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| author | Shaohua Li <shaohua.li@intel.com> | 2010-03-05 01:59:32 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-03-30 20:46:02 +0200 |
| commit | 8ae06d223f8203c72104e5c0c4ee49a000aedb42 (patch) | |
| tree | 42bf4c176833a42e21009d8bd0a61e653d4c3418 /arch | |
| parent | x86: Do not free zero sized per cpu areas (diff) | |
| download | linux-8ae06d223f8203c72104e5c0c4ee49a000aedb42.tar.xz linux-8ae06d223f8203c72104e5c0c4ee49a000aedb42.zip | |
x86-32, resume: do a global tlb flush in S4 resume
Colin King reported a strange oops in S4 resume code path (see below). The test
system has i5/i7 CPU. The kernel doesn't open PAE, so 4M page table is used.
The oops always happen a virtual address 0xc03ff000, which is mapped to the
last 4k of first 4M memory. Doing a global tlb flush fixes the issue.
EIP: 0060:[<c0493a01>] EFLAGS: 00010086 CPU: 0
EIP is at copy_loop+0xe/0x15
EAX: 36aeb000 EBX: 00000000 ECX: 00000400 EDX: f55ad46c
ESI: 0f800000 EDI: c03ff000 EBP: f67fbec4 ESP: f67fbea8
DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
...
...
CR2: 00000000c03ff000
Tested-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
LKML-Reference: <20100305005932.GA22675@sli10-desk.sh.intel.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: <stable@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/power/hibernate_asm_32.S | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/x86/power/hibernate_asm_32.S b/arch/x86/power/hibernate_asm_32.S index b641388d8286..ad47daeafa4e 100644 --- a/arch/x86/power/hibernate_asm_32.S +++ b/arch/x86/power/hibernate_asm_32.S @@ -27,10 +27,17 @@ ENTRY(swsusp_arch_suspend) ret ENTRY(restore_image) + movl mmu_cr4_features, %ecx movl resume_pg_dir, %eax subl $__PAGE_OFFSET, %eax movl %eax, %cr3 + jecxz 1f # cr4 Pentium and higher, skip if zero + andl $~(X86_CR4_PGE), %ecx + movl %ecx, %cr4; # turn off PGE + movl %cr3, %eax; # flush TLB + movl %eax, %cr3 +1: movl restore_pblist, %edx .p2align 4,,7 @@ -54,16 +61,8 @@ done: movl $swapper_pg_dir, %eax subl $__PAGE_OFFSET, %eax movl %eax, %cr3 - /* Flush TLB, including "global" things (vmalloc) */ movl mmu_cr4_features, %ecx jecxz 1f # cr4 Pentium and higher, skip if zero - movl %ecx, %edx - andl $~(X86_CR4_PGE), %edx - movl %edx, %cr4; # turn off PGE -1: - movl %cr3, %eax; # flush TLB - movl %eax, %cr3 - jecxz 1f # cr4 Pentium and higher, skip if zero movl %ecx, %cr4; # turn PGE back on 1: |