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riscv: kvm: return SBI_ERR_FAILURE for pmu_event_info() when OOM

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kvm_riscv_vcpu_pmu_event_info() returned -ENOMEM from the
SBI extension handler, which caused kvm_riscv_vcpu_sbi_ecall()
to abort KVM_RUN and surface the error to userspace instead of
completing the ECALL with a negative SBI error in a0.
Use SBI_ERR_FAILURE and the normal retdata path, matching other PMU
handlers and kvm_sbi_ext_pmu_handler comment.

Fixes: e309fd113b ("RISC-V: KVM: Implement get event info function")
Cc: stable@vger.kernel.org
Signed-off-by: Osama Abdelkader <osama.abdelkader@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260514173642.41448-2-osama.abdelkader@gmail.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Osama Abdelkader
2026-05-18 10:19:18 +05:30
committed by Anup Patel
parent 0835ee2693
commit 0e9d0e7a7c
1 changed files with 4 additions and 2 deletions
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arch/riscv/kvm/vcpu_pmu.c
+4 -2
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@@ -501,8 +501,10 @@ int kvm_riscv_vcpu_pmu_event_info(struct kvm_vcpu *vcpu, unsigned long saddr_low
}
einfo = kzalloc(shmem_size, GFP_KERNEL);
if (!einfo)
return -ENOMEM;
if (!einfo) {
ret = SBI_ERR_FAILURE;
goto out;
}
ret = kvm_vcpu_read_guest(vcpu, shmem, einfo, shmem_size);
if (ret) {