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[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>
This commit is contained in:
Avi Kivity 2007-01-05 16:36:56 -08:00 committed by Linus Torvalds
parent 37a7d8b046
commit e52de1b8cf
1 changed files with 9 additions and 3 deletions
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12
drivers/kvm/vmx.c
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@ -152,15 +152,21 @@ static u64 vmcs_read64(unsigned long field)
#endif #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) static void vmcs_writel(unsigned long field, unsigned long value)
{ {
u8 error; u8 error;
asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0" asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0"
: "=q"(error) : "a"(value), "d"(field) : "cc" ); : "=q"(error) : "a"(value), "d"(field) : "cc" );
if (error) if (unlikely(error))
printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n", vmwrite_error(field, value);
field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
} }
static void vmcs_write16(unsigned long field, u16 value) static void vmcs_write16(unsigned long field, u16 value)