[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>
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37a7d8b046
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drivers/kvm
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@ -152,15 +152,21 @@ static u64 vmcs_read64(unsigned long field)
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#endif
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}
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static noinline void vmwrite_error(unsigned long field, unsigned long value)
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{
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printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
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field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
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dump_stack();
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}
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static void vmcs_writel(unsigned long field, unsigned long value)
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{
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u8 error;
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asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0"
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: "=q"(error) : "a"(value), "d"(field) : "cc" );
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if (error)
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printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
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field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
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if (unlikely(error))
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vmwrite_error(field, value);
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}
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static void vmcs_write16(unsigned long field, u16 value)
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