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authorPaul Mackerras <paulus@samba.org>2013-09-21 09:53:28 +1000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-18 07:45:44 -0700
commit40ee05de350259890492ceb4f23017470c553217 (patch)
tree8cf218b6e8712e124d7d39af4da5f9959dd47d14 /arch/powerpc
parentcec073e269a8e8ee653ada869b96c59e8286a606 (diff)
downloadlinaro-lsk-40ee05de350259890492ceb4f23017470c553217.tar.gz
KVM: PPC: Book3S HV: Fix typo in saving DSCR
commit cfc860253abd73e1681696c08ea268d33285a2c4 upstream. This fixes a typo in the code that saves the guest DSCR (Data Stream Control Register) into the kvm_vcpu_arch struct on guest exit. The effect of the typo was that the DSCR value was saved in the wrong place, so changes to the DSCR by the guest didn't persist across guest exit and entry, and some host kernel memory got corrupted. Signed-off-by: Paul Mackerras <paulus@samba.org> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kvm/book3s_hv_rmhandlers.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index b02f91e4c70..7bcd4d6e177 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -1054,7 +1054,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)
BEGIN_FTR_SECTION
mfspr r8, SPRN_DSCR
ld r7, HSTATE_DSCR(r13)
- std r8, VCPU_DSCR(r7)
+ std r8, VCPU_DSCR(r9)
mtspr SPRN_DSCR, r7
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206)