From: Ahmed Abd El Mawgood <ahmedsoliman@mena.vt.edu>
To: Paolo Bonzini <pbonzini@redhat.com>,
rkrcmar@redhat.com, Jonathan Corbet <corbet@lwn.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
hpa@zytor.com, x86@kernel.org, kvm@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
ahmedsoliman0x666@gmail.com, ovich00@gmail.com,
kernel-hardening@lists.openwall.com, nigel.edwards@hpe.com,
Boris Lukashev <blukashev@sempervictus.com>,
Igor Stoppa <igor.stoppa@gmail.com>
Cc: Ahmed Abd El Mawgood <ahmedsoliman@mena.vt.edu>
Subject: [PATCH 03/10] KVM: X86: Add helper function to convert SPTE to GFN
Date: Fri, 7 Dec 2018 14:47:56 +0200 [thread overview]
Message-ID: <20181207124803.10828-4-ahmedsoliman@mena.vt.edu> (raw)
In-Reply-To: <20181207124803.10828-1-ahmedsoliman@mena.vt.edu>
Signed-off-by: Ahmed Abd El Mawgood <ahmedsoliman@mena.vt.edu>
---
arch/x86/kvm/mmu.c | 7 +++++++
arch/x86/kvm/mmu.h | 1 +
2 files changed, 8 insertions(+)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index b67d743c33..a300e4acb8 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1024,6 +1024,13 @@ static gfn_t kvm_mmu_page_get_gfn(struct kvm_mmu_page *sp, int index)
return sp->gfn + (index << ((sp->role.level - 1) * PT64_LEVEL_BITS));
}
+gfn_t spte_to_gfn(u64 *spte)
+{
+ struct kvm_mmu_page *sp;
+
+ sp = page_header(__pa(spte));
+ return kvm_mmu_page_get_gfn(sp, spte - sp->spt);
+}
static void kvm_mmu_page_set_gfn(struct kvm_mmu_page *sp, int index, gfn_t gfn)
{
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index c7b333147c..49d7f2f002 100644
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -211,4 +211,5 @@ void kvm_mmu_gfn_allow_lpage(struct kvm_memory_slot *slot, gfn_t gfn);
bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm,
struct kvm_memory_slot *slot, u64 gfn);
int kvm_arch_write_log_dirty(struct kvm_vcpu *vcpu);
+gfn_t spte_to_gfn(u64 *sptep);
#endif
--
2.19.2
next prev parent reply other threads:[~2018-12-07 12:49 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-07 12:47 [PATCH V7 0/10] KVM: X86: Introducing ROE Protection Kernel Hardening Ahmed Abd El Mawgood
2018-12-07 12:47 ` [PATCH 01/10] KVM: State whether memory should be freed in kvm_free_memslot Ahmed Abd El Mawgood
2018-12-07 12:47 ` [PATCH 02/10] KVM: X86: Add arbitrary data pointer in kvm memslot iterator functions Ahmed Abd El Mawgood
2018-12-07 12:47 ` Ahmed Abd El Mawgood [this message]
2018-12-07 12:47 ` [PATCH 04/10] KVM: Document Memory ROE Ahmed Abd El Mawgood
2018-12-07 12:47 ` [PATCH 05/10] KVM: Create architecture independent ROE skeleton Ahmed Abd El Mawgood
2018-12-07 12:47 ` [PATCH 06/10] KVM: X86: Enable ROE for x86 Ahmed Abd El Mawgood
2018-12-07 12:48 ` [PATCH 07/10] KVM: Add support for byte granular memory ROE Ahmed Abd El Mawgood
2018-12-07 12:48 ` [PATCH 08/10] KVM: X86: Port ROE_MPROTECT_CHUNK to x86 Ahmed Abd El Mawgood
2018-12-07 12:48 ` [PATCH 09/10] KVM: Add new exit reason For ROE violations Ahmed Abd El Mawgood
2018-12-07 12:48 ` [PATCH 10/10] KVM: Log ROE violations in system log Ahmed Abd El Mawgood
2018-12-07 16:23 ` RESEND " Ahmed Abd El Mawgood
2018-12-13 13:36 ` [PATCH V7 0/10] KVM: X86: Introducing ROE Protection Kernel Hardening Stecklina, Julian
2018-12-13 16:00 ` Ahmed Soliman
2018-12-21 14:05 ` Ahmed Soliman
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