Patch set updated for coreboot: soc/intel/baytrail: convert to using common MP and SMM init
Aaron Durbin (adurbin@chromium.org) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/14580
-gerrit
commit 283f74fafab941048435f33bcbae90018256d806 Author: Aaron Durbin adurbin@chromium.org Date: Tue May 3 11:12:52 2016 -0500
soc/intel/baytrail: convert to using common MP and SMM init
In order to reduce duplication of code use the common MP and SMM initialization flow.
Change-Id: I5c5d678d7adb4c489752cca80b20f785ec8749d4 Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/soc/intel/baytrail/cpu.c | 262 ++++++++++++++----------------------------- 1 file changed, 87 insertions(+), 175 deletions(-)
diff --git a/src/soc/intel/baytrail/cpu.c b/src/soc/intel/baytrail/cpu.c index fd9c7fb..94c3f2b 100644 --- a/src/soc/intel/baytrail/cpu.c +++ b/src/soc/intel/baytrail/cpu.c @@ -32,36 +32,6 @@ #include <soc/ramstage.h> #include <soc/smm.h>
-static void smm_relocate(void); -static void enable_smis(void); - -static struct mp_flight_record mp_steps[] = { - MP_FR_BLOCK_APS(smm_relocate, smm_relocate), - MP_FR_BLOCK_APS(mp_initialize_cpu, mp_initialize_cpu), - /* Wait for APs to finish initialization before proceeding. */ - MP_FR_BLOCK_APS(NULL, enable_smis), -}; - -/* The APIC id space on Bay Trail is sparse. Each id is separated by 2. */ -static int adjust_apic_id(int index, int apic_id) -{ - return 2 * index; -} - -/* Package level MSRs */ -const struct reg_script package_msr_script[] = { - /* Set Package TDP to ~7W */ - REG_MSR_WRITE(MSR_PKG_POWER_LIMIT, 0x3880fa), - REG_MSR_RMW(MSR_PP1_POWER_LIMIT, ~(0x7f << 17), 0), - REG_MSR_WRITE(MSR_PKG_TURBO_CFG1, 0x702), - REG_MSR_WRITE(MSR_CPU_TURBO_WKLD_CFG1, 0x200b), - REG_MSR_WRITE(MSR_CPU_TURBO_WKLD_CFG2, 0), - REG_MSR_WRITE(MSR_CPU_THERM_CFG1, 0x00000305), - REG_MSR_WRITE(MSR_CPU_THERM_CFG2, 0x0405500d), - REG_MSR_WRITE(MSR_CPU_THERM_SENS_CFG, 0x27), - REG_SCRIPT_END -}; - /* Core level MSRs */ const struct reg_script core_msr_script[] = { /* Dynamic L2 shrink enable and threshold, clear SINGLE_PCTL bit 11 */ @@ -74,48 +44,6 @@ const struct reg_script core_msr_script[] = { REG_SCRIPT_END };
-void baytrail_init_cpus(device_t dev) -{ - struct bus *cpu_bus = dev->link_list; - const struct pattrs *pattrs = pattrs_get(); - struct mp_params mp_params; - uint32_t bsmrwac; - void *default_smm_area; - - /* Set up MTRRs based on physical address size. */ - x86_setup_mtrrs_with_detect(); - x86_mtrr_check(); - - mp_params.num_cpus = pattrs->num_cpus, - mp_params.parallel_microcode_load = 1, - mp_params.adjust_apic_id = adjust_apic_id; - mp_params.flight_plan = &mp_steps[0]; - mp_params.num_records = ARRAY_SIZE(mp_steps); - mp_params.microcode_pointer = pattrs->microcode_patch; - - 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); - - /* Enable Turbo Mode on BSP and siblings of the BSP's building block. */ - enable_turbo(); - - if (mp_init(cpu_bus, &mp_params)) { - printk(BIOS_ERR, "MP initialization failure.\n"); - } - - restore_default_smm_area(default_smm_area); -} - static void baytrail_core_init(device_t cpu) { printk(BIOS_DEBUG, "Init BayTrail core.\n"); @@ -151,7 +79,7 @@ static const struct cpu_driver driver __cpu_driver = {
/* - * SMM loading and initialization. + * MP and SMM loading initialization. */
struct smm_relocation_attrs { @@ -162,98 +90,55 @@ struct smm_relocation_attrs {
static struct smm_relocation_attrs relo_attrs;
-static void adjust_apic_id_map(struct smm_loader_params *smm_params) -{ - int i; - struct smm_runtime *runtime = smm_params->runtime; - - for (i = 0; i < CONFIG_MAX_CPUS; i++) - runtime->apic_id_to_cpu[i] = mp_get_apic_id(i); -} - -static void asmlinkage cpu_smm_do_relocation(void *arg) -{ - msr_t smrr; - em64t100_smm_state_save_area_t *smm_state; - const struct smm_module_params *p; - const struct smm_runtime *runtime; - int cpu; - - p = arg; - runtime = p->runtime; - cpu = p->cpu; - - if (cpu >= CONFIG_MAX_CPUS) { - printk(BIOS_CRIT, - "Invalid CPU number assigned in SMM stub: %d\n", cpu); - return; - } - - /* Set up SMRR. */ - smrr.lo = relo_attrs.smrr_base; - smrr.hi = 0; - wrmsr(SMRR_PHYS_BASE, smrr); - smrr.lo = relo_attrs.smrr_mask; - smrr.hi = 0; - wrmsr(SMRR_PHYS_MASK, smrr); - - /* The relocated handler runs with all CPUs concurrently. Therefore - * stagger the entry points adjusting SMBASE downwards by save state - * size * CPU num. */ - smm_state = (void *)(SMM_EM64T100_SAVE_STATE_OFFSET + runtime->smbase); - smm_state->smbase = relo_attrs.smbase - cpu * runtime->save_state_size; - printk(BIOS_DEBUG, "New SMBASE 0x%08x\n", smm_state->smbase); -} +/* Package level MSRs */ +static const struct reg_script package_msr_script[] = { + /* Set Package TDP to ~7W */ + REG_MSR_WRITE(MSR_PKG_POWER_LIMIT, 0x3880fa), + REG_MSR_RMW(MSR_PP1_POWER_LIMIT, ~(0x7f << 17), 0), + REG_MSR_WRITE(MSR_PKG_TURBO_CFG1, 0x702), + REG_MSR_WRITE(MSR_CPU_TURBO_WKLD_CFG1, 0x200b), + REG_MSR_WRITE(MSR_CPU_TURBO_WKLD_CFG2, 0), + REG_MSR_WRITE(MSR_CPU_THERM_CFG1, 0x00000305), + REG_MSR_WRITE(MSR_CPU_THERM_CFG2, 0x0405500d), + REG_MSR_WRITE(MSR_CPU_THERM_SENS_CFG, 0x27), + REG_SCRIPT_END +};
-static int install_relocation_handler(int num_cpus) +static void pre_mp_init(void) { - const int save_state_size = sizeof(em64t100_smm_state_save_area_t); + uint32_t bsmrwac;
- struct smm_loader_params smm_params = { - .per_cpu_stack_size = save_state_size, - .num_concurrent_stacks = num_cpus, - .per_cpu_save_state_size = save_state_size, - .num_concurrent_save_states = 1, - .handler = (smm_handler_t)&cpu_smm_do_relocation, - }; + /* Set up MTRRs based on physical address size. */ + x86_setup_mtrrs_with_detect(); + x86_mtrr_check();
- if (smm_setup_relocation_handler(&smm_params)) - return -1; + /* + * 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);
- adjust_apic_id_map(&smm_params); + /* Set package MSRs */ + reg_script_run(package_msr_script);
- return 0; + /* Enable Turbo Mode on BSP and siblings of the BSP's building block. */ + enable_turbo(); }
-static int install_permanent_handler(int num_cpus) +static int get_cpu_count(void) { - /* There are num_cpus concurrent stacks and num_cpus concurrent save - * state areas. Lastly, set the stack size to the save state size. */ - int save_state_size = sizeof(em64t100_smm_state_save_area_t); - struct smm_loader_params smm_params = { - .per_cpu_stack_size = save_state_size, - .num_concurrent_stacks = num_cpus, - .per_cpu_save_state_size = save_state_size, - .num_concurrent_save_states = num_cpus, - }; - const int tseg_size = smm_region_size() - CONFIG_SMM_RESERVED_SIZE; - - printk(BIOS_DEBUG, "Installing SMM handler to 0x%08x\n", - relo_attrs.smbase); - - if (smm_load_module((void *)relo_attrs.smbase, tseg_size, &smm_params)) - return -1; - - adjust_apic_id_map(&smm_params); - - return 0; + const struct pattrs *pattrs = pattrs_get(); + + return pattrs->num_cpus; }
-static int smm_load_handlers(void) +static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, + size_t *smm_save_state_size) { /* All range registers are aligned to 4KiB */ const uint32_t rmask = ~((1 << 12) - 1); - const struct pattrs *pattrs = pattrs_get();
/* Initialize global tracking state. */ relo_attrs.smbase = (uint32_t)smm_region_start(); @@ -261,36 +146,29 @@ static int smm_load_handlers(void) relo_attrs.smrr_mask = ~(smm_region_size() - 1) & rmask; relo_attrs.smrr_mask |= MTRR_PHYS_MASK_VALID;
- /* Install handlers. */ - if (install_relocation_handler(pattrs->num_cpus) < 0) { - printk(BIOS_ERR, "Unable to install SMM relocation handler.\n"); - return -1; - } + *perm_smbase = relo_attrs.smbase; + *perm_smsize = smm_region_size() - CONFIG_SMM_RESERVED_SIZE; + *smm_save_state_size = sizeof(em64t100_smm_state_save_area_t); +}
- if (install_permanent_handler(pattrs->num_cpus) < 0) { - printk(BIOS_ERR, "Unable to install SMM permanent handler.\n"); - return -1; - } +/* The APIC id space on Bay Trail is sparse. Each id is separated by 2. */ +static int adjust_apic_id(int index, int apic_id) +{ + return 2 * index; +}
- /* Ensure the SMM handlers hit DRAM before performing first SMI. */ - wbinvd(); +static void get_microcode_info(const void **microcode, int *parallel) +{ + const struct pattrs *pattrs = pattrs_get();
- return 0; + *microcode = pattrs->microcode_patch; + *parallel = 1; }
-static void smm_relocate(void) +static void per_cpu_smm_trigger(void) { const struct pattrs *pattrs = pattrs_get();
- /* Load relocation and permanent handler. */ - if (boot_cpu()) { - if (smm_load_handlers() < 0) { - printk(BIOS_ERR, "Error loading SMM handlers.\n"); - return; - } - southcluster_smm_clear_state(); - } - /* Relocate SMM space. */ smm_initiate_relocation();
@@ -298,7 +176,41 @@ static void smm_relocate(void) intel_microcode_load_unlocked(pattrs->microcode_patch); }
-static void enable_smis(void) +static void relocation_handler(int cpu, uintptr_t curr_smbase, + uintptr_t staggered_smbase) { - southcluster_smm_enable_smi(); + msr_t smrr; + em64t100_smm_state_save_area_t *smm_state; + + /* Set up SMRR. */ + smrr.lo = relo_attrs.smrr_base; + smrr.hi = 0; + wrmsr(SMRR_PHYS_BASE, smrr); + smrr.lo = relo_attrs.smrr_mask; + smrr.hi = 0; + wrmsr(SMRR_PHYS_MASK, smrr); + + smm_state = (void *)(SMM_EM64T100_SAVE_STATE_OFFSET + curr_smbase); + smm_state->smbase = staggered_smbase; +} + +static const struct mp_ops mp_ops = { + .pre_mp_init = pre_mp_init, + .get_cpu_count = get_cpu_count, + .get_smm_info = get_smm_info, + .get_microcode_info = get_microcode_info, + .adjust_cpu_apic_entry = adjust_apic_id, + .pre_mp_smm_init = southcluster_smm_clear_state, + .per_cpu_smm_trigger = per_cpu_smm_trigger, + .relocation_handler = relocation_handler, + .post_mp_init = southcluster_smm_enable_smi, +}; + +void baytrail_init_cpus(device_t dev) +{ + struct bus *cpu_bus = dev->link_list; + + if (mp_init_with_smm(cpu_bus, &mp_ops)) { + printk(BIOS_ERR, "MP initialization failure.\n"); + } }
-
Aaron Durbin