From 365fb3fdf6769d3553999d8eb6cc2a8c56c747c1 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Sat, 28 Aug 2010 19:24:13 +0800 Subject: KVM: MMU: rewrite audit_mappings_page() function There is a bugs in this function, we call gfn_to_pfn() and kvm_mmu_gva_to_gpa_read() in atomic context(kvm_mmu_audit() is called under the spinlock(mmu_lock)'s protection). This patch fix it by: - introduce gfn_to_pfn_atomic instead of gfn_to_pfn - get the mapping gfn from kvm_mmu_page_get_gfn() And it adds 'notrap' ptes check in unsync/direct sps Signed-off-by: Xiao Guangrong Signed-off-by: Avi Kivity --- virt/kvm/kvm_main.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'virt/kvm') diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 2eb0b75..c7a57b4 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -999,7 +999,7 @@ pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr) } EXPORT_SYMBOL_GPL(hva_to_pfn_atomic); -pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) +static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic) { unsigned long addr; @@ -1009,7 +1009,18 @@ pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) return page_to_pfn(bad_page); } - return hva_to_pfn(kvm, addr, false); + return hva_to_pfn(kvm, addr, atomic); +} + +pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn) +{ + return __gfn_to_pfn(kvm, gfn, true); +} +EXPORT_SYMBOL_GPL(gfn_to_pfn_atomic); + +pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) +{ + return __gfn_to_pfn(kvm, gfn, false); } EXPORT_SYMBOL_GPL(gfn_to_pfn); -- cgit v1.1