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KVM: VMX: Return 0 from a failed VMREAD

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If we execute VMREAD during reboot we'll just skip over it.  Instead of
returning garbage, return 0, which has a much smaller chance of confusing
the code.  Otherwise we risk a flood of debug printk()s which block the
reboot process if a serial console or netconsole is enabled.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2010-12-02 17:55:23 +02:00
parent b7c4145ba2
commit a295673aba
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kvm/vmx.c
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@ -565,10 +565,10 @@ static inline void ept_sync_individual_addr(u64 eptp, gpa_t gpa)
static unsigned long vmcs_readl(unsigned long field)
{
unsigned long value;
unsigned long value = 0;
asm volatile (__ex(ASM_VMX_VMREAD_RDX_RAX)
: "=a"(value) : "d"(field) : "cc");
: "+a"(value) : "d"(field) : "cc");
return value;
}