p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

perf/x86/intel/uncore: Remove SBOX support for Broadwell server 

There was a report that on certain Broadwell-EP systems writing any bit of
the SBOX PMU initialization MSR would #GP at boot. This did not happen
on all systems. My test systems booted fine.

Considering both DE and EP may have such issues, this patch removes SBOX
support for all Broadwell platforms for now.

Reported-and-tested-by: Mark van Dijk <mark@voidzero.net>
Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/1464347540-5763-1-git-send-email-kan.liang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Kan Liang 2016-05-27 04:12:20 -07:00 committed by Ingo Molnar
parent 711460514b
commit 3b94a89166
1 changed files with 0 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
arch/x86/events/intel/uncore_snbep.c
View File

@ -2868,27 +2868,10 @@ static struct intel_uncore_type bdx_uncore_cbox = {
.format_group = &hswep_uncore_cbox_format_group, .format_group = &hswep_uncore_cbox_format_group,
}; };
static struct intel_uncore_type bdx_uncore_sbox = {
.name = "sbox",
.num_counters = 4,
.num_boxes = 4,
.perf_ctr_bits = 48,
.event_ctl = HSWEP_S0_MSR_PMON_CTL0,
.perf_ctr = HSWEP_S0_MSR_PMON_CTR0,
.event_mask = HSWEP_S_MSR_PMON_RAW_EVENT_MASK,
.box_ctl = HSWEP_S0_MSR_PMON_BOX_CTL,
.msr_offset = HSWEP_SBOX_MSR_OFFSET,
.ops = &hswep_uncore_sbox_msr_ops,
.format_group = &hswep_uncore_sbox_format_group,
};
#define BDX_MSR_UNCORE_SBOX 3
static struct intel_uncore_type *bdx_msr_uncores[] = { static struct intel_uncore_type *bdx_msr_uncores[] = {
&bdx_uncore_ubox, &bdx_uncore_ubox,
&bdx_uncore_cbox, &bdx_uncore_cbox,
&hswep_uncore_pcu, &hswep_uncore_pcu,
&bdx_uncore_sbox,
NULL, NULL,
}; };
@ -2897,10 +2880,6 @@ void bdx_uncore_cpu_init(void)
if (bdx_uncore_cbox.num_boxes > boot_cpu_data.x86_max_cores) if (bdx_uncore_cbox.num_boxes > boot_cpu_data.x86_max_cores)
bdx_uncore_cbox.num_boxes = boot_cpu_data.x86_max_cores; bdx_uncore_cbox.num_boxes = boot_cpu_data.x86_max_cores;
uncore_msr_uncores = bdx_msr_uncores; uncore_msr_uncores = bdx_msr_uncores;
/* BDX-DE doesn't have SBOX */
if (boot_cpu_data.x86_model == 86)
uncore_msr_uncores[BDX_MSR_UNCORE_SBOX] = NULL;
} }
static struct intel_uncore_type bdx_uncore_ha = { static struct intel_uncore_type bdx_uncore_ha = {