[Xen-changelog] [xen-unstable] x86: Add TLB flushing to HAP p2m changes

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1224517765 -3600
# Node ID f4dab783b58b41f2c67a66d6d095887faec3c296
# Parent  c003e5a23a4e1afe35f1b547575fcc7734bf5ea6
x86: Add TLB flushing to HAP p2m changes

Removing an MFN from the p2m requires it to be flushed from the
guest's TLBs on HAP, like we do when we're using shadows.

Signed-off-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
---
 xen/arch/x86/mm/hap/hap.c |    7 +++++++
 1 files changed, 7 insertions(+)

diff -r c003e5a23a4e -r f4dab783b58b xen/arch/x86/mm/hap/hap.c
--- a/xen/arch/x86/mm/hap/hap.c Mon Oct 20 16:48:17 2008 +0100
+++ b/xen/arch/x86/mm/hap/hap.c Mon Oct 20 16:49:25 2008 +0100
@@ -639,9 +639,16 @@ hap_write_p2m_entry(struct vcpu *v, unsi
 hap_write_p2m_entry(struct vcpu *v, unsigned long gfn, l1_pgentry_t *p,
                     mfn_t table_mfn, l1_pgentry_t new, unsigned int level)
 {
+    uint32_t old_flags;
+
     hap_lock(v->domain);
 
+    old_flags = l1e_get_flags(*p);
     safe_write_pte(p, new);
+    if ( (old_flags & _PAGE_PRESENT)
+         && (level == 1 || (level == 2 && (old_flags & _PAGE_PSE))) )
+             flush_tlb_mask(v->domain->domain_dirty_cpumask);
+
 #if CONFIG_PAGING_LEVELS == 3
     /* install P2M in monitor table for PAE Xen */
     if ( level == 3 )

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