Marcelo Tosatti wrote:
Since the sync page path can collapse flushes.
Also only flush if the spte was writable before.
Signed-off-by: Marcelo Tosatti <[EMAIL PROTECTED]>
@@ -1241,9 +1239,12 @@ static void mmu_set_spte(struct kvm_vcpu
}
}
if (set_spte(vcpu, shadow_pte, pte_access, user_fault, write_fault,
- dirty, largepage, gfn, pfn, speculative))
+ dirty, largepage, gfn, pfn, speculative)) {
if (write_fault)
*ptwrite = 1;
+ if (was_writeble)
+ kvm_x86_ops->tlb_flush(vcpu);
+ }
I think we had cases where the spte.pfn contents changed, for example
when a large page was replaced by a normal page, and also:
} else if (pfn != spte_to_pfn(*shadow_pte)) {
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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