unimore/kernel-hacking-2024-linux-steffo
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KVM: PPC: Book3S HV: Add one-reg interface for HASHKEYR register

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The patch adds a one-reg register identifier which can be used to
read and set the virtual HASHKEYR for the guest during enter/exit
with KVM_REG_PPC_HASHKEYR. The specific SPR KVM API documentation
too updated.

Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/171759283170.1480.12904332463112769129.stgit@linux.ibm.com
This commit is contained in:
Shivaprasad G Bhat 2024-06-05 13:07:15 +00:00 committed by Michael Ellerman
parent 2d6be3ca32
commit e9eb790b25
5 changed files with 10 additions and 0 deletions
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1
Documentation/virt/kvm/api.rst
View file

@ -2439,6 +2439,7 @@ registers, find a list below:
PPC KVM_REG_PPC_PSSCR 64
PPC KVM_REG_PPC_DEC_EXPIRY 64
PPC KVM_REG_PPC_PTCR 64
PPC KVM_REG_PPC_HASHKEYR 64
PPC KVM_REG_PPC_DAWR1 64
PPC KVM_REG_PPC_DAWRX1 64
PPC KVM_REG_PPC_DEXCR 64

1
arch/powerpc/include/asm/kvm_host.h
View file

@ -600,6 +600,7 @@ struct kvm_vcpu_arch {
ulong dawr1;
ulong dawrx1;
ulong dexcr;
ulong hashkeyr;
ulong ciabr;
ulong cfar;
ulong ppr;

1
arch/powerpc/include/uapi/asm/kvm.h
View file

@ -646,6 +646,7 @@ struct kvm_ppc_cpu_char {
#define KVM_REG_PPC_DAWR1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc4)
#define KVM_REG_PPC_DAWRX1 (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc5)
#define KVM_REG_PPC_DEXCR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc6)
#define KVM_REG_PPC_HASHKEYR (KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xc7)
/* Transactional Memory checkpointed state:
* This is all GPRs, all VSX regs and a subset of SPRs

6
arch/powerpc/kvm/book3s_hv.c
View file

@ -2352,6 +2352,9 @@ static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
case KVM_REG_PPC_DEXCR:
*val = get_reg_val(id, kvmppc_get_dexcr_hv(vcpu));
break;
case KVM_REG_PPC_HASHKEYR:
*val = get_reg_val(id, kvmppc_get_hashkeyr_hv(vcpu));
break;
case KVM_REG_PPC_CIABR:
*val = get_reg_val(id, kvmppc_get_ciabr_hv(vcpu));
break;
@ -2598,6 +2601,9 @@ static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
case KVM_REG_PPC_DEXCR:
kvmppc_set_dexcr_hv(vcpu, set_reg_val(id, *val));
break;
case KVM_REG_PPC_HASHKEYR:
kvmppc_set_hashkeyr_hv(vcpu, set_reg_val(id, *val));
break;
case KVM_REG_PPC_CIABR:
kvmppc_set_ciabr_hv(vcpu, set_reg_val(id, *val));
/* Don't allow setting breakpoints in hypervisor code */

1
arch/powerpc/kvm/book3s_hv.h
View file

@ -117,6 +117,7 @@ KVMPPC_BOOK3S_HV_VCPU_ACCESSOR(dawr1, 64, KVMPPC_GSID_DAWR1)
KVMPPC_BOOK3S_HV_VCPU_ACCESSOR(dawrx0, 64, KVMPPC_GSID_DAWRX0)
KVMPPC_BOOK3S_HV_VCPU_ACCESSOR(dawrx1, 64, KVMPPC_GSID_DAWRX1)
KVMPPC_BOOK3S_HV_VCPU_ACCESSOR(dexcr, 64, KVMPPC_GSID_DEXCR)
KVMPPC_BOOK3S_HV_VCPU_ACCESSOR(hashkeyr, 64, KVMPPC_GSID_HASHKEYR)
KVMPPC_BOOK3S_HV_VCPU_ACCESSOR(ciabr, 64, KVMPPC_GSID_CIABR)
KVMPPC_BOOK3S_HV_VCPU_ACCESSOR(wort, 64, KVMPPC_GSID_WORT)
KVMPPC_BOOK3S_HV_VCPU_ACCESSOR(ppr, 64, KVMPPC_GSID_PPR)