On Mon Jun 3, 2024 at 9:14 PM AEST, Shivaprasad G Bhat wrote:
> The nestedv2 APIs has the guest state element defined for DEXCR
> for the save-restore with L0. However, its ignored in the code.
>
> The patch takes care of this for the DEXCR GSID.
>
> Signed-off-by: Shivaprasad G Bhat <sb...@linux.ibm.com>
> ---
> arch/powerpc/include/asm/kvm_host.h | 1 +
> arch/powerpc/kvm/book3s_hv.h | 1 +
> arch/powerpc/kvm/book3s_hv_nestedv2.c | 6 ++++++
> 3 files changed, 8 insertions(+)
>
> diff --git a/arch/powerpc/include/asm/kvm_host.h
> b/arch/powerpc/include/asm/kvm_host.h
> index 8abac532146e..1e2fdcbecffd 100644
> --- a/arch/powerpc/include/asm/kvm_host.h
> +++ b/arch/powerpc/include/asm/kvm_host.h
> @@ -599,6 +599,7 @@ struct kvm_vcpu_arch {
> ulong dawrx0;
> ulong dawr1;
> ulong dawrx1;
> + ulong dexcr;
> ulong ciabr;
> ulong cfar;
> ulong ppr;
Actually I would reorder the patches so you introduce the KVM reg
first, and put this hunk there.
The nested v2 bits look okay. For them,
Reviewed-by: Nicholas Piggin <npig...@gmail.com>
> diff --git a/arch/powerpc/kvm/book3s_hv.h b/arch/powerpc/kvm/book3s_hv.h
> index 47b2c815641e..7b0fd282fe95 100644
> --- a/arch/powerpc/kvm/book3s_hv.h
> +++ b/arch/powerpc/kvm/book3s_hv.h
> @@ -116,6 +116,7 @@ KVMPPC_BOOK3S_HV_VCPU_ACCESSOR(dawr0, 64,
> KVMPPC_GSID_DAWR0)
> 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(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)
> diff --git a/arch/powerpc/kvm/book3s_hv_nestedv2.c
> b/arch/powerpc/kvm/book3s_hv_nestedv2.c
> index 1091f7a83b25..d207a6d936ff 100644
> --- a/arch/powerpc/kvm/book3s_hv_nestedv2.c
> +++ b/arch/powerpc/kvm/book3s_hv_nestedv2.c
> @@ -193,6 +193,9 @@ static int gs_msg_ops_vcpu_fill_info(struct
> kvmppc_gs_buff *gsb,
> case KVMPPC_GSID_DAWRX1:
> rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.dawrx1);
> break;
> + case KVMPPC_GSID_DEXCR:
> + rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dexcr);
> + break;
> case KVMPPC_GSID_CIABR:
> rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ciabr);
> break;
> @@ -441,6 +444,9 @@ static int gs_msg_ops_vcpu_refresh_info(struct
> kvmppc_gs_msg *gsm,
> case KVMPPC_GSID_DAWRX1:
> vcpu->arch.dawrx1 = kvmppc_gse_get_u32(gse);
> break;
> + case KVMPPC_GSID_DEXCR:
> + vcpu->arch.dexcr = kvmppc_gse_get_u64(gse);
> + break;
> case KVMPPC_GSID_CIABR:
> vcpu->arch.ciabr = kvmppc_gse_get_u64(gse);
> break;
