Unverified Commit 2d79608c authored by Clément Léger's avatar Clément Léger Committed by Alexandre Ghiti
Browse files

RISC-V: KVM: Allow Zaamo/Zalrsc extensions for Guest/VM 



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

Signed-off-by: default avatarClément Léger <cleger@rivosinc.com>
Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20240619153913.867263-5-cleger@rivosinc.com


Signed-off-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
parent 9d45d1ff

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

+2 −0
Original line number Diff line number Diff line
@@ -182,6 +182,8 @@ enum KVM_RISCV_ISA_EXT_ID { 
	KVM_RISCV_ISA_EXT_SVVPTC,

	KVM_RISCV_ISA_EXT_ZABHA,

	KVM_RISCV_ISA_EXT_ZICCRSE,

	KVM_RISCV_ISA_EXT_ZAAMO,

	KVM_RISCV_ISA_EXT_ZALRSC,

	KVM_RISCV_ISA_EXT_MAX,

};

arch/riscv/kvm/vcpu_onereg.c

+4 −0
Original line number Diff line number Diff line
@@ -47,8 +47,10 @@ static const unsigned long kvm_isa_ext_arr[] = { 
	KVM_ISA_EXT_ARR(SVNAPOT),

	KVM_ISA_EXT_ARR(SVPBMT),

	KVM_ISA_EXT_ARR(SVVPTC),

	KVM_ISA_EXT_ARR(ZAAMO),

	KVM_ISA_EXT_ARR(ZABHA),

	KVM_ISA_EXT_ARR(ZACAS),

	KVM_ISA_EXT_ARR(ZALRSC),

	KVM_ISA_EXT_ARR(ZAWRS),

	KVM_ISA_EXT_ARR(ZBA),

	KVM_ISA_EXT_ARR(ZBB),
@@ -149,8 +151,10 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext) 
	case KVM_RISCV_ISA_EXT_SVINVAL:

	case KVM_RISCV_ISA_EXT_SVNAPOT:

	case KVM_RISCV_ISA_EXT_SVVPTC:

	case KVM_RISCV_ISA_EXT_ZAAMO:

	case KVM_RISCV_ISA_EXT_ZABHA:

	case KVM_RISCV_ISA_EXT_ZACAS:

	case KVM_RISCV_ISA_EXT_ZALRSC:

	case KVM_RISCV_ISA_EXT_ZAWRS:

	case KVM_RISCV_ISA_EXT_ZBA:

	case KVM_RISCV_ISA_EXT_ZBB: