RISC-V: KVM: Modify SBI extension handler to return SBI error code

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Currently, the SBI extension handle is expected to return Linux error code.
The top SBI layer converts the Linux error code to SBI specific error code
that can be returned to guest invoking the SBI calls. This model works
as long as SBI error codes have 1-to-1 mappings between them.
However, that may not be true always. This patch attempts to disassociate
both these error codes by allowing the SBI extension implementation to
return SBI specific error codes as well.

The extension will continue to return the Linux error specific code which
will indicate any problem *with* the extension emulation while the
SBI specific error will indicate the problem *of* the emulation.

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

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This commit is contained in:

Atish Patra 2023-02-04 17:15:07 -08:00 • committed by Anup Patel

parent 8cdb8a5385

commit bae0dfd74e

6 changed files with 81 additions and 97 deletions

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10

arch/riscv/include/asm/kvm_vcpu_sbi.h

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61

arch/riscv/kvm/vcpu_sbi.c

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19

arch/riscv/kvm/vcpu_sbi_base.c

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arch/riscv/kvm/vcpu_sbi_hsm.c

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arch/riscv/kvm/vcpu_sbi_replace.c

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17

arch/riscv/kvm/vcpu_sbi_v01.c

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