diff options
| author | Steve French <sfrench@us.ibm.com> | 2011-12-16 00:39:20 -0600 |
|---|---|---|
| committer | Steve French <sfrench@us.ibm.com> | 2011-12-16 00:39:20 -0600 |
| commit | aaf015890754d58dcb71a4aa44ed246bb082bcf6 (patch) | |
| tree | 17b51ff707fd1b3efec3a3ab872f0d7a7416aca5 /arch/x86/kernel/cpu/perf_event_amd_ibs.c | |
| parent | 9c32c63bb70b2fafc3b18bee29959c3bf245ceba (diff) | |
| parent | 8def5f51b012efb00e77ba2d04696cc0aadd0609 (diff) | |
Merge branch 'master' of git+ssh://git.samba.org/data/git/sfrench/cifs-2.6
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event_amd_ibs.c')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event_amd_ibs.c | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_amd_ibs.c b/arch/x86/kernel/cpu/perf_event_amd_ibs.c index ab6343d21825..3b8a2d30d14e 100644 --- a/arch/x86/kernel/cpu/perf_event_amd_ibs.c +++ b/arch/x86/kernel/cpu/perf_event_amd_ibs.c @@ -199,8 +199,7 @@ static int force_ibs_eilvt_setup(void) goto out; } - pr_err(FW_BUG "using offset %d for IBS interrupts\n", offset); - pr_err(FW_BUG "workaround enabled for IBS LVT offset\n"); + pr_info("IBS: LVT offset %d assigned\n", offset); return 0; out: @@ -265,19 +264,23 @@ perf_ibs_cpu_notifier(struct notifier_block *self, unsigned long action, void *h static __init int amd_ibs_init(void) { u32 caps; - int ret; + int ret = -EINVAL; caps = __get_ibs_caps(); if (!caps) return -ENODEV; /* ibs not supported by the cpu */ - if (!ibs_eilvt_valid()) { - ret = force_ibs_eilvt_setup(); - if (ret) { - pr_err("Failed to setup IBS, %d\n", ret); - return ret; - } - } + /* + * Force LVT offset assignment for family 10h: The offsets are + * not assigned by the BIOS for this family, so the OS is + * responsible for doing it. If the OS assignment fails, fall + * back to BIOS settings and try to setup this. + */ + if (boot_cpu_data.x86 == 0x10) + force_ibs_eilvt_setup(); + + if (!ibs_eilvt_valid()) + goto out; get_online_cpus(); ibs_caps = caps; @@ -287,7 +290,11 @@ static __init int amd_ibs_init(void) smp_call_function(setup_APIC_ibs, NULL, 1); put_online_cpus(); - return perf_event_ibs_init(); + ret = perf_event_ibs_init(); +out: + if (ret) + pr_err("Failed to setup IBS, %d\n", ret); + return ret; } /* Since we need the pci subsystem to init ibs we can't do this earlier: */ |