diff mbox

[PULL,07/18] KVM: PPC: Book3S HV: ptes are big endian

Message ID 1418863621-6630-8-git-send-email-agraf@suse.de (mailing list archive)
State New, archived
Headers show

Commit Message

Alexander Graf Dec. 18, 2014, 12:46 a.m. UTC 
From: Cédric Le Goater <clg@fr.ibm.com>

When being restored from qemu, the kvm_get_htab_header are in native
endian, but the ptes are big endian.

This patch fixes restore on a KVM LE host. Qemu also needs a fix for
this :

     http://lists.nongnu.org/archive/html/qemu-ppc/2014-11/msg00008.html

Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 arch/powerpc/kvm/book3s_64_mmu_hv.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 41f96c5..59425f1 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -1542,9 +1542,15 @@  static ssize_t kvm_htab_write(struct file *file, const char __user *buf,
 		hptp = (__be64 *)(kvm->arch.hpt_virt + (i * HPTE_SIZE));
 		lbuf = (unsigned long __user *)buf;
 		for (j = 0; j < hdr.n_valid; ++j) {
+			__be64 hpte_v;
+			__be64 hpte_r;
+
 			err = -EFAULT;
-			if (__get_user(v, lbuf) || __get_user(r, lbuf + 1))
+			if (__get_user(hpte_v, lbuf) ||
+			    __get_user(hpte_r, lbuf + 1))
 				goto out;
+			v = be64_to_cpu(hpte_v);
+			r = be64_to_cpu(hpte_r);
 			err = -EINVAL;
 			if (!(v & HPTE_V_VALID))
 				goto out;