[PATCH 4/7] RISC-V: KVM: Allow Zicond extension for Guest/VM

Anup Patel
2023-09-19T03:54:28Z

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

Signed-off-by: Anup Patel <apatel@ventanamicro.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 e030c12c7dfc..35ceb38a4eff 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -139,6 +139,7 @@ enum KVM_RISCV_ISA_EXT_ID {
KVM_RISCV_ISA_EXT_ZIHPM,
KVM_RISCV_ISA_EXT_SMSTATEEN,
KVM_RISCV_ISA_EXT_XVENTANACONDOPS,
+ KVM_RISCV_ISA_EXT_ZICOND,
KVM_RISCV_ISA_EXT_MAX,
};

diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index 17a847a1114b..d3ca4969c985 100644
--- a/arch/riscv/kvm/vcpu_onereg.c
+++ b/arch/riscv/kvm/vcpu_onereg.c
@@ -47,6 +47,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
KVM_ISA_EXT_ARR(ZICBOM),
KVM_ISA_EXT_ARR(ZICBOZ),
KVM_ISA_EXT_ARR(ZICNTR),
+ KVM_ISA_EXT_ARR(ZICOND),
KVM_ISA_EXT_ARR(ZICSR),
KVM_ISA_EXT_ARR(ZIFENCEI),
KVM_ISA_EXT_ARR(ZIHINTPAUSE),
@@ -95,6 +96,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
case KVM_RISCV_ISA_EXT_ZBB:
case KVM_RISCV_ISA_EXT_ZBS:
case KVM_RISCV_ISA_EXT_ZICNTR:
+ case KVM_RISCV_ISA_EXT_ZICOND:
case KVM_RISCV_ISA_EXT_ZICSR:
case KVM_RISCV_ISA_EXT_ZIFENCEI:
case KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
--
2.34.1