From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Cc: akpm-3NddpPZAyC0@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH 1/9] KVM: Improve reporting of vmwrite errors
Date: Fri, 05 Jan 2007 07:50:45 -0000 [thread overview]
Message-ID: <20070105075045.225C3250048@il.qumranet.com> (raw)
In-Reply-To: <459E02E7.5020407-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
This will allow us to see the root cause when a vmwrite error happens.
Signed-off-by: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
Index: linux-2.6/drivers/kvm/vmx.c
===================================================================
--- linux-2.6.orig/drivers/kvm/vmx.c
+++ linux-2.6/drivers/kvm/vmx.c
@@ -152,15 +152,21 @@ static u64 vmcs_read64(unsigned long fie
#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)
-------------------------------------------------------------------------
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next prev parent reply other threads:[~2007-01-05 7:50 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-05 7:48 [PATCH 0/9] KVM: Flush out my patch queue Avi Kivity
[not found] ` <459E02E7.5020407-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-01-05 7:50 ` Avi Kivity [this message]
2007-01-05 7:51 ` [PATCH 2/9] KVM: Initialize vcpu->kvm a little earlier Avi Kivity
2007-01-05 7:52 ` [PATCH 3/9] KVM: Avoid oom on cr3 switch Avi Kivity
2007-01-05 7:53 ` [PATCH 4/9] KVM: Add missing 'break' Avi Kivity
2007-01-05 7:54 ` [PATCH 5/9] KVM: Don't set guest cr3 from vmx_vcpu_setup() Avi Kivity
2007-01-05 7:55 ` [PATCH 6/9] KVM: MMU: Add missing dirty bit Avi Kivity
2007-01-05 7:56 ` [PATCH 7/9] KVM: Make loading cr3 more robust Avi Kivity
2007-01-05 7:57 ` [PATCH 8/9] KVM: Simplify mmu_alloc_roots() Avi Kivity
2007-01-05 7:58 ` [PATCH 9/9] KVM: Simplify test for interrupt window Avi Kivity
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