diff options
| author | Andrew Jones <ajones@ventanamicro.com> | 2022-10-02 07:49:05 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2022-10-02 07:49:05 +0300 |
| commit | 56852c6211971798dfbe4098c8a8528b59234de2 (patch) | |
| tree | 631a9fc4677d51f62689adf8c2b95beca7ae9d56 /arch/riscv/include | |
| parent | afd5dde9a186b8fc5742fff707f184760c4af1a9 (diff) | |
| download | linux-56852c6211971798dfbe4098c8a8528b59234de2.tar.xz | |
RISC-V: KVM: Expose Zicbom to the guest
Guests may use the cbo.inval,clean,flush instructions when the
CPU has the Zicbom extension and the hypervisor sets henvcfg.CBIE
(for cbo.inval) and henvcfg.CBCFE (for cbo.clean,flush).
Add Zicbom support for KVM guests which may be enabled and
disabled from KVM userspace using the ISA extension ONE_REG API.
Also opportunistically switch the other isa extension checks in
kvm_riscv_vcpu_update_config() to riscv_isa_extension_available().
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/uapi/asm/kvm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h index 3d7771300567..8985ff234c01 100644 --- a/arch/riscv/include/uapi/asm/kvm.h +++ b/arch/riscv/include/uapi/asm/kvm.h @@ -101,6 +101,7 @@ enum KVM_RISCV_ISA_EXT_ID { KVM_RISCV_ISA_EXT_SSTC, KVM_RISCV_ISA_EXT_SVINVAL, KVM_RISCV_ISA_EXT_ZIHINTPAUSE, + KVM_RISCV_ISA_EXT_ZICBOM, KVM_RISCV_ISA_EXT_MAX, }; |