From 12bf85a71000af7419b19b5e90910919f36f336c Mon Sep 17 00:00:00 2001 From: Thiago Jung Bauermann Date: Thu, 29 Jun 2017 18:55:31 -0300 Subject: [PATCH] powerpc/perf/hv-24x7: Fix passing of catalog version number H_GET_24X7_CATALOG_PAGE needs to be passed the version number obtained from the first catalog page obtained previously. This is a 64 bit number, but create_events_from_catalog truncates it to 32-bit. This worked on POWER8, but POWER9 actually uses the upper bits so the call fails with H_P3 because the hypervisor doesn't recognize the version. This patch also adds the hcall return code to the error message, which is helpful when debugging the problem. Fixes: 5c5cd7b50259 ("powerpc/perf/hv-24x7: parse catalog and populate sysfs with events") Reviewed-by: Sukadev Bhattiprolu Signed-off-by: Thiago Jung Bauermann Signed-off-by: Michael Ellerman --- arch/powerpc/perf/hv-24x7.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c index 7b2ca16b1eb4..1354cde7095c 100644 --- a/arch/powerpc/perf/hv-24x7.c +++ b/arch/powerpc/perf/hv-24x7.c @@ -670,7 +670,7 @@ static int create_events_from_catalog(struct attribute ***events_, event_data_bytes, junk_events, event_idx, event_attr_ct, i, attr_max, event_idx_last, desc_ct, long_desc_ct; ssize_t ct, ev_len; - uint32_t catalog_version_num; + uint64_t catalog_version_num; struct attribute **events, **event_descs, **event_long_descs; struct hv_24x7_catalog_page_0 *page_0 = kmem_cache_alloc(hv_page_cache, GFP_KERNEL); @@ -706,8 +706,8 @@ static int create_events_from_catalog(struct attribute ***events_, event_data_offs = be16_to_cpu(page_0->event_data_offs); event_data_len = be16_to_cpu(page_0->event_data_len); - pr_devel("cv %zu cl %zu eec %zu edo %zu edl %zu\n", - (size_t)catalog_version_num, catalog_len, + pr_devel("cv %llu cl %zu eec %zu edo %zu edl %zu\n", + catalog_version_num, catalog_len, event_entry_count, event_data_offs, event_data_len); if ((MAX_4K < event_data_len) @@ -761,8 +761,8 @@ static int create_events_from_catalog(struct attribute ***events_, catalog_version_num, i + event_data_offs); if (hret) { - pr_err("failed to get event data in page %zu\n", - i + event_data_offs); + pr_err("Failed to get event data in page %zu: rc=%ld\n", + i + event_data_offs, hret); ret = -EIO; goto e_event_data; } -- 2.20.1