Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
44 lines
922 B
C
44 lines
922 B
C
/*
|
|
* Common functions shared between the various APIC flavours
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0
|
|
*/
|
|
#include <linux/irq.h>
|
|
#include <linux/kvm_types.h>
|
|
#include <asm/apic.h>
|
|
|
|
#include "local.h"
|
|
|
|
u32 apic_default_calc_apicid(unsigned int cpu)
|
|
{
|
|
return per_cpu(x86_cpu_to_apicid, cpu);
|
|
}
|
|
|
|
u32 apic_flat_calc_apicid(unsigned int cpu)
|
|
{
|
|
return 1U << cpu;
|
|
}
|
|
|
|
u32 default_cpu_present_to_apicid(int mps_cpu)
|
|
{
|
|
if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
|
|
return (int)per_cpu(x86_cpu_to_apicid, mps_cpu);
|
|
else
|
|
return BAD_APICID;
|
|
}
|
|
EXPORT_SYMBOL_FOR_KVM(default_cpu_present_to_apicid);
|
|
|
|
/*
|
|
* Set up the logical destination ID when the APIC operates in logical
|
|
* destination mode.
|
|
*/
|
|
void default_init_apic_ldr(void)
|
|
{
|
|
unsigned long val;
|
|
|
|
apic_write(APIC_DFR, APIC_DFR_FLAT);
|
|
val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
|
|
val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
|
|
apic_write(APIC_LDR, val);
|
|
}
|