diff options
| author | Borislav Petkov <bp@suse.de> | 2014-01-18 11:48:15 (GMT) |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2014-03-04 16:17:17 (GMT) |
| commit | 11cc851254b4bc3bd4430be8db2a41469303a427 (patch) | |
| tree | 490cfc91f4a07ae31e9cbef87c2a64dad742e2e0 /arch/x86/platform/efi | |
| parent | ef6bea6ddf0e76077d0798e57b374015b23a837e (diff) | |
| download | linux-11cc851254b4bc3bd4430be8db2a41469303a427.tar.xz | |
x86/efi: Dump the EFI page table
This is very useful for debugging issues with the recently added
pagetable switching code for EFI virtual mode.
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'arch/x86/platform/efi')
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 1 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_32.c | 1 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_64.c | 9 |
3 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index 876dc5b..37f20d7 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -1021,6 +1021,7 @@ void __init efi_enter_virtual_mode(void) efi_setup_page_tables(); efi_sync_low_kernel_mappings(); + efi_dump_pagetable(); if (!efi_setup) { status = phys_efi_set_virtual_address_map( diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c index 0b74cdf..39496ae 100644 --- a/arch/x86/platform/efi/efi_32.c +++ b/arch/x86/platform/efi/efi_32.c @@ -41,6 +41,7 @@ static unsigned long efi_rt_eflags; void efi_sync_low_kernel_mappings(void) {} void efi_setup_page_tables(void) {} +void __init efi_dump_pagetable(void) {} void __init efi_map_region(efi_memory_desc_t *md) { diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c index 0c2a234..e05c69b 100644 --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -242,3 +242,12 @@ void __init efi_runtime_mkexec(void) if (__supported_pte_mask & _PAGE_NX) runtime_code_page_mkexec(); } + +void __init efi_dump_pagetable(void) +{ +#ifdef CONFIG_EFI_PGT_DUMP + pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); + + ptdump_walk_pgd_level(NULL, pgd); +#endif +} |