[PATCH 08/15] RISC-V: KVM: Allow Zfh[min] extensions for Guest/VM

Anup Patel
2023-11-28T14:55:29Z

We extend the KVM ISA extension ONE_REG interface to allow KVM
user space to detect and enable Zfh[min] extensions for Guest/VM.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
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 241632f91f73..fa1a8e01b803 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -160,6 +160,8 @@ enum KVM_RISCV_ISA_EXT_ID {
KVM_RISCV_ISA_EXT_ZVKSED,
KVM_RISCV_ISA_EXT_ZVKSH,
KVM_RISCV_ISA_EXT_ZVKT,
+ KVM_RISCV_ISA_EXT_ZFH,
+ KVM_RISCV_ISA_EXT_ZFHMIN,
KVM_RISCV_ISA_EXT_MAX,
};

diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index 4cd075f4cf9f..ba418ac47e81 100644
--- a/arch/riscv/kvm/vcpu_onereg.c
+++ b/arch/riscv/kvm/vcpu_onereg.c
@@ -47,6 +47,8 @@ static const unsigned long kvm_isa_ext_arr[] = {
KVM_ISA_EXT_ARR(ZBKC),
KVM_ISA_EXT_ARR(ZBKX),
KVM_ISA_EXT_ARR(ZBS),
+ KVM_ISA_EXT_ARR(ZFH),
+ KVM_ISA_EXT_ARR(ZFHMIN),
KVM_ISA_EXT_ARR(ZICBOM),
KVM_ISA_EXT_ARR(ZICBOZ),
KVM_ISA_EXT_ARR(ZICNTR),
@@ -118,6 +120,8 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
case KVM_RISCV_ISA_EXT_ZBKC:
case KVM_RISCV_ISA_EXT_ZBKX:
case KVM_RISCV_ISA_EXT_ZBS:
+ case KVM_RISCV_ISA_EXT_ZFH:
+ case KVM_RISCV_ISA_EXT_ZFHMIN:
case KVM_RISCV_ISA_EXT_ZICNTR:
case KVM_RISCV_ISA_EXT_ZICOND:
case KVM_RISCV_ISA_EXT_ZICSR:
--
2.34.1