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[V8,08/11] KVM: X86: Port ROE_MPROTECT_CHUNK to x86

Message ID 20190106192345.13578-9-ahmedsoliman@mena.vt.edu (mailing list archive)
State New, archived
Headers show
Series [V8,01/11] KVM: State whether memory should be freed in kvm_free_memslot | expand

Commit Message

Ahmed Abd El Mawgood Jan. 6, 2019, 7:23 p.m. UTC 
Apply d->memslot->partial_roe_bitmap to shadow page table entries
too.

Signed-off-by: Ahmed Abd El Mawgood <ahmedsoliman@mena.vt.edu>
---
 arch/x86/kvm/roe.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

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;