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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] Some save/restore cleanups.
# HG changeset patch
# User Steven Hand <steven@xxxxxxxxxxxxx>
# Date 1175528812 -3600
# Node ID d05a3220ea050b13ac02ef109c6d01cf378199cc
# Parent 9695cc13c48ce29fd25f188eecf331029c381fc4
Some save/restore cleanups.
Signed-off-by: Steven Hand <steven@xxxxxxxxxxxxx>
---
tools/libxc/xc_core.c | 4 -
tools/libxc/xc_core_x86.c | 12 ++--
tools/libxc/xc_hvm_restore.c | 14 ++++-
tools/libxc/xc_hvm_save.c | 7 +-
tools/libxc/xc_linux_restore.c | 85 ++++++++++++++++++--------------
tools/libxc/xc_linux_save.c | 66 ++++++++++++------------
tools/libxc/xc_resume.c | 4 -
tools/libxc/xenguest.h | 9 +--
tools/libxc/xg_private.h | 9 +--
tools/python/xen/xend/XendCheckpoint.py | 13 ++--
tools/xcutils/xc_restore.c | 33 ++++++------
11 files changed, 138 insertions(+), 118 deletions(-)
diff -r 9695cc13c48c -r d05a3220ea05 tools/libxc/xc_core.c
--- a/tools/libxc/xc_core.c Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/libxc/xc_core.c Mon Apr 02 16:46:52 2007 +0100
@@ -312,7 +312,7 @@ xc_domain_dumpcore_via_callback(int xc_h
int auto_translated_physmap;
xen_pfn_t *p2m = NULL;
- unsigned long max_pfn = 0;
+ unsigned long p2m_size = 0;
struct xen_dumpcore_p2m *p2m_array = NULL;
uint64_t *pfn_array = NULL;
@@ -396,7 +396,7 @@ xc_domain_dumpcore_via_callback(int xc_h
}
sts = xc_core_arch_map_p2m(xc_handle, &info, live_shinfo,
- &p2m, &max_pfn);
+ &p2m, &p2m_size);
if ( sts != 0 )
goto out;
}
diff -r 9695cc13c48c -r d05a3220ea05 tools/libxc/xc_core_x86.c
--- a/tools/libxc/xc_core_x86.c Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/libxc/xc_core_x86.c Mon Apr 02 16:46:52 2007 +0100
@@ -38,7 +38,7 @@ xc_core_arch_memory_map_get(int xc_handl
xc_core_memory_map_t **mapp,
unsigned int *nr_entries)
{
- unsigned long max_pfn = max_gpfn(xc_handle, info->domid);
+ unsigned long p2m_size = max_gpfn(xc_handle, info->domid);
xc_core_memory_map_t *map;
map = malloc(sizeof(*map));
@@ -49,7 +49,7 @@ xc_core_arch_memory_map_get(int xc_handl
}
map->addr = 0;
- map->size = max_pfn << PAGE_SHIFT;
+ map->size = p2m_size << PAGE_SHIFT;
*mapp = map;
*nr_entries = 1;
@@ -65,13 +65,13 @@ xc_core_arch_map_p2m(int xc_handle, xc_d
xen_pfn_t *live_p2m_frame_list_list = NULL;
xen_pfn_t *live_p2m_frame_list = NULL;
uint32_t dom = info->domid;
- unsigned long max_pfn = max_gpfn(xc_handle, info->domid);
+ unsigned long p2m_size = max_gpfn(xc_handle, info->domid);
int ret = -1;
int err;
- if ( max_pfn < info->nr_pages )
+ if ( p2m_size < info->nr_pages )
{
- ERROR("max_pfn < nr_pages -1 (%lx < %lx", max_pfn, info->nr_pages - 1);
+ ERROR("p2m_size < nr_pages -1 (%lx < %lx", p2m_size, info->nr_pages -
1);
goto out;
}
@@ -106,7 +106,7 @@ xc_core_arch_map_p2m(int xc_handle, xc_d
goto out;
}
- *pfnp = max_pfn;
+ *pfnp = p2m_size;
ret = 0;
diff -r 9695cc13c48c -r d05a3220ea05 tools/libxc/xc_hvm_restore.c
--- a/tools/libxc/xc_hvm_restore.c Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/libxc/xc_hvm_restore.c Mon Apr 02 16:46:52 2007 +0100
@@ -95,7 +95,7 @@ int xc_hvm_restore(int xc_handle, int io
unsigned long pfn_array_size = max_pfn + 1;
/* Number of pages of memory the guest has. *Not* the same as max_pfn. */
- unsigned long nr_pages = max_pfn + 1;
+ unsigned long nr_pages = max_pfn;
/* MMIO hole doesn't contain RAM */
if ( nr_pages >= HVM_BELOW_4G_MMIO_START >> PAGE_SHIFT )
nr_pages -= HVM_BELOW_4G_MMIO_LENGTH >> PAGE_SHIFT;
@@ -270,7 +270,6 @@ int xc_hvm_restore(int xc_handle, int io
}/*while 1*/
-/* xc_set_hvm_param(xc_handle, dom, HVM_PARAM_APIC_ENABLED, apic);*/
xc_set_hvm_param(xc_handle, dom, HVM_PARAM_PAE_ENABLED, pae);
xc_set_hvm_param(xc_handle, dom, HVM_PARAM_STORE_EVTCHN, store_evtchn);
@@ -279,13 +278,22 @@ int xc_hvm_restore(int xc_handle, int io
else
shared_page_nr = (v_end >> PAGE_SHIFT) - 1;
+ /* Ensure we clear these pages */
+ if ( xc_clear_domain_page(xc_handle, dom, shared_page_nr) ||
+ xc_clear_domain_page(xc_handle, dom, shared_page_nr-1) ||
+ xc_clear_domain_page(xc_handle, dom, shared_page_nr-2) ) {
+ rc = -1;
+ goto out;
+ }
+
xc_set_hvm_param(xc_handle, dom, HVM_PARAM_STORE_PFN, shared_page_nr-1);
xc_set_hvm_param(xc_handle, dom, HVM_PARAM_BUFIOREQ_PFN, shared_page_nr-2);
xc_set_hvm_param(xc_handle, dom, HVM_PARAM_IOREQ_PFN, shared_page_nr);
/* caculate the store_mfn , wrong val cause hang when introduceDomain */
*store_mfn = (v_end >> PAGE_SHIFT) - 2;
- DPRINTF("hvm restore:calculate new store_mfn=0x%lx,v_end=0x%llx..\n",
*store_mfn, v_end);
+ DPRINTF("hvm restore: calculate new store_mfn=0x%lx, v_end=0x%llx.\n",
+ *store_mfn, v_end);
if (!read_exact(io_fd, &nr_vcpus, sizeof(uint32_t))) {
ERROR("error read nr vcpu !\n");
diff -r 9695cc13c48c -r d05a3220ea05 tools/libxc/xc_hvm_save.c
--- a/tools/libxc/xc_hvm_save.c Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/libxc/xc_hvm_save.c Mon Apr 02 16:46:52 2007 +0100
@@ -332,10 +332,10 @@ int xc_hvm_save(int xc_handle, int io_fd
unsigned long total_sent = 0;
- 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,
+ 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 */
if(!max_iters)
max_iters = DEF_MAX_ITERS;
@@ -382,7 +382,6 @@ int xc_hvm_save(int xc_handle, int io_fd
ERROR("HVM: Could not read magic PFN parameters");
goto out;
}
-
DPRINTF("saved hvm domain info:max_memkb=0x%lx, max_mfn=0x%lx, "
"nr_pages=0x%lx\n", info.max_memkb, max_mfn, info.nr_pages);
diff -r 9695cc13c48c -r d05a3220ea05 tools/libxc/xc_linux_restore.c
--- a/tools/libxc/xc_linux_restore.c Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/libxc/xc_linux_restore.c Mon Apr 02 16:46:52 2007 +0100
@@ -22,8 +22,14 @@ static unsigned long hvirt_start;
/* #levels of page tables used by the current guest */
static unsigned int pt_levels;
-/* total number of pages used by the current guest */
-static unsigned long max_pfn;
+/* number of pfns this guest has (i.e. number of entries in the P2M) */
+static unsigned long p2m_size;
+
+/* number of 'in use' pfns in the guest (i.e. #P2M entries with a valid mfn) */
+static unsigned long nr_pfns;
+
+/* largest possible value of nr_pfns (i.e. domain's maximum memory size) */
+static unsigned long max_nr_pfns;
/* Live mapping of the table mapping each PFN to its current MFN. */
static xen_pfn_t *live_p2m = NULL;
@@ -33,7 +39,6 @@ static xen_pfn_t *p2m = NULL;
/* A table of P2M mappings in the current region */
static xen_pfn_t *p2m_batch = NULL;
-
static ssize_t
read_exact(int fd, void *buf, size_t count)
@@ -85,11 +90,11 @@ static int uncanonicalize_pagetable(int
pfn = (pte >> PAGE_SHIFT) & MFN_MASK_X86;
- if(pfn >= max_pfn) {
+ if(pfn >= p2m_size) {
/* This "page table page" is probably not one; bail. */
ERROR("Frame number in type %lu page table is out of range: "
- "i=%d pfn=0x%lx max_pfn=%lu",
- type >> 28, i, pfn, max_pfn);
+ "i=%d pfn=0x%lx p2m_size=%lu",
+ type >> 28, i, pfn, p2m_size);
return 0;
}
@@ -138,8 +143,9 @@ static int uncanonicalize_pagetable(int
return 1;
}
-int xc_linux_restore(int xc_handle, int io_fd,
- uint32_t dom, unsigned long nr_pfns,
+
+int xc_linux_restore(int xc_handle, int io_fd, uint32_t dom,
+ unsigned long p2msize, unsigned long maxnrpfns,
unsigned int store_evtchn, unsigned long *store_mfn,
unsigned int console_evtchn, unsigned long *console_mfn)
{
@@ -191,9 +197,13 @@ int xc_linux_restore(int xc_handle, int
unsigned int max_vcpu_id = 0;
int new_ctxt_format = 0;
- max_pfn = nr_pfns;
-
- DPRINTF("xc_linux_restore start: max_pfn = %lx\n", max_pfn);
+ p2m_size = p2msize;
+ max_nr_pfns = maxnrpfns;
+
+ /* For info only */
+ nr_pfns = 0;
+
+ DPRINTF("xc_linux_restore start: p2m_size = %lx\n", p2m_size);
/*
* XXX For now, 32bit dom0's can only save/restore 32bit domUs
@@ -294,8 +304,8 @@ int xc_linux_restore(int xc_handle, int
}
/* We want zeroed memory so use calloc rather than malloc. */
- p2m = calloc(max_pfn, sizeof(xen_pfn_t));
- pfn_type = calloc(max_pfn, sizeof(unsigned long));
+ p2m = calloc(p2m_size, sizeof(xen_pfn_t));
+ pfn_type = calloc(p2m_size, sizeof(unsigned long));
region_mfn = calloc(MAX_BATCH_SIZE, sizeof(xen_pfn_t));
p2m_batch = calloc(MAX_BATCH_SIZE, sizeof(xen_pfn_t));
@@ -325,13 +335,13 @@ int xc_linux_restore(int xc_handle, int
}
shared_info_frame = domctl.u.getdomaininfo.shared_info_frame;
- if (xc_domain_setmaxmem(xc_handle, dom, PFN_TO_KB(max_pfn)) != 0) {
+ if (xc_domain_setmaxmem(xc_handle, dom, PFN_TO_KB(max_nr_pfns)) != 0) {
errno = ENOMEM;
goto out;
}
/* Mark all PFNs as invalid; we allocate on demand */
- for ( pfn = 0; pfn < max_pfn; pfn++ )
+ for ( pfn = 0; pfn < p2m_size; pfn++ )
p2m[pfn] = INVALID_P2M_ENTRY;
if(!(mmu = xc_init_mmu_updates(xc_handle, dom))) {
@@ -352,7 +362,7 @@ int xc_linux_restore(int xc_handle, int
int j, nr_mfns = 0;
- this_pc = (n * 100) / max_pfn;
+ this_pc = (n * 100) / p2m_size;
if ( (this_pc - prev_pc) >= 5 )
{
PPRINTF("\b\b\b\b%3d%%", this_pc);
@@ -436,6 +446,7 @@ int xc_linux_restore(int xc_handle, int
if (p2m[pfn] == INVALID_P2M_ENTRY) {
/* We just allocated a new mfn above; update p2m */
p2m[pfn] = p2m_batch[nr_mfns++];
+ nr_pfns++;
}
/* setup region_mfn[] for batch map */
@@ -465,7 +476,7 @@ int xc_linux_restore(int xc_handle, int
/* a bogus/unmapped page: skip it */
continue;
- if ( pfn > max_pfn )
+ if ( pfn > p2m_size )
{
ERROR("pfn out of range");
goto out;
@@ -518,7 +529,7 @@ int xc_linux_restore(int xc_handle, int
else if ( pagetype != XEN_DOMCTL_PFINFO_NOTAB )
{
ERROR("Bogus page type %lx page table is out of range: "
- "i=%d max_pfn=%lu", pagetype, i, max_pfn);
+ "i=%d p2m_size=%lu", pagetype, i, p2m_size);
goto out;
}
@@ -598,7 +609,7 @@ int xc_linux_restore(int xc_handle, int
int j, k;
/* First pass: find all L3TABs current in > 4G mfns and get new mfns */
- for ( i = 0; i < max_pfn; i++ )
+ for ( i = 0; i < p2m_size; i++ )
{
if ( ((pfn_type[i] & XEN_DOMCTL_PFINFO_LTABTYPE_MASK) ==
XEN_DOMCTL_PFINFO_L3TAB) &&
@@ -646,7 +657,7 @@ int xc_linux_restore(int xc_handle, int
/* Second pass: find all L1TABs and uncanonicalize them */
j = 0;
- for ( i = 0; i < max_pfn; i++ )
+ for ( i = 0; i < p2m_size; i++ )
{
if ( ((pfn_type[i] & XEN_DOMCTL_PFINFO_LTABTYPE_MASK) ==
XEN_DOMCTL_PFINFO_L1TAB) )
@@ -655,7 +666,7 @@ int xc_linux_restore(int xc_handle, int
j++;
}
- if(i == (max_pfn-1) || j == MAX_BATCH_SIZE) {
+ if(i == (p2m_size-1) || j == MAX_BATCH_SIZE) {
if (!(region_base = xc_map_foreign_batch(
xc_handle, dom, PROT_READ | PROT_WRITE,
@@ -689,7 +700,7 @@ int xc_linux_restore(int xc_handle, int
* will barf when doing the type-checking.
*/
nr_pins = 0;
- for ( i = 0; i < max_pfn; i++ )
+ for ( i = 0; i < p2m_size; i++ )
{
if ( (pfn_type[i] & XEN_DOMCTL_PFINFO_LPINTAB) == 0 )
continue;
@@ -736,7 +747,7 @@ int xc_linux_restore(int xc_handle, int
}
DPRINTF("\b\b\b\b100%%\n");
- DPRINTF("Memory reloaded.\n");
+ DPRINTF("Memory reloaded (%ld pages of max %ld)\n", nr_pfns, max_nr_pfns);
/* Get the list of PFNs that are not in the psuedo-phys map */
{
@@ -808,7 +819,7 @@ int xc_linux_restore(int xc_handle, int
* resume record.
*/
pfn = ctxt.user_regs.edx;
- if ((pfn >= max_pfn) ||
+ if ((pfn >= p2m_size) ||
(pfn_type[pfn] != XEN_DOMCTL_PFINFO_NOTAB)) {
ERROR("Suspend record frame number is bad");
goto out;
@@ -816,7 +827,7 @@ int xc_linux_restore(int xc_handle, int
ctxt.user_regs.edx = mfn = p2m[pfn];
start_info = xc_map_foreign_range(
xc_handle, dom, PAGE_SIZE, PROT_READ | PROT_WRITE, mfn);
- start_info->nr_pages = max_pfn;
+ start_info->nr_pages = p2m_size;
start_info->shared_info = shared_info_frame << PAGE_SHIFT;
start_info->flags = 0;
*store_mfn = start_info->store_mfn = p2m[start_info->store_mfn];
@@ -835,7 +846,7 @@ int xc_linux_restore(int xc_handle, int
for (j = 0; (512*j) < ctxt.gdt_ents; j++) {
pfn = ctxt.gdt_frames[j];
- if ((pfn >= max_pfn) ||
+ if ((pfn >= p2m_size) ||
(pfn_type[pfn] != XEN_DOMCTL_PFINFO_NOTAB)) {
ERROR("GDT frame number is bad");
goto out;
@@ -846,16 +857,16 @@ int xc_linux_restore(int xc_handle, int
/* Uncanonicalise the page table base pointer. */
pfn = xen_cr3_to_pfn(ctxt.ctrlreg[3]);
- if (pfn >= max_pfn) {
- ERROR("PT base is bad: pfn=%lu max_pfn=%lu type=%08lx",
- pfn, max_pfn, pfn_type[pfn]);
+ if (pfn >= p2m_size) {
+ ERROR("PT base is bad: pfn=%lu p2m_size=%lu type=%08lx",
+ pfn, p2m_size, pfn_type[pfn]);
goto out;
}
if ( (pfn_type[pfn] & XEN_DOMCTL_PFINFO_LTABTYPE_MASK) !=
((unsigned long)pt_levels<<XEN_DOMCTL_PFINFO_LTAB_SHIFT) ) {
ERROR("PT base is bad. pfn=%lu nr=%lu type=%08lx %08lx",
- pfn, max_pfn, pfn_type[pfn],
+ pfn, p2m_size, pfn_type[pfn],
(unsigned long)pt_levels<<XEN_DOMCTL_PFINFO_LTAB_SHIFT);
goto out;
}
@@ -867,16 +878,16 @@ int xc_linux_restore(int xc_handle, int
{
pfn = xen_cr3_to_pfn(ctxt.ctrlreg[1]);
- if (pfn >= max_pfn) {
- ERROR("User PT base is bad: pfn=%lu max_pfn=%lu type=%08lx",
- pfn, max_pfn, pfn_type[pfn]);
+ if (pfn >= p2m_size) {
+ ERROR("User PT base is bad: pfn=%lu p2m_size=%lu type=%08lx",
+ pfn, p2m_size, pfn_type[pfn]);
goto out;
}
if ( (pfn_type[pfn] & XEN_DOMCTL_PFINFO_LTABTYPE_MASK) !=
((unsigned long)pt_levels<<XEN_DOMCTL_PFINFO_LTAB_SHIFT) ) {
ERROR("User PT base is bad. pfn=%lu nr=%lu type=%08lx %08lx",
- pfn, max_pfn, pfn_type[pfn],
+ pfn, p2m_size, pfn_type[pfn],
(unsigned long)pt_levels<<XEN_DOMCTL_PFINFO_LTAB_SHIFT);
goto out;
}
@@ -915,7 +926,7 @@ int xc_linux_restore(int xc_handle, int
/* Uncanonicalise the pfn-to-mfn table frame-number list. */
for (i = 0; i < P2M_FL_ENTRIES; i++) {
pfn = p2m_frame_list[i];
- if ((pfn >= max_pfn) || (pfn_type[pfn] != XEN_DOMCTL_PFINFO_NOTAB)) {
+ if ((pfn >= p2m_size) || (pfn_type[pfn] != XEN_DOMCTL_PFINFO_NOTAB)) {
ERROR("PFN-to-MFN frame number is bad");
goto out;
}
@@ -930,8 +941,8 @@ int xc_linux_restore(int xc_handle, int
goto out;
}
- memcpy(live_p2m, p2m, P2M_SIZE);
- munmap(live_p2m, P2M_SIZE);
+ memcpy(live_p2m, p2m, ROUNDUP(p2m_size * sizeof(xen_pfn_t), PAGE_SHIFT));
+ munmap(live_p2m, ROUNDUP(p2m_size * sizeof(xen_pfn_t), PAGE_SHIFT));
DPRINTF("Domain ready to be built.\n");
diff -r 9695cc13c48c -r d05a3220ea05 tools/libxc/xc_linux_save.c
--- a/tools/libxc/xc_linux_save.c Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/libxc/xc_linux_save.c Mon Apr 02 16:46:52 2007 +0100
@@ -25,7 +25,7 @@
**
*/
#define DEF_MAX_ITERS 29 /* limit us to 30 times round loop */
-#define DEF_MAX_FACTOR 3 /* never send more than 3x nr_pfns */
+#define DEF_MAX_FACTOR 3 /* never send more than 3x p2m_size */
/* max mfn of the whole machine */
@@ -37,8 +37,8 @@ static unsigned long hvirt_start;
/* #levels of page tables used by the current guest */
static unsigned int pt_levels;
-/* total number of pages used by the current guest */
-static unsigned long max_pfn;
+/* number of pfns this guest has (i.e. number of entries in the P2M) */
+static unsigned long p2m_size;
/* Live mapping of the table mapping each PFN to its current MFN. */
static xen_pfn_t *live_p2m = NULL;
@@ -57,7 +57,7 @@ static unsigned long m2p_mfn0;
*/
#define MFN_IS_IN_PSEUDOPHYS_MAP(_mfn) \
(((_mfn) < (max_mfn)) && \
- ((mfn_to_pfn(_mfn) < (max_pfn)) && \
+ ((mfn_to_pfn(_mfn) < (p2m_size)) && \
(live_p2m[mfn_to_pfn(_mfn)] == (_mfn))))
@@ -79,7 +79,7 @@ static unsigned long m2p_mfn0;
*/
#define BITS_PER_LONG (sizeof(unsigned long) * 8)
-#define BITMAP_SIZE ((max_pfn + BITS_PER_LONG - 1) / 8)
+#define BITMAP_SIZE ((p2m_size + BITS_PER_LONG - 1) / 8)
#define BITMAP_ENTRY(_nr,_bmap) \
((volatile unsigned long *)(_bmap))[(_nr)/BITS_PER_LONG]
@@ -343,7 +343,7 @@ static int print_stats(int xc_handle, ui
}
-static int analysis_phase(int xc_handle, uint32_t domid, int max_pfn,
+static int analysis_phase(int xc_handle, uint32_t domid, int p2m_size,
unsigned long *arr, int runs)
{
long long start, now;
@@ -356,7 +356,7 @@ static int analysis_phase(int xc_handle,
int i;
xc_shadow_control(xc_handle, domid, XEN_DOMCTL_SHADOW_OP_CLEAN,
- arr, max_pfn, NULL, 0, NULL);
+ arr, p2m_size, NULL, 0, NULL);
DPRINTF("#Flush\n");
for ( i = 0; i < 40; i++ ) {
usleep(50000);
@@ -682,7 +682,7 @@ int xc_linux_save(int xc_handle, int io_
/* base of the region in which domain memory is mapped */
unsigned char *region_base = NULL;
- /* power of 2 order of max_pfn */
+ /* power of 2 order of p2m_size */
int order_nr;
/* bitmap of pages:
@@ -730,7 +730,7 @@ int xc_linux_save(int xc_handle, int io_
goto out;
}
- max_pfn = live_shinfo->arch.max_pfn;
+ p2m_size = live_shinfo->arch.max_pfn;
live_p2m_frame_list_list = map_frame_list_list(xc_handle, dom,
live_shinfo);
@@ -777,7 +777,7 @@ int xc_linux_save(int xc_handle, int io_
memcpy(p2m_frame_list, live_p2m_frame_list, P2M_FL_SIZE);
/* Canonicalise the pfn-to-mfn table frame-number list. */
- for (i = 0; i < max_pfn; i += fpp) {
+ 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,
@@ -813,12 +813,12 @@ int xc_linux_save(int xc_handle, int io_
}
/* pretend we sent all the pages last iteration */
- sent_last_iter = max_pfn;
-
-
- /* calculate the power of 2 order of max_pfn, e.g.
+ sent_last_iter = p2m_size;
+
+
+ /* calculate the power of 2 order of p2m_size, e.g.
15->4 16->4 17->5 */
- for (i = max_pfn-1, order_nr = 0; i ; i >>= 1, order_nr++)
+ for (i = p2m_size-1, order_nr = 0; i ; i >>= 1, order_nr++)
continue;
/* Setup to_send / to_fix and to_skip bitmaps */
@@ -844,7 +844,7 @@ int xc_linux_save(int xc_handle, int io_
return 1;
}
- analysis_phase(xc_handle, dom, max_pfn, to_skip, 0);
+ analysis_phase(xc_handle, dom, p2m_size, to_skip, 0);
/* We want zeroed memory so use calloc rather than malloc. */
pfn_type = calloc(MAX_BATCH_SIZE, sizeof(*pfn_type));
@@ -867,7 +867,7 @@ int xc_linux_save(int xc_handle, int io_
{
int err=0;
unsigned long mfn;
- for (i = 0; i < max_pfn; i++) {
+ for (i = 0; i < p2m_size; i++) {
mfn = live_p2m[i];
if((mfn != INVALID_P2M_ENTRY) && (mfn_to_pfn(mfn) != i)) {
@@ -882,8 +882,8 @@ int xc_linux_save(int xc_handle, int io_
/* Start writing out the saved-domain record. */
- if (!write_exact(io_fd, &max_pfn, sizeof(unsigned long))) {
- ERROR("write: max_pfn");
+ if (!write_exact(io_fd, &p2m_size, sizeof(unsigned long))) {
+ ERROR("write: p2m_size");
goto out;
}
@@ -929,9 +929,9 @@ int xc_linux_save(int xc_handle, int io_
DPRINTF("Saving memory pages: iter %d 0%%", iter);
- while( N < max_pfn ){
-
- unsigned int this_pc = (N * 100) / max_pfn;
+ while( N < p2m_size ){
+
+ unsigned int this_pc = (N * 100) / p2m_size;
if ((this_pc - prev_pc) >= 5) {
DPRINTF("\b\b\b\b%3d%%", this_pc);
@@ -942,7 +942,7 @@ int xc_linux_save(int xc_handle, int io_
but this is fast enough for the moment. */
if (!last_iter && xc_shadow_control(
xc_handle, dom, XEN_DOMCTL_SHADOW_OP_PEEK,
- to_skip, max_pfn, NULL, 0, NULL) != max_pfn) {
+ to_skip, p2m_size, NULL, 0, NULL) != p2m_size) {
ERROR("Error peeking shadow bitmap");
goto out;
}
@@ -950,9 +950,9 @@ int xc_linux_save(int xc_handle, int io_
/* load pfn_type[] with the mfn of all the pages we're doing in
this batch. */
- for (batch = 0; batch < MAX_BATCH_SIZE && N < max_pfn ; N++) {
-
- int n = permute(N, max_pfn, order_nr);
+ for (batch = 0; batch < MAX_BATCH_SIZE && N < p2m_size ; N++) {
+
+ int n = permute(N, p2m_size, order_nr);
if (debug) {
DPRINTF("%d pfn= %08lx mfn= %08lx %d [mfn]= %08lx\n",
@@ -1123,7 +1123,7 @@ int xc_linux_save(int xc_handle, int io_
print_stats( xc_handle, dom, sent_this_iter, &stats, 1);
DPRINTF("Total pages sent= %ld (%.2fx)\n",
- total_sent, ((float)total_sent)/max_pfn );
+ total_sent, ((float)total_sent)/p2m_size );
DPRINTF("(of which %ld were fixups)\n", needed_to_fix );
}
@@ -1150,7 +1150,7 @@ int xc_linux_save(int xc_handle, int io_
if (((sent_this_iter > sent_last_iter) && RATE_IS_MAX()) ||
(iter >= max_iters) ||
(sent_this_iter+skip_this_iter < 50) ||
- (total_sent > max_pfn*max_factor)) {
+ (total_sent > p2m_size*max_factor)) {
DPRINTF("Start last iteration\n");
last_iter = 1;
@@ -1168,7 +1168,7 @@ int xc_linux_save(int xc_handle, int io_
if (xc_shadow_control(xc_handle, dom,
XEN_DOMCTL_SHADOW_OP_CLEAN, to_send,
- max_pfn, NULL, 0, &stats) != max_pfn) {
+ p2m_size, NULL, 0, &stats) != p2m_size) {
ERROR("Error flushing shadow PT");
goto out;
}
@@ -1220,7 +1220,7 @@ int xc_linux_save(int xc_handle, int io_
unsigned int i,j;
unsigned long pfntab[1024];
- for (i = 0, j = 0; i < max_pfn; i++) {
+ for (i = 0, j = 0; i < p2m_size; i++) {
if (!is_mapped(live_p2m[i]))
j++;
}
@@ -1230,13 +1230,13 @@ int xc_linux_save(int xc_handle, int io_
goto out;
}
- for (i = 0, j = 0; i < max_pfn; ) {
+ for (i = 0, j = 0; i < p2m_size; ) {
if (!is_mapped(live_p2m[i]))
pfntab[j++] = i;
i++;
- if (j == 1024 || i == max_pfn) {
+ if (j == 1024 || i == p2m_size) {
if(!write_exact(io_fd, &pfntab, sizeof(unsigned long)*j)) {
ERROR("Error when writing to state file (6b) (errno %d)",
errno);
@@ -1333,7 +1333,7 @@ int xc_linux_save(int xc_handle, int io_
munmap(live_p2m_frame_list, P2M_FLL_ENTRIES * PAGE_SIZE);
if (live_p2m)
- munmap(live_p2m, P2M_SIZE);
+ munmap(live_p2m, ROUNDUP(p2m_size * sizeof(xen_pfn_t), PAGE_SHIFT));
if (live_m2p)
munmap(live_m2p, M2P_SIZE(max_mfn));
diff -r 9695cc13c48c -r d05a3220ea05 tools/libxc/xc_resume.c
--- a/tools/libxc/xc_resume.c Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/libxc/xc_resume.c Mon Apr 02 16:46:52 2007 +0100
@@ -46,7 +46,7 @@ static int xc_domain_resume_any(int xc_h
xc_dominfo_t info;
int i, rc = -1;
#if defined(__i386__) || defined(__x86_64__)
- unsigned long mfn, max_pfn = 0;
+ unsigned long mfn, p2m_size = 0;
vcpu_guest_context_t ctxt;
start_info_t *start_info;
shared_info_t *shinfo = NULL;
@@ -74,7 +74,7 @@ static int xc_domain_resume_any(int xc_h
goto out;
}
- max_pfn = shinfo->arch.max_pfn;
+ p2m_size = shinfo->arch.max_pfn;
p2m_frame_list_list =
xc_map_foreign_range(xc_handle, domid, PAGE_SIZE, PROT_READ,
diff -r 9695cc13c48c -r d05a3220ea05 tools/libxc/xenguest.h
--- a/tools/libxc/xenguest.h Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/libxc/xenguest.h Mon Apr 02 16:46:52 2007 +0100
@@ -43,15 +43,16 @@ int xc_hvm_save(int xc_handle, int io_fd
* @parm xc_handle a handle to an open hypervisor interface
* @parm fd the file descriptor to restore a domain from
* @parm dom the id of the domain
- * @parm nr_pfns the number of pages
+ * @parm p2m_size number of pages the guest has (i.e. number entries in P2M)
+ * @parm max_nr_pfns domains maximum real memory allocation, in pages
* @parm store_evtchn the store event channel for this domain to use
* @parm store_mfn returned with the mfn of the store page
* @return 0 on success, -1 on failure
*/
int xc_linux_restore(int xc_handle, int io_fd, uint32_t dom,
- unsigned long nr_pfns, unsigned int store_evtchn,
- unsigned long *store_mfn, unsigned int console_evtchn,
- unsigned long *console_mfn);
+ unsigned long p2m_size, unsigned long max_nr_pfns,
+ unsigned int store_evtchn, unsigned long *store_mfn,
+ unsigned int console_evtchn, unsigned long *console_mfn);
/**
* This function will restore a saved hvm domain running unmodified guest.
diff -r 9695cc13c48c -r d05a3220ea05 tools/libxc/xg_private.h
--- a/tools/libxc/xg_private.h Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/libxc/xg_private.h Mon Apr 02 16:46:52 2007 +0100
@@ -148,17 +148,16 @@ typedef l4_pgentry_64_t l4_pgentry_t;
#define ROUNDUP(_x,_w) (((unsigned long)(_x)+(1UL<<(_w))-1) & ~((1UL<<(_w))-1))
-/* Size in bytes of the P2M (rounded up to the nearest PAGE_SIZE bytes) */
-#define P2M_SIZE ROUNDUP((max_pfn * sizeof(xen_pfn_t)), PAGE_SHIFT)
-
/* Number of xen_pfn_t in a page */
#define fpp (PAGE_SIZE/sizeof(xen_pfn_t))
+/* XXX SMH: following 3 skanky macros rely on variable p2m_size being set */
+
/* Number of entries in the pfn_to_mfn_frame_list_list */
-#define P2M_FLL_ENTRIES (((max_pfn)+(fpp*fpp)-1)/(fpp*fpp))
+#define P2M_FLL_ENTRIES (((p2m_size)+(fpp*fpp)-1)/(fpp*fpp))
/* Number of entries in the pfn_to_mfn_frame_list */
-#define P2M_FL_ENTRIES (((max_pfn)+fpp-1)/fpp)
+#define P2M_FL_ENTRIES (((p2m_size)+fpp-1)/fpp)
/* Size in bytes of the pfn_to_mfn_frame_list */
#define P2M_FL_SIZE ((P2M_FL_ENTRIES)*sizeof(unsigned long))
diff -r 9695cc13c48c -r d05a3220ea05 tools/python/xen/xend/XendCheckpoint.py
--- a/tools/python/xen/xend/XendCheckpoint.py Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/python/xen/xend/XendCheckpoint.py Mon Apr 02 16:46:52 2007 +0100
@@ -187,6 +187,7 @@ def restore(xd, fd, dominfo = None, paus
assert console_port
nr_pfns = (dominfo.getMemoryTarget() + 3) / 4
+ max_nr_pfns = (dominfo.getMemoryMaximum() + 3) / 4
# if hvm, pass mem size to calculate the store_mfn
image_cfg = dominfo.info.get('image', {})
@@ -203,17 +204,17 @@ def restore(xd, fd, dominfo = None, paus
try:
l = read_exact(fd, sizeof_unsigned_long,
"not a valid guest state file: pfn count read")
- max_pfn = unpack("L", l)[0] # native sizeof long
-
- if max_pfn > 16*1024*1024: # XXX
+ p2m_size = unpack("L", l)[0] # native sizeof long
+
+ if p2m_size > 16*1024*1024: # XXX
raise XendError(
"not a valid guest state file: pfn count out of range")
shadow = dominfo.info['shadow_memory']
log.debug("restore:shadow=0x%x, _static_max=0x%x, _static_min=0x%x, "
- "nr_pfns=0x%x.", dominfo.info['shadow_memory'],
+ "p2m_size=0x%x.", dominfo.info['shadow_memory'],
dominfo.info['memory_static_max'],
- dominfo.info['memory_static_min'], nr_pfns)
+ dominfo.info['memory_static_min'], p2m_size)
balloon.free(xc.pages_to_kib(nr_pfns) + shadow * 1024)
@@ -221,7 +222,7 @@ def restore(xd, fd, dominfo = None, paus
dominfo.info['shadow_memory'] = shadow_cur
cmd = map(str, [xen.util.auxbin.pathTo(XC_RESTORE),
- fd, dominfo.getDomid(), max_pfn,
+ fd, dominfo.getDomid(), p2m_size, max_nr_pfns,
store_port, console_port, int(is_hvm), pae, apic])
log.debug("[xc_restore]: %s", string.join(cmd))
diff -r 9695cc13c48c -r d05a3220ea05 tools/xcutils/xc_restore.c
--- a/tools/xcutils/xc_restore.c Mon Apr 02 16:26:23 2007 +0100
+++ b/tools/xcutils/xc_restore.c Mon Apr 02 16:46:52 2007 +0100
@@ -18,15 +18,14 @@ int
int
main(int argc, char **argv)
{
- unsigned int xc_fd, io_fd, domid, max_pfn, store_evtchn, console_evtchn;
+ unsigned int xc_fd, io_fd, domid, store_evtchn, console_evtchn;
unsigned int hvm, pae, apic;
int ret;
- unsigned long store_mfn, console_mfn;
+ unsigned long p2m_size, max_nr_pfns, store_mfn, console_mfn;
- if (argc != 9)
- errx(1,
- "usage: %s iofd domid max_pfn store_evtchn console_evtchn hvm pae
apic",
- argv[0]);
+ if (argc != 10)
+ errx(1, "usage: %s iofd domid p2m_size max_nr_pfns store_evtchn "
+ "console_evtchn hvm pae apic", argv[0]);
xc_fd = xc_interface_open();
if (xc_fd < 0)
@@ -34,19 +33,21 @@ main(int argc, char **argv)
io_fd = atoi(argv[1]);
domid = atoi(argv[2]);
- max_pfn = atoi(argv[3]);
- store_evtchn = atoi(argv[4]);
- console_evtchn = atoi(argv[5]);
- hvm = atoi(argv[6]);
- pae = atoi(argv[7]);
- apic = atoi(argv[8]);
+ p2m_size = atoi(argv[3]);
+ max_nr_pfns = atoi(argv[4]);
+ store_evtchn = atoi(argv[5]);
+ console_evtchn = atoi(argv[6]);
+ hvm = atoi(argv[7]);
+ pae = atoi(argv[8]);
+ apic = atoi(argv[9]);
if (hvm) {
- ret = xc_hvm_restore(xc_fd, io_fd, domid, max_pfn, store_evtchn,
+ ret = xc_hvm_restore(xc_fd, io_fd, domid, max_nr_pfns, store_evtchn,
&store_mfn, pae, apic);
- } else
- ret = xc_linux_restore(xc_fd, io_fd, domid, max_pfn, store_evtchn,
- &store_mfn, console_evtchn, &console_mfn);
+ } else
+ ret = xc_linux_restore(xc_fd, io_fd, domid, p2m_size,
+ max_nr_pfns, store_evtchn, &store_mfn,
+ console_evtchn, &console_mfn);
if (ret == 0) {
printf("store-mfn %li\n", store_mfn);
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