2023-07-12 16:29:13

by Anup Patel

Subject: [PATCH 3/7] RISC-V: KVM: Allow Zba and Zbs extensions for Guest/VM

We extend the KVM ISA extension ONE_REG interface to allow KVM
user space to detect and enable Zba and Zbs extensions for Guest/VM.

Signed-off-by: Anup Patel <[email protected]>
---
arch/riscv/include/uapi/asm/kvm.h | 2 ++
arch/riscv/kvm/vcpu_onereg.c | 4 ++++
2 files changed, 6 insertions(+)

diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index 6c2285f86545..68f929d88f43 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -124,6 +124,8 @@ enum KVM_RISCV_ISA_EXT_ID {
KVM_RISCV_ISA_EXT_SSAIA,
KVM_RISCV_ISA_EXT_V,
KVM_RISCV_ISA_EXT_SVNAPOT,
+ KVM_RISCV_ISA_EXT_ZBA,
+ KVM_RISCV_ISA_EXT_ZBS,
KVM_RISCV_ISA_EXT_MAX,
};

diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index 236359722364..555acebcbe02 100644
--- a/arch/riscv/kvm/vcpu_onereg.c
+++ b/arch/riscv/kvm/vcpu_onereg.c
@@ -37,7 +37,9 @@ static const unsigned long kvm_isa_ext_arr[] = {
KVM_ISA_EXT_ARR(SVINVAL),
KVM_ISA_EXT_ARR(SVNAPOT),
KVM_ISA_EXT_ARR(SVPBMT),
+ KVM_ISA_EXT_ARR(ZBA),
KVM_ISA_EXT_ARR(ZBB),
+ KVM_ISA_EXT_ARR(ZBS),
KVM_ISA_EXT_ARR(ZIHINTPAUSE),
KVM_ISA_EXT_ARR(ZICBOM),
KVM_ISA_EXT_ARR(ZICBOZ),
@@ -81,7 +83,9 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
case KVM_RISCV_ISA_EXT_SVINVAL:
case KVM_RISCV_ISA_EXT_SVNAPOT:
case KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
+ case KVM_RISCV_ISA_EXT_ZBA:
case KVM_RISCV_ISA_EXT_ZBB:
+ case KVM_RISCV_ISA_EXT_ZBS:
return false;
default:
break;
--
2.34.1

2023-07-13 11:43:35

by Andrew Jones

Subject: Re: [PATCH 3/7] RISC-V: KVM: Allow Zba and Zbs extensions for Guest/VM

On Wed, Jul 12, 2023 at 09:40:43PM +0530, Anup Patel wrote:
> We extend the KVM ISA extension ONE_REG interface to allow KVM
> user space to detect and enable Zba and Zbs extensions for Guest/VM.
>
> Signed-off-by: Anup Patel <[email protected]>
> ---
> arch/riscv/include/uapi/asm/kvm.h | 2 ++
> arch/riscv/kvm/vcpu_onereg.c | 4 ++++
> 2 files changed, 6 insertions(+)
>

Reviewed-by: Andrew Jones <[email protected]>