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cpu/intel/speedstep: Refactor P-state coordination 

Change-Id: I12462f271821d3d8fe3324d84a65c2341729591e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74398
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Kyösti Mälkki 2023-04-12 17:55:25 +03:00
parent 8e6146049f
commit 199ccf81dd
1 changed files with 12 additions and 7 deletions
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19
src/cpu/intel/speedstep/acpi.c
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@ -60,6 +60,16 @@ static void gen_pstate_entries(const sst_table_t *const pstates,
acpigen_write_PPC(0);
}
static uint8_t get_p_state_coordination(void)
{
/* For Penryn use HW_ALL. */
if (((cpuid_eax(1) >> 4) & 0xffff) == 0x1067)
return HW_ALL;
/* Use SW_ANY as that was the default. */
return SW_ANY;
}
/**
* @brief Generate ACPI entries for Speedstep for each cpu
*/
@ -71,22 +81,17 @@ void generate_cpu_entries(const struct device *device)
int numcpus = totalcores/cores_per_package; /* This assumes that all
CPUs share the same
layout. */
int num_cstates;
const acpi_cstate_t *cstates;
sst_table_t pstates;
uint8_t coordination;
uint8_t coordination = get_p_state_coordination();
printk(BIOS_DEBUG, "Found %d CPU(s) with %d core(s) each.\n",
numcpus, cores_per_package);
num_cstates = get_cst_entries(&cstates);
speedstep_gen_pstates(&pstates);
if (((cpuid_eax(1) >> 4) & 0xffff) == 0x1067)
/* For Penryn use HW_ALL. */
coordination = HW_ALL;
else
/* Use SW_ANY as that was the default. */
coordination = SW_ANY;
for (cpuID = 0; cpuID < numcpus; ++cpuID) {
for (coreID = 1; coreID <= cores_per_package; coreID++) {