diff mbox series

[v5,04/16] RISC-V: KVM: Allow Zimop extension for Guest/VM

Message ID 20240517145302.971019-5-cleger@rivosinc.com (mailing list archive)
State New, archived
Headers show
Series Add support for a few Zc* extensions, Zcmop and Zimop | expand

Commit Message

Clément Léger May 17, 2024, 2:52 p.m. UTC 
Extend the KVM ISA extension ONE_REG interface to allow KVM user space
to detect and enable Zimop extension for Guest/VM.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
---
 arch/riscv/include/uapi/asm/kvm.h | 1 +
 arch/riscv/kvm/vcpu_onereg.c      | 2 ++
 2 files changed, 3 insertions(+)

Comments

Anup Patel May 17, 2024, 3:17 p.m. UTC | #1 
On Fri, May 17, 2024 at 8:23 PM Clément Léger <cleger@rivosinc.com> wrote:
>
> Extend the KVM ISA extension ONE_REG interface to allow KVM user space
> to detect and enable Zimop extension for Guest/VM.
>
> Signed-off-by: Clément Léger <cleger@rivosinc.com>

LGTM.

Reviewed-by: Anup Patel <anup@brainfault.org>
Acked-by: Anup Patel <anup@brainfault.org>

Regards,
Anup

> ---
>  arch/riscv/include/uapi/asm/kvm.h | 1 +
>  arch/riscv/kvm/vcpu_onereg.c      | 2 ++
>  2 files changed, 3 insertions(+)
>
> diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
> index b1c503c2959c..35a12aa1953e 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -167,6 +167,7 @@ enum KVM_RISCV_ISA_EXT_ID {
>         KVM_RISCV_ISA_EXT_ZFA,
>         KVM_RISCV_ISA_EXT_ZTSO,
>         KVM_RISCV_ISA_EXT_ZACAS,
> +       KVM_RISCV_ISA_EXT_ZIMOP,
>         KVM_RISCV_ISA_EXT_MAX,
>  };
>
> diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
> index f4a6124d25c9..c6ee763422f2 100644
> --- a/arch/riscv/kvm/vcpu_onereg.c
> +++ b/arch/riscv/kvm/vcpu_onereg.c
> @@ -60,6 +60,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
>         KVM_ISA_EXT_ARR(ZIHINTNTL),
>         KVM_ISA_EXT_ARR(ZIHINTPAUSE),
>         KVM_ISA_EXT_ARR(ZIHPM),
> +       KVM_ISA_EXT_ARR(ZIMOP),
>         KVM_ISA_EXT_ARR(ZKND),
>         KVM_ISA_EXT_ARR(ZKNE),
>         KVM_ISA_EXT_ARR(ZKNH),
> @@ -137,6 +138,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
>         case KVM_RISCV_ISA_EXT_ZIHINTNTL:
>         case KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
>         case KVM_RISCV_ISA_EXT_ZIHPM:
> +       case KVM_RISCV_ISA_EXT_ZIMOP:
>         case KVM_RISCV_ISA_EXT_ZKND:
>         case KVM_RISCV_ISA_EXT_ZKNE:
>         case KVM_RISCV_ISA_EXT_ZKNH:
> --
> 2.43.0
>
Charlie Jenkins May 29, 2024, 10:16 p.m. UTC | #2 
On Fri, May 17, 2024 at 04:52:44PM +0200, Clément Léger wrote:
> Extend the KVM ISA extension ONE_REG interface to allow KVM user space
> to detect and enable Zimop extension for Guest/VM.
> 
> Signed-off-by: Clément Léger <cleger@rivosinc.com>
> ---
>  arch/riscv/include/uapi/asm/kvm.h | 1 +
>  arch/riscv/kvm/vcpu_onereg.c      | 2 ++
>  2 files changed, 3 insertions(+)
> 
> diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
> index b1c503c2959c..35a12aa1953e 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -167,6 +167,7 @@ enum KVM_RISCV_ISA_EXT_ID {
>  	KVM_RISCV_ISA_EXT_ZFA,
>  	KVM_RISCV_ISA_EXT_ZTSO,
>  	KVM_RISCV_ISA_EXT_ZACAS,

KVM_RISCV_ISA_EXT_SSCOFPMF got added here in 6.10-rc1 so there is a
conflict now unfortunately. Easy to fix at least!

- Charlie

> +	KVM_RISCV_ISA_EXT_ZIMOP,
>  	KVM_RISCV_ISA_EXT_MAX,
>  };
>  
> diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
> index f4a6124d25c9..c6ee763422f2 100644
> --- a/arch/riscv/kvm/vcpu_onereg.c
> +++ b/arch/riscv/kvm/vcpu_onereg.c
> @@ -60,6 +60,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
>  	KVM_ISA_EXT_ARR(ZIHINTNTL),
>  	KVM_ISA_EXT_ARR(ZIHINTPAUSE),
>  	KVM_ISA_EXT_ARR(ZIHPM),
> +	KVM_ISA_EXT_ARR(ZIMOP),
>  	KVM_ISA_EXT_ARR(ZKND),
>  	KVM_ISA_EXT_ARR(ZKNE),
>  	KVM_ISA_EXT_ARR(ZKNH),
> @@ -137,6 +138,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
>  	case KVM_RISCV_ISA_EXT_ZIHINTNTL:
>  	case KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
>  	case KVM_RISCV_ISA_EXT_ZIHPM:
> +	case KVM_RISCV_ISA_EXT_ZIMOP:
>  	case KVM_RISCV_ISA_EXT_ZKND:
>  	case KVM_RISCV_ISA_EXT_ZKNE:
>  	case KVM_RISCV_ISA_EXT_ZKNH:
> -- 
> 2.43.0
> 
> 
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv
diff mbox series

Patch

diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index b1c503c2959c..35a12aa1953e 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -167,6 +167,7 @@  enum KVM_RISCV_ISA_EXT_ID {
 	KVM_RISCV_ISA_EXT_ZFA,
 	KVM_RISCV_ISA_EXT_ZTSO,
 	KVM_RISCV_ISA_EXT_ZACAS,
+	KVM_RISCV_ISA_EXT_ZIMOP,
 	KVM_RISCV_ISA_EXT_MAX,
 };
 
diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index f4a6124d25c9..c6ee763422f2 100644
--- a/arch/riscv/kvm/vcpu_onereg.c
+++ b/arch/riscv/kvm/vcpu_onereg.c
@@ -60,6 +60,7 @@  static const unsigned long kvm_isa_ext_arr[] = {
 	KVM_ISA_EXT_ARR(ZIHINTNTL),
 	KVM_ISA_EXT_ARR(ZIHINTPAUSE),
 	KVM_ISA_EXT_ARR(ZIHPM),
+	KVM_ISA_EXT_ARR(ZIMOP),
 	KVM_ISA_EXT_ARR(ZKND),
 	KVM_ISA_EXT_ARR(ZKNE),
 	KVM_ISA_EXT_ARR(ZKNH),
@@ -137,6 +138,7 @@  static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
 	case KVM_RISCV_ISA_EXT_ZIHINTNTL:
 	case KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
 	case KVM_RISCV_ISA_EXT_ZIHPM:
+	case KVM_RISCV_ISA_EXT_ZIMOP:
 	case KVM_RISCV_ISA_EXT_ZKND:
 	case KVM_RISCV_ISA_EXT_ZKNE:
 	case KVM_RISCV_ISA_EXT_ZKNH: