Commit 655d330c authored by Xu Lu's avatar Xu Lu Committed by Anup Patel
Browse files

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



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: default avatarXu Lu <luxu.kernel@bytedance.com>
Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20251020042457.30915-5-luxu.kernel@bytedance.com


Signed-off-by: default avatarAnup Patel <anup@brainfault.org>
parent 39ad809d

arch/riscv/include/uapi/asm/kvm.h

+1 −0
Original line number Diff line number Diff line
@@ -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,

};

arch/riscv/kvm/vcpu_onereg.c

+2 −0
Original line number Diff line number Diff line
@@ -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: