# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1171549681 0
# Node ID 9ffe8922414f2a0c8e8471e336f21694d203d1cf
# Parent 96d08345f1c51160a6625b102907192734e47f40
Lift physical address restriction in save/restore code.
Bump this to 44 bits for x86-32 and 52 bits for x86-64.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
---
tools/libxc/xc_linux_restore.c | 6 +++---
tools/libxc/xc_linux_save.c | 8 ++++----
tools/libxc/xc_pagetab.c | 4 ++--
tools/libxc/xg_private.h | 7 +++++++
4 files changed, 16 insertions(+), 9 deletions(-)
diff -r 96d08345f1c5 -r 9ffe8922414f tools/libxc/xc_linux_restore.c
--- a/tools/libxc/xc_linux_restore.c Thu Feb 15 14:25:58 2007 +0000
+++ b/tools/libxc/xc_linux_restore.c Thu Feb 15 14:28:01 2007 +0000
@@ -82,7 +82,7 @@ static int uncanonicalize_pagetable(int
if(!(pte & _PAGE_PRESENT))
continue;
- pfn = (pte >> PAGE_SHIFT) & 0xffffffff;
+ pfn = (pte >> PAGE_SHIFT) & MFN_MASK_X86;
if(pfn >= max_pfn) {
/* This "page table page" is probably not one; bail. */
@@ -120,12 +120,12 @@ static int uncanonicalize_pagetable(int
if(!(pte & _PAGE_PRESENT))
continue;
- pfn = (pte >> PAGE_SHIFT) & 0xffffffff;
+ pfn = (pte >> PAGE_SHIFT) & MFN_MASK_X86;
if(p2m[pfn] == INVALID_P2M_ENTRY)
p2m[pfn] = p2m_batch[nr_mfns++];
- pte &= 0xffffff0000000fffULL;
+ pte &= ~MADDR_MASK_X86;
pte |= (uint64_t)p2m[pfn] << PAGE_SHIFT;
if(pt_levels == 2)
diff -r 96d08345f1c5 -r 9ffe8922414f tools/libxc/xc_linux_save.c
--- a/tools/libxc/xc_linux_save.c Thu Feb 15 14:25:58 2007 +0000
+++ b/tools/libxc/xc_linux_save.c Thu Feb 15 14:28:01 2007 +0000
@@ -495,7 +495,7 @@ static int canonicalize_pagetable(unsign
hstart = (hvirt_start >> L2_PAGETABLE_SHIFT_PAE) & 0x1ff;
he = ((const uint64_t *) spage)[hstart];
- if ( ((he >> PAGE_SHIFT) & 0x0fffffff) == m2p_mfn0 ) {
+ if ( ((he >> PAGE_SHIFT) & MFN_MASK_X86) == m2p_mfn0 ) {
/* hvirt starts with xen stuff... */
xen_start = hstart;
} else if ( hvirt_start != 0xf5800000 ) {
@@ -503,7 +503,7 @@ static int canonicalize_pagetable(unsign
hstart = (0xf5800000 >> L2_PAGETABLE_SHIFT_PAE) & 0x1ff;
he = ((const uint64_t *) spage)[hstart];
- if( ((he >> PAGE_SHIFT) & 0x0fffffff) == m2p_mfn0 )
+ if( ((he >> PAGE_SHIFT) & MFN_MASK_X86) == m2p_mfn0 )
xen_start = hstart;
}
}
@@ -532,7 +532,7 @@ static int canonicalize_pagetable(unsign
if (pte & _PAGE_PRESENT) {
- mfn = (pte >> PAGE_SHIFT) & 0xfffffff;
+ mfn = (pte >> PAGE_SHIFT) & MFN_MASK_X86;
if (!MFN_IS_IN_PSEUDOPHYS_MAP(mfn)) {
/* This will happen if the type info is stale which
is quite feasible under live migration */
@@ -541,7 +541,7 @@ static int canonicalize_pagetable(unsign
} else
pfn = mfn_to_pfn(mfn);
- pte &= 0xffffff0000000fffULL;
+ pte &= ~MADDR_MASK_X86;
pte |= (uint64_t)pfn << PAGE_SHIFT;
}
diff -r 96d08345f1c5 -r 9ffe8922414f tools/libxc/xc_pagetab.c
--- a/tools/libxc/xc_pagetab.c Thu Feb 15 14:25:58 2007 +0000
+++ b/tools/libxc/xc_pagetab.c Thu Feb 15 14:28:01 2007 +0000
@@ -14,7 +14,7 @@
#define L1_PAGETABLE_SHIFT 12
#define L2_PAGETABLE_SHIFT 22
-#define L0_PAGETABLE_MASK_PAE 0x0000000ffffff000ULL
+#define L0_PAGETABLE_MASK_PAE 0x00000ffffffff000ULL
#define L1_PAGETABLE_MASK_PAE 0x1ffULL
#define L2_PAGETABLE_MASK_PAE 0x1ffULL
#define L3_PAGETABLE_MASK_PAE 0x3ULL
@@ -33,7 +33,7 @@
#define L1_PAGETABLE_SHIFT L1_PAGETABLE_SHIFT_PAE
#define L2_PAGETABLE_SHIFT L2_PAGETABLE_SHIFT_PAE
-#define L0_PAGETABLE_MASK_PAE 0x000000fffffff000ULL
+#define L0_PAGETABLE_MASK_PAE 0x000ffffffffff000ULL
#define L1_PAGETABLE_MASK_PAE 0x1ffULL
#define L2_PAGETABLE_MASK_PAE 0x1ffULL
#define L3_PAGETABLE_MASK_PAE 0x1ffULL
diff -r 96d08345f1c5 -r 9ffe8922414f tools/libxc/xg_private.h
--- a/tools/libxc/xg_private.h Thu Feb 15 14:25:58 2007 +0000
+++ b/tools/libxc/xg_private.h Thu Feb 15 14:28:01 2007 +0000
@@ -134,6 +134,13 @@ typedef l4_pgentry_64_t l4_pgentry_t;
#define PAGE_SHIFT_X86 12
#define PAGE_SIZE_X86 (1UL << PAGE_SHIFT_X86)
#define PAGE_MASK_X86 (~(PAGE_SIZE_X86-1))
+#if defined(__i386__)
+#define MADDR_BITS_X86 44
+#elif defined(__x86_64__)
+#define MADDR_BITS_X86 52
+#endif
+#define MFN_MASK_X86 ((1ULL << (MADDR_BITS_X86 - PAGE_SHIFT_X86)) -
1)
+#define MADDR_MASK_X86 (MFN_MASK_X86 << PAGE_SHIFT_X86)
#define PAGE_SHIFT_IA64 14
#define PAGE_SIZE_IA64 (1UL << PAGE_SHIFT_IA64)
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