[PATCH v3 06/29] KVM: PPC: Book3S PR: turn on FP/VSX/VMX MSR bits in kvmppc_save_tm()

wei.guo.simon at gmail.com wei.guo.simon at gmail.com
Mon May 21 14:09:23 AEST 2018

From: Simon Guo <wei.guo.simon at gmail.com>

kvmppc_save_tm() invokes  store_fp_state/store_vr_state(). So it is
mandatory to turn on FP/VSX/VMX MSR bits for its execution, just
like what kvmppc_restore_tm() did.

Previsouly HV KVM has turned the bits on outside of function
kvmppc_save_tm().  Now we include this bit change in kvmppc_save_tm()
so that the logic is more clean. And PR KVM can reuse it later.

Signed-off-by: Simon Guo <wei.guo.simon at gmail.com>
Reviewed-by: Paul Mackerras <paulus at ozlabs.org>
 arch/powerpc/kvm/tm.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/kvm/tm.S b/arch/powerpc/kvm/tm.S
index cbe608a..b7057d5 100644
--- a/arch/powerpc/kvm/tm.S
+++ b/arch/powerpc/kvm/tm.S
@@ -42,6 +42,8 @@ _GLOBAL(kvmppc_save_tm)
 	mfmsr	r8
 	li	r0, 1
 	rldimi	r8, r0, MSR_TM_LG, 63-MSR_TM_LG
+	ori     r8, r8, MSR_FP
+	oris    r8, r8, (MSR_VEC | MSR_VSX)@h
 	mtmsrd	r8
 	rldicl. r4, r4, 64 - MSR_TS_S_LG, 62

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