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From: Bandan Das <bsd@redhat.com>
To: kvm@vger.kernel.org
Cc: pbonzini@redhat.com, guangrong.xiao@linux.intel.com,
	linux-kernel@vger.kernel.org
Subject: [PATCH 5/5] nvmx: advertise support for ept execute only
Date: Tue, 28 Jun 2016 00:32:40 -0400	[thread overview]
Message-ID: <1467088360-10186-6-git-send-email-bsd@redhat.com> (raw)
In-Reply-To: <1467088360-10186-1-git-send-email-bsd@redhat.com>

KVM MMU now knows about execute only mappings, so
advertise the feature to L1 hypervisors

Signed-off-by: Bandan Das <bsd@redhat.com>
---
 arch/x86/kvm/vmx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 417debc..0fe61a3 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2717,6 +2717,9 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
 		vmx->nested.nested_vmx_ept_caps = VMX_EPT_PAGE_WALK_4_BIT |
 			 VMX_EPTP_WB_BIT | VMX_EPT_2MB_PAGE_BIT |
 			 VMX_EPT_INVEPT_BIT;
+		if (cpu_has_vmx_ept_execute_only())
+			vmx->nested.nested_vmx_ept_caps |=
+				VMX_EPT_EXECUTE_ONLY_BIT;
 		vmx->nested.nested_vmx_ept_caps &= vmx_capability.ept;
 		/*
 		 * For nested guests, we don't do anything specific
-- 
2.5.5

      parent reply	other threads:[~2016-06-28  4:32 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-28  4:32 [PATCH 0/5] Add support for EPT execute only for nested hypervisors Bandan Das
2016-06-28  4:32 ` [PATCH 1/5] mmu: mark spte present if the x bit is set Bandan Das
2016-06-28  8:44   ` Paolo Bonzini
2016-06-28 17:33     ` Bandan Das
2016-06-28 20:17       ` Paolo Bonzini
2016-06-28 20:37         ` Bandan Das
2016-06-28 20:49           ` Paolo Bonzini
2016-06-28 21:04             ` Bandan Das
2016-06-29  3:01             ` Xiao Guangrong
2016-07-05  3:06             ` Wanpeng Li
2016-07-05 10:50               ` Paolo Bonzini
2016-07-05 11:29                 ` Wanpeng Li
2016-06-28  4:32 ` [PATCH 2/5] mmu: pass execonly value when initializing rsvd bits Bandan Das
2016-06-29  3:07   ` Xiao Guangrong
2016-06-28  4:32 ` [PATCH 3/5] mmu: don't set the present bit unconditionally Bandan Das
2016-06-28  8:57   ` Paolo Bonzini
2016-06-28 17:30     ` Bandan Das
2016-06-28 20:21       ` Paolo Bonzini
2016-07-05  5:50     ` Wanpeng Li
2016-07-05 10:50       ` Paolo Bonzini
2016-06-29  3:17   ` Xiao Guangrong
2016-06-29  8:18     ` Paolo Bonzini
2016-06-30  7:18       ` Xiao Guangrong
2016-06-28  4:32 ` [PATCH 4/5] mmu: remove is_present_gpte() Bandan Das
2016-06-28  4:32 ` Bandan Das [this message]

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