RISC-V: KVM: Don't treat SBI HFENCE calls as NOPs

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[ Upstream commit 2e7be16299 ]

The SBI specification clearly states that SBI HFENCE calls should
return SBI_ERR_NOT_SUPPORTED when one of the target hart doesn’t
support hypervisor extension (aka nested virtualization in-case
of KVM RISC-V).

Fixes: c7fa3c48de ("RISC-V: KVM: Treat SBI HFENCE calls as NOPs")
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20250605061458.196003-3-apatel@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Anup Patel 2025-06-05 11:44:47 +05:30 • committed by Greg Kroah-Hartman

parent 8a8b342332

commit 9bcafbd270

1 changed files with 2 additions and 2 deletions

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arch/riscv/kvm/vcpu_sbi_replace.c

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