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DISCONTINUED:openSUSE:11.1:Update
xen
20628-x86-WP=0-emulation.patch
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File 20628-x86-WP=0-emulation.patch of Package xen
# HG changeset patch # User Keir Fraser <keir.fraser@citrix.com> # Date 1260777142 0 # Node ID 3d505c9f1b7344e2debe4f1a905c6d42a179b93d # Parent c61953922215ecde526468d5a2ebe5147eee7529 hvm: Fix CR0.WP=0 emulation. Don't take write emulation path for MMIO. Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com> --- a/xen/arch/x86/mm/shadow/common.c +++ b/xen/arch/x86/mm/shadow/common.c @@ -2656,6 +2656,7 @@ void sh_remove_shadows(struct vcpu *v, m }; ASSERT(!(all && fast)); + ASSERT(mfn_valid(gmfn)); /* Although this is an externally visible function, we do not know * whether the shadow lock will be held when it is called (since it --- a/xen/arch/x86/mm/shadow/multi.c +++ b/xen/arch/x86/mm/shadow/multi.c @@ -3420,7 +3420,8 @@ static int sh_page_fault(struct vcpu *v, * fault was a non-user write to a present page. */ if ( is_hvm_domain(d) && unlikely(!hvm_wp_enabled(v)) - && regs->error_code == (PFEC_write_access|PFEC_page_present) ) + && regs->error_code == (PFEC_write_access|PFEC_page_present) + && mfn_valid(gmfn) ) { perfc_incr(shadow_fault_emulate_wp); goto emulate;
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