From 192581fb368c74307ab89506af03aeb997a9c50a Mon Sep 17 00:00:00 2001 From: Luming Yu Date: Fri, 29 Sep 2017 22:08:33 +0800 Subject: [PATCH v1 5/9] early pt: basic addr pair filter support (addr0 && addr1) Signed-off-by: Luming Yu --- arch/x86/events/intel/early_pt.c | 45 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/arch/x86/events/intel/early_pt.c b/arch/x86/events/intel/early_pt.c index 36b80b1..5335458 100644 --- a/arch/x86/events/intel/early_pt.c +++ b/arch/x86/events/intel/early_pt.c @@ -56,6 +56,9 @@ static unsigned cyc_thresh_mask = 0; static unsigned mtc_freq_mask = 0; static unsigned addr_range_num = 0; +static unsigned long pt_addr0_start = 0, pt_addr0_end = 0; +static unsigned long pt_addr1_start = 0, pt_addr1_end = 0; + static int early_pt_buffer_init(int cpu) { u64 pt_buffer; @@ -180,6 +183,20 @@ static int start_early_pt(void *arg) val |= RTIT_CTL_OS; val |= RTIT_CTL_USR; + { + int num = addr_range_num; + if (num-- && pt_addr0_start && (pt_addr0_start <= pt_addr0_end)) { + val |= ((u64) 0x1 << ADDR0_SHIFT); + wrmsrl_safe(MSR_IA32_RTIT_ADDR0_A, pt_addr0_start); + wrmsrl_safe(MSR_IA32_RTIT_ADDR0_B, pt_addr0_end); + } + if (num-- && pt_addr1_start && (pt_addr1_start <= pt_addr1_end)) { + val |= ((u64) 0x1 << ADDR1_SHIFT); + wrmsrl_safe(MSR_IA32_RTIT_ADDR1_A, pt_addr1_start); + wrmsrl_safe(MSR_IA32_RTIT_ADDR1_B, pt_addr1_end); + } + } + 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); @@ -356,3 +373,31 @@ static int __init early_pt_buf_len_setup(char *str) return 0; } early_param("early_pt_buf_len", early_pt_buf_len_setup); + +static int __init early_pt_addr0_start_setup(char *arg) +{ + sscanf(arg, "%lx", &pt_addr0_start); + pr_info("pt_addr0_start = %lx\n", pt_addr0_start); + return 0; +} +early_param("early_pt_addr0_start", early_pt_addr0_start_setup); +static int __init early_pt_addr0_end_setup(char *arg) +{ + sscanf(arg, "%lx", &pt_addr0_end); + pr_info("pt_addr0_end = %lx\n", pt_addr0_end); + return 0; +} +early_param("early_pt_addr0_end", early_pt_addr0_end_setup); + +static int __init early_pt_addr1_start_setup(char *arg) +{ + sscanf(arg, "%lu", &pt_addr1_start); + return 0; +} +early_param("early_pt_addr1_start", early_pt_addr1_start_setup); +static int __init early_pt_addr1_end_setup(char *arg) +{ + sscanf(arg, "%lu", &pt_addr1_end); + return 0; +} +early_param("early_pt_addr1_end", early_pt_addr1_end_setup); -- 2.7.5