linux-kernel - [PATCH 41/58] KVM: MMU: Remove cr0.wp tricks

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Message-Id: <11820734812517-git-send-email-avi@qumranet.com>
Date:	Sun, 17 Jun 2007 12:44:22 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	kvm-devel@...ts.sourceforge.net
Cc:	linux-kernel@...r.kernel.org, Avi Kivity <avi@...ranet.com>
Subject: [PATCH 41/58] KVM: MMU: Remove cr0.wp tricks

No longer needed as we do everything in one place.

Signed-off-by: Avi Kivity <avi@...ranet.com>
---
 drivers/kvm/paging_tmpl.h |   11 -----------
 1 files changed, 0 insertions(+), 11 deletions(-)

diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index fabc2c9..59b4cb2 100644
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -240,17 +240,6 @@ static void FNAME(set_pte_common)(struct kvm_vcpu *vcpu,
 
 	spte |= paddr;
 
-	if (!write_fault && (spte & PT_SHADOW_USER_MASK) &&
-	    !(spte & PT_USER_MASK)) {
-		/*
-		 * If supervisor write protect is disabled, we shadow kernel
-		 * pages as user pages so we can trap the write access.
-		 */
-		spte |= PT_USER_MASK;
-		spte &= ~PT_WRITABLE_MASK;
-		access_bits &= ~PT_WRITABLE_MASK;
-	}
-
 	if ((access_bits & PT_WRITABLE_MASK)
 	    || (write_fault && !is_write_protection(vcpu) && !user_fault)) {
 		struct kvm_mmu_page *shadow;
-- 
1.5.0.6

-
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