From: Ștefan Șicleru <ssicl...@bitdefender.com>
If the guest has EPTP switching capabilities with VMFUNC, read the
current view from VMCS instead of walking through the EPTP list when #VE
support is active.
Signed-off-by: Ștefan Șicleru <ssicl...@bitdefender.com>
Signed-off-by: Adalbert Lazăr <ala...@bitdefender.com>
---
arch/x86/kvm/vmx/vmx.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 96aa4b7e2857..035f6c43a2a4 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6269,15 +6269,21 @@ void dump_vmcs(void)
static unsigned int update_ept_view(struct vcpu_vmx *vmx)
{
- u64 *eptp_list = phys_to_virt(page_to_phys(vmx->eptp_list_pg));
- u64 eptp = vmcs_read64(EPT_POINTER);
- unsigned int view;
+ /* if #VE support is active, read the EPT index from VMCS */
+ if (kvm_ve_supported &&
+ secondary_exec_controls_get(vmx) & SECONDARY_EXEC_EPT_VE) {
+ vmx->view = vmcs_read16(EPTP_INDEX);
+ } else {
+ u64 *eptp_list = phys_to_virt(page_to_phys(vmx->eptp_list_pg));
+ u64 eptp = vmcs_read64(EPT_POINTER);
+ unsigned int view;
- for (view = 0; view < KVM_MAX_EPT_VIEWS; view++)
- if (eptp_list[view] == eptp) {
- vmx->view = view;
- break;
- }
+ for (view = 0; view < KVM_MAX_EPT_VIEWS; view++)
+ if (eptp_list[view] == eptp) {
+ vmx->view = view;
+ break;
+ }
+ }
return vmx->view;
}
_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
