[XS] Change in coreboot[master]: soc/intel/meteorlake: Generate new TME key on each warm boot

[Subrata Banik (Code Review)]

Subrata Banik has submitted this change. ( https://review.coreboot.org/c/coreboot/+/75627?usp=email )

(

11 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
 )Change subject: soc/intel/meteorlake: Generate new TME key on each warm boot
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soc/intel/meteorlake: Generate new TME key on each warm boot

Enable config TME_KEY_REGENERATION_ON_WARM_BOOT for Intel Meteor
Lake SOCs. This config allows Intel FSP to programs TME engine to
generate a new key for each warm boot and exclude CBMEM region
from being encrypted by TME.

Bug=b:276120526
TEST= Boot up the system, generate kernel crash using following
commands:

$ echo 1 > /proc/sys/kernel/sysrq
$ echo "c" > /proc/sysrq-trigger

System performs warm boot automatically. Once it is booted,
execute following commands in linux console of the DUT and confirm
ramoops can be read.

$ cat /sys/fs/pstore/console-ramoops-0

S0ix also tested and found working.

Signed-off-by: Pratikkumar Prajapati 
Change-Id: I3161ab99b83fb7765646be31978942f271ba1f9e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75627
Tested-by: build bot (Jenkins) 
Reviewed-by: Subrata Banik 
Reviewed-by: Kapil Porwal 
---
M src/soc/intel/meteorlake/Kconfig
1 file changed, 1 insertion(+), 0 deletions(-)

Approvals:
  Kapil Porwal: Looks good to me, approved
  build bot (Jenkins): Verified
  Subrata Banik: Looks good to me, approved

diff --git a/src/soc/intel/meteorlake/Kconfig b/src/soc/intel/meteorlake/Kconfig
index 2eb1405..3fa1347 100644
--- a/src/soc/intel/meteorlake/Kconfig
+++ b/src/soc/intel/meteorlake/Kconfig
@@ -89,6 +89,7 @@
    select SOC_INTEL_MEM_MAPPED_PM_CONFIGURATION
    select SSE2
    select SUPPORT_CPU_UCODE_IN_CBFS
+	select TME_KEY_REGENERATION_ON_WARM_BOOT
    select TSC_MONOTONIC_TIMER
    select UDELAY_TSC
    select UDK_202302_BINDING