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authorHuang Ying <ying.huang@intel.com>2009-03-04 10:58:33 +0800
committerIngo Molnar <mingo@elte.hu>2009-03-04 19:20:16 +0100
commitdd39ecf522ba86c70809715af46e6557f6491131 (patch)
treea7028e98fcc310cc2dba14d0a218d47a69db8eba /arch/x86/kernel/efi.c
parentff0c0874905fb312ca1491bbdac2653b0b48c20b (diff)
downloadblackbird-op-linux-dd39ecf522ba86c70809715af46e6557f6491131.tar.gz
blackbird-op-linux-dd39ecf522ba86c70809715af46e6557f6491131.zip
x86: EFI: Back efi_ioremap with init_memory_mapping instead of FIX_MAP
Impact: Fix boot failure on EFI system with large runtime memory range Brian Maly reported that some EFI system with large runtime memory range can not boot. Because the FIX_MAP used to map runtime memory range is smaller than run time memory range. This patch fixes this issue by re-implement efi_ioremap() with init_memory_mapping(). Reported-and-tested-by: Brian Maly <bmaly@redhat.com> Signed-off-by: Huang Ying <ying.huang@intel.com> Cc: Brian Maly <bmaly@redhat.com> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236135513.6204.306.camel@yhuang-dev.sh.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/efi.c')
-rw-r--r--arch/x86/kernel/efi.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/kernel/efi.c b/arch/x86/kernel/efi.c
index 1119d247fe11..eb1ef3b67dd5 100644
--- a/arch/x86/kernel/efi.c
+++ b/arch/x86/kernel/efi.c
@@ -467,7 +467,7 @@ void __init efi_enter_virtual_mode(void)
efi_memory_desc_t *md;
efi_status_t status;
unsigned long size;
- u64 end, systab, addr, npages;
+ u64 end, systab, addr, npages, end_pfn;
void *p, *va;
efi.systab = NULL;
@@ -479,7 +479,10 @@ void __init efi_enter_virtual_mode(void)
size = md->num_pages << EFI_PAGE_SHIFT;
end = md->phys_addr + size;
- if (PFN_UP(end) <= max_low_pfn_mapped)
+ end_pfn = PFN_UP(end);
+ if (end_pfn <= max_low_pfn_mapped
+ || (end_pfn > (1UL << (32 - PAGE_SHIFT))
+ && end_pfn <= max_pfn_mapped))
va = __va(md->phys_addr);
else
va = efi_ioremap(md->phys_addr, size);
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