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| author |   Avi Kivity <avi@qumranet.com> | 2007-01-05 16:36:56 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.osdl.org> | 2007-01-05 23:55:27 -0800 |
| commit | e52de1b8cf85aa2ccaaa253b4397c6d6cc0d4897 (patch) | |
| tree | 70699f72b67d0d62a614248a935925c497847241 /drivers/kvm/vmx.c | |
| parent | [PATCH] KVM: MMU: add audit code to check mappings, etc are correct (diff) | |
| download | linux-dev-e52de1b8cf85aa2ccaaa253b4397c6d6cc0d4897.tar.xz linux-dev-e52de1b8cf85aa2ccaaa253b4397c6d6cc0d4897.zip | |
[PATCH] KVM: Improve reporting of vmwrite errors
This will allow us to see the root cause when a vmwrite error happens.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/kvm/vmx.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index ed3956739771..779d8fc07d31 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -152,15 +152,21 @@ static u64 vmcs_read64(unsigned long field) #endif } +static noinline void vmwrite_error(unsigned long field, unsigned long value) +{ + printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", + field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); + dump_stack(); +} + static void vmcs_writel(unsigned long field, unsigned long value) { u8 error; asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0" : "=q"(error) : "a"(value), "d"(field) : "cc" ); - if (error) - printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", - field, value, vmcs_read32(VM_INSTRUCTION_ERROR)); + if (unlikely(error)) + vmwrite_error(field, value); } static void vmcs_write16(unsigned long field, u16 value) |