RISC-V: KVM: Allow Zfa extension for Guest/VM

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

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>

diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index 7d07722aa1aaf12a1135687f3c1d3c42a9999fc6..7499e88a947c086c5f569e98a899f50d098a8335 100644 (file)
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -165,6 +165,7 @@ enum KVM_RISCV_ISA_EXT_ID {
        KVM_RISCV_ISA_EXT_ZIHINTNTL,
        KVM_RISCV_ISA_EXT_ZVFH,
        KVM_RISCV_ISA_EXT_ZVFHMIN,
+       KVM_RISCV_ISA_EXT_ZFA,
        KVM_RISCV_ISA_EXT_MAX,
 };
 

diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index 707d9d9883c856b4a196132be6f1d33d39271761..5f7355e960084b4a4a17ea294e92352f7a70da60 100644 (file)
--- 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(ZBKC),
        KVM_ISA_EXT_ARR(ZBKX),
        KVM_ISA_EXT_ARR(ZBS),
+       KVM_ISA_EXT_ARR(ZFA),
        KVM_ISA_EXT_ARR(ZFH),
        KVM_ISA_EXT_ARR(ZFHMIN),
        KVM_ISA_EXT_ARR(ZICBOM),
@@ -123,6 +124,7 @@ 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_ZFA:
        case KVM_RISCV_ISA_EXT_ZFH:
        case KVM_RISCV_ISA_EXT_ZFHMIN:
        case KVM_RISCV_ISA_EXT_ZICNTR: