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authorHe, Qing <qing.he@intel.com>2007-09-12 14:18:28 +0800
committerAvi Kivity <avi@qumranet.com>2007-10-13 10:18:28 +0200
commitbfdaab090386e7dda8c442721eeb91179258dad4 (patch)
tree35c7a10421a67316c0aa87f70b11db829137e4b9 /drivers/kvm
parent04d2cc7780d48a212843e38d46402d97fa1f4774 (diff)
downloadlinux-bfdaab090386e7dda8c442721eeb91179258dad4.tar.bz2
KVM: VMX: Fix exit qualification width on i386
According to Intel Software Developer's Manual, Vol. 3B, Appendix H.4.2, exit qualification should be of natural width. However, current code uses u64 as the data type for this register, which occasionally introduces invalid value to VMExit handling logics. This patch fixes this bug. I have tested Windows and Linux guest on i386 host, and they can boot successfully with this patch. Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm')
-rw-r--r--drivers/kvm/vmx.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index fa4277d520ca..c44c9ac79ca5 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1840,12 +1840,12 @@ static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
- u64 exit_qualification;
+ unsigned long exit_qualification;
int size, down, in, string, rep;
unsigned port;
++vcpu->stat.io_exits;
- exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
+ exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
string = (exit_qualification & 16) != 0;
if (string) {
@@ -1877,11 +1877,11 @@ vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
- u64 exit_qualification;
+ unsigned long exit_qualification;
int cr;
int reg;
- exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
+ exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
cr = exit_qualification & 15;
reg = (exit_qualification >> 8) & 15;
switch ((exit_qualification >> 4) & 3) {
@@ -1950,7 +1950,7 @@ static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
- u64 exit_qualification;
+ unsigned long exit_qualification;
unsigned long val;
int dr, reg;
@@ -1958,7 +1958,7 @@ static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
* FIXME: this code assumes the host is debugging the guest.
* need to deal with guest debugging itself too.
*/
- exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
+ exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
dr = exit_qualification & 7;
reg = (exit_qualification >> 8) & 15;
vcpu_load_rsp_rip(vcpu);