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23576-x86_show_page_walk_also_for_early_page_fa...
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File 23576-x86_show_page_walk_also_for_early_page_faults.patch of Package xen
changeset: 23576:e2235fe267eb user: Jan Beulich <jbeulich@novell.com> date: Thu Jun 23 11:35:55 2011 +0100 files: xen/arch/x86/mm.c xen/arch/x86/traps.c xen/arch/x86/x86_32/mm.c xen/arch/x86/x86_32/traps.c xen/arch/x86/x86_64/mm.c xen/arch/x86/x86_64/traps.c description: x86: show page walk also for early page faults At once, move the common (between 32- and 64-bit) definition of machine_to_phys_mapping_valid to a common location. Signed-off-by: Jan Beulich <jbeulich@novell.com> --- xen/arch/x86/mm.c | 2 ++ xen/arch/x86/traps.c | 1 + xen/arch/x86/x86_32/mm.c | 2 -- xen/arch/x86/x86_32/traps.c | 9 ++++++--- xen/arch/x86/x86_64/mm.c | 2 -- xen/arch/x86/x86_64/traps.c | 12 ++++++++---- 6 files changed, 17 insertions(+), 11 deletions(-) Index: xen-4.1.2-testing/xen/arch/x86/mm.c =================================================================== --- xen-4.1.2-testing.orig/xen/arch/x86/mm.c +++ xen-4.1.2-testing/xen/arch/x86/mm.c @@ -151,6 +151,8 @@ unsigned long __read_mostly pdx_group_va (FRAMETABLE_SIZE / sizeof(*frame_table) + PDX_GROUP_COUNT - 1) / PDX_GROUP_COUNT)] = { [0] = 1 }; +bool_t __read_mostly machine_to_phys_mapping_valid = 0; + #define PAGE_CACHE_ATTRS (_PAGE_PAT|_PAGE_PCD|_PAGE_PWT) bool_t __read_mostly opt_allow_superpage; Index: xen-4.1.2-testing/xen/arch/x86/traps.c =================================================================== --- xen-4.1.2-testing.orig/xen/arch/x86/traps.c +++ xen-4.1.2-testing/xen/arch/x86/traps.c @@ -1428,6 +1428,7 @@ asmlinkage void __init do_early_page_fau unsigned long *stk = (unsigned long *)regs; printk("Early fatal page fault at %04x:%p (cr2=%p, ec=%04x)\n", regs->cs, _p(regs->eip), _p(cr2), regs->error_code); + show_page_walk(cr2); printk("Stack dump: "); while ( ((long)stk & ((PAGE_SIZE - 1) & ~(BYTES_PER_LONG - 1))) != 0 ) printk("%p ", _p(*stk++)); Index: xen-4.1.2-testing/xen/arch/x86/x86_32/mm.c =================================================================== --- xen-4.1.2-testing.orig/xen/arch/x86/x86_32/mm.c +++ xen-4.1.2-testing/xen/arch/x86/x86_32/mm.c @@ -39,8 +39,6 @@ extern l1_pgentry_t l1_identmap[L1_PAGET unsigned int __read_mostly PAGE_HYPERVISOR = __PAGE_HYPERVISOR; unsigned int __read_mostly PAGE_HYPERVISOR_NOCACHE = __PAGE_HYPERVISOR_NOCACHE; -bool_t __read_mostly machine_to_phys_mapping_valid = 0; - static unsigned long __read_mostly mpt_size; void *alloc_xen_pagetable(void) Index: xen-4.1.2-testing/xen/arch/x86/x86_32/traps.c =================================================================== --- xen-4.1.2-testing.orig/xen/arch/x86/x86_32/traps.c +++ xen-4.1.2-testing/xen/arch/x86/x86_32/traps.c @@ -164,7 +164,8 @@ void show_page_walk(unsigned long addr) l3t += (cr3 & 0xFE0UL) >> 3; l3e = l3t[l3_table_offset(addr)]; mfn = l3e_get_pfn(l3e); - pfn = mfn_valid(mfn) ? get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; + pfn = mfn_valid(mfn) && machine_to_phys_mapping_valid ? + get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; printk(" L3[0x%03lx] = %"PRIpte" %08lx\n", l3_table_offset(addr), l3e_get_intpte(l3e), pfn); unmap_domain_page(l3t); @@ -175,7 +176,8 @@ void show_page_walk(unsigned long addr) l2t = map_domain_page(mfn); l2e = l2t[l2_table_offset(addr)]; mfn = l2e_get_pfn(l2e); - pfn = mfn_valid(mfn) ? get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; + pfn = mfn_valid(mfn) && machine_to_phys_mapping_valid ? + get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; printk(" L2[0x%03lx] = %"PRIpte" %08lx %s\n", l2_table_offset(addr), l2e_get_intpte(l2e), pfn, (l2e_get_flags(l2e) & _PAGE_PSE) ? "(PSE)" : ""); @@ -188,7 +190,8 @@ void show_page_walk(unsigned long addr) l1t = map_domain_page(mfn); l1e = l1t[l1_table_offset(addr)]; mfn = l1e_get_pfn(l1e); - pfn = mfn_valid(mfn) ? get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; + pfn = mfn_valid(mfn) && machine_to_phys_mapping_valid ? + get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; printk(" L1[0x%03lx] = %"PRIpte" %08lx\n", l1_table_offset(addr), l1e_get_intpte(l1e), pfn); unmap_domain_page(l1t); Index: xen-4.1.2-testing/xen/arch/x86/x86_64/mm.c =================================================================== --- xen-4.1.2-testing.orig/xen/arch/x86/x86_64/mm.c +++ xen-4.1.2-testing/xen/arch/x86/x86_64/mm.c @@ -47,8 +47,6 @@ unsigned int __read_mostly pfn_pdx_hole_ unsigned int __read_mostly m2p_compat_vstart = __HYPERVISOR_COMPAT_VIRT_START; -bool_t __read_mostly machine_to_phys_mapping_valid = 0; - /* Top-level master (and idle-domain) page directory. */ l4_pgentry_t __attribute__ ((__section__ (".bss.page_aligned"))) idle_pg_table[L4_PAGETABLE_ENTRIES]; Index: xen-4.1.2-testing/xen/arch/x86/x86_64/traps.c =================================================================== --- xen-4.1.2-testing.orig/xen/arch/x86/x86_64/traps.c +++ xen-4.1.2-testing/xen/arch/x86/x86_64/traps.c @@ -176,7 +176,8 @@ void show_page_walk(unsigned long addr) l4t = mfn_to_virt(mfn); l4e = l4t[l4_table_offset(addr)]; mfn = l4e_get_pfn(l4e); - pfn = mfn_valid(mfn) ? get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; + pfn = mfn_valid(mfn) && machine_to_phys_mapping_valid ? + get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; printk(" L4[0x%03lx] = %"PRIpte" %016lx\n", l4_table_offset(addr), l4e_get_intpte(l4e), pfn); if ( !(l4e_get_flags(l4e) & _PAGE_PRESENT) || @@ -186,7 +187,8 @@ void show_page_walk(unsigned long addr) l3t = mfn_to_virt(mfn); l3e = l3t[l3_table_offset(addr)]; mfn = l3e_get_pfn(l3e); - pfn = mfn_valid(mfn) ? get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; + pfn = mfn_valid(mfn) && machine_to_phys_mapping_valid ? + get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; printk(" L3[0x%03lx] = %"PRIpte" %016lx%s\n", l3_table_offset(addr), l3e_get_intpte(l3e), pfn, (l3e_get_flags(l3e) & _PAGE_PSE) ? " (PSE)" : ""); @@ -198,7 +200,8 @@ void show_page_walk(unsigned long addr) l2t = mfn_to_virt(mfn); l2e = l2t[l2_table_offset(addr)]; mfn = l2e_get_pfn(l2e); - pfn = mfn_valid(mfn) ? get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; + pfn = mfn_valid(mfn) && machine_to_phys_mapping_valid ? + get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; printk(" L2[0x%03lx] = %"PRIpte" %016lx %s\n", l2_table_offset(addr), l2e_get_intpte(l2e), pfn, (l2e_get_flags(l2e) & _PAGE_PSE) ? "(PSE)" : ""); @@ -210,7 +213,8 @@ void show_page_walk(unsigned long addr) l1t = mfn_to_virt(mfn); l1e = l1t[l1_table_offset(addr)]; mfn = l1e_get_pfn(l1e); - pfn = mfn_valid(mfn) ? get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; + pfn = mfn_valid(mfn) && machine_to_phys_mapping_valid ? + get_gpfn_from_mfn(mfn) : INVALID_M2P_ENTRY; printk(" L1[0x%03lx] = %"PRIpte" %016lx\n", l1_table_offset(addr), l1e_get_intpte(l1e), pfn); }
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