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lib/thread: Switch to using CPU_INFO_V2

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CPU_INFO_V2 changes the behavior of cpu_info(). There is now only 1
cpu_info struct per cpu. This means that we no longer need to allocate
it at the top of each threads stack.

We can now in theory remove the CONFIG_STACK_SIZE alignment on the
thread stack sizes. We can also in theory use threads in SMM if you are
feeling venturesome.

BUG=b:194391185, b:179699789
TEST=Perform reboot stress test on guybrush with COOP_MULTITASKING
enabled.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I5e04d254a00db43714ec60ebed7c4aa90e23190a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57628
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Peers <epeers@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
This commit is contained in:
Raul E Rangel
2021-09-13 14:24:55 -06:00
committed by Raul Rangel
parent b2346a56f1
commit c842c59b3e
2 changed files with 6 additions and 23 deletions
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2
src/Kconfig
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@@ -677,7 +677,7 @@ config TIMER_QUEUE
config COOP_MULTITASKING
def_bool n
depends on TIMER_QUEUE && ARCH_X86
depends on TIMER_QUEUE && ARCH_X86 && CPU_INFO_V2
help
Cooperative multitasking allows callbacks to be multiplexed on the
main thread of ramstage. With this enabled it allows for multiple