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Date: Sun, 6 Jan 2019 21:23:42 +0200
From: Ahmed Abd El Mawgood <ahmedsoliman@...a.vt.edu>
To: Paolo Bonzini <pbonzini@...hat.com>,
rkrcmar@...hat.com,
Jonathan Corbet <corbet@....net>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>,
hpa@...or.com,
x86@...nel.org,
kvm@...r.kernel.org,
linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org,
ahmedsoliman0x666@...il.com,
ovich00@...il.com,
kernel-hardening@...ts.openwall.com,
nigel.edwards@....com,
Boris Lukashev <blukashev@...pervictus.com>,
Igor Stoppa <igor.stoppa@...il.com>
Cc: Ahmed Abd El Mawgood <ahmedsoliman@...a.vt.edu>
Subject: [PATCH V8 08/11] KVM: X86: Port ROE_MPROTECT_CHUNK to x86
Apply d->memslot->partial_roe_bitmap to shadow page table entries
too.
Signed-off-by: Ahmed Abd El Mawgood <ahmedsoliman@...a.vt.edu>
---
arch/x86/kvm/roe.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/roe.c b/arch/x86/kvm/roe.c
index f787106be8..700f69823b 100644
--- a/arch/x86/kvm/roe.c
+++ b/arch/x86/kvm/roe.c
@@ -25,11 +25,14 @@ static bool __rmap_write_protect_roe(struct kvm *kvm,
struct rmap_iterator iter;
bool prot;
bool flush = false;
+ void *full_bmp = memslot->roe_bitmap;
+ void *part_bmp = memslot->partial_roe_bitmap;
for_each_rmap_spte(rmap_head, &iter, sptep) {
int idx = spte_to_gfn(sptep) - memslot->base_gfn;
- prot = !test_bit(idx, memslot->roe_bitmap) && pt_protect;
+ prot = !(test_bit(idx, full_bmp) || test_bit(idx, part_bmp));
+ prot = prot && pt_protect;
flush |= spte_write_protect(sptep, prot);
}
return flush;
--
2.19.2
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