEAN,
arr, pfn_array_size, NULL, 0, NULL);
DPRINTF("#Flush\n");
for ( i = 0; i < 40; i++ )
{
usleep(50000);
now = llgettimeofday();
xc_shadow_control(xc_handle, domid, XEN_DOMCTL_SHADOW_OP_PEEK,
NULL, 0, NULL, 0, &stats);
DPRINTF("now= %lld faults= %"PRId32" dirty= %"PRId32"\n",
((now-start)+500)/1000,
stats.fault_count, stats.dirty_count);
}
}
return -1;
}
static int suspend_and_state(int (*suspend)(int), int xc_handle, int io_fd,
int dom, xc_dominfo_t *info,
vcpu_guest_context_t *ctxt)
{
int i = 0;
if ( !(*suspend)(dom) )
{
ERROR("Suspend request failed");
return -1;
}
retry:
if ( xc_domain_getinfo(xc_handle, dom, 1, info) != 1 )
{
ERROR("Could not get domain info");
return -1;
}
if ( xc_vcpu_getcontext(xc_handle, dom, 0, ctxt) )
ERROR("Could not get vcpu context");
if ( info->shutdown && (info->shutdown_reason == SHUTDOWN_suspend) )
return 0; /* success */
if ( info->paused )
{
/* Try unpausing domain, wait, and retest. */
xc_domain_unpause( xc_handle, dom );
ERROR("Domain was paused. Wait and re-test.");
usleep(10000); /* 10ms */
goto retry;
}
if ( ++i < 100 )
{
ERROR("Retry suspend domain.");
usleep(10000); /* 10ms */
goto retry;
}
ERROR("Unable to suspend domain.");
return -1;
}
int xc_hvm_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
uint32_t max_factor, uint32_t flags, int (*suspend)(int),
void *(*init_qemu_maps)(int, unsigned),
void (*qemu_flip_buffer)(int, int))
{
xc_dominfo_t info;
int rc = 1, i, j, last_iter, iter = 0;
int live = !!(flags & XCFLAGS_LIVE);
int debug = !!(flags & XCFLAGS_DEBUG);
int sent_last_iter, skip_this_iter;
/* The highest guest-physical frame number used by the current guest */
unsigned long max_pfn;
/* The size of an array big enough to contain all guest pfns */
unsigned long pfn_array_size;
/* Magic frames: ioreqs and xenstore comms. */
uint64_t magic_pfns[3]; /* ioreq_pfn, bufioreq_pfn, store_pfn */
/* A copy of the CPU context of the guest. */
vcpu_guest_context_t ctxt;
/* A table containg the PFNs (/not/ MFN!) to map. */
xen_pfn_t *pfn_batch = NULL;
/* A copy of hvm domain context buffer*/
uint32_t hvm_buf_size;
uint8_t *hvm_buf = NULL;
/* base of the region in which domain memory is mapped */
unsigned char *region_base = NULL;
uint32_t rec_size, nr_vcpus;
/* power of 2 order of pfn_array_size */
int order_nr;
/* bitmap of pages:
- that should be sent this iteration (unless later marked as skip);
- to skip this iteration because already dirty; */
unsigned long *to_send = NULL, *to_skip = NULL;
xc_shadow_op_stats_t stats;
unsigned long total_sent = 0;
uint64_t vcpumap = 1ULL;
DPRINTF("xc_hvm_save: dom=%d, max_iters=%d, max_factor=%d, flags=0x%x, "
"live=%d, debug=%d.\n", dom, max_iters, max_factor, flags,
live, debug);
/* If no explicit control parameters given, use defaults */
max_iters = max_iters ? : DEF_MAX_ITERS;
max_factor = max_factor ? : DEF_MAX_FACTOR;
initialize_mbit_rate();
if ( xc_domain_getinfo(xc_handle, dom, 1, &info) != 1 )
{
ERROR("HVM: Could not get domain info");
return 1;
}
nr_vcpus = info.nr_online_vcpus;
if ( mlock(&ctxt, sizeof(ctxt)) )
{
ERROR("HVM: Unable to mlock ctxt");
return 1;
}
/* Only have to worry about vcpu 0 even for SMP */
if ( xc_vcpu_getcontext(xc_handle, dom, 0, &ctxt) )
{
ERROR("HVM: Could not get vcpu context");
goto out;
}
DPRINTF("saved hvm domain info: max_memkb=0x%lx, nr_pages=0x%lx\n",
info.max_memkb, info.nr_pages);
if ( live )
{
/* Live suspend. Enable log-dirty mode. */
if ( xc_shadow_control(xc_handle, dom,
XEN_DOMCTL_SHADOW_OP_ENABLE_LOGDIRTY,
NULL, 0, NULL, 0, NULL) < 0 )
{
ERROR("Couldn't enable shadow mode");
goto out;
}
}
else
{
/* This is a non-live suspend. Suspend the domain .*/
if ( suspend_and_state(suspend, xc_handle, io_fd, dom, &info, &ctxt) )
{
ERROR("HVM Domain appears not to have suspended");
goto out;
}
}
last_iter = !live;
max_pfn = xc_memory_op(xc_handle, XENMEM_maximum_gpfn, &dom);
DPRINTF("after 1st handle hvm domain max_pfn=0x%lx, "
"max_memkb=0x%lx, live=%d.\n",
max_pfn, info.max_memkb, live);
/* Size of any array that covers 0 ... max_pfn */
pfn_array_size = max_pfn + 1;
if ( !write_exact(io_fd, &pfn_array_size, sizeof(unsigned long)) )
{
ERROR("Error when writing to state file (1)");
goto out;
}
/* pretend we sent all the pages last iteration */
sent_last_iter = pfn_array_size;
/* calculate the power of 2 order of pfn_array_size, e.g.
15->4 16->4 17->5 */
for ( i = pfn_array_size-1, order_nr = 0; i ; i >>= 1, order_nr++ )
continue;
/* Setup to_send / to_fix and to_skip bitmaps */
to_send = malloc(BITMAP_SIZE);
to_skip = malloc(BITMAP_SIZE);
if ( live )
{
/* Get qemu-dm logging dirty pages too */
void *seg = init_qemu_maps(dom, BITMAP_SIZE);
qemu_bitmaps[0] = seg;
qemu_bitmaps[1] = seg + BITMAP_SIZE;
qemu_active = 0;
qemu_non_active = 1;
}
hvm_buf_size = xc_domain_hvm_getcontext(xc_handle, dom, 0, 0);
if ( hvm_buf_size == -1 )
{
ERROR("Couldn't get HVM context size from Xen");
goto out;
}
hvm_buf = malloc(hvm_buf_size);
if ( !to_send || !to_skip || !hvm_buf )
{
ERROR("Couldn't allocate memory");
goto out;
}
memset(to_send, 0xff, BITMAP_SIZE);
if ( lock_pages(to_send, BITMAP_SIZE) )
{
ERROR("Unable to lock to_send");
return 1;
}
/* (to fix is local only) */
if ( lock_pages(to_skip, BITMAP_SIZE) )
{
ERROR("Unable to lock to_skip");
return 1;
}
analysis_phase(xc_handle, dom, pfn_array_size, to_skip, 0);
/* We want zeroed memory so use calloc rather than malloc. */
pfn_batch = calloc(MAX_BATCH_SIZE, sizeof(*pfn_batch));
if ( pfn_batch == NULL )
{
ERROR("failed to alloc memory for pfn_batch array");
errno = ENOMEM;
goto out;
}
for ( ; ; )
{
unsigned int prev_pc, sent_this_iter, N, batch;
iter++;
sent_this_iter = 0;
skip_this_iter = 0;
prev_pc = 0;
N=0;
DPRINTF("Saving memory pages: iter %d 0%%", iter);
while ( N < pfn_array_size )
{
unsigned int this_pc = (N * 100) / pfn_array_size;
int rc;
if ( (this_pc - prev_pc) >= 5 )
{
DPRINTF("\b\b\b\b%3d%%", this_pc);
prev_pc = this_pc;
}
if ( !last_iter )
{
/* Slightly wasteful to peek the whole array evey time,
but this is fast enough for the moment. */
rc = xc_shadow_control(
xc_handle, dom, XEN_DOMCTL_SHADOW_OP_PEEK, to_skip,
pfn_array_size, NULL, 0, NULL);
if ( rc != pfn_array_size )
{
ERROR("Error peeking shadow bitmap");
goto out;
}
}
/* load pfn_batch[] with the mfn of all the pages we're doing in
this batch. */
for ( batch = 0;
(batch < MAX_BATCH_SIZE) && (N < pfn_array_size);
N++ )
{
int n = permute(N, pfn_array_size, order_nr);
if ( 0 && debug )
DPRINTF("%d pfn= %08lx %d \n",
iter, (unsigned long)n, test_bit(n, to_send));
if ( !last_iter &&
test_bit(n, to_send) &&
test_bit(n, to_skip) )
skip_this_iter++; /* stats keeping */
if ( !((test_bit(n, to_send) && !test_bit(n, to_skip)) ||
(test_bit(n, to_send) && last_iter)) )
continue;
/* Skip PFNs that aren't really there */
if ( (n >= 0xa0 && n < 0xc0) /* VGA hole */
|| (n >= (HVM_BELOW_4G_MMIO_START >> PAGE_SHIFT) &&
n < (1ULL << 32) >> PAGE_SHIFT) /* 4G MMIO hole */ )
continue;
/*
** we get here if:
** 1. page is marked to_send & hasn't already been re-dirtied
** 2. (ignore to_skip in last iteration)
*/
pfn_batch[batch] = n;
batch++;
}
if ( batch == 0 )
goto skip; /* vanishingly unlikely... */
region_base = xc_map_foreign_batch(
xc_handle, dom, PROT_READ, pfn_batch, batch);
if ( region_base == 0 )
{
ERROR("map batch failed");
goto out;
}
/* write num of pfns */
if ( !write_exact(io_fd, &batch, sizeof(unsigned int)) )
{
ERROR("Error when writing to state file (2)");
goto out;
}
/* write all the pfns */
if ( !write_exact(io_fd, pfn_batch, sizeof(unsigned long)*batch) )
{
ERROR("Error when writing to state file (3)");
goto out;
}
for ( j = 0; j < batch; j++ )
{
if ( pfn_batch[j] & XEN_DOMCTL_PFINFO_LTAB_MASK )
continue;
if ( ratewrite(io_fd, region_base + j*PAGE_SIZE,
PAGE_SIZE) != PAGE_SIZE )
{
ERROR("ERROR when writing to state file (4)");
goto out;
}
}
sent_this_iter += batch;
munmap(region_base, batch*PAGE_SIZE);
} /* end of this while loop for this iteration */
skip:
total_sent += sent_this_iter;
DPRINTF("\r %d: sent %d, skipped %d, ",
iter, sent_this_iter, skip_this_iter );
if ( last_iter )
{
print_stats( xc_handle, dom, sent_this_iter, &stats, 1);
DPRINTF("Total pages sent= %ld (%.2fx)\n",
total_sent, ((float)total_sent)/pfn_array_size );
}
if ( last_iter && debug )
{
int minusone = -1;
memset(to_send, 0xff, BITMAP_SIZE);
debug = 0;
DPRINTF("Entering debug resend-all mode\n");
/* send "-1" to put receiver into debug mode */
if ( !write_exact(io_fd, &minusone, sizeof(int)) )
{
ERROR("Error when writing to state file (6)");
goto out;
}
continue;
}
if ( last_iter )
break;
if ( live )
{
if ( ((sent_this_iter > sent_last_iter) && RATE_IS_MAX()) ||
(iter >= max_iters) ||
(sent_this_iter+skip_this_iter < 50) ||
(total_sent > pfn_array_size*max_factor) )
{
DPRINTF("Start last iteration for HVM domain\n");
last_iter = 1;
if ( suspend_and_state(suspend, xc_handle, io_fd, dom, &info,
&ctxt))
{
ERROR("Domain appears not to have suspended");
goto out;
}
DPRINTF("SUSPEND eip %08lx edx %08lx\n",
(unsigned long)ctxt.user_regs.eip,
(unsigned long)ctxt.user_regs.edx);
}
if ( xc_shadow_control(xc_handle, dom,
XEN_DOMCTL_SHADOW_OP_CLEAN, to_send,
pfn_array_size, NULL,
0, &stats) != pfn_array_size )
{
ERROR("Error flushing shadow PT");
goto out;
}
/* Pull in the dirty bits from qemu too */
if ( !last_iter )
{
qemu_active = qemu_non_active;
qemu_non_active = qemu_active ? 0 : 1;
qemu_flip_buffer(dom, qemu_active);
for ( j = 0; j < BITMAP_SIZE / sizeof(unsigned long); j++ )
{
to_send[j] |= qemu_bitmaps[qemu_non_active][j];
qemu_bitmaps[qemu_non_active][j] = 0;
}
}
else
{
for ( j = 0; j < BITMAP_SIZE / sizeof(unsigned long); j++ )
to_send[j] |= qemu_bitmaps[qemu_active][j];
}
sent_last_iter = sent_this_iter;
print_stats(xc_handle, dom, sent_this_iter, &stats, 1);
}
} /* end of while 1 */
DPRINTF("All HVM memory is saved\n");
{
struct {
int minustwo;
int max_vcpu_id;
uint64_t vcpumap;
} chunk = { -2, info.max_vcpu_id };
if (info.max_vcpu_id >= 64) {
ERROR("Too many VCPUS in guest!");
goto out;
}
for (i = 1; i <= info.max_vcpu_id; i++) {
xc_vcpuinfo_t vinfo;
if ((xc_vcpu_getinfo(xc_handle, dom, i, &vinfo) == 0) &&
vinfo.online)
vcpumap |= 1ULL << i;
}
chunk.vcpumap = vcpumap;
if(!write_exact(io_fd, &chunk, sizeof(chunk))) {
ERROR("Error when writing to state file (errno %d)", errno);
goto out;
}
}
/* Zero terminate */
i = 0;
if ( !write_exact(io_fd, &i, sizeof(int)) )
{
ERROR("Error when writing to state file (6)");
goto out;
}
/* Save magic-page locations. */
memset(magic_pfns, 0, sizeof(magic_pfns));
xc_get_hvm_param(xc_handle, dom, HVM_PARAM_IOREQ_PFN,
(unsigned long *)&magic_pfns[0]);
xc_get_hvm_param(xc_handle, dom, HVM_PARAM_BUFIOREQ_PFN,
(unsigned long *)&magic_pfns[1]);
xc_get_hvm_param(xc_handle, dom, HVM_PARAM_STORE_PFN,
(unsigned long *)&magic_pfns[2]);
if ( !write_exact(io_fd, magic_pfns, sizeof(magic_pfns)) )
{
ERROR("Error when writing to state file (7)");
goto out;
}
/* save vcpu/vmcs contexts */
for ( i = 0; i < nr_vcpus; i++ )
{
if ( !(vcpumap & (1ULL << i)) )
continue;
if ( xc_vcpu_getcontext(xc_handle, dom, i, &ctxt) )
{
ERROR("HVM:Could not get vcpu context");
goto out;
}
DPRINTF("write vcpu %d context.\n", i);
if ( !write_exact(io_fd, &(ctxt), sizeof(ctxt)) )
{
ERROR("write vcpu context failed!\n");
goto out;
}
}
if ( (rec_size = xc_domain_hvm_getcontext(xc_handle, dom, hvm_buf,
hvm_buf_size)) == -1 )
{
ERROR("HVM:Could not get hvm buffer");
goto out;
}
if ( !write_exact(io_fd, &rec_size, sizeof(uint32_t)) )
{
ERROR("error write hvm buffer size");
goto out;
}
if ( !write_exact(io_fd, hvm_buf, rec_size) )
{
ERROR("write HVM info failed!\n");
goto out;
}
/* Success! */
rc = 0;
out:
if ( live )
{
if ( xc_shadow_control(xc_handle, dom, XEN_DOMCTL_SHADOW_OP_OFF,
NULL, 0, NULL, 0, NULL) < 0 )
DPRINTF("Warning - couldn't disable shadow mode");
}
free(hvm_buf);
free(pfn_batch);
free(to_send);
free(to_skip);
return !!rc;
}
tools/libxc/xenguest.h
+6 -13
View File
@@ -16,26 +16,19 @@
/**
* This function will save a domain running Linux.
* This function will save a running domain.
*
* @parm xc_handle a handle to an open hypervisor interface
* @parm fd the file descriptor to save a domain to
* @parm dom the id of the domain
* @return 0 on success, -1 on failure
*/
int xc_linux_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
uint32_t max_factor, uint32_t flags /* XCFLAGS_xxx */,
int (*suspend)(int domid));
int xc_domain_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
uint32_t max_factor, uint32_t flags /* XCFLAGS_xxx */,
int (*suspend)(int domid), int hvm,
void *(*init_qemu_maps)(int, unsigned), /* HVM only */
void (*qemu_flip_buffer)(int, int)); /* HVM only */
/**
* This function will save a hvm domain running unmodified guest.
* @return 0 on success, -1 on failure
*/
int xc_hvm_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
uint32_t max_factor, uint32_t flags /* XCFLAGS_xxx */,
int (*suspend)(int domid),
void *(*init_qemu_maps)(int, unsigned),
void (*qemu_flip_buffer)(int, int));
/**
* This function will restore a saved domain.
tools/libxc/xg_private.c
-11
View File
@@ -198,17 +198,6 @@ __attribute__((weak))
return -1;
}
__attribute__((weak))
int xc_hvm_save(int xc_handle, int io_fd, uint32_t dom, uint32_t max_iters,
uint32_t max_factor, uint32_t flags,
int (*suspend)(int domid),
void *(*init_qemu_maps)(int, unsigned),
void (*qemu_flip_buffer)(int, int))
{
errno = ENOSYS;
return -1;
}
__attribute__((weak)) int xc_get_hvm_param(
int handle, domid_t dom, int param, unsigned long *value)
{
tools/xcutils/xc_save.c
+3 -6
View File
@@ -174,12 +174,9 @@ main(int argc, char **argv)
max_f = atoi(argv[4]);
flags = atoi(argv[5]);
if (flags & XCFLAGS_HVM)
ret = xc_hvm_save(xc_fd, io_fd, domid, maxit, max_f, flags,
&suspend, &init_qemu_maps, &qemu_flip_buffer);
else
ret = xc_linux_save(xc_fd, io_fd, domid, maxit, max_f, flags,
&suspend);
ret = xc_domain_save(xc_fd, io_fd, domid, maxit, max_f, flags,
&suspend, !!(flags & XCFLAGS_HVM),
&init_qemu_maps, &qemu_flip_buffer);
xc_interface_close(xc_fd);
Reference in new issue
xen-project/xen
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