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KVM: MMU: Avoid calling gfn_to_page() in mmu_set_spte()

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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 <[email protected]>
This commit is contained in:
Avi Kivity 2007-12-30 12:29:05 +02:00
commit d7824fff89
3 changed files with 73 additions and 10 deletions
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5
include/asm-x86/kvm_host.h
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@ -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;