powerpc/perf/hv-24x7: Update domain value check

Valid domain value is in range 1 to HV_PERF_DOMAIN_MAX. Current code has
check for domain value greater than or equal to HV_PERF_DOMAIN_MAX. But
the check for domain value 0 is missing.

Fix this issue by adding check for domain value 0.

Before:
  # ./perf stat -v -e hv_24x7/CPM_ADJUNCT_INST,domain=0,core=1/ sleep 1
  Using CPUID 00800200
  Control descriptor is not initialized
  Error:
  The sys_perf_event_open() syscall returned with 5 (Input/output error) for
  event (hv_24x7/CPM_ADJUNCT_INST,domain=0,core=1/).
  /bin/dmesg | grep -i perf may provide additional information.

  Result from dmesg:
  [   37.819387] hv-24x7: hcall failed: [0 0x60040000 0x100 0] => ret
  0xfffffffffffffffc (-4) detail=0x2000000 failing ix=0

After:
  # ./perf stat -v -e hv_24x7/CPM_ADJUNCT_INST,domain=0,core=1/ sleep 1
  Using CPUID 00800200
  Control descriptor is not initialized
  Warning:
  hv_24x7/CPM_ADJUNCT_INST,domain=0,core=1/ event is not supported by the kernel.
  failed to read counter hv_24x7/CPM_ADJUNCT_INST,domain=0,core=1/

Fixes: ebd4a5a3ebd9 ("powerpc/perf/hv-24x7: Minor improvements")
Reported-by: Krishan Gopal Sarawast <krishang@linux.vnet.ibm.com>
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Tested-by: Disha Goel <disgoel@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230825055601.360083-1-kjain@linux.ibm.com

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c
index 317175791d23..3449be7c0d51 100644
--- a/arch/powerpc/perf/hv-24x7.c
+++ b/arch/powerpc/perf/hv-24x7.c
@@ -1418,7 +1418,7 @@ static int h_24x7_event_init(struct perf_event *event)
 	}
 
 	domain = event_get_domain(event);
-	if (domain >= HV_PERF_DOMAIN_MAX) {
+	if (domain  == 0 || domain >= HV_PERF_DOMAIN_MAX) {
 		pr_devel("invalid domain %d\n", domain);
 		return -EINVAL;
 	}