mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-01-26 19:59:24 +07:00
65fddcfca8
The replacement of <asm/pgrable.h> with <linux/pgtable.h> made the include
of the latter in the middle of asm includes. Fix this up with the aid of
the below script and manual adjustments here and there.
import sys
import re
if len(sys.argv) is not 3:
print "USAGE: %s <file> <header>" % (sys.argv[0])
sys.exit(1)
hdr_to_move="#include <linux/%s>" % sys.argv[2]
moved = False
in_hdrs = False
with open(sys.argv[1], "r") as f:
lines = f.readlines()
for _line in lines:
line = _line.rstrip('
')
if line == hdr_to_move:
continue
if line.startswith("#include <linux/"):
in_hdrs = True
elif not moved and in_hdrs:
moved = True
print hdr_to_move
print line
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-4-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
166 lines
3.7 KiB
C
166 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* SMP support for BPA machines.
|
|
*
|
|
* Dave Engebretsen, Peter Bergner, and
|
|
* Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
|
|
*
|
|
* Plus various changes from other IBM teams...
|
|
*/
|
|
|
|
#undef DEBUG
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/init.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/cache.h>
|
|
#include <linux/err.h>
|
|
#include <linux/device.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/pgtable.h>
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <linux/atomic.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/page.h>
|
|
#include <asm/io.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/paca.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/cputable.h>
|
|
#include <asm/firmware.h>
|
|
#include <asm/rtas.h>
|
|
#include <asm/cputhreads.h>
|
|
#include <asm/code-patching.h>
|
|
|
|
#include "interrupt.h"
|
|
#include <asm/udbg.h>
|
|
|
|
#ifdef DEBUG
|
|
#define DBG(fmt...) udbg_printf(fmt)
|
|
#else
|
|
#define DBG(fmt...)
|
|
#endif
|
|
|
|
/*
|
|
* The Primary thread of each non-boot processor was started from the OF client
|
|
* interface by prom_hold_cpus and is spinning on secondary_hold_spinloop.
|
|
*/
|
|
static cpumask_t of_spin_map;
|
|
|
|
/**
|
|
* smp_startup_cpu() - start the given cpu
|
|
*
|
|
* At boot time, there is nothing to do for primary threads which were
|
|
* started from Open Firmware. For anything else, call RTAS with the
|
|
* appropriate start location.
|
|
*
|
|
* Returns:
|
|
* 0 - failure
|
|
* 1 - success
|
|
*/
|
|
static inline int smp_startup_cpu(unsigned int lcpu)
|
|
{
|
|
int status;
|
|
unsigned long start_here =
|
|
__pa(ppc_function_entry(generic_secondary_smp_init));
|
|
unsigned int pcpu;
|
|
int start_cpu;
|
|
|
|
if (cpumask_test_cpu(lcpu, &of_spin_map))
|
|
/* Already started by OF and sitting in spin loop */
|
|
return 1;
|
|
|
|
pcpu = get_hard_smp_processor_id(lcpu);
|
|
|
|
/* Fixup atomic count: it exited inside IRQ handler. */
|
|
task_thread_info(paca_ptrs[lcpu]->__current)->preempt_count = 0;
|
|
|
|
/*
|
|
* If the RTAS start-cpu token does not exist then presume the
|
|
* cpu is already spinning.
|
|
*/
|
|
start_cpu = rtas_token("start-cpu");
|
|
if (start_cpu == RTAS_UNKNOWN_SERVICE)
|
|
return 1;
|
|
|
|
status = rtas_call(start_cpu, 3, 1, NULL, pcpu, start_here, lcpu);
|
|
if (status != 0) {
|
|
printk(KERN_ERR "start-cpu failed: %i\n", status);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void smp_cell_setup_cpu(int cpu)
|
|
{
|
|
if (cpu != boot_cpuid)
|
|
iic_setup_cpu();
|
|
|
|
/*
|
|
* change default DABRX to allow user watchpoints
|
|
*/
|
|
mtspr(SPRN_DABRX, DABRX_KERNEL | DABRX_USER);
|
|
}
|
|
|
|
static int smp_cell_kick_cpu(int nr)
|
|
{
|
|
if (nr < 0 || nr >= nr_cpu_ids)
|
|
return -EINVAL;
|
|
|
|
if (!smp_startup_cpu(nr))
|
|
return -ENOENT;
|
|
|
|
/*
|
|
* The processor is currently spinning, waiting for the
|
|
* cpu_start field to become non-zero After we set cpu_start,
|
|
* the processor will continue on to secondary_start
|
|
*/
|
|
paca_ptrs[nr]->cpu_start = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct smp_ops_t bpa_iic_smp_ops = {
|
|
.message_pass = iic_message_pass,
|
|
.probe = iic_request_IPIs,
|
|
.kick_cpu = smp_cell_kick_cpu,
|
|
.setup_cpu = smp_cell_setup_cpu,
|
|
.cpu_bootable = smp_generic_cpu_bootable,
|
|
};
|
|
|
|
/* This is called very early */
|
|
void __init smp_init_cell(void)
|
|
{
|
|
int i;
|
|
|
|
DBG(" -> smp_init_cell()\n");
|
|
|
|
smp_ops = &bpa_iic_smp_ops;
|
|
|
|
/* Mark threads which are still spinning in hold loops. */
|
|
if (cpu_has_feature(CPU_FTR_SMT)) {
|
|
for_each_present_cpu(i) {
|
|
if (cpu_thread_in_core(i) == 0)
|
|
cpumask_set_cpu(i, &of_spin_map);
|
|
}
|
|
} else
|
|
cpumask_copy(&of_spin_map, cpu_present_mask);
|
|
|
|
cpumask_clear_cpu(boot_cpuid, &of_spin_map);
|
|
|
|
/* Non-lpar has additional take/give timebase */
|
|
if (rtas_token("freeze-time-base") != RTAS_UNKNOWN_SERVICE) {
|
|
smp_ops->give_timebase = rtas_give_timebase;
|
|
smp_ops->take_timebase = rtas_take_timebase;
|
|
}
|
|
|
|
DBG(" <- smp_init_cell()\n");
|
|
}
|