Mailing List Archive

Page fault is specially handled not only with exception bitmaps,
but also with consideration of page fault error code mask/match
values. Therefore in nested virtualization case, the two values
need to be synchronized from virtual VMCS to shadow VMCS.

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
---
xen/arch/x86/hvm/vmx/vvmx.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index 0a876b0..0bcea19 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -603,6 +603,17 @@ static void nvmx_update_tpr_threshold(struct vcpu *v)
__vmwrite(TPR_THRESHOLD, 0);
}

+static void nvmx_update_pfec(struct vcpu *v)
+{
+ struct nestedvcpu *nvcpu = &vcpu_nestedhvm(v);
+ void *vvmcs = nvcpu->nv_vvmcx;
+
+ __vmwrite(PAGE_FAULT_ERROR_CODE_MASK,
+ __get_vvmcs(vvmcs, PAGE_FAULT_ERROR_CODE_MASK));
+ __vmwrite(PAGE_FAULT_ERROR_CODE_MATCH,
+ __get_vvmcs(vvmcs, PAGE_FAULT_ERROR_CODE_MATCH));
+}
+
static void __clear_current_vvmcs(struct vcpu *v)
{
struct nestedvcpu *nvcpu = &vcpu_nestedhvm(v);
@@ -813,6 +824,7 @@ static void load_shadow_control(struct vcpu *v)
nvmx_update_apic_access_address(v);
nvmx_update_virtual_apic_address(v);
nvmx_update_tpr_threshold(v);
+ nvmx_update_pfec(v);
}

static void load_shadow_guest_state(struct vcpu *v)
--
1.7.1


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