[PATCH v3] powerpc: kvm: make _PAGE_NUMA take effect

Liu Ping Fan pingfank at linux.vnet.ibm.com
Fri Apr 11 21:45:07 EST 2014

When we mark pte with _PAGE_NUMA we already call mmu_notifier_invalidate_range_start
and mmu_notifier_invalidate_range_end, which will mark existing guest hpte
entry as HPTE_V_ABSENT. Now we need to do that when we are inserting new
guest hpte entries.

Signed-off-by: Liu Ping Fan <pingfank at linux.vnet.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>
  rebased onto Alex's tree, branch kvm-ppc-next
  substitue commit log with the more clear description in Aneesh's reply (thanks, Aneesh)
 arch/powerpc/kvm/book3s_hv_rm_mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index 1d6c56a..1117525 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -234,7 +234,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 		pte_size = psize;
 		pte = lookup_linux_pte_and_update(pgdir, hva, writing,
-		if (pte_present(pte)) {
+		if (pte_present(pte)&&!pte_numa(pte)) {
 			if (writing && !pte_write(pte))
 				/* make the actual HPTE be read-only */
 				ptel = hpte_make_readonly(ptel);

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