From 1c6eb075a3fd31f3a22d72f11abc0b15c5776f1d Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 8 Apr 2019 13:20:52 -0600 Subject: [PATCH] Convert CONFIG_TRACE_BUFFER_SIZE et al to Kconfig This converts the following to Kconfig: CONFIG_TRACE_BUFFER_SIZE CONFIG_TRACE_EARLY_SIZE CONFIG_TRACE_EARLY CONFIG_TRACE_EARLY_ADDR Signed-off-by: Simon Glass --- lib/Kconfig | 48 ++++++++++++++++++++++++++++++++++++ lib/trace.c | 3 ++- scripts/config_whitelist.txt | 4 --- 3 files changed, 50 insertions(+), 5 deletions(-) diff --git a/lib/Kconfig b/lib/Kconfig index a3352a4fa1..05f82d4a50 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -174,6 +174,54 @@ config TRACE memory for exporting for analysis (e.g. using bootchart). See doc/README.trace for full details. +config TRACE_BUFFER_SIZE + hex "Size of trace buffer in U-Boot" + depends on TRACE + default 0x01000000 + help + Sets the size of the trace buffer in U-Boot. This is allocated from + memory during relocation. If this buffer is too small, the trace + history will be truncated, with later records omitted. + + If early trace is enabled (i.e. before relocation), this buffer must + be large enough to include all the data from the early trace buffer as + well, since this is copied over to the main buffer during relocation. + + A trace record is emitted for each function call and each record is + 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If + the size is too small then 'trace stats' will show a message saying + how many records were dropped due to buffer overflow. + +config TRACE_EARLY + bool "Enable tracing before relocation" + depends on TRACE + help + Sometimes it is helpful to trace execution of U-Boot before + relocation. This is possible by using a arch-specific, fixed buffer + position in memory. Enable this option to start tracing as early as + possible after U-Boot starts. + +config TRACE_EARLY_SIZE + hex "Size of early trace buffer in U-Boot" + depends on TRACE_EARLY + default 0x00100000 + help + Sets the size of the early trace buffer in bytes. This is used to hold + tracing information before relocation. + +config TRACE_EARLY_ADDR + hex "Address of early trace buffer in U-Boot" + depends on TRACE_EARLY + default 0x00100000 + help + Sets the address of the early trace buffer in U-Boot. This memory + must be accessible before relocation. + + A trace record is emitted for each function call and each record is + 12 bytes (see struct trace_call). A suggested minimum size is 1MB. If + the size is too small then the message which says the amount of early + data being coped will the the same as the + source lib/dhry/Kconfig menu "Security support" diff --git a/lib/trace.c b/lib/trace.c index fb7658b112..9956442fef 100644 --- a/lib/trace.c +++ b/lib/trace.c @@ -296,7 +296,8 @@ int __attribute__((no_instrument_function)) trace_init(void *buff, trace_enabled = 0; hdr = map_sysmem(CONFIG_TRACE_EARLY_ADDR, CONFIG_TRACE_EARLY_SIZE); - end = (char *)&hdr->ftrace[hdr->ftrace_count]; + end = (char *)&hdr->ftrace[min(hdr->ftrace_count, + hdr->ftrace_size)]; used = end - (char *)hdr; printf("trace: copying %08lx bytes of early data from %x to %08lx\n", used, CONFIG_TRACE_EARLY_ADDR, diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt index 2942c6945b..3e6bdf8161 100644 --- a/scripts/config_whitelist.txt +++ b/scripts/config_whitelist.txt @@ -4401,10 +4401,6 @@ CONFIG_TMU_TIMER CONFIG_TPL_PAD_TO CONFIG_TPM_TIS_BASE_ADDRESS CONFIG_TPS6586X_POWER -CONFIG_TRACE_BUFFER_SIZE -CONFIG_TRACE_EARLY -CONFIG_TRACE_EARLY_ADDR -CONFIG_TRACE_EARLY_SIZE CONFIG_TRAILBLAZER CONFIG_TRATS CONFIG_TSEC -- 2.25.1