From 9f378b9f007cc94beadea40df83cc62a76975c6f Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Fri, 27 Nov 2020 10:14:04 +0530 Subject: [PATCH] KVM: PPC: BOOK3S: PR: Ignore UAMOR SPR With power7 and above we expect the cpu to support keys. The number of keys are firmware controlled based on device tree. PR KVM do not expose key details via device tree. Hence when running with PR KVM we do run with MMU_FTR_KEY support disabled. But we can still get updates on UAMOR. Hence ignore access to them and for mfstpr return 0 indicating no AMR/IAMR update is no allowed. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201127044424.40686-3-aneesh.kumar@linux.ibm.com --- arch/powerpc/kvm/book3s_emulate.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c index 0effd48c8f4d1..b08cc15f31c7b 100644 --- a/arch/powerpc/kvm/book3s_emulate.c +++ b/arch/powerpc/kvm/book3s_emulate.c @@ -840,6 +840,9 @@ int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val) case SPRN_MMCR1: case SPRN_MMCR2: case SPRN_UMMCR2: + case SPRN_UAMOR: + case SPRN_IAMR: + case SPRN_AMR: #endif break; unprivileged: @@ -1004,6 +1007,9 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val case SPRN_MMCR2: case SPRN_UMMCR2: case SPRN_TIR: + case SPRN_UAMOR: + case SPRN_IAMR: + case SPRN_AMR: #endif *spr_val = 0; break; -- 2.30.2