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[PATCH 22/33] KVM: MMU: Ensure freed shadow pages are clean

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From: Avi Kivity
Subject: [PATCH 22/33] KVM: MMU: Ensure freed shadow pages are clean
Date: Thursday, January 4, 2007 - 9:11 am

Signed-off-by: Avi Kivity <avi@qumranet.com>

Index: linux-2.6/drivers/kvm/mmu.c
===================================================================
--- linux-2.6.orig/drivers/kvm/mmu.c
+++ linux-2.6/drivers/kvm/mmu.c
@@ -318,6 +318,7 @@ static void kvm_mmu_free_page(struct kvm
 {
 	struct kvm_mmu_page *page_head = page_header(page_hpa);
 
+	ASSERT(is_empty_shadow_page(page_hpa));
 	list_del(&page_head->link);
 	page_head->page_hpa = page_hpa;
 	list_add(&page_head->link, &vcpu->free_pages);
-
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Messages in current thread:
[PATCH 0/33] KVM: MMU: Cache shadow page tables, Avi Kivity, (Thu Jan 4, 8:48 am)
[PATCH 1/33] KVM: MMU: Implement simple reverse mapping, Avi Kivity, (Thu Jan 4, 8:50 am)
[PATCH 2/33] KVM: MMU: Teach the page table walker to trac ..., Avi Kivity, (Thu Jan 4, 8:51 am)
[PATCH 3/33] KVM: MMU: Load the pae pdptrs on cr3 change l ..., Avi Kivity, (Thu Jan 4, 8:52 am)
[PATCH 4/33] KVM: MMU: Fold fetch_guest() into init_walker(), Avi Kivity, (Thu Jan 4, 8:53 am)
[PATCH 5/33] KVM: MU: Special treatment for shadow pae roo ..., Avi Kivity, (Thu Jan 4, 8:54 am)
[PATCH 6/33] KVM: MMU: Use the guest pdptrs instead of map ..., Avi Kivity, (Thu Jan 4, 8:55 am)
[PATCH 7/33] KVM: MMU: Make the shadow page tables also sp ..., Avi Kivity, (Thu Jan 4, 8:56 am)
[PATCH 8/33] KVM: MMU: Make kvm_mmu_alloc_page() return a ..., Avi Kivity, (Thu Jan 4, 8:57 am)
[PATCH 9/33] KVM: MMU: Shadow page table caching, Avi Kivity, (Thu Jan 4, 8:58 am)
[PATCH 10/33] KVM: MMU: Write protect guest pages when a s ..., Avi Kivity, (Thu Jan 4, 8:59 am)
[PATCH 11/33] KVM: MMU: Let the walker extract the target ..., Avi Kivity, (Thu Jan 4, 9:00 am)
[PATCH 12/33] KVM: MMU: Support emulated writes into RAM, Avi Kivity, (Thu Jan 4, 9:01 am)
[PATCH 13/33] KVM: MMU: Zap shadow page table entries on w ..., Avi Kivity, (Thu Jan 4, 9:02 am)
[PATCH 14/33] KVM: MMU: If emulating an instruction fails, ..., Avi Kivity, (Thu Jan 4, 9:03 am)
[PATCH 15/33] KVM: MMU: Implement child shadow unlinking, Avi Kivity, (Thu Jan 4, 9:04 am)
[PATCH 16/33] KVM: MMU: kvm_mmu_put_page() only removes on ..., Avi Kivity, (Thu Jan 4, 9:05 am)
[PATCH 17/33] KVM: MMU: oom handling, Avi Kivity, (Thu Jan 4, 9:06 am)
[PATCH 18/33] KVM: MMU: Remove invlpg interception, Avi Kivity, (Thu Jan 4, 9:07 am)
[PATCH 19/33] KVM: MMU: Remove release_pt_page_64(), Avi Kivity, (Thu Jan 4, 9:08 am)
[PATCH 20/33] KVM: MMU: Handle misaligned accesses to writ ..., Avi Kivity, (Thu Jan 4, 9:09 am)
[PATCH 21/33] KVM: MMU: &lt;ove is_empty_shadow_page() above ..., Avi Kivity, (Thu Jan 4, 9:10 am)
[PATCH 22/33] KVM: MMU: Ensure freed shadow pages are clean, Avi Kivity, (Thu Jan 4, 9:11 am)
[PATCH 23/33] KVM: MMU: If an empty shadow page is not emp ..., Avi Kivity, (Thu Jan 4, 9:12 am)
[PATCH 24/33] KVM: MMU: Page table write flood protection, Avi Kivity, (Thu Jan 4, 9:13 am)
[PATCH 25/33] KVM: MMU: Never free a shadow page actively ..., Avi Kivity, (Thu Jan 4, 9:14 am)
[PATCH 26/33] KVM: MMU: Fix cmpxchg8b emulation, Avi Kivity, (Thu Jan 4, 9:15 am)
[PATCH 27/33] KVM: MMU: Treat user-mode faults as a hint t ..., Avi Kivity, (Thu Jan 4, 9:16 am)
[PATCH 28/33] KVM: MMU: Free pages on kvm destruction, Avi Kivity, (Thu Jan 4, 9:17 am)
[PATCH 29/33] KVM: MMU: Replace atomic allocations by prea ..., Avi Kivity, (Thu Jan 4, 9:18 am)
[PATCH 30/33] KVM: MMU: Detect oom conditions and propagat ..., Avi Kivity, (Thu Jan 4, 9:19 am)
[PATCH 31/33] KVM: MMU: Flush guest tlb when reducing perm ..., Avi Kivity, (Thu Jan 4, 9:20 am)
[PATCH 32/33] KVM: MMU: Destroy mmu while we still have a ..., Avi Kivity, (Thu Jan 4, 9:21 am)
[PATCH 33/33] KVM: MMU: add audit code to check mappings, ..., Avi Kivity, (Thu Jan 4, 9:22 am)
Re: [PATCH 0/33] KVM: MMU: Cache shadow page tables, Andrew Morton, (Thu Jan 4, 10:22 am)
Re: [PATCH 0/33] KVM: MMU: Cache shadow page tables, Avi Kivity, (Thu Jan 4, 10:41 am)
Re: [PATCH 0/33] KVM: MMU: Cache shadow page tables, Ingo Molnar, (Thu Jan 4, 11:02 am)