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 1/5] mmu: mark spte present if the x bit is set
Date: Tue, 28 Jun 2016 00:32:36 -0400 [thread overview]
Message-ID: <1467088360-10186-2-git-send-email-bsd@redhat.com> (raw)
In-Reply-To: <1467088360-10186-1-git-send-email-bsd@redhat.com>
This is safe because is_shadow_present_pte() is called
on host controlled page table and we know the spte is
valid
Signed-off-by: Bandan Das <bsd@redhat.com>
---
arch/x86/kvm/mmu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index def97b3..a50af79 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -304,7 +304,8 @@ static int is_nx(struct kvm_vcpu *vcpu)
static int is_shadow_present_pte(u64 pte)
{
- return pte & PT_PRESENT_MASK && !is_mmio_spte(pte);
+ return pte & (PT_PRESENT_MASK | shadow_x_mask) &&
+ !is_mmio_spte(pte);
}
static int is_large_pte(u64 pte)
--
2.5.5
next prev parent reply other threads:[~2016-06-28 4:33 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 ` Bandan Das [this message]
2016-06-28 8:44 ` [PATCH 1/5] mmu: mark spte present if the x bit is set 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 ` [PATCH 5/5] nvmx: advertise support for ept execute only Bandan Das
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