linux-kernel - [PATCH 2/2] KVM: nVMX: fix flush vpid01 during nested vmentry/vmexit

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:	Wed, 23 Sep 2015 18:26:58 +0800
From:	Wanpeng Li <wanpeng.li@...mail.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
CC:	Jan Kiszka <jan.kiszka@...mens.com>, Bandan Das <bsd@...hat.com>,
	Wincy Van <fanwenyi0529@...il.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Wanpeng Li <wanpeng.li@...mail.com>
Subject: [PATCH 2/2] KVM: nVMX: fix flush vpid01 during nested vmentry/vmexit

vpid_sync_vcpu_single() still handles vpid01 during nested 
vmentry/vmexit since vmx->vpid is used for invvpid. This 
patch fix it by specific the vpid02 through __vmx_flush_tlb() 
to flush the right vpid.

Signed-off-by: Wanpeng Li <wanpeng.li@...mail.com>
---
 arch/x86/kvm/vmx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 7188c5e..31fb631 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -7207,7 +7207,7 @@ static int handle_invvpid(struct kvm_vcpu *vcpu)
 	case VMX_VPID_EXTENT_INDIVIDUAL_ADDR:
 	case VMX_VPID_EXTENT_SINGLE_CONTEXT:
 	case VMX_VPID_EXTENT_ALL_CONTEXT:
-		vmx_flush_tlb(vcpu);
+		__vmx_flush_tlb(vcpu, to_vmx(vcpu)->nested.vpid02);
 		nested_vmx_succeed(vcpu);
 		break;
 	default:
@@ -9501,7 +9501,7 @@ static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
 			vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->nested.vpid02);
 			if (vmcs12->virtual_processor_id != vmx->nested.last_vpid) {
 				vmx->nested.last_vpid = vmcs12->virtual_processor_id;
-				vmx_flush_tlb(vcpu);
+				__vmx_flush_tlb(vcpu, to_vmx(vcpu)->nested.vpid02);
 			}
 		} else {
 			vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/