GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

amd/stoneyridge: Unify SMM relocation 

Change-Id: I02ad07e049cb74ccb52ba3d41eb16c58a2cfb38b
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34748
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Kyösti Mälkki 2019-08-06 01:44:58 +03:00
parent 1dbf31014f
commit 0d4d09cad1
1 changed files with 26 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
src/soc/amd/stoneyridge/cpu.c
View File

@ -34,13 +34,12 @@
/*
* MP and SMM loading initialization.
*/
struct smm_relocation_attrs {
uint32_t smbase;
uint32_t tseg_base;
uint32_t tseg_mask;
struct smm_relocation_params {
msr_t tseg_base;
msr_t tseg_mask;
};
static struct smm_relocation_attrs relo_attrs;
static struct smm_relocation_params smm_reloc_params;
/*
* Do essential initialization tasks before APs can be fired up -
@ -61,40 +60,41 @@ static int get_cpu_count(void)
+ 1;
}
static void fill_in_relocation_params(struct smm_relocation_params *params)
{
uintptr_t tseg_base;
size_t tseg_size;
smm_region(&tseg_base, &tseg_size);
params->tseg_base.lo = ALIGN_DOWN(tseg_base, 128 * KiB);
params->tseg_base.hi = 0;
params->tseg_mask.lo = ALIGN_DOWN(~(tseg_size - 1), 128 * KiB);
params->tseg_mask.hi = ((1 << (cpu_phys_address_size() - 32)) - 1);
params->tseg_mask.lo |= SMM_TSEG_WB;
}
static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize,
size_t *smm_save_state_size)
{
uintptr_t smm_base;
size_t smm_size;
uintptr_t handler_base;
size_t handler_size;
printk(BIOS_DEBUG, "Setting up SMI for CPU\n");
/* Initialize global tracking state. */
smm_region(&smm_base, &smm_size);
smm_subregion(SMM_SUBREGION_HANDLER, &handler_base, &handler_size);
fill_in_relocation_params(&smm_reloc_params);
relo_attrs.smbase = smm_base;
relo_attrs.tseg_base = relo_attrs.smbase;
relo_attrs.tseg_mask = ALIGN_DOWN(~(smm_size - 1), 128 * KiB);
relo_attrs.tseg_mask |= SMM_TSEG_WB;
*perm_smbase = handler_base;
*perm_smsize = handler_size;
smm_subregion(SMM_SUBREGION_HANDLER, perm_smbase, perm_smsize);
*smm_save_state_size = sizeof(amd64_smm_state_save_area_t);
}
static void relocation_handler(int cpu, uintptr_t curr_smbase,
uintptr_t staggered_smbase)
{
msr_t tseg_base, tseg_mask;
struct smm_relocation_params *relo_params = &smm_reloc_params;
amd64_smm_state_save_area_t *smm_state;
tseg_base.lo = relo_attrs.tseg_base;
tseg_base.hi = 0;
wrmsr(SMM_ADDR_MSR, tseg_base);
tseg_mask.lo = relo_attrs.tseg_mask;
tseg_mask.hi = ((1 << (cpu_phys_address_size() - 32)) - 1);
wrmsr(SMM_MASK_MSR, tseg_mask);
wrmsr(SMM_ADDR_MSR, relo_params->tseg_base);
wrmsr(SMM_MASK_MSR, relo_params->tseg_mask);
smm_state = (void *)(SMM_AMD64_SAVE_STATE_OFFSET + curr_smbase);
smm_state->smbase = staggered_smbase;
}