Dong, Eddie wrote:
> host side TLB flush can be merged together if multiple
> spte need to be write-protected.
>
> Signed-off-by: Yaozu (Eddie) Dong <[EMAIL PROTECTED]>
>
> diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
> index 92ac0d1..749db46 100644
> --- a/drivers/kvm/mmu.c
> +++ b/drivers/kvm/mmu.c
> @@ -524,9 +524,9 @@ static void rmap_write_protect(struct kvm *kvm, u64
> gfn)
> rmap_printk("rmap_write_protect: spte %p %llx\n", spte,
> *spte);
> if (is_writeble_pte(*spte))
> set_shadow_pte(spte, *spte & ~PT_WRITABLE_MASK);
> - kvm_flush_remote_tlbs(kvm);
> spte = rmap_next(kvm, rmapp, spte);
> }
> + kvm_flush_remote_tlbs(kvm);
> }
>
I think this can be improved; in case we don't touch the shadow pte at
all, there is no need to flush the tlbs.
Also, please pull from kvm.git; things have moved around (mmu.c is now
in arch/x86/kvm/).
--
Any sufficiently difficult bug is indistinguishable from a feature.
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