system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-10-07 03:42:55 +00:00
Code Issues Packages Projects Releases Wiki Activity

KVM: PPC: BOOK3S: PR: Ignore UAMOR SPR

Browse source 
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>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-3-aneesh.kumar@linux.ibm.com
This commit is contained in:
Aneesh Kumar K.V 2020-11-27 10:14:04 +05:30 committed by Michael Ellerman
parent c3d35ddd1e
commit 9f378b9f00
1 changed files with 6 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
arch/powerpc/kvm/book3s_emulate.c
View file

@ -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;