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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: [PATCH v7 02/22] KVM: PPC: BOOK3S: PR: Ignore UAMOR SPR
Date: Fri, 27 Nov 2020 10:14:04 +0530	[thread overview]
Message-ID: <20201127044424.40686-3-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20201127044424.40686-1-aneesh.kumar@linux.ibm.com>

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 <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 0effd48c8f4d..b08cc15f31c7 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;
-- 
2.28.0


  parent reply	other threads:[~2020-11-27  4:50 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-27  4:44 [PATCH v7 00/22] Kernel userspace access/execution prevention with hash translation Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 01/22] powerpc: Add new macro to handle NESTED_IFCLR Aneesh Kumar K.V
2020-11-27  4:44 ` Aneesh Kumar K.V [this message]
2020-11-27  4:44 ` [PATCH v7 03/22] powerpc/book3s64/kuap/kuep: Add PPC_PKEY config on book3s64 Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 04/22] powerpc/book3s64/kuap/kuep: Move uamor setup to pkey init Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 05/22] powerpc/book3s64/kuap: Move KUAP related function outside radix Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 06/22] powerpc/book3s64/kuep: Move KUEP " Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 07/22] powerpc/book3s64/kuap: Rename MMU_FTR_RADIX_KUAP and MMU_FTR_KUEP Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 08/22] powerpc/book3s64/kuap: Use Key 3 for kernel mapping with hash translation Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 09/22] powerpc/exec: Set thread.regs early during exec Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 10/22] powerpc/book3s64/pkeys: Store/restore userspace AMR/IAMR correctly on entry and exit from kernel Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 11/22] powerpc/book3s64/pkeys: Inherit correctly on fork Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 12/22] powerpc/book3s64/pkeys: Reset userspace AMR correctly on exec Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 13/22] powerpc/ptrace-view: Use pt_regs values instead of thread_struct based one Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 14/22] powerpc/book3s64/pkeys: Don't update SPRN_AMR when in kernel mode Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 15/22] powerpc/book3s64/kuap: Restrict access to userspace based on userspace AMR Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 16/22] powerpc/book3s64/kuap: Improve error reporting with KUAP Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 17/22] powerpc/book3s64/kuap: Use Key 3 to implement KUAP with hash translation Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 18/22] powerpc/book3s64/kuep: Use Key 3 to implement KUEP " Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 19/22] powerpc/book3s64/hash/kuap: Enable kuap on hash Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 20/22] powerpc/book3s64/hash/kuep: Enable KUEP " Aneesh Kumar K.V
2020-11-27  4:44 ` [PATCH v7 21/22] powerpc/book3s64/hash/kup: Don't hardcode kup key Aneesh Kumar K.V
2020-12-02  4:38   ` [PATCH v7 updated 21/22 ] powerpc/book3s64/kup: Check max key supported before enabling kup Aneesh Kumar K.V
2020-12-15 11:19     ` Michael Ellerman
2020-11-27  4:44 ` [PATCH v7 22/22] powerpc/book3s64/pkeys: Optimize KUAP and KUEP feature disabled case Aneesh Kumar K.V
2020-12-01  3:41 ` [PATCH v7 00/22] Kernel userspace access/execution prevention with hash translation Aneesh Kumar K.V
2020-12-10 11:29 ` Michael Ellerman

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