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soc/intel/cmn/lockdown: Perform SA lockdown configuration

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`sa_lockdown_cfg` function ensures locking the PAM register hence,
skip dedicated calling into `sa_lock_pam()` from the SoC
`finalize.c` file. Dropped sa_lock_pam() call from ADL/CNL/EHL/JSL
and TGL.

Additionally, this patch enforces SA lockdown configuration for SKL
and ICL as well.

BUG=b:211954778
TEST=Able to build google/brya with these changes.

> localhost ~ # lspci -xxx | less
00:00.0 Host bridge: Device 8086:4601 (rev 04)

Bit 0 for all PAM registers a.k.a, PAMx_0_0_0_PCI.LOCK bit is set
(meaning locked).

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: Ibd464d2507393ed0c746eb1fbd10e36092ed5599
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63518
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
This commit is contained in:
Subrata Banik
2022-04-22 19:48:40 +05:30
committed by Felix Held
parent 0231ab1761
commit 2b594816ea
6 changed files with 13 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/soc/intel/elkhartlake/finalize.c
View File

@@ -11,7 +11,6 @@
#include <intelblocks/pmclib.h>
#include <intelblocks/systemagent.h>
#include <intelblocks/tco.h>
#include <intelpch/lockdown.h>
#include <soc/p2sb.h>
#include <soc/pci_devs.h>
#include <soc/pcr_ids.h>
@@ -31,19 +30,12 @@ static void pch_finalize(void)
pmc_clear_pmcon_sts();
}
static void sa_finalize(void)
{
if (get_lockdown_config() == CHIPSET_LOCKDOWN_COREBOOT)
sa_lock_pam();
}
static void soc_finalize(void *unused)
{
printk(BIOS_DEBUG, "Finalizing chipset.\n");
pch_finalize();
apm_control(APM_CNT_FINALIZE);
sa_finalize();
/* Indicate finalize step with post code */
post_code(POST_OS_BOOT);