RISC-V: KVM: Allow some SBI extensions to be disabled by default

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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@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>

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Anup Patel 2023-10-11 17:52:26 +05:30 • committed by Anup Patel

parent b88e87a0a1

commit 56d8a385b6

3 changed files with 38 additions and 29 deletions

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4

arch/riscv/include/asm/kvm_vcpu_sbi.h

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6

arch/riscv/kvm/vcpu.c

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57

arch/riscv/kvm/vcpu_sbi.c

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