diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2018-08-06 12:10:10 +0200 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-08-09 08:49:19 +0000 |
| commit | cb5304bc0a64b7d7235e3d48abdb8a4cf499c3a8 (patch) | |
| tree | 3767f562a3e6fee0df5d7e159d7618664e006d96 /src/cpu/intel | |
| parent | 60828b7fa9ad888aee0c7dfff17b5b6a507f2469 (diff) | |
cpu/intel/smm: Make sure SMRR base is aligned to SMRR size
If TSEG_BASE is not TSEG_SIZE aligned the SMRR settings are invalid, therefore
guard against this.
Change-Id: I48f55cdac5f4b16b9a8d7a8ef3a84918e756e315
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/27870
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/cpu/intel')
| -rw-r--r-- | src/cpu/intel/smm/gen1/smmrelocate.c | 34 |
1 files changed, 20 insertions, 14 deletions
diff --git a/src/cpu/intel/smm/gen1/smmrelocate.c b/src/cpu/intel/smm/gen1/smmrelocate.c index b48fe006bc..cf68ecf4c2 100644 --- a/src/cpu/intel/smm/gen1/smmrelocate.c +++ b/src/cpu/intel/smm/gen1/smmrelocate.c @@ -160,20 +160,26 @@ static void fill_in_relocation_params(struct smm_relocation_params *params) if (IS_ENABLED(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM)) params->smram_size -= CONFIG_SMM_RESERVED_SIZE; - /* SMRR has 32-bits of valid address aligned to 4KiB. */ - struct cpuinfo_x86 c; - - /* On model_6fx and model_1067x bits [0:11] on smrr_base are reserved */ - get_fms(&c, cpuid_eax(1)); - if (c.x86 == 6 && (c.x86_model == 0xf || c.x86_model == 0x17)) - params->smrr_base.lo = (params->smram_base & rmask); - else - params->smrr_base.lo = (params->smram_base & rmask) - | MTRR_TYPE_WRBACK; - params->smrr_base.hi = 0; - params->smrr_mask.lo = (~(tseg_size - 1) & rmask) - | MTRR_PHYS_MASK_VALID; - params->smrr_mask.hi = 0; + if (IS_ALIGNED(tsegmb, tseg_size)) { + /* SMRR has 32-bits of valid address aligned to 4KiB. */ + struct cpuinfo_x86 c; + + /* On model_6fx and model_1067x bits [0:11] on smrr_base + are reserved */ + get_fms(&c, cpuid_eax(1)); + if (c.x86 == 6 && (c.x86_model == 0xf || c.x86_model == 0x17)) + params->smrr_base.lo = (params->smram_base & rmask); + else + params->smrr_base.lo = (params->smram_base & rmask) + | MTRR_TYPE_WRBACK; + params->smrr_base.hi = 0; + params->smrr_mask.lo = (~(tseg_size - 1) & rmask) + | MTRR_PHYS_MASK_VALID; + params->smrr_mask.hi = 0; + } else { + printk(BIOS_WARNING, + "TSEG base not aligned with TSEG SIZE! Not setting SMRR\n"); + } } static int install_relocation_handler(int *apic_id_map, int num_cpus, |