RISC-V: KVM: Add SBI system suspend support

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Implement a KVM SBI SUSP extension handler. The handler only
validates the system suspend entry criteria and prepares for resuming
in the appropriate state at the resume_addr (as specified by the SBI
spec), but then it forwards the call to the VMM where any system
suspend behavior may be implemented. Since VMM support is needed, KVM
disables the extension by default.

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20241017074538.18867-5-ajones@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>

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Andrew Jones 2024-10-17 09:45:40 +02:00 • committed by Anup Patel

parent fc033cf25e

commit 023c15151f

5 changed files with 80 additions and 0 deletions

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1

arch/riscv/include/asm/kvm_vcpu_sbi.h

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1

arch/riscv/include/uapi/asm/kvm.h

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arch/riscv/kvm/Makefile

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4

arch/riscv/kvm/vcpu_sbi.c

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73

arch/riscv/kvm/vcpu_sbi_system.c

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