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 <apatel@xxxxxxxxxxxxxxxx> > --- > 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 <ajones@xxxxxxxxxxxxxxxx>
