mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 06:45:09 +07:00
0cd39f4600
By using lockdep_assert_*() from seqlock.h, the spaghetti monster
attacked.
Attack back by reducing seqlock.h dependencies from two key high level headers:
- <linux/seqlock.h>: -Remove <linux/ww_mutex.h>
- <linux/time.h>: -Remove <linux/seqlock.h>
- <linux/sched.h>: +Add <linux/seqlock.h>
The price was to add it to sched.h ...
Core header fallout, we add direct header dependencies instead of gaining them
parasitically from higher level headers:
- <linux/dynamic_queue_limits.h>: +Add <asm/bug.h>
- <linux/hrtimer.h>: +Add <linux/seqlock.h>
- <linux/ktime.h>: +Add <asm/bug.h>
- <linux/lockdep.h>: +Add <linux/smp.h>
- <linux/sched.h>: +Add <linux/seqlock.h>
- <linux/videodev2.h>: +Add <linux/kernel.h>
Arch headers fallout:
- PARISC: <asm/timex.h>: +Add <asm/special_insns.h>
- SH: <asm/io.h>: +Add <asm/page.h>
- SPARC: <asm/timer_64.h>: +Add <uapi/asm/asi.h>
- SPARC: <asm/vvar.h>: +Add <asm/processor.h>, <asm/barrier.h>
-Remove <linux/seqlock.h>
- X86: <asm/fixmap.h>: +Add <asm/pgtable_types.h>
-Remove <asm/acpi.h>
There's also a bunch of parasitic header dependency fallout in .c files, not listed
separately.
[ mingo: Extended the changelog, split up & fixed the original patch. ]
Co-developed-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200804133438.GK2674@hirez.programming.kicks-ass.net
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/thread_info.h>
|
|
#include <asm/smp.h>
|
|
|
|
#include <xen/events.h>
|
|
|
|
#include "xen-ops.h"
|
|
#include "smp.h"
|
|
|
|
|
|
static void __init xen_hvm_smp_prepare_boot_cpu(void)
|
|
{
|
|
BUG_ON(smp_processor_id() != 0);
|
|
native_smp_prepare_boot_cpu();
|
|
|
|
/*
|
|
* Setup vcpu_info for boot CPU. Secondary CPUs get their vcpu_info
|
|
* in xen_cpu_up_prepare_hvm().
|
|
*/
|
|
xen_vcpu_setup(0);
|
|
|
|
/*
|
|
* The alternative logic (which patches the unlock/lock) runs before
|
|
* the smp bootup up code is activated. Hence we need to set this up
|
|
* the core kernel is being patched. Otherwise we will have only
|
|
* modules patched but not core code.
|
|
*/
|
|
xen_init_spinlocks();
|
|
}
|
|
|
|
static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
|
|
{
|
|
int cpu;
|
|
|
|
native_smp_prepare_cpus(max_cpus);
|
|
WARN_ON(xen_smp_intr_init(0));
|
|
|
|
xen_init_lock_cpu(0);
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
if (cpu == 0)
|
|
continue;
|
|
|
|
/* Set default vcpu_id to make sure that we don't use cpu-0's */
|
|
per_cpu(xen_vcpu_id, cpu) = XEN_VCPU_ID_INVALID;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
static void xen_hvm_cpu_die(unsigned int cpu)
|
|
{
|
|
if (common_cpu_die(cpu) == 0) {
|
|
xen_smp_intr_free(cpu);
|
|
xen_uninit_lock_cpu(cpu);
|
|
xen_teardown_timer(cpu);
|
|
}
|
|
}
|
|
#else
|
|
static void xen_hvm_cpu_die(unsigned int cpu)
|
|
{
|
|
BUG();
|
|
}
|
|
#endif
|
|
|
|
void __init xen_hvm_smp_init(void)
|
|
{
|
|
if (!xen_have_vector_callback)
|
|
return;
|
|
|
|
smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus;
|
|
smp_ops.smp_send_reschedule = xen_smp_send_reschedule;
|
|
smp_ops.cpu_die = xen_hvm_cpu_die;
|
|
smp_ops.send_call_func_ipi = xen_smp_send_call_function_ipi;
|
|
smp_ops.send_call_func_single_ipi = xen_smp_send_call_function_single_ipi;
|
|
smp_ops.smp_prepare_boot_cpu = xen_hvm_smp_prepare_boot_cpu;
|
|
smp_ops.smp_cpus_done = xen_smp_cpus_done;
|
|
}
|