svn commit: r283308 - head/sys/amd64/vmm
Neel Natu
neel at FreeBSD.org
Sat May 23 01:17:51 UTC 2015
Author: neel
Date: Sat May 23 01:17:50 2015
New Revision: 283308
URL: https://svnweb.freebsd.org/changeset/base/283308
Log:
Exceptions don't deliver an error code in real mode.
MFC after: 1 week
Modified:
head/sys/amd64/vmm/vmm.c
Modified: head/sys/amd64/vmm/vmm.c
==============================================================================
--- head/sys/amd64/vmm/vmm.c Sat May 23 00:32:58 2015 (r283307)
+++ head/sys/amd64/vmm/vmm.c Sat May 23 01:17:50 2015 (r283308)
@@ -1785,6 +1785,7 @@ vm_inject_exception(struct vm *vm, int v
uint32_t errcode, int restart_instruction)
{
struct vcpu *vcpu;
+ uint64_t regval;
int error;
if (vcpuid < 0 || vcpuid >= VM_MAXCPU)
@@ -1809,6 +1810,16 @@ vm_inject_exception(struct vm *vm, int v
return (EBUSY);
}
+ if (errcode_valid) {
+ /*
+ * Exceptions don't deliver an error code in real mode.
+ */
+ error = vm_get_register(vm, vcpuid, VM_REG_GUEST_CR0, ®val);
+ KASSERT(!error, ("%s: error %d getting CR0", __func__, error));
+ if (!(regval & CR0_PE))
+ errcode_valid = 0;
+ }
+
/*
* From section 26.6.1 "Interruptibility State" in Intel SDM:
*
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