RISC-V: KVM: selftests: Fix firmware counter read in sbi_pmu_test

The current sbi_pmu_test attempts to read firmware counters without
configuring them first with SBI_EXT_PMU_COUNTER_CFG_MATCH.

Previously this did not fail because KVM incorrectly allowed the read
and accessed fw_event[] with an out-of-bounds index when the counter
was unconfigured. After fixing that bug, the read now correctly returns
SBI_ERR_INVALID_PARAM, causing the selftest to fail.

Update the test to configure a firmware event before reading the
counter. Also add a negative test to ensure that attempting to read an
unconfigured firmware counter fails gracefully.

Signed-off-by: Jiakai Xu <xujiakai2025@iscas.ac.cn>
Signed-off-by: Jiakai Xu <jiakaiPeanut@gmail.com>
Reviewed-by: Andrew Jones <andrew.jones@oss.qualcomm.com>
Reviewed-by: Nutty Liu <nutty.liu@hotmail.com>
Link: https://lore.kernel.org/r/20260316014533.2312254-3-xujiakai2025@iscas.ac.cn
Signed-off-by: Anup Patel <anup@brainfault.org>

0 files changed, 0 insertions, 0 deletions