linux-kernel - [PATCH 02/27] RISC-V: KVM: Fix error code returned for Ssaia ONE

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Message-ID: <20260120080013.2153519-3-anup.patel@oss.qualcomm.com>
Date: Tue, 20 Jan 2026 13:29:48 +0530
From: Anup Patel <anup.patel@....qualcomm.com>
To: Paolo Bonzini <pbonzini@...hat.com>, Atish Patra <atish.patra@...ux.dev>
Cc: Palmer Dabbelt <palmer@...belt.com>, Paul Walmsley <pjw@...nel.org>,
        Alexandre Ghiti <alex@...ti.fr>, Shuah Khan <shuah@...nel.org>,
        Anup Patel <anup@...infault.org>,
        Andrew Jones <andrew.jones@....qualcomm.com>,
        kvm-riscv@...ts.infradead.org, kvm@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Anup Patel <anup.patel@....qualcomm.com>
Subject: [PATCH 02/27] RISC-V: KVM: Fix error code returned for Ssaia ONE_REG

Return -ENOENT for Ssaia ONE_REG when Ssaia is not enabled
for a VCPU.

This will make Ssaia ONE_REG error codes consistent with
other ONE_REG interfaces of KVM RISC-V.

Fixes: 2a88f38cd58d ("RISC-V: KVM: return ENOENT in *_one_reg() when reg is unknown")
Signed-off-by: Anup Patel <anup.patel@....qualcomm.com>
---
 arch/riscv/kvm/aia.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/riscv/kvm/aia.c b/arch/riscv/kvm/aia.c
index dad318185660..31baea9f0589 100644
--- a/arch/riscv/kvm/aia.c
+++ b/arch/riscv/kvm/aia.c
@@ -183,6 +183,8 @@ int kvm_riscv_vcpu_aia_get_csr(struct kvm_vcpu *vcpu,
 {
 	struct kvm_vcpu_aia_csr *csr = &vcpu->arch.aia_context.guest_csr;
 
+	if (!riscv_isa_extension_available(vcpu->arch.isa, SSAIA))
+		return -ENOENT;
 	if (reg_num >= sizeof(struct kvm_riscv_aia_csr) / sizeof(unsigned long))
 		return -ENOENT;
 
@@ -199,6 +201,8 @@ int kvm_riscv_vcpu_aia_set_csr(struct kvm_vcpu *vcpu,
 {
 	struct kvm_vcpu_aia_csr *csr = &vcpu->arch.aia_context.guest_csr;
 
+	if (!riscv_isa_extension_available(vcpu->arch.isa, SSAIA))
+		return -ENOENT;
 	if (reg_num >= sizeof(struct kvm_riscv_aia_csr) / sizeof(unsigned long))
 		return -ENOENT;
 
-- 
2.43.0