[PATCH v2] powernv: kvm: make _PAGE_NUMA take effect

Liu Ping Fan kernelfans at gmail.com
Tue Jan 21 19:15:29 EST 2014

To make sure that on host, the pages marked with _PAGE_NUMA result in a fault
when guest access them, we should force the checking when guest uses hypercall
to setup hpte.

Signed-off-by: Liu Ping Fan <pingfank at linux.vnet.ibm.com>
  It should be the reply to "[PATCH 2/4] powernv: kvm: make _PAGE_NUMA take effect"
  And I imporve the changelog according to Aneesh's suggestion.
 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 9c51544..af8602d 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -232,7 +232,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 		/* Look up the Linux PTE for the backing page */
 		pte_size = psize;
 		pte = lookup_linux_pte(pgdir, hva, writing, &pte_size);
-		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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