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| author | Andi Kleen <andi@firstfloor.org> | 2009-09-16 11:50:09 +0200 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2009-09-16 11:50:09 +0200 |
| commit | a6e04aa92965565968573a220a35b4e907385697 (patch) | |
| tree | a8f49a97247a0ee14a1442ea2ee4719001785fc7 /arch | |
| parent | a3b947eacfe783df4ca0fe53ef8a764eebc2d0d6 (diff) | |
| download | linux-a6e04aa92965565968573a220a35b4e907385697.tar.gz linux-a6e04aa92965565968573a220a35b4e907385697.tar.bz2 linux-a6e04aa92965565968573a220a35b4e907385697.zip | |
HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler v2
Add VM_FAULT_HWPOISON handling to the x86 page fault handler. This is
very similar to VM_FAULT_OOM, the only difference is that a different
si_code is passed to user space and the new addr_lsb field is initialized.
v2: Make the printk more verbose/unique
Cc: x86@kernel.org
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/fault.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 775a020990a5..8ba562408200 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -167,6 +167,7 @@ force_sig_info_fault(int si_signo, int si_code, unsigned long address, info.si_errno = 0; info.si_code = si_code; info.si_addr = (void __user *)address; + info.si_addr_lsb = si_code == BUS_MCEERR_AR ? PAGE_SHIFT : 0; force_sig_info(si_signo, &info, tsk); } @@ -790,10 +791,12 @@ out_of_memory(struct pt_regs *regs, unsigned long error_code, } static void -do_sigbus(struct pt_regs *regs, unsigned long error_code, unsigned long address) +do_sigbus(struct pt_regs *regs, unsigned long error_code, unsigned long address, + unsigned int fault) { struct task_struct *tsk = current; struct mm_struct *mm = tsk->mm; + int code = BUS_ADRERR; up_read(&mm->mmap_sem); @@ -809,7 +812,15 @@ do_sigbus(struct pt_regs *regs, unsigned long error_code, unsigned long address) tsk->thread.error_code = error_code; tsk->thread.trap_no = 14; - force_sig_info_fault(SIGBUS, BUS_ADRERR, address, tsk); +#ifdef CONFIG_MEMORY_FAILURE + if (fault & VM_FAULT_HWPOISON) { + printk(KERN_ERR + "MCE: Killing %s:%d due to hardware memory corruption fault at %lx\n", + tsk->comm, tsk->pid, address); + code = BUS_MCEERR_AR; + } +#endif + force_sig_info_fault(SIGBUS, code, address, tsk); } static noinline void @@ -819,8 +830,8 @@ mm_fault_error(struct pt_regs *regs, unsigned long error_code, if (fault & VM_FAULT_OOM) { out_of_memory(regs, error_code, address); } else { - if (fault & VM_FAULT_SIGBUS) - do_sigbus(regs, error_code, address); + if (fault & (VM_FAULT_SIGBUS|VM_FAULT_HWPOISON)) + do_sigbus(regs, error_code, address, fault); else BUG(); } |