diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2018-01-24 17:35:58 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2018-01-25 22:36:54 +0000 |
| commit | f49ddb67de5b6ff86ad080585bd835779521d647 (patch) | |
| tree | 5a97fb507e2388f4bb77cd43b03232539e779255 /src/arch/x86/Kconfig | |
| parent | f70c1bf69a6f1938d39a5a7e7f7679b5e5187e6d (diff) | |
arch/x86: allow timestamp source to not be TSC
Some x86 platforms don't have a TSC that is invariant w.r.t.
rate to get accurate timestamps. As such a different timestamp
is required. Therefore, allow one to specify non-TSC timestamp
source and not compile in the default x86 TSC code.
BUG=b:72378235,b:72170796
Change-Id: I737fcbba60665b3bc2b5864269536fda78b44d90
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/23423
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Justin TerAvest <teravest@chromium.org>
Diffstat (limited to 'src/arch/x86/Kconfig')
| -rw-r--r-- | src/arch/x86/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig index c1390de145..f5bbd7827e 100644 --- a/src/arch/x86/Kconfig +++ b/src/arch/x86/Kconfig @@ -271,3 +271,18 @@ config ACPI_CPU_STRING Sets the ACPI name string in the processor scope as written by the acpigen function. Default is \_PR.CPxx. Note that you need the \ escape character in the string. + +config COLLECT_TIMESTAMPS_NO_TSC + bool + default n + depends on COLLECT_TIMESTAMPS + help + Use a non-TSC platform-dependent source for timestamps. + +config COLLECT_TIMESTAMPS_TSC + bool + default y if !COLLECT_TIMESTAMPS_NO_TSC + default n + depends on COLLECT_TIMESTAMPS + help + Use the TSC as the timestamp source. |