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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v10 09/15] tools/libxc: x86 PV restore code
Restore the x86 PV specific parts. The X86_PV_INFO, the P2M_FRAMES,
SHARED_INFO, and VCPU context records.
The localise_page callback is called from the common PAGE_DATA code to convert
PFNs in page tables to MFNs.
Page tables are pinned and the guest's P2M is updated when the stream is
complete.
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CC: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
CC: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
---
tools/libxc/Makefile | 1 +
tools/libxc/xc_sr_common.h | 10 +
tools/libxc/xc_sr_restore.c | 125 ++++
tools/libxc/xc_sr_restore_x86_pv.c | 1165 ++++++++++++++++++++++++++++++++++++
4 files changed, 1301 insertions(+)
create mode 100644 tools/libxc/xc_sr_restore_x86_pv.c
diff --git a/tools/libxc/Makefile b/tools/libxc/Makefile
index 40ba91c..b301432 100644
--- a/tools/libxc/Makefile
+++ b/tools/libxc/Makefile
@@ -57,6 +57,7 @@ GUEST_SRCS-y += xc_domain_restore.c xc_domain_save.c
GUEST_SRCS-y += xc_sr_common.c
GUEST_SRCS-$(CONFIG_X86) += xc_sr_common_x86.c
GUEST_SRCS-$(CONFIG_X86) += xc_sr_common_x86_pv.c
+GUEST_SRCS-$(CONFIG_X86) += xc_sr_restore_x86_pv.c
GUEST_SRCS-$(CONFIG_X86) += xc_sr_save_x86_pv.c
GUEST_SRCS-y += xc_sr_restore.c
GUEST_SRCS-y += xc_sr_save.c
diff --git a/tools/libxc/xc_sr_common.h b/tools/libxc/xc_sr_common.h
index 2f0f00b..7d3d54f 100644
--- a/tools/libxc/xc_sr_common.h
+++ b/tools/libxc/xc_sr_common.h
@@ -287,6 +287,8 @@ struct xc_sr_context
extern struct xc_sr_save_ops save_ops_x86_pv;
+extern struct xc_sr_restore_ops restore_ops_x86_pv;
+
struct xc_sr_record
{
uint32_t type;
@@ -321,6 +323,14 @@ static inline int write_record(struct xc_sr_context *ctx,
return write_split_record(ctx, rec, NULL, 0);
}
+/*
+ * This would ideally be private in restore.c, but is needed by
+ * x86_pv_localise_page() if we receive pagetables frames ahead of the
+ * contents of the frames they point at.
+ */
+int populate_pfns(struct xc_sr_context *ctx, unsigned count,
+ const xen_pfn_t *original_pfns, const uint32_t *types);
+
#endif
/*
* Local variables:
diff --git a/tools/libxc/xc_sr_restore.c b/tools/libxc/xc_sr_restore.c
index cdebc69..045f486 100644
--- a/tools/libxc/xc_sr_restore.c
+++ b/tools/libxc/xc_sr_restore.c
@@ -1,5 +1,130 @@
#include "xc_sr_common.h"
+/*
+ * Is a pfn populated?
+ */
+static bool pfn_is_populated(const struct xc_sr_context *ctx, xen_pfn_t pfn)
+{
+ if ( pfn > ctx->restore.max_populated_pfn )
+ return false;
+ return test_bit(pfn, ctx->restore.populated_pfns);
+}
+
+/*
+ * Set a pfn as populated, expanding the tracking structures if needed. To
+ * avoid realloc()ing too excessivly, the size increased to the nearest power
+ * of two large enough to contain the required pfn.
+ */
+static int pfn_set_populated(struct xc_sr_context *ctx, xen_pfn_t pfn)
+{
+ xc_interface *xch = ctx->xch;
+
+ if ( pfn > ctx->restore.max_populated_pfn )
+ {
+ xen_pfn_t new_max;
+ size_t old_sz, new_sz;
+ unsigned long *p;
+
+ /* Round up to the nearest power of two larger than pfn, less 1. */
+ new_max = pfn;
+ new_max |= new_max >> 1;
+ new_max |= new_max >> 2;
+ new_max |= new_max >> 4;
+ new_max |= new_max >> 8;
+ new_max |= new_max >> 16;
+#ifdef __x86_64__
+ new_max |= new_max >> 32;
+#endif
+
+ old_sz = bitmap_size(ctx->restore.max_populated_pfn + 1);
+ new_sz = bitmap_size(new_max + 1);
+ p = realloc(ctx->restore.populated_pfns, new_sz);
+ if ( !p )
+ {
+ ERROR("Failed to realloc populated bitmap");
+ errno = ENOMEM;
+ return -1;
+ }
+
+ memset((uint8_t *)p + old_sz, 0x00, new_sz - old_sz);
+
+ ctx->restore.populated_pfns = p;
+ ctx->restore.max_populated_pfn = new_max;
+ }
+
+ set_bit(pfn, ctx->restore.populated_pfns);
+
+ return 0;
+}
+
+/*
+ * Given a set of pfns, obtain memory from Xen to fill the physmap for the
+ * unpopulated subset. If types is NULL, no page typechecking is performed
+ * and all unpopulated pfns are populated.
+ */
+int populate_pfns(struct xc_sr_context *ctx, unsigned count,
+ const xen_pfn_t *original_pfns, const uint32_t *types)
+{
+ xc_interface *xch = ctx->xch;
+ xen_pfn_t *mfns = malloc(count * sizeof(*mfns)),
+ *pfns = malloc(count * sizeof(*pfns));
+ unsigned i, nr_pfns = 0;
+ int rc = -1;
+
+ if ( !mfns || !pfns )
+ {
+ ERROR("Failed to allocate %zu bytes for populating the physmap",
+ 2 * count * sizeof(*mfns));
+ goto err;
+ }
+
+ for ( i = 0; i < count; ++i )
+ {
+ if ( (!types || (types &&
+ (types[i] != XEN_DOMCTL_PFINFO_XTAB &&
+ types[i] != XEN_DOMCTL_PFINFO_BROKEN))) &&
+ !pfn_is_populated(ctx, original_pfns[i]) )
+ {
+ pfns[nr_pfns] = mfns[nr_pfns] = original_pfns[i];
+ ++nr_pfns;
+ }
+ }
+
+ if ( nr_pfns )
+ {
+ rc = xc_domain_populate_physmap_exact(
+ xch, ctx->domid, nr_pfns, 0, 0, mfns);
+ if ( rc )
+ {
+ PERROR("Failed to populate physmap");
+ goto err;
+ }
+
+ for ( i = 0; i < nr_pfns; ++i )
+ {
+ if ( mfns[i] == INVALID_MFN )
+ {
+ ERROR("Populate physmap failed for pfn %u", i);
+ rc = -1;
+ goto err;
+ }
+
+ rc = pfn_set_populated(ctx, pfns[i]);
+ if ( rc )
+ goto err;
+ ctx->restore.ops.set_gfn(ctx, pfns[i], mfns[i]);
+ }
+ }
+
+ rc = 0;
+
+ err:
+ free(pfns);
+ free(mfns);
+
+ return rc;
+}
+
int xc_domain_restore2(xc_interface *xch, int io_fd, uint32_t dom,
unsigned int store_evtchn, unsigned long *store_mfn,
domid_t store_domid, unsigned int console_evtchn,
diff --git a/tools/libxc/xc_sr_restore_x86_pv.c
b/tools/libxc/xc_sr_restore_x86_pv.c
new file mode 100644
index 0000000..ef26c64
--- /dev/null
+++ b/tools/libxc/xc_sr_restore_x86_pv.c
@@ -0,0 +1,1165 @@
+#include <assert.h>
+
+#include "xc_sr_common_x86_pv.h"
+
+static xen_pfn_t pfn_to_mfn(const struct xc_sr_context *ctx, xen_pfn_t pfn)
+{
+ assert(pfn <= ctx->x86_pv.max_pfn);
+
+ return xc_pfn_to_mfn(pfn, ctx->x86_pv.p2m, ctx->x86_pv.width);
+}
+
+/*
+ * Expand our local tracking information for the p2m table and domains maximum
+ * size. Normally this will be called once to expand from 0 to max_pfn, but
+ * is liable to expand multiple times if the domain grows on the sending side
+ * after migration has started.
+ */
+static int expand_p2m(struct xc_sr_context *ctx, unsigned long max_pfn)
+{
+ xc_interface *xch = ctx->xch;
+ unsigned long old_max = ctx->x86_pv.max_pfn, i;
+ unsigned int fpp = PAGE_SIZE / ctx->x86_pv.width;
+ unsigned long end_frame = (max_pfn / fpp) + 1;
+ unsigned long old_end_frame = (old_max / fpp) + 1;
+ xen_pfn_t *p2m = NULL, *p2m_pfns = NULL;
+ uint32_t *pfn_types = NULL;
+ size_t p2msz, p2m_pfnsz, pfn_typesz;
+
+ assert(max_pfn > old_max);
+
+ p2msz = (max_pfn + 1) * ctx->x86_pv.width;
+ p2m = realloc(ctx->x86_pv.p2m, p2msz);
+ if ( !p2m )
+ {
+ ERROR("Failed to (re)alloc %zu bytes for p2m", p2msz);
+ return -1;
+ }
+ ctx->x86_pv.p2m = p2m;
+
+ pfn_typesz = (max_pfn + 1) * sizeof(*pfn_types);
+ pfn_types = realloc(ctx->x86_pv.restore.pfn_types, pfn_typesz);
+ if ( !pfn_types )
+ {
+ ERROR("Failed to (re)alloc %zu bytes for pfn_types", pfn_typesz);
+ return -1;
+ }
+ ctx->x86_pv.restore.pfn_types = pfn_types;
+
+ p2m_pfnsz = (end_frame + 1) * sizeof(*p2m_pfns);
+ p2m_pfns = realloc(ctx->x86_pv.p2m_pfns, p2m_pfnsz);
+ if ( !p2m_pfns )
+ {
+ ERROR("Failed to (re)alloc %zu bytes for p2m frame list", p2m_pfnsz);
+ return -1;
+ }
+ ctx->x86_pv.p2m_frames = end_frame;
+ ctx->x86_pv.p2m_pfns = p2m_pfns;
+
+ ctx->x86_pv.max_pfn = max_pfn;
+ for ( i = (old_max ? old_max + 1 : 0); i <= max_pfn; ++i )
+ {
+ ctx->restore.ops.set_gfn(ctx, i, INVALID_MFN);
+ ctx->restore.ops.set_page_type(ctx, i, 0);
+ }
+
+ for ( i = (old_end_frame ? old_end_frame + 1 : 0); i <= end_frame; ++i )
+ ctx->x86_pv.p2m_pfns[i] = INVALID_MFN;
+
+ DPRINTF("Expanded p2m from %#lx to %#lx", old_max, max_pfn);
+ return 0;
+}
+
+/*
+ * Pin all of the pagetables.
+ */
+static int pin_pagetables(struct xc_sr_context *ctx)
+{
+ xc_interface *xch = ctx->xch;
+ unsigned long i, nr_pins;
+ struct mmuext_op pin[MAX_PIN_BATCH];
+
+ for ( i = nr_pins = 0; i <= ctx->x86_pv.max_pfn; ++i )
+ {
+ if ( (ctx->x86_pv.restore.pfn_types[i] &
+ XEN_DOMCTL_PFINFO_LPINTAB) == 0 )
+ continue;
+
+ switch ( (ctx->x86_pv.restore.pfn_types[i] &
+ XEN_DOMCTL_PFINFO_LTABTYPE_MASK) )
+ {
+ case XEN_DOMCTL_PFINFO_L1TAB:
+ pin[nr_pins].cmd = MMUEXT_PIN_L1_TABLE;
+ break;
+ case XEN_DOMCTL_PFINFO_L2TAB:
+ pin[nr_pins].cmd = MMUEXT_PIN_L2_TABLE;
+ break;
+ case XEN_DOMCTL_PFINFO_L3TAB:
+ pin[nr_pins].cmd = MMUEXT_PIN_L3_TABLE;
+ break;
+ case XEN_DOMCTL_PFINFO_L4TAB:
+ pin[nr_pins].cmd = MMUEXT_PIN_L4_TABLE;
+ break;
+ default:
+ continue;
+ }
+
+ pin[nr_pins].arg1.mfn = pfn_to_mfn(ctx, i);
+ nr_pins++;
+
+ if ( nr_pins == MAX_PIN_BATCH )
+ {
+ if ( xc_mmuext_op(xch, pin, nr_pins, ctx->domid) != 0 )
+ {
+ PERROR("Failed to pin batch of pagetables");
+ return -1;
+ }
+ nr_pins = 0;
+ }
+ }
+
+ if ( (nr_pins > 0) && (xc_mmuext_op(xch, pin, nr_pins, ctx->domid) < 0) )
+ {
+ PERROR("Failed to pin batch of pagetables");
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Update details in a guests start_info structure.
+ */
+static int process_start_info(struct xc_sr_context *ctx,
+ vcpu_guest_context_any_t *vcpu)
+{
+ xc_interface *xch = ctx->xch;
+ xen_pfn_t pfn, mfn;
+ start_info_any_t *guest_start_info = NULL;
+ int rc = -1;
+
+ pfn = GET_FIELD(vcpu, user_regs.edx, ctx->x86_pv.width);
+
+ if ( pfn > ctx->x86_pv.max_pfn )
+ {
+ ERROR("Start Info pfn %#lx out of range", pfn);
+ goto err;
+ }
+ else if ( ctx->x86_pv.restore.pfn_types[pfn] != XEN_DOMCTL_PFINFO_NOTAB )
+ {
+ ERROR("Start Info pfn %#lx has bad type %u", pfn,
+ (ctx->x86_pv.restore.pfn_types[pfn] >>
+ XEN_DOMCTL_PFINFO_LTAB_SHIFT));
+ goto err;
+ }
+
+ mfn = pfn_to_mfn(ctx, pfn);
+ if ( !mfn_in_pseudophysmap(ctx, mfn) )
+ {
+ ERROR("Start Info has bad mfn");
+ dump_bad_pseudophysmap_entry(ctx, mfn);
+ goto err;
+ }
+
+ SET_FIELD(vcpu, user_regs.edx, mfn, ctx->x86_pv.width);
+ guest_start_info = xc_map_foreign_range(
+ xch, ctx->domid, PAGE_SIZE, PROT_READ | PROT_WRITE, mfn);
+ if ( !guest_start_info )
+ {
+ PERROR("Failed to map Start Info at mfn %#lx", mfn);
+ goto err;
+ }
+
+ /* Deal with xenstore stuff */
+ pfn = GET_FIELD(guest_start_info, store_mfn, ctx->x86_pv.width);
+ if ( pfn > ctx->x86_pv.max_pfn )
+ {
+ ERROR("XenStore pfn %#lx out of range", pfn);
+ goto err;
+ }
+
+ mfn = pfn_to_mfn(ctx, pfn);
+ if ( !mfn_in_pseudophysmap(ctx, mfn) )
+ {
+ ERROR("XenStore pfn has bad mfn");
+ dump_bad_pseudophysmap_entry(ctx, mfn);
+ goto err;
+ }
+
+ ctx->restore.xenstore_gfn = mfn;
+ SET_FIELD(guest_start_info, store_mfn, mfn, ctx->x86_pv.width);
+ SET_FIELD(guest_start_info, store_evtchn,
+ ctx->restore.xenstore_evtchn, ctx->x86_pv.width);
+
+ /* Deal with console stuff */
+ pfn = GET_FIELD(guest_start_info, console.domU.mfn, ctx->x86_pv.width);
+ if ( pfn > ctx->x86_pv.max_pfn )
+ {
+ ERROR("Console pfn %#lx out of range", pfn);
+ goto err;
+ }
+
+ mfn = pfn_to_mfn(ctx, pfn);
+ if ( !mfn_in_pseudophysmap(ctx, mfn) )
+ {
+ ERROR("Console pfn has bad mfn");
+ dump_bad_pseudophysmap_entry(ctx, mfn);
+ goto err;
+ }
+
+ ctx->restore.console_gfn = mfn;
+ SET_FIELD(guest_start_info, console.domU.mfn, mfn, ctx->x86_pv.width);
+ SET_FIELD(guest_start_info, console.domU.evtchn,
+ ctx->restore.console_evtchn, ctx->x86_pv.width);
+
+ /* Set other information */
+ SET_FIELD(guest_start_info, nr_pages,
+ ctx->x86_pv.max_pfn + 1, ctx->x86_pv.width);
+ SET_FIELD(guest_start_info, shared_info,
+ ctx->dominfo.shared_info_frame << PAGE_SHIFT, ctx->x86_pv.width);
+ SET_FIELD(guest_start_info, flags, 0, ctx->x86_pv.width);
+
+ rc = 0;
+
+err:
+ if ( guest_start_info )
+ munmap(guest_start_info, PAGE_SIZE);
+
+ return rc;
+}
+
+/*
+ * Process one stashed vcpu worth of basic state and send to Xen.
+ */
+static int process_vcpu_basic(struct xc_sr_context *ctx,
+ unsigned int vcpuid)
+{
+ xc_interface *xch = ctx->xch;
+ vcpu_guest_context_any_t vcpu;
+ xen_pfn_t pfn, mfn;
+ unsigned i, gdt_count;
+ int rc = -1;
+
+ memcpy(&vcpu, ctx->x86_pv.restore.vcpus[vcpuid].basic,
+ ctx->x86_pv.restore.vcpus[vcpuid].basicsz);
+
+ /* Vcpu 0 is special: Convert the suspend record to an mfn. */
+ if ( vcpuid == 0 )
+ {
+ rc = process_start_info(ctx, &vcpu);
+ if ( rc )
+ return rc;
+ rc = -1;
+ }
+
+ SET_FIELD(&vcpu, flags,
+ GET_FIELD(&vcpu, flags, ctx->x86_pv.width) | VGCF_online,
+ ctx->x86_pv.width);
+
+ gdt_count = GET_FIELD(&vcpu, gdt_ents, ctx->x86_pv.width);
+ if ( gdt_count > FIRST_RESERVED_GDT_ENTRY )
+ {
+ ERROR("GDT entry count (%u) out of range (max %u)",
+ gdt_count, FIRST_RESERVED_GDT_ENTRY);
+ errno = ERANGE;
+ goto err;
+ }
+ gdt_count = (gdt_count + 511) / 512; /* gdt_count now in units of frames.
*/
+
+ /* Convert GDT frames to mfns. */
+ for ( i = 0; i < gdt_count; ++i )
+ {
+ pfn = GET_FIELD(&vcpu, gdt_frames[i], ctx->x86_pv.width);
+ if ( pfn > ctx->x86_pv.max_pfn )
+ {
+ ERROR("GDT frame %u (pfn %#lx) out of range", i, pfn);
+ goto err;
+ }
+ else if ( (ctx->x86_pv.restore.pfn_types[pfn] !=
+ XEN_DOMCTL_PFINFO_NOTAB) )
+ {
+ ERROR("GDT frame %u (pfn %#lx) has bad type %u", i, pfn,
+ (ctx->x86_pv.restore.pfn_types[pfn] >>
+ XEN_DOMCTL_PFINFO_LTAB_SHIFT));
+ goto err;
+ }
+
+ mfn = pfn_to_mfn(ctx, pfn);
+ if ( !mfn_in_pseudophysmap(ctx, mfn) )
+ {
+ ERROR("GDT frame %u has bad mfn", i);
+ dump_bad_pseudophysmap_entry(ctx, mfn);
+ goto err;
+ }
+
+ SET_FIELD(&vcpu, gdt_frames[i], mfn, ctx->x86_pv.width);
+ }
+
+ /* Convert CR3 to an mfn. */
+ pfn = cr3_to_mfn(ctx, GET_FIELD(&vcpu, ctrlreg[3], ctx->x86_pv.width));
+ if ( pfn > ctx->x86_pv.max_pfn )
+ {
+ ERROR("cr3 (pfn %#lx) out of range", pfn);
+ goto err;
+ }
+ else if ( (ctx->x86_pv.restore.pfn_types[pfn] &
+ XEN_DOMCTL_PFINFO_LTABTYPE_MASK) !=
+ (((xen_pfn_t)ctx->x86_pv.levels) <<
+ XEN_DOMCTL_PFINFO_LTAB_SHIFT) )
+ {
+ ERROR("cr3 (pfn %#lx) has bad type %u, expected %u", pfn,
+ (ctx->x86_pv.restore.pfn_types[pfn] >>
+ XEN_DOMCTL_PFINFO_LTAB_SHIFT),
+ ctx->x86_pv.levels);
+ goto err;
+ }
+
+ mfn = pfn_to_mfn(ctx, pfn);
+ if ( !mfn_in_pseudophysmap(ctx, mfn) )
+ {
+ ERROR("cr3 has bad mfn");
+ dump_bad_pseudophysmap_entry(ctx, mfn);
+ goto err;
+ }
+
+ SET_FIELD(&vcpu, ctrlreg[3], mfn_to_cr3(ctx, mfn), ctx->x86_pv.width);
+
+ /* 64bit guests: Convert CR1 (guest pagetables) to mfn. */
+ if ( ctx->x86_pv.levels == 4 && (vcpu.x64.ctrlreg[1] & 1) )
+ {
+ pfn = vcpu.x64.ctrlreg[1] >> PAGE_SHIFT;
+
+ if ( pfn > ctx->x86_pv.max_pfn )
+ {
+ ERROR("cr1 (pfn %#lx) out of range", pfn);
+ goto err;
+ }
+ else if ( (ctx->x86_pv.restore.pfn_types[pfn] &
+ XEN_DOMCTL_PFINFO_LTABTYPE_MASK) !=
+ (((xen_pfn_t)ctx->x86_pv.levels) <<
+ XEN_DOMCTL_PFINFO_LTAB_SHIFT) )
+ {
+ ERROR("cr1 (pfn %#lx) has bad type %u, expected %u", pfn,
+ (ctx->x86_pv.restore.pfn_types[pfn] >>
+ XEN_DOMCTL_PFINFO_LTAB_SHIFT),
+ ctx->x86_pv.levels);
+ goto err;
+ }
+
+ mfn = pfn_to_mfn(ctx, pfn);
+ if ( !mfn_in_pseudophysmap(ctx, mfn) )
+ {
+ ERROR("cr1 has bad mfn");
+ dump_bad_pseudophysmap_entry(ctx, mfn);
+ goto err;
+ }
+
+ vcpu.x64.ctrlreg[1] = (uint64_t)mfn << PAGE_SHIFT;
+ }
+
+ if ( xc_vcpu_setcontext(xch, ctx->domid, vcpuid, &vcpu) )
+ {
+ PERROR("Failed to set vcpu%u's basic info", vcpuid);
+ goto err;
+ }
+
+ rc = 0;
+
+ err:
+ return rc;
+}
+
+/*
+ * Process one stashed vcpu worth of extended state and send to Xen.
+ */
+static int process_vcpu_extended(struct xc_sr_context *ctx,
+ unsigned int vcpuid)
+{
+ xc_interface *xch = ctx->xch;
+ struct xc_sr_x86_pv_restore_vcpu *vcpu =
+ &ctx->x86_pv.restore.vcpus[vcpuid];
+ DECLARE_DOMCTL;
+
+ domctl.cmd = XEN_DOMCTL_set_ext_vcpucontext;
+ domctl.domain = ctx->domid;
+ memcpy(&domctl.u.ext_vcpucontext, vcpu->extd, vcpu->extdsz);
+
+ if ( xc_domctl(xch, &domctl) != 0 )
+ {
+ PERROR("Failed to set vcpu%u's extended info", vcpuid);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Process one stashed vcpu worth of xsave state and send to Xen.
+ */
+static int process_vcpu_xsave(struct xc_sr_context *ctx,
+ unsigned int vcpuid)
+{
+ xc_interface *xch = ctx->xch;
+ struct xc_sr_x86_pv_restore_vcpu *vcpu =
+ &ctx->x86_pv.restore.vcpus[vcpuid];
+ int rc;
+ DECLARE_DOMCTL;
+ DECLARE_HYPERCALL_BUFFER(void, buffer);
+
+ buffer = xc_hypercall_buffer_alloc(xch, buffer, vcpu->xsavesz);
+ if ( !buffer )
+ {
+ ERROR("Unable to allocate %zu bytes for xsave hypercall buffer",
+ vcpu->xsavesz);
+ return -1;
+ }
+
+ domctl.cmd = XEN_DOMCTL_setvcpuextstate;
+ domctl.domain = ctx->domid;
+ domctl.u.vcpuextstate.vcpu = vcpuid;
+ domctl.u.vcpuextstate.size = vcpu->xsavesz;
+ set_xen_guest_handle(domctl.u.vcpuextstate.buffer, buffer);
+
+ memcpy(buffer, vcpu->xsave, vcpu->xsavesz);
+
+ rc = xc_domctl(xch, &domctl);
+ if ( rc )
+ PERROR("Failed to set vcpu%u's xsave info", vcpuid);
+
+ xc_hypercall_buffer_free(xch, buffer);
+
+ return rc;
+}
+
+/*
+ * Process one stashed vcpu worth of msr state and send to Xen.
+ */
+static int process_vcpu_msrs(struct xc_sr_context *ctx,
+ unsigned int vcpuid)
+{
+ xc_interface *xch = ctx->xch;
+ struct xc_sr_x86_pv_restore_vcpu *vcpu =
+ &ctx->x86_pv.restore.vcpus[vcpuid];
+ int rc;
+ DECLARE_DOMCTL;
+ DECLARE_HYPERCALL_BUFFER(void, buffer);
+
+ buffer = xc_hypercall_buffer_alloc(xch, buffer, vcpu->msrsz);
+ if ( !buffer )
+ {
+ ERROR("Unable to allocate %zu bytes for msr hypercall buffer",
+ vcpu->msrsz);
+ return -1;
+ }
+
+ domctl.cmd = XEN_DOMCTL_set_vcpu_msrs;
+ domctl.domain = ctx->domid;
+ domctl.u.vcpu_msrs.vcpu = vcpuid;
+ domctl.u.vcpu_msrs.msr_count = vcpu->msrsz % sizeof(xen_domctl_vcpu_msr_t);
+ set_xen_guest_handle(domctl.u.vcpuextstate.buffer, buffer);
+
+ memcpy(buffer, vcpu->msr, vcpu->msrsz);
+
+ rc = xc_domctl(xch, &domctl);
+ if ( rc )
+ PERROR("Failed to set vcpu%u's msrs", vcpuid);
+
+ xc_hypercall_buffer_free(xch, buffer);
+
+ return rc;
+}
+
+/*
+ * Process all stashed vcpu context and send to Xen.
+ */
+static int update_vcpu_context(struct xc_sr_context *ctx)
+{
+ xc_interface *xch = ctx->xch;
+ struct xc_sr_x86_pv_restore_vcpu *vcpu;
+ unsigned i;
+ int rc = 0;
+
+ for ( i = 0; i < ctx->x86_pv.restore.nr_vcpus; ++i )
+ {
+ vcpu = &ctx->x86_pv.restore.vcpus[i];
+
+ if ( vcpu->basic )
+ {
+ rc = process_vcpu_basic(ctx, i);
+ if ( rc )
+ return rc;
+ }
+ else if ( i == 0 )
+ {
+ ERROR("Sender didn't send vcpu0's basic state");
+ return -1;
+ }
+
+ if ( vcpu->extd )
+ {
+ rc = process_vcpu_extended(ctx, i);
+ if ( rc )
+ return rc;
+ }
+
+ if ( vcpu->xsave )
+ {
+ rc = process_vcpu_xsave(ctx, i);
+ if ( rc )
+ return rc;
+ }
+
+ if ( vcpu->msr )
+ {
+ rc = process_vcpu_msrs(ctx, i);
+ if ( rc )
+ return rc;
+ }
+ }
+
+ return rc;
+}
+
+/*
+ * Copy the p2m which has been constructed locally as memory has been
+ * allocated, over the p2m in guest, so the guest can find its memory again on
+ * resume.
+ */
+static int update_guest_p2m(struct xc_sr_context *ctx)
+{
+ xc_interface *xch = ctx->xch;
+ xen_pfn_t mfn, pfn, *guest_p2m = NULL;
+ unsigned i;
+ int rc = -1;
+
+ for ( i = 0; i < ctx->x86_pv.p2m_frames; ++i )
+ {
+ pfn = ctx->x86_pv.p2m_pfns[i];
+
+ if ( pfn > ctx->x86_pv.max_pfn )
+ {
+ ERROR("pfn (%#lx) for p2m_frame_list[%u] out of range",
+ pfn, i);
+ goto err;
+ }
+ else if ( (ctx->x86_pv.restore.pfn_types[pfn] !=
+ XEN_DOMCTL_PFINFO_NOTAB) )
+ {
+ ERROR("pfn (%#lx) for p2m_frame_list[%u] has bad type %u", pfn, i,
+ (ctx->x86_pv.restore.pfn_types[pfn] >>
+ XEN_DOMCTL_PFINFO_LTAB_SHIFT));
+ goto err;
+ }
+
+ mfn = pfn_to_mfn(ctx, pfn);
+ if ( !mfn_in_pseudophysmap(ctx, mfn) )
+ {
+ ERROR("p2m_frame_list[%u] has bad mfn", i);
+ dump_bad_pseudophysmap_entry(ctx, mfn);
+ goto err;
+ }
+
+ ctx->x86_pv.p2m_pfns[i] = mfn;
+ }
+
+ guest_p2m = xc_map_foreign_pages(xch, ctx->domid, PROT_WRITE,
+ ctx->x86_pv.p2m_pfns,
+ ctx->x86_pv.p2m_frames );
+ if ( !guest_p2m )
+ {
+ PERROR("Failed to map p2m frames");
+ goto err;
+ }
+
+ memcpy(guest_p2m, ctx->x86_pv.p2m,
+ (ctx->x86_pv.max_pfn + 1) * ctx->x86_pv.width);
+ rc = 0;
+ err:
+ if ( guest_p2m )
+ munmap(guest_p2m, ctx->x86_pv.p2m_frames * PAGE_SIZE);
+
+ return rc;
+}
+
+/*
+ * Process an X86_PV_INFO record.
+ */
+static int handle_x86_pv_info(struct xc_sr_context *ctx,
+ struct xc_sr_record *rec)
+{
+ xc_interface *xch = ctx->xch;
+ struct xc_sr_rec_x86_pv_info *info = rec->data;
+
+ if ( ctx->x86_pv.restore.seen_pv_info )
+ {
+ ERROR("Already received X86_PV_INFO record");
+ return -1;
+ }
+
+ if ( rec->length < sizeof(*info) )
+ {
+ ERROR("X86_PV_INFO record truncated: length %u, expected %zu",
+ rec->length, sizeof(*info));
+ return -1;
+ }
+ else if ( info->guest_width != 4 &&
+ info->guest_width != 8 )
+ {
+ ERROR("Unexpected guest width %u, Expected 4 or 8",
+ info->guest_width);
+ return -1;
+ }
+ else if ( info->guest_width != ctx->x86_pv.width )
+ {
+ int rc;
+ struct xen_domctl domctl;
+
+ /* Try to set address size, domain is always created 64 bit. */
+ memset(&domctl, 0, sizeof(domctl));
+ domctl.domain = ctx->domid;
+ domctl.cmd = XEN_DOMCTL_set_address_size;
+ domctl.u.address_size.size = info->guest_width * 8;
+ rc = do_domctl(xch, &domctl);
+ if ( rc != 0 )
+ {
+ ERROR("Width of guest in stream (%u"
+ " bits) differs with existing domain (%u bits)",
+ info->guest_width * 8, ctx->x86_pv.width * 8);
+ return -1;
+ }
+
+ /* Domain's information changed, better to refresh. */
+ rc = x86_pv_domain_info(ctx);
+ if ( rc != 0 )
+ {
+ ERROR("Unable to refresh guest information");
+ return -1;
+ }
+ }
+ else if ( info->pt_levels != 3 &&
+ info->pt_levels != 4 )
+ {
+ ERROR("Unexpected guest levels %u, Expected 3 or 4",
+ info->pt_levels);
+ return -1;
+ }
+ else if ( info->pt_levels != ctx->x86_pv.levels )
+ {
+ ERROR("Levels of guest in stream (%u"
+ ") differs with existing domain (%u)",
+ info->pt_levels, ctx->x86_pv.levels);
+ return -1;
+ }
+
+ ctx->x86_pv.restore.seen_pv_info = true;
+ return 0;
+}
+
+/*
+ * Process an X86_PV_P2M_FRAMES record. Takes care of expanding the local p2m
+ * state if needed.
+ */
+static int handle_x86_pv_p2m_frames(struct xc_sr_context *ctx,
+ struct xc_sr_record *rec)
+{
+ xc_interface *xch = ctx->xch;
+ struct xc_sr_rec_x86_pv_p2m_frames *data = rec->data;
+ unsigned start, end, x, fpp = PAGE_SIZE / ctx->x86_pv.width;
+ int rc;
+
+ if ( !ctx->x86_pv.restore.seen_pv_info )
+ {
+ ERROR("Not yet received X86_PV_INFO record");
+ return -1;
+ }
+
+ if ( rec->length < sizeof(*data) )
+ {
+ ERROR("X86_PV_P2M_FRAMES record truncated: length %u, min %zu",
+ rec->length, sizeof(*data) + sizeof(uint64_t));
+ return -1;
+ }
+ else if ( data->start_pfn > data->end_pfn )
+ {
+ ERROR("End pfn in stream (%#x) exceeds Start (%#x)",
+ data->end_pfn, data->start_pfn);
+ return -1;
+ }
+
+ start = data->start_pfn / fpp;
+ end = data->end_pfn / fpp + 1;
+
+ if ( rec->length != sizeof(*data) + ((end - start) * sizeof(uint64_t)) )
+ {
+ ERROR("X86_PV_P2M_FRAMES record wrong size: start_pfn %#x"
+ ", end_pfn %#x, length %u, expected %zu + (%u - %u) * %zu",
+ data->start_pfn, data->end_pfn, rec->length,
+ sizeof(*data), end, start, sizeof(uint64_t));
+ return -1;
+ }
+
+ if ( data->end_pfn > ctx->x86_pv.max_pfn )
+ {
+ rc = expand_p2m(ctx, data->end_pfn);
+ if ( rc )
+ return rc;
+ }
+
+ for ( x = 0; x < (end - start); ++x )
+ ctx->x86_pv.p2m_pfns[start + x] = data->p2m_pfns[x];
+
+ return 0;
+}
+
+/*
+ * Processes X86_PV_VCPU_{BASIC,EXTENDED,XSAVE,MSRS} records from the stream.
+ * The blobs are all stashed to one side as they need to be deferred until the
+ * very end of the stream, rather than being send to Xen at the point they
+ * arrive in the stream. It performs all pre-hypercall size validation.
+ */
+static int handle_x86_pv_vcpu_blob(struct xc_sr_context *ctx,
+ struct xc_sr_record *rec)
+{
+ xc_interface *xch = ctx->xch;
+ struct xc_sr_rec_x86_pv_vcpu_hdr *vhdr = rec->data;
+ struct xc_sr_x86_pv_restore_vcpu *vcpu;
+ const char *rec_name;
+ size_t blobsz;
+ void *blob;
+ int rc = -1;
+
+ switch ( rec->type )
+ {
+ case REC_TYPE_X86_PV_VCPU_BASIC:
+ rec_name = "X86_PV_VCPU_BASIC";
+ break;
+
+ case REC_TYPE_X86_PV_VCPU_EXTENDED:
+ rec_name = "X86_PV_VCPU_EXTENDED";
+ break;
+
+ case REC_TYPE_X86_PV_VCPU_XSAVE:
+ rec_name = "X86_PV_VCPU_XSAVE";
+ break;
+
+ case REC_TYPE_X86_PV_VCPU_MSRS:
+ rec_name = "X86_PV_VCPU_MSRS";
+ break;
+
+ default:
+ ERROR("Unrecognised vcpu blob record %s (%u)",
+ rec_type_to_str(rec->type), rec->type);
+ goto out;
+ }
+
+ /* Confirm that there is a complete header. */
+ if ( rec->length <= sizeof(*vhdr) )
+ {
+ ERROR("%s record truncated: length %u, min %zu",
+ rec_name, rec->length, sizeof(*vhdr) + 1);
+ goto out;
+ }
+
+ blobsz = rec->length - sizeof(*vhdr);
+
+ /* Check that the vcpu id is within range. */
+ if ( vhdr->vcpu_id >= ctx->x86_pv.restore.nr_vcpus )
+ {
+ ERROR("%s record vcpu_id (%u) exceeds domain max (%u)",
+ rec_name, vhdr->vcpu_id, ctx->x86_pv.restore.nr_vcpus - 1);
+ goto out;
+ }
+
+ vcpu = &ctx->x86_pv.restore.vcpus[vhdr->vcpu_id];
+
+ /* Further per-record checks, where possible. */
+ switch ( rec->type )
+ {
+ case REC_TYPE_X86_PV_VCPU_BASIC:
+ {
+ size_t vcpusz = ctx->x86_pv.width == 8 ?
+ sizeof(vcpu_guest_context_x86_64_t) :
+ sizeof(vcpu_guest_context_x86_32_t);
+
+ if ( blobsz != vcpusz )
+ {
+ ERROR("%s record wrong size: expected %zu, got %u",
+ rec_name, sizeof(*vhdr) + vcpusz, rec->length);
+ goto out;
+ }
+ break;
+ }
+
+ case REC_TYPE_X86_PV_VCPU_EXTENDED:
+ if ( blobsz > 128 )
+ {
+ ERROR("%s record too long: max %zu, got %u",
+ rec_name, sizeof(*vhdr) + 128, rec->length);
+ goto out;
+ }
+ break;
+
+ case REC_TYPE_X86_PV_VCPU_XSAVE:
+ if ( blobsz % sizeof(xen_domctl_vcpu_msr_t) != 0 )
+ {
+ ERROR("%s record payload size %zu expected to be a multiple of
%zu",
+ rec_name, blobsz, sizeof(xen_domctl_vcpu_msr_t));
+ goto out;
+ }
+ break;
+ }
+
+ /* Allocate memory. */
+ blob = malloc(blobsz);
+ if ( !blob )
+ {
+ ERROR("Unable to allocate %zu bytes for vcpu%u %s blob",
+ blobsz, vhdr->vcpu_id, rec_name);
+ goto out;
+ }
+
+ memcpy(blob, &vhdr->context, blobsz);
+
+ /* Stash sideways for later. */
+ switch ( rec->type )
+ {
+#define RECSTORE(x, y) case REC_TYPE_X86_PV_ ## x: \
+ free(y); (y) = blob; (y ## sz) = blobsz; break
+
+ RECSTORE(VCPU_BASIC, vcpu->basic);
+ RECSTORE(VCPU_EXTENDED, vcpu->extd);
+ RECSTORE(VCPU_XSAVE, vcpu->xsave);
+ RECSTORE(VCPU_MSRS, vcpu->msr);
+#undef RECSTORE
+ }
+
+ rc = 0;
+
+ out:
+ return rc;
+}
+
+/*
+ * Process a SHARED_INFO record from the stream.
+ */
+static int handle_shared_info(struct xc_sr_context *ctx,
+ struct xc_sr_record *rec)
+{
+ xc_interface *xch = ctx->xch;
+ unsigned i;
+ int rc = -1;
+ shared_info_any_t *guest_shinfo = NULL;
+ const shared_info_any_t *old_shinfo = rec->data;
+
+ if ( !ctx->x86_pv.restore.seen_pv_info )
+ {
+ ERROR("Not yet received X86_PV_INFO record");
+ return -1;
+ }
+
+ if ( rec->length != PAGE_SIZE )
+ {
+ ERROR("X86_PV_SHARED_INFO record wrong size: length %u"
+ ", expected 4096", rec->length);
+ goto err;
+ }
+
+ guest_shinfo = xc_map_foreign_range(
+ xch, ctx->domid, PAGE_SIZE, PROT_READ | PROT_WRITE,
+ ctx->dominfo.shared_info_frame);
+ if ( !guest_shinfo )
+ {
+ PERROR("Failed to map Shared Info at mfn %#lx",
+ ctx->dominfo.shared_info_frame);
+ goto err;
+ }
+
+ MEMCPY_FIELD(guest_shinfo, old_shinfo, vcpu_info, ctx->x86_pv.width);
+ MEMCPY_FIELD(guest_shinfo, old_shinfo, arch, ctx->x86_pv.width);
+
+ SET_FIELD(guest_shinfo, arch.pfn_to_mfn_frame_list_list,
+ 0, ctx->x86_pv.width);
+
+ MEMSET_ARRAY_FIELD(guest_shinfo, evtchn_pending, 0, ctx->x86_pv.width);
+ for ( i = 0; i < XEN_LEGACY_MAX_VCPUS; i++ )
+ SET_FIELD(guest_shinfo, vcpu_info[i].evtchn_pending_sel,
+ 0, ctx->x86_pv.width);
+
+ MEMSET_ARRAY_FIELD(guest_shinfo, evtchn_mask, 0xff, ctx->x86_pv.width);
+
+ rc = 0;
+ err:
+
+ if ( guest_shinfo )
+ munmap(guest_shinfo, PAGE_SIZE);
+
+ return rc;
+}
+
+/* restore_ops function. */
+static bool x86_pv_pfn_is_valid(const struct xc_sr_context *ctx, xen_pfn_t pfn)
+{
+ return pfn <= ctx->x86_pv.max_pfn;
+}
+
+/* restore_ops function. */
+static void x86_pv_set_page_type(struct xc_sr_context *ctx, xen_pfn_t pfn,
+ unsigned long type)
+{
+ assert(pfn <= ctx->x86_pv.max_pfn);
+
+ ctx->x86_pv.restore.pfn_types[pfn] = type;
+}
+
+/* restore_ops function. */
+static void x86_pv_set_gfn(struct xc_sr_context *ctx, xen_pfn_t pfn,
+ xen_pfn_t mfn)
+{
+ assert(pfn <= ctx->x86_pv.max_pfn);
+
+ if ( ctx->x86_pv.width == sizeof(uint64_t) )
+ /* 64 bit guest. Need to expand INVALID_MFN for 32 bit toolstacks. */
+ ((uint64_t *)ctx->x86_pv.p2m)[pfn] = mfn == INVALID_MFN ? ~0ULL : mfn;
+ else
+ /* 32 bit guest. Can truncate INVALID_MFN for 64 bit toolstacks. */
+ ((uint32_t *)ctx->x86_pv.p2m)[pfn] = mfn;
+}
+
+/*
+ * restore_ops function. Convert pfns back to mfns in pagetables. Possibly
+ * needs to populate new frames if a PTE is found referring to a frame which
+ * hasn't yet been seen from PAGE_DATA records.
+ */
+static int x86_pv_localise_page(struct xc_sr_context *ctx,
+ uint32_t type, void *page)
+{
+ xc_interface *xch = ctx->xch;
+ uint64_t *table = page;
+ uint64_t pte;
+ unsigned i, to_populate;
+ xen_pfn_t pfns[(PAGE_SIZE / sizeof(uint64_t))];
+
+ type &= XEN_DOMCTL_PFINFO_LTABTYPE_MASK;
+
+ /* Only page tables need localisation. */
+ if ( type < XEN_DOMCTL_PFINFO_L1TAB || type > XEN_DOMCTL_PFINFO_L4TAB )
+ return 0;
+
+ /* Check to see whether we need to populate any new frames. */
+ for ( i = 0, to_populate = 0; i < (PAGE_SIZE / sizeof(uint64_t)); ++i )
+ {
+ pte = table[i];
+
+ if ( pte & _PAGE_PRESENT )
+ {
+ xen_pfn_t pfn = pte_to_frame(pte);
+
+#ifdef __i386__
+ if ( pfn == INVALID_MFN )
+ {
+ ERROR("PTE truncation detected. L%u[%u] = %016"PRIx64,
+ type >> XEN_DOMCTL_PFINFO_LTAB_SHIFT, i, pte);
+ errno = E2BIG;
+ return -1;
+ }
+#endif
+
+ if ( pfn_to_mfn(ctx, pfn) == INVALID_MFN )
+ pfns[to_populate++] = pfn;
+ }
+ }
+
+ if ( to_populate && populate_pfns(ctx, to_populate, pfns, NULL) )
+ return -1;
+
+ for ( i = 0; i < (PAGE_SIZE / sizeof(uint64_t)); ++i )
+ {
+ pte = table[i];
+
+ if ( pte & _PAGE_PRESENT )
+ {
+ xen_pfn_t mfn, pfn;
+
+ pfn = pte_to_frame(pte);
+ mfn = pfn_to_mfn(ctx, pfn);
+
+ if ( !mfn_in_pseudophysmap(ctx, mfn) )
+ {
+ ERROR("Bad mfn for L%u[%u] - pte %"PRIx64,
+ type >> XEN_DOMCTL_PFINFO_LTAB_SHIFT, i, pte);
+ dump_bad_pseudophysmap_entry(ctx, mfn);
+ errno = ERANGE;
+ return -1;
+ }
+
+ table[i] = merge_pte(pte, mfn);
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * restore_ops function. Confirm that the incoming stream matches the type of
+ * domain we are attempting to restore into.
+ */
+static int x86_pv_setup(struct xc_sr_context *ctx)
+{
+ xc_interface *xch = ctx->xch;
+ int rc;
+
+ if ( ctx->restore.guest_type != DHDR_TYPE_X86_PV )
+ {
+ ERROR("Unable to restore %s domain into an x86_pv domain",
+ dhdr_type_to_str(ctx->restore.guest_type));
+ return -1;
+ }
+ else if ( ctx->restore.guest_page_size != PAGE_SIZE )
+ {
+ ERROR("Invalid page size %d for x86_pv domains",
+ ctx->restore.guest_page_size);
+ return -1;
+ }
+
+ rc = x86_pv_domain_info(ctx);
+ if ( rc )
+ return rc;
+
+ ctx->x86_pv.restore.nr_vcpus = ctx->dominfo.max_vcpu_id + 1;
+ ctx->x86_pv.restore.vcpus = calloc(sizeof(struct
xc_sr_x86_pv_restore_vcpu),
+ ctx->x86_pv.restore.nr_vcpus);
+ if ( !ctx->x86_pv.restore.vcpus )
+ {
+ errno = ENOMEM;
+ return -1;
+ }
+
+ rc = x86_pv_map_m2p(ctx);
+ if ( rc )
+ return rc;
+
+ return rc;
+}
+
+/*
+ * restore_ops function.
+ */
+static int x86_pv_process_record(struct xc_sr_context *ctx,
+ struct xc_sr_record *rec)
+{
+ switch ( rec->type )
+ {
+ case REC_TYPE_X86_PV_INFO:
+ return handle_x86_pv_info(ctx, rec);
+
+ case REC_TYPE_X86_PV_P2M_FRAMES:
+ return handle_x86_pv_p2m_frames(ctx, rec);
+
+ case REC_TYPE_X86_PV_VCPU_BASIC:
+ case REC_TYPE_X86_PV_VCPU_EXTENDED:
+ case REC_TYPE_X86_PV_VCPU_XSAVE:
+ case REC_TYPE_X86_PV_VCPU_MSRS:
+ return handle_x86_pv_vcpu_blob(ctx, rec);
+
+ case REC_TYPE_SHARED_INFO:
+ return handle_shared_info(ctx, rec);
+
+ case REC_TYPE_TSC_INFO:
+ return handle_tsc_info(ctx, rec);
+
+ default:
+ return RECORD_NOT_PROCESSED;
+ }
+}
+
+/*
+ * restore_ops function. Update the vcpu context in Xen, pin the pagetables,
+ * rewrite the p2m and seed the grant table.
+ */
+static int x86_pv_stream_complete(struct xc_sr_context *ctx)
+{
+ xc_interface *xch = ctx->xch;
+ int rc;
+
+ rc = update_vcpu_context(ctx);
+ if ( rc )
+ return rc;
+
+ rc = pin_pagetables(ctx);
+ if ( rc )
+ return rc;
+
+ rc = update_guest_p2m(ctx);
+ if ( rc )
+ return rc;
+
+ rc = xc_dom_gnttab_seed(xch, ctx->domid,
+ ctx->restore.console_gfn,
+ ctx->restore.xenstore_gfn,
+ ctx->restore.console_domid,
+ ctx->restore.xenstore_domid);
+ if ( rc )
+ {
+ PERROR("Failed to seed grant table");
+ return rc;
+ }
+
+ return rc;
+}
+
+/*
+ * restore_ops function.
+ */
+static int x86_pv_cleanup(struct xc_sr_context *ctx)
+{
+ free(ctx->x86_pv.p2m);
+ free(ctx->x86_pv.p2m_pfns);
+
+ if ( ctx->x86_pv.restore.vcpus )
+ {
+ unsigned i;
+
+ for ( i = 0; i < ctx->x86_pv.restore.nr_vcpus; ++i )
+ {
+ struct xc_sr_x86_pv_restore_vcpu *vcpu =
+ &ctx->x86_pv.restore.vcpus[i];
+
+ free(vcpu->basic);
+ free(vcpu->extd);
+ free(vcpu->xsave);
+ free(vcpu->msr);
+ }
+
+ free(ctx->x86_pv.restore.vcpus);
+ }
+
+ free(ctx->x86_pv.restore.pfn_types);
+
+ if ( ctx->x86_pv.m2p )
+ munmap(ctx->x86_pv.m2p, ctx->x86_pv.nr_m2p_frames * PAGE_SIZE);
+
+ return 0;
+}
+
+struct xc_sr_restore_ops restore_ops_x86_pv =
+{
+ .pfn_is_valid = x86_pv_pfn_is_valid,
+ .pfn_to_gfn = pfn_to_mfn,
+ .set_page_type = x86_pv_set_page_type,
+ .set_gfn = x86_pv_set_gfn,
+ .localise_page = x86_pv_localise_page,
+ .setup = x86_pv_setup,
+ .process_record = x86_pv_process_record,
+ .stream_complete = x86_pv_stream_complete,
+ .cleanup = x86_pv_cleanup,
+};
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
--
1.7.10.4
_______________________________________________
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