diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2018-01-23 10:53:05 -0700 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-01-24 16:27:03 +0000 |
| commit | 24079323d4d83db4ce0ff0646309bd644b53aa76 (patch) | |
| tree | 9f77bd4d4bb399ad895016c24bdb78e90b6e2383 /src/soc/amd/stoneyridge/Kconfig | |
| parent | 137484dee70b378ee557de4e6bbe59716e4791f0 (diff) | |
| download | coreboot-24079323d4d83db4ce0ff0646309bd644b53aa76.tar.xz | |
soc/amd/stoneyridge: provide alternate monotonic timer
The TSC has been observed to be ticking at a non-constant rate
in early boot. The root cause is still not known, but this
misbehavior necessitates an alternative monotonic timer source.
Use the perf TSC which ticks at 100 MHz. This also means the
timestamp table is not accurate as well. Root cause of TSC rate
instability needs to be resolved in order to fix that.
BUG=b:72170796
Change-Id: Ie052169868a9d9f25f8cc0ce8dd8251b560e671f
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/23397
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Justin TerAvest <teravest@chromium.org>
Diffstat (limited to 'src/soc/amd/stoneyridge/Kconfig')
| -rw-r--r-- | src/soc/amd/stoneyridge/Kconfig | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/src/soc/amd/stoneyridge/Kconfig b/src/soc/amd/stoneyridge/Kconfig index 51573fe34f..4f07db8a39 100644 --- a/src/soc/amd/stoneyridge/Kconfig +++ b/src/soc/amd/stoneyridge/Kconfig @@ -39,7 +39,6 @@ config CPU_SPECIFIC_OPTIONS select HAVE_HARD_RESET select UDELAY_TSC select HAVE_MONOTONIC_TIMER - select TSC_MONOTONIC_TIMER select TSC_CONSTANT_RATE select SPI_FLASH if HAVE_ACPI_RESUME select TSC_SYNC_LFENCE |