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authorSridhar Siricilla <sridhar.siricilla@intel.com>2023-01-19 18:50:09 +0530
committerSridhar Siricilla <sridhar.siricilla@intel.com>2023-04-07 09:59:52 +0000
commit7301cfac601d16460a7b592f011493de3f0c6d9d (patch)
treef84a96c34dc28593ebaf02818d916330687aba01 /src/soc/intel
parentc49efa365e1e1f07db8f208f4a63f27ca81e290d (diff)
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soc/intel/common: Order the different types of cores based on APIC IDs
Currently coreboot presents the BSP core first, then efficient cores and Performance cores as indicated below: ``` /sys/devices/system/cpu/cpu0/topology/thread_siblings_list:0-1 /sys/devices/system/cpu/cpu4/topology/thread_siblings_list:4 /sys/devices/system/cpu/cpu5/topology/thread_siblings_list:5 /sys/devices/system/cpu/cpu6/topology/thread_siblings_list:6 /sys/devices/system/cpu/cpu7/topology/thread_siblings_list:7 /sys/devices/system/cpu/cpu1/topology/thread_siblings_list:0-1 /sys/devices/system/cpu/cpu2/topology/thread_siblings_list:2-3 /sys/devices/system/cpu/cpu3/topology/thread_siblings_list:2-3 ``` Existing code presents mix of different cores to OS and causes CPU load balancing and power/performance impact. So, the patch fixes this disorder by ordering the Performance cores first, compute die efficient cores next, and finally SOC efficient cores if they are present. This is done to run the media applications in a power efficient manner, please refer the ChromeOS patches for details: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/3963893 BUG=b:262886449 TEST=Verified the code on Rex system After the fix: ``` /sys/devices/system/cpu/cpu0/topology/thread_siblings_list:0-1 /sys/devices/system/cpu/cpu1/topology/thread_siblings_list:0-1 /sys/devices/system/cpu/cpu2/topology/thread_siblings_list:2-3 /sys/devices/system/cpu/cpu3/topology/thread_siblings_list:2-3 /sys/devices/system/cpu/cpu4/topology/thread_siblings_list:4 /sys/devices/system/cpu/cpu5/topology/thread_siblings_list:5 /sys/devices/system/cpu/cpu6/topology/thread_siblings_list:6 /sys/devices/system/cpu/cpu7/topology/thread_siblings_list:7 ``` Change-Id: I21487a5eb0439ea0cb5976787d1769ee94777469 Signed-off-by: Sridhar Siricilla <sridhar.siricilla@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/72132 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jan Samek <jan.samek@siemens.com> Reviewed-by: Sukumar Ghorai <sukumar.ghorai@intel.com> Reviewed-by: Ronak Kanabar <ronak.kanabar@intel.com>
Diffstat (limited to 'src/soc/intel')
-rw-r--r--src/soc/intel/common/block/acpi/acpi.c6
-rw-r--r--src/soc/intel/common/block/acpi/cpu_hybrid.c34
-rw-r--r--src/soc/intel/common/block/include/intelblocks/acpi.h2
3 files changed, 41 insertions, 1 deletions
diff --git a/src/soc/intel/common/block/acpi/acpi.c b/src/soc/intel/common/block/acpi/acpi.c
index 1c3747d76aa7..4b790b77f0c3 100644
--- a/src/soc/intel/common/block/acpi/acpi.c
+++ b/src/soc/intel/common/block/acpi/acpi.c
@@ -87,7 +87,11 @@ unsigned long acpi_fill_madt(unsigned long current)
size_t ioapic_entries;
/* Local APICs */
- current = acpi_create_madt_lapics_with_nmis(current);
+
+ if (CONFIG(SOC_INTEL_COMMON_BLOCK_ACPI_CPU_HYBRID))
+ current = acpi_create_madt_lapics_with_nmis_hybrid(current);
+ else
+ current = acpi_create_madt_lapics_with_nmis(current);
/* IOAPIC */
ioapic_entries = soc_get_ioapic_info(&ioapic_table);
diff --git a/src/soc/intel/common/block/acpi/cpu_hybrid.c b/src/soc/intel/common/block/acpi/cpu_hybrid.c
index a6f91033805f..7725e3fa0a7e 100644
--- a/src/soc/intel/common/block/acpi/cpu_hybrid.c
+++ b/src/soc/intel/common/block/acpi/cpu_hybrid.c
@@ -77,6 +77,40 @@ static void acpi_set_hybrid_cpu_apicid_order(void *unused)
cpu_apic_info.perf_cpu_cnt = perf_core_cnt;
}
+static unsigned long acpi_create_madt_lapics_hybrid(unsigned long current)
+{
+ size_t index;
+
+ for (index = 0; index < cpu_apic_info.total_cpu_cnt; index++) {
+ if (cpu_apic_info.apic_ids[index] < 0xff)
+ current += acpi_create_madt_lapic((acpi_madt_lapic_t *)current,
+ index, cpu_apic_info.apic_ids[index]);
+ else
+ current += acpi_create_madt_lx2apic((acpi_madt_lx2apic_t *)current,
+ index, cpu_apic_info.apic_ids[index]);
+ }
+
+ return current;
+}
+
+unsigned long acpi_create_madt_lapics_with_nmis_hybrid(unsigned long current)
+{
+ const u16 flags = MP_IRQ_TRIGGER_EDGE | MP_IRQ_POLARITY_HIGH;
+
+ current = acpi_create_madt_lapics_hybrid(current);
+
+ /* 1: LINT1 connect to NMI */
+ /* create all subtables for processors */
+ current += acpi_create_madt_lapic_nmi((acpi_madt_lapic_nmi_t *)current,
+ ACPI_MADT_LAPIC_NMI_ALL_PROCESSORS, flags, 1);
+
+ if (!CONFIG(XAPIC_ONLY))
+ current += acpi_create_madt_lx2apic_nmi((acpi_madt_lx2apic_nmi_t *)current,
+ ACPI_MADT_LX2APIC_NMI_ALL_PROCESSORS, flags, 1);
+
+ return current;
+}
+
static enum cpu_perf_eff_type get_core_type(void)
{
return (get_soc_cpu_type() == CPUID_CORE_TYPE_INTEL_CORE) ?
diff --git a/src/soc/intel/common/block/include/intelblocks/acpi.h b/src/soc/intel/common/block/include/intelblocks/acpi.h
index 0f7a16579be3..fa3209256868 100644
--- a/src/soc/intel/common/block/include/intelblocks/acpi.h
+++ b/src/soc/intel/common/block/include/intelblocks/acpi.h
@@ -18,6 +18,8 @@ enum core_type {
CPUID_UNKNOWN = 0xff,
};
+unsigned long acpi_create_madt_lapics_with_nmis_hybrid(unsigned long current);
+
/* Generates ACPI code to define _CPC control method */
void acpigen_write_CPPC_hybrid_method(int core_id);