[PATCH 1/5] mmu: mark spte present if the x bit is set

From	Bandan Das <bsd@redhat.com>
Newsgroups	linux.kernel
Subject	[PATCH 1/5] mmu: mark spte present if the x bit is set
Date	2016-06-28 06:40 +0200
Message-ID	<rOSYx-1Xl-5@gated-at.bofh.it> (permalink)
References	<rOSYx-1Xl-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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

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[PATCH 1/5] mmu: mark spte present if the x bit is set Bandan Das <bsd@redhat.com> - 2016-06-28 06:40 +0200
  Re: [PATCH 1/5] mmu: mark spte present if the x bit is set Paolo Bonzini <pbonzini@redhat.com> - 2016-06-28 10:50 +0200
    Re: [PATCH 1/5] mmu: mark spte present if the x bit is set Bandan Das <bsd@redhat.com> - 2016-06-28 19:40 +0200
      Re: [PATCH 1/5] mmu: mark spte present if the x bit is set Paolo Bonzini <pbonzini@redhat.com> - 2016-06-28 22:20 +0200
        Re: [PATCH 1/5] mmu: mark spte present if the x bit is set Bandan Das <bsd@redhat.com> - 2016-06-28 22:40 +0200
          Re: [PATCH 1/5] mmu: mark spte present if the x bit is set Paolo Bonzini <pbonzini@redhat.com> - 2016-06-28 22:50 +0200
            Re: [PATCH 1/5] mmu: mark spte present if the x bit is set Bandan Das <bsd@redhat.com> - 2016-06-28 23:10 +0200
            Re: [PATCH 1/5] mmu: mark spte present if the x bit is set Xiao Guangrong <guangrong.xiao@linux.intel.com> - 2016-06-29 05:10 +0200
            Re: [PATCH 1/5] mmu: mark spte present if the x bit is set Wanpeng Li <kernellwp@gmail.com> - 2016-07-05 05:10 +0200
              Re: [PATCH 1/5] mmu: mark spte present if the x bit is set Paolo Bonzini <pbonzini@redhat.com> - 2016-07-05 13:00 +0200
                Re: [PATCH 1/5] mmu: mark spte present if the x bit is set Wanpeng Li <kernellwp@gmail.com> - 2016-07-05 13:40 +0200

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