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if ARCH_X86
config PARALLEL_MP
def_bool y
depends on !LEGACY_SMP_INIT
select CPU_INFO_V2
help
This option uses common MP infrastructure for bringing up APs
in parallel. It additionally provides a more flexible mechanism
for sequencing the steps of bringing up the APs.
The code also works for just initialising the BSP in case there
are no APs.
config PARALLEL_MP_AP_WORK
def_bool n
depends on PARALLEL_MP
help
Allow APs to do other work after initialization instead of going
to sleep.
config X86_SMM_SKIP_RELOCATION_HANDLER
bool
default n
depends on PARALLEL_MP && HAVE_SMI_HANDLER
help
Skip SMM relocation using a relocation handler running in SMM
with a stub at 0x30000. This is useful on platforms that have
an alternative way to set SMBASE.
config LEGACY_SMP_INIT
bool
config DEFAULT_X2APIC
def_bool n
help
Allow SoC code to set LAPIC_ACCESS_MODE to X2APIC.
config DEFAULT_X2APIC_RUNTIME
def_bool n
help
Allow SoC code to set LAPIC_ACCESS_MODE to X2APIC_RUNTIME.
config DEFAULT_X2APIC_LATE_WORKAROUND
def_bool n
help
Allow SoC code to set LAPIC_ACCESS_MODE to X2APIC_LATE_WORKAROUND.
choice LAPIC_ACCESS_MODE
prompt "APIC operation mode"
default X2APIC_ONLY if DEFAULT_X2APIC
default X2APIC_RUNTIME if DEFAULT_X2APIC_RUNTIME
default X2APIC_LATE_WORKAROUND if DEFAULT_X2APIC_LATE_WORKAROUND
default XAPIC_ONLY
config XAPIC_ONLY
prompt "Set XAPIC mode"
bool
config X2APIC_ONLY
prompt "Set X2APIC mode"
bool
depends on PARALLEL_MP
config X2APIC_RUNTIME
prompt "Support both XAPIC and X2APIC"
bool
depends on PARALLEL_MP
config X2APIC_LATE_WORKAROUND
prompt "Use XAPIC for AP bringup, then change to X2APIC"
bool
depends on PARALLEL_MP && MAX_CPUS < 256
help
Choose this option if the platform supports dynamic switching between
XAPIC to X2APIC. The initial Application Processors (APs) are configured
in XAPIC mode at reset and later enable X2APIC as a CPU feature.
All access mechanisms between XAPIC (mmio) and X2APIC (msr) switches
at runtime when this option is enabled.
endchoice
config UDELAY_LAPIC
bool
default n
config LAPIC_MONOTONIC_TIMER
def_bool n
depends on UDELAY_LAPIC
help
Expose monotonic time using the local APIC.
config UDELAY_LAPIC_FIXED_FSB
int
config UDELAY_TSC
bool
default n
config UNKNOWN_TSC_RATE
bool
default y if LAPIC_MONOTONIC_TIMER
config TSC_MONOTONIC_TIMER
def_bool n
depends on UDELAY_TSC
help
Expose monotonic time using the TSC.
config TSC_SYNC_LFENCE
bool
default n
help
The CPU driver should select this if the CPU needs
to execute an lfence instruction in order to synchronize
rdtsc. This is true for all modern AMD CPUs.
config TSC_SYNC_MFENCE
bool
default n
help
The CPU driver should select this if the CPU needs
to execute an mfence instruction in order to synchronize
rdtsc. This is true for all modern Intel CPUs.
config SETUP_XIP_CACHE
bool
depends on !NO_XIP_EARLY_STAGES
help
Select this option to set up an MTRR to cache XIP stages loaded
from the bootblock. This is useful on platforms lacking a
non-eviction mode and therefore need to be careful to avoid
eviction.
config LOGICAL_CPUS
bool
default y
config HAVE_SMI_HANDLER
bool
default n
depends on (SMM_ASEG || SMM_TSEG)
config NO_SMM
bool
default n
config SMM_ASEG
bool
default n
depends on !NO_SMM
config SMM_TSEG
bool
default y
depends on !(NO_SMM || SMM_ASEG)
config SMM_LEGACY_ASEG
bool
default y if HAVE_SMI_HANDLER && SMM_ASEG && LEGACY_SMP_INIT
help
SMM support without PARALLEL_MP, to be deprecated.
if HAVE_SMI_HANDLER && !SMM_LEGACY_ASEG
config SMM_MODULE_STACK_SIZE
hex
default 0x800 if ARCH_RAMSTAGE_X86_64
default 0x400
help
This option determines the size of the stack within the SMM handler
modules.
config SMM_STUB_STACK_SIZE
hex
default 0x400
help
This option determines the size of the stack within the SMM handler
modules.
endif
config SMM_LAPIC_REMAP_MITIGATION
bool
default y if NORTHBRIDGE_INTEL_I945 || NORTHBRIDGE_INTEL_GM45 \
|| NORTHBRIDGE_INTEL_X4X || NORTHBRIDGE_INTEL_PINEVIEW \
|| NORTHBRIDGE_INTEL_IRONLAKE
default n
config X86_AMD_FIXED_MTRRS
bool
default n
help
This option informs the MTRR code to use the RdMem and WrMem fields
in the fixed MTRR MSRs.
config X86_INIT_NEED_1_SIPI
bool
default n
help
This option limits the number of SIPI signals sent during during the
common AP setup. Intel documentation specifies an INIT SIPI SIPI
sequence, however this doesn't work on some AMD and Intel platforms.
These newer AMD and Intel platforms don't need the 10ms wait between
INIT and SIPI, so skip that too to save some time.
config SOC_SETS_MSRS
bool
default n
help
The SoC requires different access methods for reading and writing
the MSRs. Use SoC specific routines to handle the MSR access.
config RESERVE_MTRRS_FOR_OS
bool
default n
help
This option allows a platform to reserve 2 MTRRs for the OS usage.
The Intel SDM documents that the the first 6 MTRRs are intended for
the system BIOS and the last 2 are to be reserved for OS usage.
However, modern OSes use PAT to control cacheability instead of
using MTRRs.
config CPU_INFO_V2
bool
depends on PARALLEL_MP
help
Enables the new method of locating struct cpu_info. This new method
uses the %gs segment to locate the cpu_info pointer. The old method
relied on the stack being CONFIG_STACK_SIZE aligned.
endif # ARCH_X86
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