diff options
Diffstat (limited to 'src/soc/intel/skylake')
| -rw-r--r-- | src/soc/intel/skylake/Kconfig | 1 | ||||
| -rw-r--r-- | src/soc/intel/skylake/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/intel/skylake/smmrelocate.c | 250 |
3 files changed, 1 insertions, 251 deletions
diff --git a/src/soc/intel/skylake/Kconfig b/src/soc/intel/skylake/Kconfig index b8da13c859..29f8159fcf 100644 --- a/src/soc/intel/skylake/Kconfig +++ b/src/soc/intel/skylake/Kconfig @@ -55,6 +55,7 @@ config CPU_SPECIFIC_OPTIONS select SOC_INTEL_COMMON_BLOCK_CHIP_CONFIG select SOC_INTEL_COMMON_BLOCK_CPU select SOC_INTEL_COMMON_BLOCK_CPU_MPINIT + select SOC_INTEL_COMMON_BLOCK_CPU_SMMRELOCATE select SOC_INTEL_COMMON_BLOCK_GPIO_DUAL_ROUTE_SUPPORT select SOC_INTEL_COMMON_BLOCK_GPIO_PADCFG_PADTOL select SOC_INTEL_COMMON_BLOCK_GSPI diff --git a/src/soc/intel/skylake/Makefile.inc b/src/soc/intel/skylake/Makefile.inc index 1d36feb438..1a4f740156 100644 --- a/src/soc/intel/skylake/Makefile.inc +++ b/src/soc/intel/skylake/Makefile.inc @@ -57,7 +57,6 @@ ramstage-y += pmc.c ramstage-y += pmutil.c ramstage-y += reset.c ramstage-y += sd.c -ramstage-y += smmrelocate.c ramstage-y += spi.c ramstage-y += systemagent.c ramstage-y += uart.c diff --git a/src/soc/intel/skylake/smmrelocate.c b/src/soc/intel/skylake/smmrelocate.c deleted file mode 100644 index 4df90fd7ce..0000000000 --- a/src/soc/intel/skylake/smmrelocate.c +++ /dev/null @@ -1,250 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ - -#include <console/console.h> -#include <cpu/intel/common/common.h> -#include <cpu/intel/em64t101_save_state.h> -#include <cpu/intel/smm_reloc.h> -#include <cpu/x86/mp.h> -#include <cpu/x86/msr.h> -#include <cpu/x86/mtrr.h> -#include <cpu/x86/smm.h> -#include <device/device.h> -#include <device/pci.h> -#include <device/pci_ops.h> -#include <smp/node.h> -#include <soc/cpu.h> -#include <soc/msr.h> -#include <soc/pci_devs.h> -#include <soc/soc_chip.h> -#include <string.h> -#include <types.h> - -static void update_save_state(int cpu, uintptr_t curr_smbase, - uintptr_t staggered_smbase, - struct smm_relocation_params *relo_params) -{ - u32 smbase; - u32 iedbase; - - /* - * The relocated handler runs with all CPUs concurrently. Therefore - * stagger the entry points adjusting SMBASE downwards by save state - * size * CPU num. - */ - smbase = staggered_smbase; - iedbase = relo_params->ied_base; - - printk(BIOS_DEBUG, "New SMBASE=0x%08x IEDBASE=0x%08x\n", - smbase, iedbase); - - /* - * All threads need to set IEDBASE and SMBASE to the relocated - * handler region. However, the save state location depends on the - * smm_save_state_in_msrs field in the relocation parameters. If - * smm_save_state_in_msrs is non-zero then the CPUs are relocating - * the SMM handler in parallel, and each CPUs save state area is - * located in their respective MSR space. If smm_save_state_in_msrs - * is zero then the SMM relocation is happening serially so the - * save state is at the same default location for all CPUs. - */ - if (relo_params->smm_save_state_in_msrs) { - msr_t smbase_msr; - msr_t iedbase_msr; - - smbase_msr.lo = smbase; - smbase_msr.hi = 0; - - /* - * According the BWG the IEDBASE MSR is in bits 63:32. It's - * not clear why it differs from the SMBASE MSR. - */ - iedbase_msr.lo = 0; - iedbase_msr.hi = iedbase; - - wrmsr(SMBASE_MSR, smbase_msr); - wrmsr(IEDBASE_MSR, iedbase_msr); - } else { - em64t101_smm_state_save_area_t *save_state; - - save_state = (void *)(curr_smbase + SMM_DEFAULT_SIZE - - sizeof(*save_state)); - - save_state->smbase = smbase; - save_state->iedbase = iedbase; - } -} - -/* Returns 1 if SMM MSR save state was set. */ -static int bsp_setup_msr_save_state(struct smm_relocation_params *relo_params) -{ - msr_t smm_mca_cap; - - smm_mca_cap = rdmsr(SMM_MCA_CAP_MSR); - if (smm_mca_cap.hi & SMM_CPU_SVRSTR_MASK) { - msr_t smm_feature_control; - - smm_feature_control = rdmsr(SMM_FEATURE_CONTROL_MSR); - smm_feature_control.hi = 0; - smm_feature_control.lo |= SMM_CPU_SAVE_EN; - wrmsr(SMM_FEATURE_CONTROL_MSR, smm_feature_control); - relo_params->smm_save_state_in_msrs = 1; - } - return relo_params->smm_save_state_in_msrs; -} - -/* - * The relocation work is actually performed in SMM context, but the code - * resides in the ramstage module. This occurs by trampolining from the default - * SMRAM entry point to here. - */ -void smm_relocation_handler(int cpu, uintptr_t curr_smbase, - uintptr_t staggered_smbase) -{ - msr_t mtrr_cap; - struct smm_relocation_params *relo_params = &smm_reloc_params; - - printk(BIOS_DEBUG, "In relocation handler: CPU %d\n", cpu); - - /* - * Determine if the processor supports saving state in MSRs. If so, - * enable it before the non-BSPs run so that SMM relocation can occur - * in parallel in the non-BSP CPUs. - */ - if (cpu == 0) { - /* - * If smm_save_state_in_msrs is 1 then that means this is the - * 2nd time through the relocation handler for the BSP. - * Parallel SMM handler relocation is taking place. However, - * it is desired to access other CPUs save state in the real - * SMM handler. Therefore, disable the SMM save state in MSRs - * feature. - */ - if (relo_params->smm_save_state_in_msrs) { - msr_t smm_feature_control; - - smm_feature_control = rdmsr(SMM_FEATURE_CONTROL_MSR); - smm_feature_control.lo &= ~SMM_CPU_SAVE_EN; - wrmsr(SMM_FEATURE_CONTROL_MSR, smm_feature_control); - } else if (bsp_setup_msr_save_state(relo_params)) - /* - * Just return from relocation handler if MSR save - * state is enabled. In that case the BSP will come - * back into the relocation handler to setup the new - * SMBASE as well disabling SMM save state in MSRs. - */ - return; - } - - /* Make appropriate changes to the save state map. */ - update_save_state(cpu, curr_smbase, staggered_smbase, relo_params); - - /* - * The SMRR MSRs are core-level registers, so if two threads that share - * a core try to both set the lock bit (in the same physical register), - * a #GP will be raised on the second write to that register (which is - * exactly what the lock is supposed to do), therefore secondary threads - * should exit here. - */ - if (intel_ht_sibling()) - return; - - /* Write SMRR MSRs based on indicated support. */ - mtrr_cap = rdmsr(MTRR_CAP_MSR); - - /* Set Lock bit if supported */ - if (mtrr_cap.lo & SMRR_LOCK_SUPPORTED) - relo_params->smrr_mask.lo |= SMRR_PHYS_MASK_LOCK; - - /* Write SMRRs if supported */ - if (mtrr_cap.lo & SMRR_SUPPORTED) - write_smrr(relo_params); -} - -static void fill_in_relocation_params(struct smm_relocation_params *params) -{ - uintptr_t tseg_base; - size_t tseg_size; - /* All range registers are aligned to 4KiB */ - const u32 rmask = ~(4 * KiB - 1); - - smm_region(&tseg_base, &tseg_size); - - if (!IS_ALIGNED(tseg_base, tseg_size)) { - printk(BIOS_WARNING, "TSEG base not aligned with TSEG size! Not setting SMRR\n"); - return; - } - - smm_subregion(SMM_SUBREGION_CHIPSET, ¶ms->ied_base, ¶ms->ied_size); - - /* SMRR has 32-bits of valid address aligned to 4KiB. */ - params->smrr_base.lo = (tseg_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; -} - -static void setup_ied_area(struct smm_relocation_params *params) -{ - char *ied_base; - - struct ied_header ied = { - .signature = "INTEL RSVD", - .size = params->ied_size, - .reserved = {0}, - }; - - ied_base = (void *)params->ied_base; - - printk(BIOS_DEBUG, "IED base = 0x%08x\n", (u32)params->ied_base); - printk(BIOS_DEBUG, "IED size = 0x%08x\n", (u32)params->ied_size); - - /* Place IED header at IEDBASE. */ - memcpy(ied_base, &ied, sizeof(ied)); - - /* Zero out 32KiB at IEDBASE + 1MiB */ - memset(ied_base + 1 * MiB, 0, 32 * KiB); -} - -void smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, - size_t *smm_save_state_size) -{ - printk(BIOS_DEBUG, "Setting up SMI for CPU\n"); - - fill_in_relocation_params(&smm_reloc_params); - - smm_subregion(SMM_SUBREGION_HANDLER, perm_smbase, perm_smsize); - - if (smm_reloc_params.ied_size) - setup_ied_area(&smm_reloc_params); - - *smm_save_state_size = sizeof(em64t101_smm_state_save_area_t); -} - -void smm_initialize(void) -{ - /* Clear the SMM state in the southbridge. */ - smm_southbridge_clear_state(); - - /* - * Run the relocation handler for on the BSP to check and set up - * parallel SMM relocation. - */ - smm_initiate_relocation(); - - if (smm_reloc_params.smm_save_state_in_msrs) - printk(BIOS_DEBUG, "Doing parallel SMM relocation.\n"); -} - -void smm_relocate(void) -{ - /* - * If smm_save_state_in_msrs is non-zero then parallel SMM relocation - * shall take place. Run the relocation handler a second time on the - * BSP to do * the final move. For APs, a relocation handler always - * needs to be run. - */ - if (smm_reloc_params.smm_save_state_in_msrs) - smm_initiate_relocation_parallel(); - else if (!boot_cpu()) - smm_initiate_relocation(); -} |