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KVM: Allow cross page reads and writes from cached translations.

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This patch adds support for kvm_gfn_to_hva_cache_init functions for
reads and writes that will cross a page.  If the range falls within
the same memslot, then this will be a fast operation.  If the range
is split between two memslots, then the slower kvm_read_guest and
kvm_write_guest are used.

Tested: Test against kvm_clock unit tests.

Signed-off-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Andrew Honig
2013-03-29 09:35:21 -07:00
committed by Gleb Natapov
parent 09a6e1f4ad
commit 8f964525a1
5 changed files with 46 additions and 19 deletions
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2
arch/x86/kvm/lapic.c
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@@ -1857,7 +1857,7 @@ int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data)
if (!pv_eoi_enabled(vcpu))
return 0;
return kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.pv_eoi.data,
addr);
addr, sizeof(u8));
}
void kvm_lapic_init(void)