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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 v5 02/23] KVM: PPC: BOOK3S: PR: Ignore UAMOR SPR
Date: Thu, 27 Aug 2020 09:39:10 +0530	[thread overview]
Message-ID: <20200827040931.297759-3-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20200827040931.297759-1-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;
-- 
2.26.2


  parent reply	other threads:[~2020-08-27  4:15 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-27  4:09 [PATCH v5 00/23] Kernel userspace access/execution prevention with hash translation Aneesh Kumar K.V
2020-08-27  4:09 ` [PATCH v5 01/23] powerpc: Add new macro to handle NESTED_IFCLR Aneesh Kumar K.V
2020-08-27  4:09 ` Aneesh Kumar K.V [this message]
2020-08-27  4:09 ` [PATCH v5 03/23] powerpc/book3s64/kuap/kuep: Make KUAP and KUEP a subfeature of PPC_MEM_KEYS Aneesh Kumar K.V
2020-08-27  4:09 ` [PATCH v5 04/23] powerpc/book3s64/kuap/kuep: Move uamor setup to pkey init Aneesh Kumar K.V
2020-08-27  4:09 ` [PATCH v5 05/23] powerpc/book3s64/kuap: Move KUAP related function outside radix Aneesh Kumar K.V
2020-08-27  4:09 ` [PATCH v5 06/23] powerpc/book3s64/kup: Use the correct #ifdef when including headers Aneesh Kumar K.V
2020-08-27  4:09 ` [PATCH v5 07/23] powerpc/book3s64/kuep: Move KUEP related function outside radix Aneesh Kumar K.V
2020-08-27  4:09 ` [PATCH v5 08/23] powerpc/book3s64/kuap: Rename MMU_FTR_RADIX_KUAP to MMU_FTR_KUAP Aneesh Kumar K.V
2020-08-27  4:57   ` Christophe Leroy
2020-08-27  4:09 ` [PATCH v5 09/23] powerpc/book3s64/kuap: Use Key 3 for kernel mapping with hash translation Aneesh Kumar K.V
2020-10-18  3:46   ` Sandipan Das
2020-08-27  4:09 ` [PATCH v5 10/23] powerpc/exec: Set thread.regs early during exec Aneesh Kumar K.V
2020-08-27  4:09 ` [PATCH v5 11/23] powerpc/book3s64/pkeys: Store/restore userspace AMR/IAMR correctly on entry and exit from kernel Aneesh Kumar K.V
2020-10-18  3:49   ` Sandipan Das
2020-08-27  4:09 ` [PATCH v5 12/23] powerpc/book3s64/pkeys: Inherit correctly on fork Aneesh Kumar K.V
2020-10-18  3:50   ` Sandipan Das
2020-08-27  4:09 ` [PATCH v5 13/23] powerpc/book3s64/pkeys: Reset userspace AMR correctly on exec Aneesh Kumar K.V
2020-10-18  3:50   ` Sandipan Das
2020-08-27  4:09 ` [PATCH v5 14/23] powerpc/ptrace-view: Use pt_regs values instead of thread_struct based one Aneesh Kumar K.V
2020-08-27  4:09 ` [PATCH v5 15/23] powerpc/book3s64/pkeys: Don't update SPRN_AMR when in kernel mode Aneesh Kumar K.V
2020-10-18  3:52   ` Sandipan Das
2020-08-27  4:09 ` [PATCH v5 16/23] powerpc/book3s64/kuap: Restrict access to userspace based on userspace AMR Aneesh Kumar K.V
2020-10-18  4:00   ` Sandipan Das
2020-08-27  4:09 ` [PATCH v5 17/23] powerpc/book3s64/kuap: Improve error reporting with KUAP Aneesh Kumar K.V
2020-08-27  4:09 ` [PATCH v5 18/23] powerpc/book3s64/kuap: Use Key 3 to implement KUAP with hash translation Aneesh Kumar K.V
2020-10-18  4:00   ` Sandipan Das
2020-08-27  4:09 ` [PATCH v5 19/23] powerpc/book3s64/kuep: Use Key 3 to implement KUEP " Aneesh Kumar K.V
2020-10-18  4:01   ` Sandipan Das
2020-08-27  4:09 ` [PATCH v5 20/23] powerpc/book3s64/hash/kuap: Enable kuap on hash Aneesh Kumar K.V
2020-09-12 11:54   ` Michael Ellerman
2020-10-18  4:02   ` Sandipan Das
2020-08-27  4:09 ` [PATCH v5 21/23] powerpc/book3s64/hash/kuep: Enable KUEP " Aneesh Kumar K.V
2020-10-18  4:03   ` Sandipan Das
2020-08-27  4:09 ` [PATCH v5 22/23] powerpc/book3s64/hash/kup: Don't hardcode kup key Aneesh Kumar K.V
2020-08-27  4:09 ` [PATCH v5 23/23] powerpc/book3s64/pkeys: Optimize FTR_KUAP and FTR_KUEP disabled case Aneesh Kumar K.V

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