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authorAvi Kivity <avi@qumranet.com>2007-12-30 12:29:05 +0200
committerAvi Kivity <avi@qumranet.com>2008-01-30 18:01:21 +0200
commitd7824fff896a1698a07a8046dc362f4500c302f7 (patch)
tree249e23ec224bc621bea1ef24fa83f5a749d6b35b /include/asm-x86
parent7ec54588210df29ea637e6054489bc942c0ef371 (diff)
KVM: MMU: Avoid calling gfn_to_page() in mmu_set_spte()
Since gfn_to_page() is a sleeping function, and we want to make the core mmu spinlocked, we need to pass the page from the walker context (which can sleep) to the shadow context (which cannot). [marcelo: avoid recursive locking of mmap_sem] Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/asm-x86')
-rw-r--r--include/asm-x86/kvm_host.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index 44b89259f6c..20597bc1674 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -224,6 +224,11 @@ struct kvm_vcpu_arch {
int last_pt_write_count;
u64 *last_pte_updated;
+ struct {
+ gfn_t gfn; /* presumed gfn during guest pte update */
+ struct page *page; /* page corresponding to that gfn */
+ } update_pte;
+
struct i387_fxsave_struct host_fx_image;
struct i387_fxsave_struct guest_fx_image;