diff options
Diffstat (limited to 'src/soc/intel/braswell/cpu.c')
| -rw-r--r-- | src/soc/intel/braswell/cpu.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/soc/intel/braswell/cpu.c b/src/soc/intel/braswell/cpu.c index e648ce04a3..2ab8725818 100644 --- a/src/soc/intel/braswell/cpu.c +++ b/src/soc/intel/braswell/cpu.c @@ -30,6 +30,7 @@ #include <cpu/x86/smm.h> #include <soc/intel/common/memmap.h> #include <reg_script.h> +#include <soc/iosf.h> #include <soc/msr.h> #include <soc/pattrs.h> #include <soc/ramstage.h> @@ -86,6 +87,7 @@ void soc_init_cpus(device_t dev) const struct pattrs *pattrs = pattrs_get(); struct mp_params mp_params; void *default_smm_area; + uint32_t bsmrwac; printk(BIOS_SPEW, "%s/%s ( %s )\n", __FILE__, __func__, dev_name(dev)); @@ -104,6 +106,14 @@ void soc_init_cpus(device_t dev) default_smm_area = backup_default_smm_area(); + /* + * Configure the BUNIT to allow dirty cache line evictions in non-SMM + * mode for the lines that were dirtied while in SMM mode. Otherwise + * the writes would be silently dropped. + */ + bsmrwac = iosf_bunit_read(BUNIT_SMRWAC) | SAI_IA_UNTRUSTED; + iosf_bunit_write(BUNIT_SMRWAC, bsmrwac); + /* Set package MSRs */ reg_script_run(package_msr_script); |