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 <c...@fr.ibm.com>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Alexey Kardashevskiy <a...@ozlabs.ru>
Cc: Gregory Kurz <gk...@linux.vnet.ibm.com>
---
Tested on 3.18-rc5 with LE and BE host.
v2: add be64 local variables to be friendly with sparse
arch/powerpc/kvm/book3s_64_mmu_hv.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
Index: linux-3.18-hv.git/arch/powerpc/kvm/book3s_64_mmu_hv.c
===================================================================
--- linux-3.18-hv.git.orig/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ linux-3.18-hv.git/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -1539,9 +1539,15 @@ static ssize_t kvm_htab_write(struct fil
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;
--
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