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RISC-V: KVM: Allow Zba and Zbs extensions for Guest/VM

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We extend the KVM ISA extension ONE_REG interface to allow KVM
user space to detect and enable Zba and Zbs extensions 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>
This commit is contained in:
Anup Patel 2023-07-12 12:38:11 +05:30 committed by Anup Patel
parent 613029442a
commit 41716861e4
2 changed files with 6 additions and 0 deletions
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2
arch/riscv/include/uapi/asm/kvm.h
View File

@ -124,6 +124,8 @@ enum KVM_RISCV_ISA_EXT_ID {
KVM_RISCV_ISA_EXT_SSAIA,
KVM_RISCV_ISA_EXT_V,
KVM_RISCV_ISA_EXT_SVNAPOT,
KVM_RISCV_ISA_EXT_ZBA,
KVM_RISCV_ISA_EXT_ZBS,
KVM_RISCV_ISA_EXT_MAX,
};

4
arch/riscv/kvm/vcpu_onereg.c
View File

@ -38,7 +38,9 @@ static const unsigned long kvm_isa_ext_arr[] = {
KVM_ISA_EXT_ARR(SVINVAL),
KVM_ISA_EXT_ARR(SVNAPOT),
KVM_ISA_EXT_ARR(SVPBMT),
KVM_ISA_EXT_ARR(ZBA),
KVM_ISA_EXT_ARR(ZBB),
KVM_ISA_EXT_ARR(ZBS),
KVM_ISA_EXT_ARR(ZIHINTPAUSE),
KVM_ISA_EXT_ARR(ZICBOM),
KVM_ISA_EXT_ARR(ZICBOZ),
@ -82,7 +84,9 @@ 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_ZIHINTPAUSE:
case KVM_RISCV_ISA_EXT_ZBA:
case KVM_RISCV_ISA_EXT_ZBB:
case KVM_RISCV_ISA_EXT_ZBS:
return false;
default:
break;