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-rw-r--r--arch/powerpc/kvm/book3s_hv_interrupts.S12
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_interrupts.S b/arch/powerpc/kvm/book3s_hv_interrupts.S
index 0fdc4a28970b..404deb512844 100644
--- a/arch/powerpc/kvm/book3s_hv_interrupts.S
+++ b/arch/powerpc/kvm/book3s_hv_interrupts.S
@@ -121,10 +121,20 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
* Put whatever is in the decrementer into the
* hypervisor decrementer.
*/
+BEGIN_FTR_SECTION
+ ld r5, HSTATE_KVM_VCORE(r13)
+ ld r6, VCORE_KVM(r5)
+ ld r9, KVM_HOST_LPCR(r6)
+ andis. r9, r9, LPCR_LD@h
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
mfspr r8,SPRN_DEC
mftb r7
- mtspr SPRN_HDEC,r8
+BEGIN_FTR_SECTION
+ /* On POWER9, don't sign-extend if host LPCR[LD] bit is set */
+ bne 32f
+END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
extsw r8,r8
+32: mtspr SPRN_HDEC,r8
add r8,r8,r7
std r8,HSTATE_DECEXP(r13)