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RISC-V: KVM: Allow Zalasr extensions for Guest/VM

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Extend the KVM ISA extension ONE_REG interface to allow KVM user space
to detect and enable Zalasr extensions for Guest/VM.

Signed-off-by: Xu Lu <luxu.kernel@bytedance.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20251020042457.30915-5-luxu.kernel@bytedance.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Xu Lu 2025-10-20 12:24:56 +08:00 committed by Anup Patel
parent 39ad809dd2
commit 655d330c05
2 changed files with 3 additions and 0 deletions
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1
arch/riscv/include/uapi/asm/kvm.h
View File

@ -194,6 +194,7 @@ enum KVM_RISCV_ISA_EXT_ID {
KVM_RISCV_ISA_EXT_ZVFBFWMA,
KVM_RISCV_ISA_EXT_ZCLSD,
KVM_RISCV_ISA_EXT_ZILSD,
KVM_RISCV_ISA_EXT_ZALASR,
KVM_RISCV_ISA_EXT_MAX,
};

2
arch/riscv/kvm/vcpu_onereg.c
View File

@ -50,6 +50,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
KVM_ISA_EXT_ARR(ZAAMO),
KVM_ISA_EXT_ARR(ZABHA),
KVM_ISA_EXT_ARR(ZACAS),
KVM_ISA_EXT_ARR(ZALASR),
KVM_ISA_EXT_ARR(ZALRSC),
KVM_ISA_EXT_ARR(ZAWRS),
KVM_ISA_EXT_ARR(ZBA),
@ -189,6 +190,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
case KVM_RISCV_ISA_EXT_ZAAMO:
case KVM_RISCV_ISA_EXT_ZABHA:
case KVM_RISCV_ISA_EXT_ZACAS:
case KVM_RISCV_ISA_EXT_ZALASR:
case KVM_RISCV_ISA_EXT_ZALRSC:
case KVM_RISCV_ISA_EXT_ZAWRS:
case KVM_RISCV_ISA_EXT_ZBA: