From: Bandan Das <bsd@redhat.com>
To: kvm@vger.kernel.org
Cc: pbonzini@redhat.com, guangrong.xiao@linux.intel.com,
kernellwp@gmail.com, linux-kernel@vger.kernel.org
Subject: [PATCH v2 5/5] vmx: advertise support for ept execute only
Date: Tue, 12 Jul 2016 18:18:52 -0400 [thread overview]
Message-ID: <1468361932-16580-6-git-send-email-bsd@redhat.com> (raw)
In-Reply-To: <1468361932-16580-1-git-send-email-bsd@redhat.com>
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 f73b5dc..2c49355f 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
next prev parent reply other threads:[~2016-07-12 22:18 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-12 22:18 [PATCH v2 0/5] Add support for EPT execute only for nested hypervisors Bandan Das
2016-07-12 22:18 ` [PATCH v2 1/5] mmu: extend the is_present check to 32 bits Bandan Das
2016-09-01 14:20 ` Li, Liang Z
2016-09-01 15:16 ` Paolo Bonzini
2016-07-12 22:18 ` [PATCH v2 2/5] mmu: don't set the present bit unconditionally Bandan Das
2016-07-13 8:10 ` Paolo Bonzini
2016-07-12 22:18 ` [PATCH v2 3/5] mmu: remove is_present_gpte() Bandan Das
2016-07-12 22:18 ` [PATCH v2 4/5] mmu: change unconditional setting of the u bit in fault bitmap Bandan Das
2016-07-13 8:23 ` Paolo Bonzini
2016-07-13 9:06 ` Paolo Bonzini
2016-07-12 22:18 ` Bandan Das [this message]
2016-07-13 9:20 ` [PATCH v2 0/5] Add support for EPT execute only for nested hypervisors Paolo Bonzini
2016-07-13 9:49 ` Fam Zheng
2016-07-13 10:03 ` Paolo Bonzini
2016-07-13 15:06 ` Bandan Das
2016-07-13 15:27 ` Paolo Bonzini
2016-07-13 15:47 ` Bandan Das
2016-07-14 6:56 ` Paolo Bonzini
2016-07-14 17:38 ` Bandan Das
2016-07-14 18:29 ` Paolo Bonzini
2016-07-14 18:52 ` Bandan Das
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