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Commit cfc86025 authored by Paul Mackerras's avatar Paul Mackerras Committed by Paolo Bonzini
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KVM: PPC: Book3S HV: Fix typo in saving DSCR 



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.

Cc: stable@vger.kernel.org [v3.1+]
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
Acked-by: default avatarAlexander Graf <agraf@suse.de>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent d0d538b9

arch/powerpc/kvm/book3s_hv_rmhandlers.S

+1 −1
Original line number Diff line number Diff line
@@ -1066,7 +1066,7 @@ 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)