KVM: PPC: Book3S HV P9: Test dawr_enabled() before saving host DAWR SPRs
Some of the DAWR SPR access is already predicated on dawr_enabled(), apply this to the remainder of the accesses. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211123095231.1036501-41-npiggin@gmail.com
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@ -666,13 +666,16 @@ int kvmhv_vcpu_entry_p9(struct kvm_vcpu *vcpu, u64 time_limit, unsigned long lpc
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host_hfscr = mfspr(SPRN_HFSCR);
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host_ciabr = mfspr(SPRN_CIABR);
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host_dawr0 = mfspr(SPRN_DAWR0);
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host_dawrx0 = mfspr(SPRN_DAWRX0);
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host_psscr = mfspr(SPRN_PSSCR);
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host_pidr = mfspr(SPRN_PID);
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if (cpu_has_feature(CPU_FTR_DAWR1)) {
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host_dawr1 = mfspr(SPRN_DAWR1);
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host_dawrx1 = mfspr(SPRN_DAWRX1);
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if (dawr_enabled()) {
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host_dawr0 = mfspr(SPRN_DAWR0);
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host_dawrx0 = mfspr(SPRN_DAWRX0);
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if (cpu_has_feature(CPU_FTR_DAWR1)) {
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host_dawr1 = mfspr(SPRN_DAWR1);
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host_dawrx1 = mfspr(SPRN_DAWRX1);
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}
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}
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local_paca->kvm_hstate.host_purr = mfspr(SPRN_PURR);
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@ -1006,15 +1009,18 @@ tm_return_to_guest:
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mtspr(SPRN_HFSCR, host_hfscr);
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if (vcpu->arch.ciabr != host_ciabr)
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mtspr(SPRN_CIABR, host_ciabr);
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if (vcpu->arch.dawr0 != host_dawr0)
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mtspr(SPRN_DAWR0, host_dawr0);
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if (vcpu->arch.dawrx0 != host_dawrx0)
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mtspr(SPRN_DAWRX0, host_dawrx0);
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if (cpu_has_feature(CPU_FTR_DAWR1)) {
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if (vcpu->arch.dawr1 != host_dawr1)
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mtspr(SPRN_DAWR1, host_dawr1);
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if (vcpu->arch.dawrx1 != host_dawrx1)
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mtspr(SPRN_DAWRX1, host_dawrx1);
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if (dawr_enabled()) {
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if (vcpu->arch.dawr0 != host_dawr0)
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mtspr(SPRN_DAWR0, host_dawr0);
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if (vcpu->arch.dawrx0 != host_dawrx0)
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mtspr(SPRN_DAWRX0, host_dawrx0);
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if (cpu_has_feature(CPU_FTR_DAWR1)) {
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if (vcpu->arch.dawr1 != host_dawr1)
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mtspr(SPRN_DAWR1, host_dawr1);
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if (vcpu->arch.dawrx1 != host_dawrx1)
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mtspr(SPRN_DAWRX1, host_dawrx1);
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}
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}
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if (vc->dpdes)
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