Add build rules to build amdfwread tool. Also mark this as a dependency
either while building tools or amdfw.rom.
BUG=None
TEST=Build and boot to OS in Skyrim with CBFS verification enabled.
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Change-Id: I3fee4e4c77f62bb2840270b3eaaa58b894780d75
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66939
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Upcoming AMD SoCs use recovery A/B layout. Update amdfwread tool to
handle it.
Also add a generic read_header function to read different header types.
BUG=None
TEST=Run amdfwread tool against both Skyrim and Guybrush BIOS images to
dump the Softfuse entry.
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Change-Id: I6576eaebc611ab338885aed2ee087bf85da3ca15
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66554
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Optional arguments that involve printing information from the firmware
image is mapped to bit fields with bit 31 set. But instead of just
setting bit 31, bits 27 - 31 are set. Fix AMDFW_OPT* bit mask.
BUG=None
TEST=Build and use amdfwread to read the Soft-fuse bits from Guybrush
BIOS image. Observed no changes before and after the changes.
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Change-Id: I0d88669bace45f3332c5e56527516b2f38295a48
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66573
Reviewed-by: Robert Zieba <robertzieba@google.com>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
* AMD_ADDR_PHYSICAL refers to physical address in the memory map
* AMD_ADDR_REL_BIOS is relative to the start of the BIOS image
* AMD_ADDR_REL_TAB is relative to the start of concerned PSP or BIOS
tables
Update the relative_offset implementation accordingly. Though
AMD_ADDR_REL_SLOT is defined it is not used. Removing that to simplify
the relative_offset implementation so that it can be used for both PSP
and BIOS firmware tables. Hence update the relative_offset function
signature as well.
BUG=None
TEST=Build and use amdfwread to read the Soft-fuse bits from Guybrush
BIOS image. Observed no changes before and after the changes.
Change-Id: I74603dd08eda87393c14b746c4435eaf2bb34126
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66572
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Only edk2 used this to fill in a different struct but even there the
entries go unused, so removing this struct element from coreboot has
no side effects.
Change-Id: Iadd2678c4e01d30471eac43017392d256adda341
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68767
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Bill XIE <persmule@hardenedlinux.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Select SOC_INTEL_RAPTORLAKE to force coreboot to use the RPL FSP headers
for FSP as kano is using a converged firmware image.
BUG=b:253337338
BRANCH=firmware-brya-14505.B
TEST=Cherry-pick Cq-Depends, then "FW_NAME=kano emerge-brya
coreboot-private-files-baseboard-brya coreboot chromeos-bootimage",
disable hardware write protect and software write protect,
flash and boot kano in end-of-manufacturing mode to kernel.
Cq-Depend: chrome-internal:5046060, chromium:3967356
Change-Id: I75da3af530e0eafdc684f19ea0f6674f6dc10f01
Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68626
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
The Atlas board has currently the problem that suspending the System
causes the System to freeze. Therefore disable S3, until the cause is
figured out and fixed.
Change-Id: I5b28787df9b01683fcd4a1de8267840a80bb4fe6
Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68591
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This patch moves DRIVERS_INTEL_USB4_RETIMER config from Meteor Lake
SoC to Rex mainboard to maintain the symmetry with previous
generation ChromeOS devices (Brya and Volteer).
BUG=none
TEST=Able to build and boot to Google/Rex with USB4 functionality
remaining intact.
Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I38360f6f1f2fcb4b0315de93c68f00d77e63003c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68771
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Pre-sandy bridge hardware is likely affected by the sinkhole
vulnerability. Intel sandy bridge and newer has hardware mitigations
against this attack according to
https://github.com/xoreaxeaxeax/sinkhole.
Change-Id: I52cb20e0edac62475597b31696f38d0ffc6080de
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37321
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This adds the initial framework for the Glinda SoC, based on what's been
done for Morgana already.
I believe that there's more that can be made common, but that work will
continue as both platforms are developed.
Signed-off-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
Change-Id: I43d0fdb711c441dc410a14f6bb04b808abefe920
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68684
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Add system agent ID for RPL QDF# Q271
TEST=Tested by ODM and "MCH: device id a71b (rev 01) is Unknown" msg is
gone
Signed-off-by: Lawrence Chang <lawrence.chang@intel.corp-partner.google.com>
Change-Id: I6fd51d9915aa59d012c73abc2477531643655e54
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68565
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Kane Chen <kane.chen@intel.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Move the Raydium touchscreen to the baseboard devicetree. Since only the
liara variant uses a level IRQ as I2C devices are supposed to, all other
board variants still override this to use an edge IRQ which were added
as a workaround to make the touchscreen work on the other devices. Right
now it's unclear to me if that edge IRQ workaround was only needed
temporarily and can now be removed, so I'll keep it as it was for now.
If this turns out to be no longer needed on the other variants, the
overrides can be dropped in the future.
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ic621c1a5856e9e280a25b0668010a1ee5bbb61e4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68770
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Add a post-code call that SoCs can hook to output or save in any way
that is specific to that SoC.
Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I0369e4362840d7506d301105d8e1e2fd865919f4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68545
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
PS2K device needs to be under PCI0, not LPCB, for Windows to
recognize it. Same change was made to ChromeEC previously.
Test: Boot Win11 on Drallion, verify built-in keyboard functional.
Change-Id: I12019592dfa1d869ba57c1ff6c25ac6bdeb7a300
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68463
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
When CONFIG_DEBUG_SMI is enabled SMM handler performs console hardware
initialization that may interfere with OS. Here we store the state
before console initialization and restore state before SMM exit.
Tested=On not public yet system, after exiting smm, uart console can
still work well.
Signed-off-by: Tim Chu <Tim.Chu@quantatw.com>
Change-Id: Ifa5042c24f0e3217a75971d9e6067b1d1f56a484
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68567
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Zhang <jonzhang@fb.com>
Interrupt Identification Register (IIR) is a I/O read-access register.
Add definition of FIFO enabled for this register so that we can check
whether FIFO is enabled or not.
Signed-off-by: Tim Chu <Tim.Chu@quantatw.com>
Change-Id: I12e8566822693004418cf83cae466dc3e2d612c4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68566
Reviewed-by: Jonathan Zhang <jonzhang@fb.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
The Shimlayer recipe requires OBJCOPY, so declare it at the top of
the Makefile so this recipe works as intended.
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: I2e04dfe18df6252261836dcdf98f7e8de65287b5
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68744
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
After some measurements it turned out that Elkhart Lake uses a higher
CSR clock internally from which the MDIO clock is derived. In order to
stay compliant with the specification, the MDIO clock needs to be lower
than 2.5 MHz. Therefore, the divider needs to be 102 and not 62.
This patch changes the define to match the new divider value and uses
this new define at the appropriate place.
Test=Measure the MDIO clock rate on mc_ehl2 which results in 2 MHz.
Change-Id: Idf498c3547530dfa395f54488ef244e787062e34
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68669
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
The highly real time driven application executed on mc_ehl1 has shown
that the L1 prefetcher on Elkhart Lake is too aggressive which in the
end leads to an increased number of cache misses. Disabling the L1
prefetcher boosts up the performance (in some cases by more than 10 %)
in this specific use case.
Change-Id: Id09a7f8f812707cd05bd5e3b530e5c3ad8067b16
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68668
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Depending on the real workload that is executed on the system the L1
prefetcher might be too aggressive and will populate the L1 cache ahead
with data that is not really needed. In the end, this will result in a
higher cache miss rate thus slowing down the real application.
This patch provides a devicetree option to disable the L1 prefetcher if
needed. This can be requested on mainboard level if needed.
Change-Id: I3fc8fb79c42c298a20928ae4912ee23916463038
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68667
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
For MT8188, the SPDX identifiers are all GPL-2.0-only OR MIT, so
replace "GPL-2.0-only" with "GPL-2.0-only OR MIT".
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Change-Id: I5ef6c488b7ef937f6e298670ea75d306b9fe7491
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68759
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
- For display, only vdosys0_pwr_con and edp_tx_pwr_con settings are
required.
- For audio, it requires powering on adsp_ao_pwr_con,
adsp_infra_pwr_con and audio_pwr_con.
- Add new power domain data `ext_buck_iso_bits` for buck isolation
control.
BUG=b:244208960
TEST=access display registers successfully.
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Change-Id: I7f00bda0cc5c7f8dea55a564a0ff10ae601115b3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68489
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
The SPM register at offset 0x0 is often named as poweron_config_set in
previous MediaTek SoCs. To use common driver, we rename it from
poweron_config_en to poweron_config_set.
BUG=none
TEST=emerge-geralt coreboot.
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Change-Id: I31dbf09d668844d3ee74790c657a2ab076e8cdf0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68486
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
MT8195 supports 2P mode and MT8188 supports 1P mode. A new struct
member `input_mode` is added to `struct mtk_dpintf` for
differentiation. We also move SoC-specific data `dpintf_data` to soc
folder.
BUG=b:244208960
TEST=emerge-cherry coreboot.
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Change-Id: I6d138b0ff75e005518bc8fcce06df20924b2a6ba
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68485
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
DP drivers can be shared for both MT8195 and MT8188, so move them to
common folder.
BUG=b:244208960
TEST=emerge-cherry coreboot.
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Change-Id: Ic80c03aa6b13e6c9c39fd63b5c1c1cbdbe93a7c4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68484
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Always detecting the presence of the ELAN touchpad doesn't affect the
functionality, but allows dropping the override for all variants that
have multiple touchpad options.
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Id5d14eedd5d95dd0990ae56775daed9284c03717
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68672
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
This helps with deduplicating the identical parts of the variants'
devicetrees.
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ie050c4624327b904e8cb0959b40421339e43f825
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68634
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Enable SSE2 (and SSE) when compiling for x86_64. Compilers often assume
SSE2 is present and enabled when targeting x86_64.
This fixes:
- lzma decompression code is compiled with the -Ofast flag
- 'everything' when compiling with clang.
This mostly affects qemu targets, which did not have this flag selected
yet.
TESTED on qemu.
Change-Id: I3cdc584c97016e15513df663a54a7bdb549a73e4
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44869
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
For some nissa variants, there are build configurations that need to use
different blobs, but otherwise are identical. Currently, they use the
same choice of board config and configure blob paths appropriately. This
avoids duplication within the Kconfig file, but the resulting firmware
images can be difficult to distinguish, since they report the same
FRID.
Add a prompt string for MAINBOARD_PART_NUMBER so it can be overridden
and round-tripped through make oldconfig, allowing customisation of the
reported FRID and other MAINBOARD_PART_NUMBER-derived values with
minimal overhead.
BUG=b:253966060
BRANCH=None
TEST=CL:3960290 MAINBOARD_PART_NUMBER configs apply successfully
Signed-off-by: Sam McNally <sammc@chromium.org>
Change-Id: I3497d7fa1c04c8fa2592025c771d9dbc65632e6e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68496
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Reka Norman <rekanorman@chromium.org>
Parallel Port has LDN 1 and Serial Pot has LDN 2. Fix typo made in the
patch adding register definitions for NCT6687D Super I/O chip.
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: If850d2a0a03bd41e3d855f347fd182831bcfcdca
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68710
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
This is the enum value to initialize the Smart Trace Buffer's
Spill-to-DRAM feature. More information on how this is used is
available in the STB Linux kernel driver.
Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: Iab2e5fb121902959ddd0e7c8cca930a327b69291
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68686
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Fix "bad revision" error when we run "update_submodules" with no option.
This adds "origin/trunk" branch name for "util/goswid".
Change-Id: Ie84d40fa00c6d0032b93917ad96e60120388eab5
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68650
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
We've seen failures because the binaries were not being built into the
image. In particular, the APCB is modified by the coreboot build
process, so if the APCB isn't built correctly to support the correct
number of SPDs, the build can fail.
The mendocino FSP binaries are not yet pushed, so the build is currently
pointing at the cezanne binaries. The mendocino FSP will be pushed when
the mendocino chips are released for sale.
Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I31d11c5327416f4339930373c447531ae9f79d28
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68320
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jon Murphy <jpmurphy@google.com>
Update the MCA bank names for morgana per PPR #57396, rev 1.52
Signed-off-by: Fred Reitberger <reitbergerfred@gmail.com>
Change-Id: If0082bd5362bdead3f9dc693d1e338e8cda224f0
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68683
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Pentium CPU will use 150W adaptor, this change revises PsysPL2 to 150W
based on fw_config.
BUG=b:253542746
TEST=Check CPU PsysPL2=150W in AP log with Pentium CPU.
Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Change-Id: I63b2a9d79454b20b60ba1317a8eebb3c10eff9d6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68665
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
SaGv is enabled for all brya variants, so it should be harmless
to enable it for brask variants to save some power.
BUG=254374912
TEST=Build and boot to Chrome OS
Signed-off-by: Derek Huang <derekhuang@google.com>
Change-Id: Ib5d1e39b3f901606e2f1449e4ed40d53696562ed
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68646
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
The touchscreen IRQ has been configured as LEVEL_LOW in skyrim projects.
Therefore, update the gpio.c to be consistent with the configuration.
BUG=b:253506651, b:251367588
BRANCH=None
TEST=FW_NAME=frostflow emerge-skyrim coreboot
Signed-off-by: Frank Wu <frank_wu@compal.corp-partner.google.com>
Change-Id: Iccfe5b01f10899c43151762e4730a05990afa602
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68638
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Chao Gui <chaogui@google.com>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
For recent X86 CPUs, the 0x15 CPUID instruction will return Time Stamp
Counter Frequence. For CPUs that do not support this instruction, EDK2
must include a different library which is the reason why this must be
configured at build time.
If this is enabled, and the CPU doesn't support 0x15, it will fail to
boot. If is not enabled, and the CPU does support 0x15, it will still
boot but without support for the leaf. Consequently, disabled it by
default.
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: I4f0f43ce50c4f6f7eb03063fff34d015468f6daa
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65950
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Karthikeyan Ramasubramanian