From 8b5d8f3150216e1b671456b60be20a3456262a0d Mon Sep 17 00:00:00 2001 From: Luming Yu Date: Fri, 29 Sep 2017 22:10:41 +0800 Subject: [PATCH v1 8/9] early pt: enable cyc packet enable CYC packet Signed-off-by: Luming Yu --- arch/x86/events/intel/early_pt.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/x86/events/intel/early_pt.c b/arch/x86/events/intel/early_pt.c index 645d2ca..95225d6 100644 --- a/arch/x86/events/intel/early_pt.c +++ b/arch/x86/events/intel/early_pt.c @@ -58,6 +58,7 @@ static unsigned addr_range_num = 0; static int mtc_freq = 0; static int psb_freq = 0; +static int cyc_thresh = 0; static unsigned long pt_addr0_start = 0, pt_addr0_end = 0; static unsigned long pt_addr1_start = 0, pt_addr1_end = 0; @@ -206,6 +207,9 @@ static int start_early_pt(void *arg) if (psb_freq && ((1U << (psb_freq - 1)) & psb_freq_mask)) val |= (psb_freq -1) << 24; + if (cyc_thresh && ((1U << (cyc_thresh-1)) & cyc_thresh_mask)) + val |= ((cyc_thresh -1) << 19) | CYC_EN; + if (wrmsrl_safe(MSR_IA32_RTIT_CTL, val) < 0) { pr_info("early_pt start failed on cpu[%d]\n", cpu); __this_cpu_write(early_pt_running, false); @@ -424,3 +428,9 @@ static int __init early_pt_psb_freq_setup(char *arg) return 0; } early_param("psb_freq", early_pt_psb_freq_setup); +static int __init early_pt_cyc_thresh_setup(char *arg) +{ + sscanf(arg, "%d", &cyc_thresh); + return 0; +} +early_param("cyc_thresh", early_pt_cyc_thresh_setup); -- 2.7.5