diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2020-10-14 09:51:29 +0200 |
|---|---|---|
| committer | Philipp Deppenwiese <zaolin.daisuki@gmail.com> | 2020-10-15 08:33:23 +0000 |
| commit | 7af8aca2460c5ad138484bc3f37891fac454d8b1 (patch) | |
| tree | a390d858385eec12a635831d81f6aae3ec14927a /src/security | |
| parent | 4b290b7b6f763f369b78cb83054e6ad65d83c4a3 (diff) | |
sec/intel/txt/getsec_enteraccs.S: Save and restore MTRR_DEF_TYPE
This needs to be saved and restored, otherwise the BSP might have an
inconsistent MTRR setup with regards to the AP's which results in
weird errors and slowdowns in the operating system.
TESTED: Fixes booting OCP/Deltalake with Linux 5.8.
Change-Id: Iace636ec6fca3b4d7b2856f0f054947c5b3bc8de
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46375
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/security')
| -rw-r--r-- | src/security/intel/txt/getsec_enteraccs.S | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/src/security/intel/txt/getsec_enteraccs.S b/src/security/intel/txt/getsec_enteraccs.S index 3135de79b2..563dc08a15 100644 --- a/src/security/intel/txt/getsec_enteraccs.S +++ b/src/security/intel/txt/getsec_enteraccs.S @@ -58,6 +58,7 @@ getsec_enteraccs: /* Reserve space on stack for GDT */ subl $8, %esp + PUSH_MSR MTRR_DEF_TYPE_MSR PUSH_MSR IA32_MISC_ENABLE PUSH_MSR MTRR_FIX_64K_00000 PUSH_MSR MTRR_FIX_16K_80000 @@ -290,12 +291,7 @@ cond_pop_var_mtrrs: POP_MSR MTRR_FIX_16K_80000 POP_MSR MTRR_FIX_64K_00000 POP_MSR IA32_MISC_ENABLE - - /* Enable fixed MTRRs */ - movl $(MTRR_DEF_TYPE_MSR), %ecx - rdmsr - orl $(MTRR_DEF_TYPE_FIX_EN), %eax - wrmsr + POP_MSR MTRR_DEF_TYPE_MSR /* Enable cache */ movl %cr0, %eax |