Re: [PATCH v3 3/9] RISC-V: KVM: Allow some SBI extensions to be disabled by default
From: Andrew Jones <hidden>
Date: 2023-10-20 08:13:51
Also in:
kvm, kvm-riscv, linux-riscv, linux-serial, lkml
On Fri, Oct 20, 2023 at 12:51:34PM +0530, Anup Patel wrote:
Currently, all SBI extensions are enabled by default which is problematic for SBI extensions (such as DBCN) which are forwarded to the KVM user-space because we might have an older KVM user-space which is not aware/ready to handle newer SBI extensions. Ideally, the SBI extensions forwarded to the KVM user-space must be disabled by default. To address above, we allow certain SBI extensions to be disabled by default so that KVM user-space must explicitly enable such SBI extensions to receive forwarded calls from Guest VCPU. Signed-off-by: Anup Patel <redacted> --- arch/riscv/include/asm/kvm_vcpu_sbi.h | 4 ++ arch/riscv/kvm/vcpu.c | 6 +++ arch/riscv/kvm/vcpu_sbi.c | 57 +++++++++++++-------------- 3 files changed, 38 insertions(+), 29 deletions(-)
Reviewed-by: Andrew Jones <redacted>