2005-04-17 06:20:36 +08:00
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/*
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* pSeries_lpar.c
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* Copyright (C) 2001 Todd Inglett, IBM Corporation
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*
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* pSeries LPAR support.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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2008-04-24 13:13:19 +08:00
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/* Enables debugging of low-level hash table routines - careful! */
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#undef DEBUG
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2005-04-17 06:20:36 +08:00
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#include <linux/kernel.h>
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#include <linux/dma-mapping.h>
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2005-11-23 14:56:06 +08:00
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#include <linux/console.h>
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2011-05-27 22:46:24 +08:00
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|
#include <linux/export.h>
|
2015-04-09 11:51:32 +08:00
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|
#include <linux/jump_label.h>
|
2016-12-09 08:07:36 +08:00
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#include <linux/delay.h>
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#include <linux/stop_machine.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/processor.h>
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#include <asm/mmu.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/machdep.h>
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#include <asm/mmu_context.h>
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#include <asm/iommu.h>
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#include <asm/tlbflush.h>
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#include <asm/tlb.h>
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#include <asm/prom.h>
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#include <asm/cputable.h>
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2005-11-07 06:49:43 +08:00
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#include <asm/udbg.h>
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2005-11-07 10:18:13 +08:00
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#include <asm/smp.h>
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2009-10-27 02:50:29 +08:00
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#include <asm/trace.h>
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2012-03-16 02:18:00 +08:00
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#include <asm/firmware.h>
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2013-08-22 17:53:52 +08:00
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#include <asm/plpar_wrappers.h>
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2014-12-19 02:06:55 +08:00
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#include <asm/kexec.h>
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2014-10-01 15:02:30 +08:00
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#include <asm/fadump.h>
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2016-05-18 09:16:50 +08:00
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#include <asm/asm-prototypes.h>
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2005-11-03 12:33:31 +08:00
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2008-04-16 11:51:48 +08:00
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#include "pseries.h"
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2005-04-17 06:20:36 +08:00
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2013-06-20 17:00:27 +08:00
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/* Flag bits for H_BULK_REMOVE */
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#define HBR_REQUEST 0x4000000000000000UL
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#define HBR_RESPONSE 0x8000000000000000UL
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#define HBR_END 0xc000000000000000UL
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#define HBR_AVPN 0x0200000000000000UL
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#define HBR_ANDCOND 0x0100000000000000UL
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2005-04-17 06:20:36 +08:00
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2006-07-19 06:01:28 +08:00
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/* in hvCall.S */
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2005-04-17 06:20:36 +08:00
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EXPORT_SYMBOL(plpar_hcall);
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2006-07-19 06:01:28 +08:00
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EXPORT_SYMBOL(plpar_hcall9);
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2005-04-17 06:20:36 +08:00
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EXPORT_SYMBOL(plpar_hcall_norets);
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2006-07-19 06:01:28 +08:00
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2005-04-17 06:20:36 +08:00
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void vpa_init(int cpu)
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{
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int hwcpu = get_hard_smp_processor_id(cpu);
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2006-08-07 14:19:19 +08:00
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unsigned long addr;
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2005-04-17 06:20:36 +08:00
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long ret;
|
powerpc: Account time using timebase rather than PURR
Currently, when CONFIG_VIRT_CPU_ACCOUNTING is enabled, we use the
PURR register for measuring the user and system time used by
processes, as well as other related times such as hardirq and
softirq times. This turns out to be quite confusing for users
because it means that a program will often be measured as taking
less time when run on a multi-threaded processor (SMT2 or SMT4 mode)
than it does when run on a single-threaded processor (ST mode), even
though the program takes longer to finish. The discrepancy is
accounted for as stolen time, which is also confusing, particularly
when there are no other partitions running.
This changes the accounting to use the timebase instead, meaning that
the reported user and system times are the actual number of real-time
seconds that the program was executing on the processor thread,
regardless of which SMT mode the processor is in. Thus a program will
generally show greater user and system times when run on a
multi-threaded processor than on a single-threaded processor.
On pSeries systems on POWER5 or later processors, we measure the
stolen time (time when this partition wasn't running) using the
hypervisor dispatch trace log. We check for new entries in the
log on every entry from user mode and on every transition from
kernel process context to soft or hard IRQ context (i.e. when
account_system_vtime() gets called). So that we can correctly
distinguish time stolen from user time and time stolen from system
time, without having to check the log on every exit to user mode,
we store separate timestamps for exit to user mode and entry from
user mode.
On systems that have a SPURR (POWER6 and POWER7), we read the SPURR
in account_system_vtime() (as before), and then apportion the SPURR
ticks since the last time we read it between scaled user time and
scaled system time according to the relative proportions of user
time and system time over the same interval. This avoids having to
read the SPURR on every kernel entry and exit. On systems that have
PURR but not SPURR (i.e., POWER5), we do the same using the PURR
rather than the SPURR.
This disables the DTL user interface in /sys/debug/kernel/powerpc/dtl
for now since it conflicts with the use of the dispatch trace log
by the time accounting code.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-27 03:56:43 +08:00
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struct paca_struct *pp;
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struct dtl_entry *dtl;
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2005-09-04 06:55:59 +08:00
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|
2013-08-15 13:22:15 +08:00
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/*
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* The spec says it "may be problematic" if CPU x registers the VPA of
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* CPU y. We should never do that, but wail if we ever do.
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*/
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WARN_ON(cpu != smp_processor_id());
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|
2005-09-04 06:55:59 +08:00
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if (cpu_has_feature(CPU_FTR_ALTIVEC))
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2010-08-13 04:18:15 +08:00
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lppaca_of(cpu).vmxregs_in_use = 1;
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2005-09-04 06:55:59 +08:00
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|
2013-06-28 16:15:18 +08:00
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if (cpu_has_feature(CPU_FTR_ARCH_207S))
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lppaca_of(cpu).ebb_regs_in_use = 1;
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|
2010-08-13 04:18:15 +08:00
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addr = __pa(&lppaca_of(cpu));
|
2006-08-07 14:19:19 +08:00
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ret = register_vpa(hwcpu, addr);
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2005-04-17 06:20:36 +08:00
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|
2006-08-07 14:19:19 +08:00
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if (ret) {
|
2011-07-25 09:46:33 +08:00
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pr_err("WARNING: VPA registration for cpu %d (hw %d) of area "
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"%lx failed with %ld\n", cpu, hwcpu, addr, ret);
|
2006-08-07 14:19:19 +08:00
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return;
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|
|
|
}
|
2016-04-29 21:26:08 +08:00
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|
2017-10-19 12:08:43 +08:00
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#ifdef CONFIG_PPC_BOOK3S_64
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2006-08-07 14:19:19 +08:00
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/*
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* PAPR says this feature is SLB-Buffer but firmware never
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* reports that. All SPLPAR support SLB shadow buffer.
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*/
|
2016-04-29 21:26:08 +08:00
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if (!radix_enabled() && firmware_has_feature(FW_FEATURE_SPLPAR)) {
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addr = __pa(paca[cpu].slb_shadow_ptr);
|
2006-08-07 14:19:19 +08:00
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ret = register_slb_shadow(hwcpu, addr);
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if (ret)
|
2011-07-25 09:46:33 +08:00
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pr_err("WARNING: SLB shadow buffer registration for "
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"cpu %d (hw %d) of area %lx failed with %ld\n",
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cpu, hwcpu, addr, ret);
|
2006-08-07 14:19:19 +08:00
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|
}
|
2017-10-19 12:08:43 +08:00
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#endif /* CONFIG_PPC_BOOK3S_64 */
|
powerpc: Account time using timebase rather than PURR
Currently, when CONFIG_VIRT_CPU_ACCOUNTING is enabled, we use the
PURR register for measuring the user and system time used by
processes, as well as other related times such as hardirq and
softirq times. This turns out to be quite confusing for users
because it means that a program will often be measured as taking
less time when run on a multi-threaded processor (SMT2 or SMT4 mode)
than it does when run on a single-threaded processor (ST mode), even
though the program takes longer to finish. The discrepancy is
accounted for as stolen time, which is also confusing, particularly
when there are no other partitions running.
This changes the accounting to use the timebase instead, meaning that
the reported user and system times are the actual number of real-time
seconds that the program was executing on the processor thread,
regardless of which SMT mode the processor is in. Thus a program will
generally show greater user and system times when run on a
multi-threaded processor than on a single-threaded processor.
On pSeries systems on POWER5 or later processors, we measure the
stolen time (time when this partition wasn't running) using the
hypervisor dispatch trace log. We check for new entries in the
log on every entry from user mode and on every transition from
kernel process context to soft or hard IRQ context (i.e. when
account_system_vtime() gets called). So that we can correctly
distinguish time stolen from user time and time stolen from system
time, without having to check the log on every exit to user mode,
we store separate timestamps for exit to user mode and entry from
user mode.
On systems that have a SPURR (POWER6 and POWER7), we read the SPURR
in account_system_vtime() (as before), and then apportion the SPURR
ticks since the last time we read it between scaled user time and
scaled system time according to the relative proportions of user
time and system time over the same interval. This avoids having to
read the SPURR on every kernel entry and exit. On systems that have
PURR but not SPURR (i.e., POWER5), we do the same using the PURR
rather than the SPURR.
This disables the DTL user interface in /sys/debug/kernel/powerpc/dtl
for now since it conflicts with the use of the dispatch trace log
by the time accounting code.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-27 03:56:43 +08:00
|
|
|
|
|
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|
|
/*
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* Register dispatch trace log, if one has been allocated.
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*/
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|
pp = &paca[cpu];
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dtl = pp->dispatch_log;
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if (dtl) {
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|
pp->dtl_ridx = 0;
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|
pp->dtl_curr = dtl;
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|
|
lppaca_of(cpu).dtl_idx = 0;
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|
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|
|
|
/* hypervisor reads buffer length from this field */
|
2013-08-07 00:01:46 +08:00
|
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|
dtl->enqueue_to_dispatch_time = cpu_to_be32(DISPATCH_LOG_BYTES);
|
powerpc: Account time using timebase rather than PURR
Currently, when CONFIG_VIRT_CPU_ACCOUNTING is enabled, we use the
PURR register for measuring the user and system time used by
processes, as well as other related times such as hardirq and
softirq times. This turns out to be quite confusing for users
because it means that a program will often be measured as taking
less time when run on a multi-threaded processor (SMT2 or SMT4 mode)
than it does when run on a single-threaded processor (ST mode), even
though the program takes longer to finish. The discrepancy is
accounted for as stolen time, which is also confusing, particularly
when there are no other partitions running.
This changes the accounting to use the timebase instead, meaning that
the reported user and system times are the actual number of real-time
seconds that the program was executing on the processor thread,
regardless of which SMT mode the processor is in. Thus a program will
generally show greater user and system times when run on a
multi-threaded processor than on a single-threaded processor.
On pSeries systems on POWER5 or later processors, we measure the
stolen time (time when this partition wasn't running) using the
hypervisor dispatch trace log. We check for new entries in the
log on every entry from user mode and on every transition from
kernel process context to soft or hard IRQ context (i.e. when
account_system_vtime() gets called). So that we can correctly
distinguish time stolen from user time and time stolen from system
time, without having to check the log on every exit to user mode,
we store separate timestamps for exit to user mode and entry from
user mode.
On systems that have a SPURR (POWER6 and POWER7), we read the SPURR
in account_system_vtime() (as before), and then apportion the SPURR
ticks since the last time we read it between scaled user time and
scaled system time according to the relative proportions of user
time and system time over the same interval. This avoids having to
read the SPURR on every kernel entry and exit. On systems that have
PURR but not SPURR (i.e., POWER5), we do the same using the PURR
rather than the SPURR.
This disables the DTL user interface in /sys/debug/kernel/powerpc/dtl
for now since it conflicts with the use of the dispatch trace log
by the time accounting code.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-27 03:56:43 +08:00
|
|
|
ret = register_dtl(hwcpu, __pa(dtl));
|
|
|
|
|
if (ret)
|
2011-07-25 09:46:33 +08:00
|
|
|
pr_err("WARNING: DTL registration of cpu %d (hw %d) "
|
|
|
|
|
"failed with %ld\n", smp_processor_id(),
|
|
|
|
|
hwcpu, ret);
|
powerpc: Account time using timebase rather than PURR
Currently, when CONFIG_VIRT_CPU_ACCOUNTING is enabled, we use the
PURR register for measuring the user and system time used by
processes, as well as other related times such as hardirq and
softirq times. This turns out to be quite confusing for users
because it means that a program will often be measured as taking
less time when run on a multi-threaded processor (SMT2 or SMT4 mode)
than it does when run on a single-threaded processor (ST mode), even
though the program takes longer to finish. The discrepancy is
accounted for as stolen time, which is also confusing, particularly
when there are no other partitions running.
This changes the accounting to use the timebase instead, meaning that
the reported user and system times are the actual number of real-time
seconds that the program was executing on the processor thread,
regardless of which SMT mode the processor is in. Thus a program will
generally show greater user and system times when run on a
multi-threaded processor than on a single-threaded processor.
On pSeries systems on POWER5 or later processors, we measure the
stolen time (time when this partition wasn't running) using the
hypervisor dispatch trace log. We check for new entries in the
log on every entry from user mode and on every transition from
kernel process context to soft or hard IRQ context (i.e. when
account_system_vtime() gets called). So that we can correctly
distinguish time stolen from user time and time stolen from system
time, without having to check the log on every exit to user mode,
we store separate timestamps for exit to user mode and entry from
user mode.
On systems that have a SPURR (POWER6 and POWER7), we read the SPURR
in account_system_vtime() (as before), and then apportion the SPURR
ticks since the last time we read it between scaled user time and
scaled system time according to the relative proportions of user
time and system time over the same interval. This avoids having to
read the SPURR on every kernel entry and exit. On systems that have
PURR but not SPURR (i.e., POWER5), we do the same using the PURR
rather than the SPURR.
This disables the DTL user interface in /sys/debug/kernel/powerpc/dtl
for now since it conflicts with the use of the dispatch trace log
by the time accounting code.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-27 03:56:43 +08:00
|
|
|
lppaca_of(cpu).dtl_enable_mask = 2;
|
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
2017-10-19 12:08:43 +08:00
|
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
2016-04-29 21:26:08 +08:00
|
|
|
|
2006-10-06 02:35:10 +08:00
|
|
|
static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
|
2012-09-10 10:52:50 +08:00
|
|
|
unsigned long vpn, unsigned long pa,
|
|
|
|
|
unsigned long rflags, unsigned long vflags,
|
2013-04-28 17:37:35 +08:00
|
|
|
int psize, int apsize, int ssize)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
|
unsigned long lpar_rc;
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
unsigned long slot;
|
2005-07-13 16:11:42 +08:00
|
|
|
unsigned long hpte_v, hpte_r;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-11-07 08:06:55 +08:00
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
2012-09-10 10:52:50 +08:00
|
|
|
pr_devel("hpte_insert(group=%lx, vpn=%016lx, "
|
|
|
|
|
"pa=%016lx, rflags=%lx, vflags=%lx, psize=%d)\n",
|
|
|
|
|
hpte_group, vpn, pa, rflags, vflags, psize);
|
2005-11-07 08:06:55 +08:00
|
|
|
|
2013-04-28 17:37:35 +08:00
|
|
|
hpte_v = hpte_encode_v(vpn, psize, apsize, ssize) | vflags | HPTE_V_VALID;
|
2016-11-11 13:55:03 +08:00
|
|
|
hpte_r = hpte_encode_r(pa, psize, apsize) | rflags;
|
2005-11-07 08:06:55 +08:00
|
|
|
|
|
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
2009-06-18 02:13:50 +08:00
|
|
|
pr_devel(" hpte_v=%016lx, hpte_r=%016lx\n", hpte_v, hpte_r);
|
2005-11-07 08:06:55 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Now fill in the actual HPTE */
|
|
|
|
|
/* Set CEC cookie to 0 */
|
|
|
|
|
/* Zero page = 0 */
|
|
|
|
|
/* I-cache Invalidate = 0 */
|
|
|
|
|
/* I-cache synchronize = 0 */
|
|
|
|
|
/* Exact = 0 */
|
|
|
|
|
flags = 0;
|
|
|
|
|
|
2011-05-04 14:01:20 +08:00
|
|
|
if (firmware_has_feature(FW_FEATURE_XCMO) && !(hpte_r & HPTE_R_N))
|
|
|
|
|
flags |= H_COALESCE_CAND;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-07-19 06:01:28 +08:00
|
|
|
lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);
|
2006-03-30 20:49:40 +08:00
|
|
|
if (unlikely(lpar_rc == H_PTEG_FULL)) {
|
2005-11-07 08:06:55 +08:00
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
2009-06-18 02:13:50 +08:00
|
|
|
pr_devel(" full\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return -1;
|
2005-11-07 08:06:55 +08:00
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Since we try and ioremap PHBs we don't own, the pte insert
|
|
|
|
|
* will fail. However we must catch the failure in hash_page
|
|
|
|
|
* or we will loop forever, so return -2 in this case.
|
|
|
|
|
*/
|
2006-03-30 20:49:40 +08:00
|
|
|
if (unlikely(lpar_rc != H_SUCCESS)) {
|
2005-11-07 08:06:55 +08:00
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
2013-04-28 17:37:25 +08:00
|
|
|
pr_devel(" lpar err %ld\n", lpar_rc);
|
2005-04-17 06:20:36 +08:00
|
|
|
return -2;
|
2005-11-07 08:06:55 +08:00
|
|
|
}
|
|
|
|
|
if (!(vflags & HPTE_V_BOLTED))
|
2009-06-18 02:13:50 +08:00
|
|
|
pr_devel(" -> slot: %lu\n", slot & 7);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
/* Because of iSeries, we have to pass down the secondary
|
|
|
|
|
* bucket bit here as well
|
|
|
|
|
*/
|
2005-07-13 16:11:42 +08:00
|
|
|
return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock);
|
|
|
|
|
|
|
|
|
|
static long pSeries_lpar_hpte_remove(unsigned long hpte_group)
|
|
|
|
|
{
|
|
|
|
|
unsigned long slot_offset;
|
|
|
|
|
unsigned long lpar_rc;
|
|
|
|
|
int i;
|
|
|
|
|
unsigned long dummy1, dummy2;
|
|
|
|
|
|
|
|
|
|
/* pick a random slot to start at */
|
|
|
|
|
slot_offset = mftb() & 0x7;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < HPTES_PER_GROUP; i++) {
|
|
|
|
|
|
|
|
|
|
/* don't remove a bolted entry */
|
|
|
|
|
lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset,
|
|
|
|
|
(0x1UL << 4), &dummy1, &dummy2);
|
2006-03-30 20:49:40 +08:00
|
|
|
if (lpar_rc == H_SUCCESS)
|
2005-04-17 06:20:36 +08:00
|
|
|
return i;
|
2013-04-05 18:41:40 +08:00
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* The test for adjunct partition is performed before the
|
|
|
|
|
* ANDCOND test. H_RESOURCE may be returned, so we need to
|
|
|
|
|
* check for that as well.
|
|
|
|
|
*/
|
|
|
|
|
BUG_ON(lpar_rc != H_NOT_FOUND && lpar_rc != H_RESOURCE);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
slot_offset++;
|
|
|
|
|
slot_offset &= 0x7;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return -1;
|
|
|
|
|
}
|
|
|
|
|
|
2016-10-01 18:41:56 +08:00
|
|
|
static void manual_hpte_clear_all(void)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
|
unsigned long size_bytes = 1UL << ppc64_pft_size;
|
|
|
|
|
unsigned long hpte_count = size_bytes >> 4;
|
2010-05-11 04:28:26 +08:00
|
|
|
struct {
|
|
|
|
|
unsigned long pteh;
|
|
|
|
|
unsigned long ptel;
|
|
|
|
|
} ptes[4];
|
2007-06-14 13:31:34 +08:00
|
|
|
long lpar_rc;
|
2011-07-27 02:15:03 +08:00
|
|
|
unsigned long i, j;
|
2010-05-11 04:28:26 +08:00
|
|
|
|
|
|
|
|
/* Read in batches of 4,
|
|
|
|
|
* invalidate only valid entries not in the VRMA
|
|
|
|
|
* hpte_count will be a multiple of 4
|
|
|
|
|
*/
|
|
|
|
|
for (i = 0; i < hpte_count; i += 4) {
|
|
|
|
|
lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes);
|
|
|
|
|
if (lpar_rc != H_SUCCESS)
|
|
|
|
|
continue;
|
|
|
|
|
for (j = 0; j < 4; j++){
|
|
|
|
|
if ((ptes[j].pteh & HPTE_V_VRMA_MASK) ==
|
|
|
|
|
HPTE_V_VRMA_MASK)
|
|
|
|
|
continue;
|
|
|
|
|
if (ptes[j].pteh & HPTE_V_VALID)
|
|
|
|
|
plpar_pte_remove_raw(0, i + j, 0,
|
|
|
|
|
&(ptes[j].pteh), &(ptes[j].ptel));
|
2007-06-14 13:31:34 +08:00
|
|
|
}
|
|
|
|
|
}
|
2016-10-01 18:41:56 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int hcall_hpte_clear_all(void)
|
|
|
|
|
{
|
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
|
|
do {
|
|
|
|
|
rc = plpar_hcall_norets(H_CLEAR_HPT);
|
|
|
|
|
} while (rc == H_CONTINUE);
|
|
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void pseries_hpte_clear_all(void)
|
|
|
|
|
{
|
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
|
|
rc = hcall_hpte_clear_all();
|
|
|
|
|
if (rc != H_SUCCESS)
|
|
|
|
|
manual_hpte_clear_all();
|
2013-11-20 19:14:59 +08:00
|
|
|
|
|
|
|
|
#ifdef __LITTLE_ENDIAN__
|
2014-10-01 15:02:30 +08:00
|
|
|
/*
|
|
|
|
|
* Reset exceptions to big endian.
|
|
|
|
|
*
|
|
|
|
|
* FIXME this is a hack for kexec, we need to reset the exception
|
|
|
|
|
* endian before starting the new kernel and this is a convenient place
|
|
|
|
|
* to do it.
|
|
|
|
|
*
|
|
|
|
|
* This is also called on boot when a fadump happens. In that case we
|
|
|
|
|
* must not change the exception endian mode.
|
|
|
|
|
*/
|
2016-07-05 13:03:49 +08:00
|
|
|
if (firmware_has_feature(FW_FEATURE_SET_MODE) && !is_fadump_active())
|
|
|
|
|
pseries_big_endian_exceptions();
|
2013-11-20 19:14:59 +08:00
|
|
|
#endif
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
|
|
|
|
|
* the low 3 bits of flags happen to line up. So no transform is needed.
|
|
|
|
|
* We can probably optimize here and assume the high bits of newpp are
|
|
|
|
|
* already zero. For now I am paranoid.
|
|
|
|
|
*/
|
2005-11-07 08:06:55 +08:00
|
|
|
static long pSeries_lpar_hpte_updatepp(unsigned long slot,
|
|
|
|
|
unsigned long newpp,
|
2012-09-10 10:52:50 +08:00
|
|
|
unsigned long vpn,
|
2013-06-20 17:00:13 +08:00
|
|
|
int psize, int apsize,
|
2014-12-04 13:30:14 +08:00
|
|
|
int ssize, unsigned long inv_flags)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
|
unsigned long lpar_rc;
|
powerpc/pseries: Fix passing of pp0 in updatepp() and updateboltedpp()
Once upon a time there were only two PP (page protection) bits. In ISA
2.03 an additional PP bit was added, but because of the layout of the
HPTE it could not be made contiguous with the existing PP bits.
The result is that we now have three PP bits, named pp0, pp1, pp2,
where pp0 occupies bit 63 of dword 1 of the HPTE and pp1 and pp2
occupy bits 1 and 0 respectively. Until recently Linux hasn't used
pp0, however with the addition of _PAGE_KERNEL_RO we started using it.
The problem arises in the LPAR code, where we need to translate the PP
bits into the argument for the H_PROTECT hypercall. Currently the code
only passes bits 0-2 of newpp, which covers pp1, pp2 and N (no
execute), meaning pp0 is not passed to the hypervisor at all.
We can't simply pass it through in bit 63, as that would collide with a
different field in the flags argument, as defined in PAPR. Instead we
have to shift it down to bit 8 (IBM bit 55).
Fixes: e58e87adc8bf ("powerpc/mm: Update _PAGE_KERNEL_RO")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
[mpe: Simplify the test, rework change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-29 01:04:07 +08:00
|
|
|
unsigned long flags;
|
2005-11-07 08:06:55 +08:00
|
|
|
unsigned long want_v;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-09-10 10:52:50 +08:00
|
|
|
want_v = hpte_encode_avpn(vpn, psize, ssize);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-06-18 02:13:50 +08:00
|
|
|
pr_devel(" update: avpnv=%016lx, hash=%016lx, f=%lx, psize: %d ...",
|
2008-04-24 13:13:19 +08:00
|
|
|
want_v, slot, flags, psize);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
powerpc/pseries: Fix passing of pp0 in updatepp() and updateboltedpp()
Once upon a time there were only two PP (page protection) bits. In ISA
2.03 an additional PP bit was added, but because of the layout of the
HPTE it could not be made contiguous with the existing PP bits.
The result is that we now have three PP bits, named pp0, pp1, pp2,
where pp0 occupies bit 63 of dword 1 of the HPTE and pp1 and pp2
occupy bits 1 and 0 respectively. Until recently Linux hasn't used
pp0, however with the addition of _PAGE_KERNEL_RO we started using it.
The problem arises in the LPAR code, where we need to translate the PP
bits into the argument for the H_PROTECT hypercall. Currently the code
only passes bits 0-2 of newpp, which covers pp1, pp2 and N (no
execute), meaning pp0 is not passed to the hypervisor at all.
We can't simply pass it through in bit 63, as that would collide with a
different field in the flags argument, as defined in PAPR. Instead we
have to shift it down to bit 8 (IBM bit 55).
Fixes: e58e87adc8bf ("powerpc/mm: Update _PAGE_KERNEL_RO")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
[mpe: Simplify the test, rework change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-29 01:04:07 +08:00
|
|
|
flags = (newpp & 7) | H_AVPN;
|
|
|
|
|
if (mmu_has_feature(MMU_FTR_KERNEL_RO))
|
|
|
|
|
/* Move pp0 into bit 8 (IBM 55) */
|
|
|
|
|
flags |= (newpp & HPTE_R_PP0) >> 55;
|
|
|
|
|
|
2007-10-11 18:37:10 +08:00
|
|
|
lpar_rc = plpar_pte_protect(flags, slot, want_v);
|
2005-11-07 08:06:55 +08:00
|
|
|
|
2006-03-30 20:49:40 +08:00
|
|
|
if (lpar_rc == H_NOT_FOUND) {
|
2009-06-18 02:13:50 +08:00
|
|
|
pr_devel("not found !\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
return -1;
|
2005-11-07 08:06:55 +08:00
|
|
|
}
|
|
|
|
|
|
2009-06-18 02:13:50 +08:00
|
|
|
pr_devel("ok\n");
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-03-30 20:49:40 +08:00
|
|
|
BUG_ON(lpar_rc != H_SUCCESS);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2015-12-01 11:36:59 +08:00
|
|
|
static long __pSeries_lpar_hpte_find(unsigned long want_v, unsigned long hpte_group)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2015-12-01 11:36:59 +08:00
|
|
|
long lpar_rc;
|
|
|
|
|
unsigned long i, j;
|
|
|
|
|
struct {
|
|
|
|
|
unsigned long pteh;
|
|
|
|
|
unsigned long ptel;
|
|
|
|
|
} ptes[4];
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2015-12-01 11:36:59 +08:00
|
|
|
for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) {
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2015-12-01 11:36:59 +08:00
|
|
|
lpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes);
|
|
|
|
|
if (lpar_rc != H_SUCCESS)
|
|
|
|
|
continue;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2015-12-01 11:36:59 +08:00
|
|
|
for (j = 0; j < 4; j++) {
|
|
|
|
|
if (HPTE_V_COMPARE(ptes[j].pteh, want_v) &&
|
|
|
|
|
(ptes[j].pteh & HPTE_V_VALID))
|
|
|
|
|
return i + j;
|
|
|
|
|
}
|
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2015-12-01 11:36:59 +08:00
|
|
|
return -1;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
2012-09-10 10:52:50 +08:00
|
|
|
static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
|
long slot;
|
2015-12-01 11:36:59 +08:00
|
|
|
unsigned long hash;
|
|
|
|
|
unsigned long want_v;
|
|
|
|
|
unsigned long hpte_group;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-09-10 10:52:50 +08:00
|
|
|
hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize);
|
|
|
|
|
want_v = hpte_encode_avpn(vpn, psize, ssize);
|
2007-10-11 18:37:10 +08:00
|
|
|
|
|
|
|
|
/* Bolted entries are always in the primary group */
|
2015-12-01 11:36:59 +08:00
|
|
|
hpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP;
|
|
|
|
|
slot = __pSeries_lpar_hpte_find(want_v, hpte_group);
|
|
|
|
|
if (slot < 0)
|
|
|
|
|
return -1;
|
|
|
|
|
return hpte_group + slot;
|
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
|
2005-11-07 08:06:55 +08:00
|
|
|
unsigned long ea,
|
2007-10-11 18:37:10 +08:00
|
|
|
int psize, int ssize)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2012-09-10 10:52:50 +08:00
|
|
|
unsigned long vpn;
|
|
|
|
|
unsigned long lpar_rc, slot, vsid, flags;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2007-10-11 18:37:10 +08:00
|
|
|
vsid = get_kernel_vsid(ea, ssize);
|
2012-09-10 10:52:50 +08:00
|
|
|
vpn = hpt_vpn(ea, vsid, ssize);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-09-10 10:52:50 +08:00
|
|
|
slot = pSeries_lpar_hpte_find(vpn, psize, ssize);
|
2005-04-17 06:20:36 +08:00
|
|
|
BUG_ON(slot == -1);
|
|
|
|
|
|
|
|
|
|
flags = newpp & 7;
|
powerpc/pseries: Fix passing of pp0 in updatepp() and updateboltedpp()
Once upon a time there were only two PP (page protection) bits. In ISA
2.03 an additional PP bit was added, but because of the layout of the
HPTE it could not be made contiguous with the existing PP bits.
The result is that we now have three PP bits, named pp0, pp1, pp2,
where pp0 occupies bit 63 of dword 1 of the HPTE and pp1 and pp2
occupy bits 1 and 0 respectively. Until recently Linux hasn't used
pp0, however with the addition of _PAGE_KERNEL_RO we started using it.
The problem arises in the LPAR code, where we need to translate the PP
bits into the argument for the H_PROTECT hypercall. Currently the code
only passes bits 0-2 of newpp, which covers pp1, pp2 and N (no
execute), meaning pp0 is not passed to the hypervisor at all.
We can't simply pass it through in bit 63, as that would collide with a
different field in the flags argument, as defined in PAPR. Instead we
have to shift it down to bit 8 (IBM bit 55).
Fixes: e58e87adc8bf ("powerpc/mm: Update _PAGE_KERNEL_RO")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
[mpe: Simplify the test, rework change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-29 01:04:07 +08:00
|
|
|
if (mmu_has_feature(MMU_FTR_KERNEL_RO))
|
|
|
|
|
/* Move pp0 into bit 8 (IBM 55) */
|
|
|
|
|
flags |= (newpp & HPTE_R_PP0) >> 55;
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
lpar_rc = plpar_pte_protect(flags, slot, 0);
|
|
|
|
|
|
2006-03-30 20:49:40 +08:00
|
|
|
BUG_ON(lpar_rc != H_SUCCESS);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
2012-09-10 10:52:50 +08:00
|
|
|
static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn,
|
2013-06-20 17:00:13 +08:00
|
|
|
int psize, int apsize,
|
|
|
|
|
int ssize, int local)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-11-07 08:06:55 +08:00
|
|
|
unsigned long want_v;
|
2005-04-17 06:20:36 +08:00
|
|
|
unsigned long lpar_rc;
|
|
|
|
|
unsigned long dummy1, dummy2;
|
|
|
|
|
|
2012-09-10 10:52:50 +08:00
|
|
|
pr_devel(" inval : slot=%lx, vpn=%016lx, psize: %d, local: %d\n",
|
|
|
|
|
slot, vpn, psize, local);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-09-10 10:52:50 +08:00
|
|
|
want_v = hpte_encode_avpn(vpn, psize, ssize);
|
2007-10-11 18:37:10 +08:00
|
|
|
lpar_rc = plpar_pte_remove(H_AVPN, slot, want_v, &dummy1, &dummy2);
|
2006-03-30 20:49:40 +08:00
|
|
|
if (lpar_rc == H_NOT_FOUND)
|
2005-04-17 06:20:36 +08:00
|
|
|
return;
|
|
|
|
|
|
2006-03-30 20:49:40 +08:00
|
|
|
BUG_ON(lpar_rc != H_SUCCESS);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
2015-12-01 11:36:53 +08:00
|
|
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
2013-06-20 17:00:27 +08:00
|
|
|
/*
|
|
|
|
|
* Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need
|
|
|
|
|
* to make sure that we avoid bouncing the hypervisor tlbie lock.
|
|
|
|
|
*/
|
|
|
|
|
#define PPC64_HUGE_HPTE_BATCH 12
|
|
|
|
|
|
|
|
|
|
static void __pSeries_lpar_hugepage_invalidate(unsigned long *slot,
|
|
|
|
|
unsigned long *vpn, int count,
|
|
|
|
|
int psize, int ssize)
|
|
|
|
|
{
|
2016-10-06 21:33:21 +08:00
|
|
|
unsigned long param[PLPAR_HCALL9_BUFSIZE];
|
2013-06-20 17:00:27 +08:00
|
|
|
int i = 0, pix = 0, rc;
|
|
|
|
|
unsigned long flags = 0;
|
|
|
|
|
int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
|
|
|
|
|
|
|
|
|
|
if (lock_tlbie)
|
|
|
|
|
spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < count; i++) {
|
|
|
|
|
|
|
|
|
|
if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
|
|
|
|
|
pSeries_lpar_hpte_invalidate(slot[i], vpn[i], psize, 0,
|
|
|
|
|
ssize, 0);
|
|
|
|
|
} else {
|
|
|
|
|
param[pix] = HBR_REQUEST | HBR_AVPN | slot[i];
|
|
|
|
|
param[pix+1] = hpte_encode_avpn(vpn[i], psize, ssize);
|
|
|
|
|
pix += 2;
|
|
|
|
|
if (pix == 8) {
|
|
|
|
|
rc = plpar_hcall9(H_BULK_REMOVE, param,
|
|
|
|
|
param[0], param[1], param[2],
|
|
|
|
|
param[3], param[4], param[5],
|
|
|
|
|
param[6], param[7]);
|
|
|
|
|
BUG_ON(rc != H_SUCCESS);
|
|
|
|
|
pix = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
if (pix) {
|
|
|
|
|
param[pix] = HBR_END;
|
|
|
|
|
rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1],
|
|
|
|
|
param[2], param[3], param[4], param[5],
|
|
|
|
|
param[6], param[7]);
|
|
|
|
|
BUG_ON(rc != H_SUCCESS);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (lock_tlbie)
|
|
|
|
|
spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
|
|
|
|
|
}
|
|
|
|
|
|
2014-08-13 15:01:58 +08:00
|
|
|
static void pSeries_lpar_hugepage_invalidate(unsigned long vsid,
|
|
|
|
|
unsigned long addr,
|
|
|
|
|
unsigned char *hpte_slot_array,
|
2014-11-02 23:45:28 +08:00
|
|
|
int psize, int ssize, int local)
|
2013-06-20 17:00:27 +08:00
|
|
|
{
|
2014-08-13 15:01:58 +08:00
|
|
|
int i, index = 0;
|
2013-06-20 17:00:27 +08:00
|
|
|
unsigned long s_addr = addr;
|
|
|
|
|
unsigned int max_hpte_count, valid;
|
|
|
|
|
unsigned long vpn_array[PPC64_HUGE_HPTE_BATCH];
|
|
|
|
|
unsigned long slot_array[PPC64_HUGE_HPTE_BATCH];
|
2014-08-13 15:01:58 +08:00
|
|
|
unsigned long shift, hidx, vpn = 0, hash, slot;
|
2013-06-20 17:00:27 +08:00
|
|
|
|
|
|
|
|
shift = mmu_psize_defs[psize].shift;
|
|
|
|
|
max_hpte_count = 1U << (PMD_SHIFT - shift);
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < max_hpte_count; i++) {
|
|
|
|
|
valid = hpte_valid(hpte_slot_array, i);
|
|
|
|
|
if (!valid)
|
|
|
|
|
continue;
|
|
|
|
|
hidx = hpte_hash_index(hpte_slot_array, i);
|
|
|
|
|
|
|
|
|
|
/* get the vpn */
|
|
|
|
|
addr = s_addr + (i * (1ul << shift));
|
|
|
|
|
vpn = hpt_vpn(addr, vsid, ssize);
|
|
|
|
|
hash = hpt_hash(vpn, shift, ssize);
|
|
|
|
|
if (hidx & _PTEIDX_SECONDARY)
|
|
|
|
|
hash = ~hash;
|
|
|
|
|
|
|
|
|
|
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
|
|
|
|
|
slot += hidx & _PTEIDX_GROUP_IX;
|
|
|
|
|
|
|
|
|
|
slot_array[index] = slot;
|
|
|
|
|
vpn_array[index] = vpn;
|
|
|
|
|
if (index == PPC64_HUGE_HPTE_BATCH - 1) {
|
|
|
|
|
/*
|
|
|
|
|
* Now do a bluk invalidate
|
|
|
|
|
*/
|
|
|
|
|
__pSeries_lpar_hugepage_invalidate(slot_array,
|
|
|
|
|
vpn_array,
|
|
|
|
|
PPC64_HUGE_HPTE_BATCH,
|
|
|
|
|
psize, ssize);
|
|
|
|
|
index = 0;
|
|
|
|
|
} else
|
|
|
|
|
index++;
|
|
|
|
|
}
|
|
|
|
|
if (index)
|
|
|
|
|
__pSeries_lpar_hugepage_invalidate(slot_array, vpn_array,
|
|
|
|
|
index, psize, ssize);
|
|
|
|
|
}
|
2015-12-01 11:36:53 +08:00
|
|
|
#else
|
|
|
|
|
static void pSeries_lpar_hugepage_invalidate(unsigned long vsid,
|
|
|
|
|
unsigned long addr,
|
|
|
|
|
unsigned char *hpte_slot_array,
|
|
|
|
|
int psize, int ssize, int local)
|
|
|
|
|
{
|
|
|
|
|
WARN(1, "%s called without THP support\n", __func__);
|
|
|
|
|
}
|
|
|
|
|
#endif
|
2013-06-20 17:00:27 +08:00
|
|
|
|
2016-02-09 11:32:41 +08:00
|
|
|
static int pSeries_lpar_hpte_removebolted(unsigned long ea,
|
|
|
|
|
int psize, int ssize)
|
2008-01-29 06:19:24 +08:00
|
|
|
{
|
2012-09-10 10:52:50 +08:00
|
|
|
unsigned long vpn;
|
|
|
|
|
unsigned long slot, vsid;
|
2008-01-29 06:19:24 +08:00
|
|
|
|
|
|
|
|
vsid = get_kernel_vsid(ea, ssize);
|
2012-09-10 10:52:50 +08:00
|
|
|
vpn = hpt_vpn(ea, vsid, ssize);
|
2008-01-29 06:19:24 +08:00
|
|
|
|
2012-09-10 10:52:50 +08:00
|
|
|
slot = pSeries_lpar_hpte_find(vpn, psize, ssize);
|
2016-02-09 11:32:41 +08:00
|
|
|
if (slot == -1)
|
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
2013-06-20 17:00:13 +08:00
|
|
|
/*
|
|
|
|
|
* lpar doesn't use the passed actual page size
|
|
|
|
|
*/
|
|
|
|
|
pSeries_lpar_hpte_invalidate(slot, vpn, psize, 0, ssize, 0);
|
2016-02-09 11:32:41 +08:00
|
|
|
return 0;
|
2008-01-29 06:19:24 +08:00
|
|
|
}
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
|
|
|
|
* Take a spinlock around flushes to avoid bouncing the hypervisor tlbie
|
|
|
|
|
* lock.
|
|
|
|
|
*/
|
2006-10-06 02:35:10 +08:00
|
|
|
static void pSeries_lpar_flush_hash_range(unsigned long number, int local)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2012-09-10 10:52:50 +08:00
|
|
|
unsigned long vpn;
|
2007-02-06 18:10:31 +08:00
|
|
|
unsigned long i, pix, rc;
|
2007-02-08 12:02:35 +08:00
|
|
|
unsigned long flags = 0;
|
powerpc: Replace __get_cpu_var uses
This still has not been merged and now powerpc is the only arch that does
not have this change. Sorry about missing linuxppc-dev before.
V2->V2
- Fix up to work against 3.18-rc1
__get_cpu_var() is used for multiple purposes in the kernel source. One of
them is address calculation via the form &__get_cpu_var(x). This calculates
the address for the instance of the percpu variable of the current processor
based on an offset.
Other use cases are for storing and retrieving data from the current
processors percpu area. __get_cpu_var() can be used as an lvalue when
writing data or on the right side of an assignment.
__get_cpu_var() is defined as :
__get_cpu_var() always only does an address determination. However, store
and retrieve operations could use a segment prefix (or global register on
other platforms) to avoid the address calculation.
this_cpu_write() and this_cpu_read() can directly take an offset into a
percpu area and use optimized assembly code to read and write per cpu
variables.
This patch converts __get_cpu_var into either an explicit address
calculation using this_cpu_ptr() or into a use of this_cpu operations that
use the offset. Thereby address calculations are avoided and less registers
are used when code is generated.
At the end of the patch set all uses of __get_cpu_var have been removed so
the macro is removed too.
The patch set includes passes over all arches as well. Once these operations
are used throughout then specialized macros can be defined in non -x86
arches as well in order to optimize per cpu access by f.e. using a global
register that may be set to the per cpu base.
Transformations done to __get_cpu_var()
1. Determine the address of the percpu instance of the current processor.
DEFINE_PER_CPU(int, y);
int *x = &__get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(&y);
2. Same as #1 but this time an array structure is involved.
DEFINE_PER_CPU(int, y[20]);
int *x = __get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(y);
3. Retrieve the content of the current processors instance of a per cpu
variable.
DEFINE_PER_CPU(int, y);
int x = __get_cpu_var(y)
Converts to
int x = __this_cpu_read(y);
4. Retrieve the content of a percpu struct
DEFINE_PER_CPU(struct mystruct, y);
struct mystruct x = __get_cpu_var(y);
Converts to
memcpy(&x, this_cpu_ptr(&y), sizeof(x));
5. Assignment to a per cpu variable
DEFINE_PER_CPU(int, y)
__get_cpu_var(y) = x;
Converts to
__this_cpu_write(y, x);
6. Increment/Decrement etc of a per cpu variable
DEFINE_PER_CPU(int, y);
__get_cpu_var(y)++
Converts to
__this_cpu_inc(y)
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
Signed-off-by: Christoph Lameter <cl@linux.com>
[mpe: Fix build errors caused by set/or_softirq_pending(), and rework
assignment in __set_breakpoint() to use memcpy().]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-10-22 04:23:25 +08:00
|
|
|
struct ppc64_tlb_batch *batch = this_cpu_ptr(&ppc64_tlb_batch);
|
2011-04-07 03:48:50 +08:00
|
|
|
int lock_tlbie = !mmu_has_feature(MMU_FTR_LOCKLESS_TLBIE);
|
2016-10-06 21:33:21 +08:00
|
|
|
unsigned long param[PLPAR_HCALL9_BUFSIZE];
|
2007-02-06 18:10:31 +08:00
|
|
|
unsigned long hash, index, shift, hidx, slot;
|
|
|
|
|
real_pte_t pte;
|
2007-10-11 18:37:10 +08:00
|
|
|
int psize, ssize;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
if (lock_tlbie)
|
|
|
|
|
spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
|
|
|
|
|
|
2007-02-06 18:10:31 +08:00
|
|
|
psize = batch->psize;
|
2007-10-11 18:37:10 +08:00
|
|
|
ssize = batch->ssize;
|
2007-02-06 18:10:31 +08:00
|
|
|
pix = 0;
|
|
|
|
|
for (i = 0; i < number; i++) {
|
2012-09-10 10:52:50 +08:00
|
|
|
vpn = batch->vpn[i];
|
2007-02-06 18:10:31 +08:00
|
|
|
pte = batch->pte[i];
|
2012-09-10 10:52:50 +08:00
|
|
|
pte_iterate_hashed_subpages(pte, psize, vpn, index, shift) {
|
|
|
|
|
hash = hpt_hash(vpn, shift, ssize);
|
2007-02-06 18:10:31 +08:00
|
|
|
hidx = __rpte_to_hidx(pte, index);
|
|
|
|
|
if (hidx & _PTEIDX_SECONDARY)
|
|
|
|
|
hash = ~hash;
|
|
|
|
|
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
|
|
|
|
|
slot += hidx & _PTEIDX_GROUP_IX;
|
2007-02-08 12:02:35 +08:00
|
|
|
if (!firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
|
2013-06-20 17:00:13 +08:00
|
|
|
/*
|
|
|
|
|
* lpar doesn't use the passed actual page size
|
|
|
|
|
*/
|
2012-09-10 10:52:50 +08:00
|
|
|
pSeries_lpar_hpte_invalidate(slot, vpn, psize,
|
2013-06-20 17:00:13 +08:00
|
|
|
0, ssize, local);
|
2007-02-08 12:02:35 +08:00
|
|
|
} else {
|
|
|
|
|
param[pix] = HBR_REQUEST | HBR_AVPN | slot;
|
2012-09-10 10:52:50 +08:00
|
|
|
param[pix+1] = hpte_encode_avpn(vpn, psize,
|
2007-10-11 18:37:10 +08:00
|
|
|
ssize);
|
2007-02-08 12:02:35 +08:00
|
|
|
pix += 2;
|
|
|
|
|
if (pix == 8) {
|
|
|
|
|
rc = plpar_hcall9(H_BULK_REMOVE, param,
|
2007-02-06 18:10:31 +08:00
|
|
|
param[0], param[1], param[2],
|
|
|
|
|
param[3], param[4], param[5],
|
|
|
|
|
param[6], param[7]);
|
2007-02-08 12:02:35 +08:00
|
|
|
BUG_ON(rc != H_SUCCESS);
|
|
|
|
|
pix = 0;
|
|
|
|
|
}
|
2007-02-06 18:10:31 +08:00
|
|
|
}
|
|
|
|
|
} pte_iterate_hashed_end();
|
|
|
|
|
}
|
|
|
|
|
if (pix) {
|
|
|
|
|
param[pix] = HBR_END;
|
|
|
|
|
rc = plpar_hcall9(H_BULK_REMOVE, param, param[0], param[1],
|
|
|
|
|
param[2], param[3], param[4], param[5],
|
|
|
|
|
param[6], param[7]);
|
|
|
|
|
BUG_ON(rc != H_SUCCESS);
|
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
if (lock_tlbie)
|
|
|
|
|
spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
|
|
|
|
|
}
|
|
|
|
|
|
2010-09-28 23:33:12 +08:00
|
|
|
static int __init disable_bulk_remove(char *str)
|
|
|
|
|
{
|
|
|
|
|
if (strcmp(str, "off") == 0 &&
|
|
|
|
|
firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
|
|
|
|
|
printk(KERN_INFO "Disabling BULK_REMOVE firmware feature");
|
|
|
|
|
powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE;
|
|
|
|
|
}
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
__setup("bulk_remove=", disable_bulk_remove);
|
|
|
|
|
|
2016-12-09 08:07:36 +08:00
|
|
|
#define HPT_RESIZE_TIMEOUT 10000 /* ms */
|
|
|
|
|
|
|
|
|
|
struct hpt_resize_state {
|
|
|
|
|
unsigned long shift;
|
|
|
|
|
int commit_rc;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static int pseries_lpar_resize_hpt_commit(void *data)
|
|
|
|
|
{
|
|
|
|
|
struct hpt_resize_state *state = data;
|
|
|
|
|
|
|
|
|
|
state->commit_rc = plpar_resize_hpt_commit(0, state->shift);
|
|
|
|
|
if (state->commit_rc != H_SUCCESS)
|
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
|
|
/* Hypervisor has transitioned the HTAB, update our globals */
|
|
|
|
|
ppc64_pft_size = state->shift;
|
|
|
|
|
htab_size_bytes = 1UL << ppc64_pft_size;
|
|
|
|
|
htab_hash_mask = (htab_size_bytes >> 7) - 1;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Must be called in user context */
|
|
|
|
|
static int pseries_lpar_resize_hpt(unsigned long shift)
|
|
|
|
|
{
|
|
|
|
|
struct hpt_resize_state state = {
|
|
|
|
|
.shift = shift,
|
|
|
|
|
.commit_rc = H_FUNCTION,
|
|
|
|
|
};
|
|
|
|
|
unsigned int delay, total_delay = 0;
|
|
|
|
|
int rc;
|
|
|
|
|
ktime_t t0, t1, t2;
|
|
|
|
|
|
|
|
|
|
might_sleep();
|
|
|
|
|
|
|
|
|
|
if (!firmware_has_feature(FW_FEATURE_HPT_RESIZE))
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
|
|
printk(KERN_INFO "lpar: Attempting to resize HPT to shift %lu\n",
|
|
|
|
|
shift);
|
|
|
|
|
|
|
|
|
|
t0 = ktime_get();
|
|
|
|
|
|
|
|
|
|
rc = plpar_resize_hpt_prepare(0, shift);
|
|
|
|
|
while (H_IS_LONG_BUSY(rc)) {
|
|
|
|
|
delay = get_longbusy_msecs(rc);
|
|
|
|
|
total_delay += delay;
|
|
|
|
|
if (total_delay > HPT_RESIZE_TIMEOUT) {
|
|
|
|
|
/* prepare with shift==0 cancels an in-progress resize */
|
|
|
|
|
rc = plpar_resize_hpt_prepare(0, 0);
|
|
|
|
|
if (rc != H_SUCCESS)
|
|
|
|
|
printk(KERN_WARNING
|
|
|
|
|
"lpar: Unexpected error %d cancelling timed out HPT resize\n",
|
|
|
|
|
rc);
|
|
|
|
|
return -ETIMEDOUT;
|
|
|
|
|
}
|
|
|
|
|
msleep(delay);
|
|
|
|
|
rc = plpar_resize_hpt_prepare(0, shift);
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
switch (rc) {
|
|
|
|
|
case H_SUCCESS:
|
|
|
|
|
/* Continue on */
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case H_PARAMETER:
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
case H_RESOURCE:
|
|
|
|
|
return -EPERM;
|
|
|
|
|
default:
|
|
|
|
|
printk(KERN_WARNING
|
|
|
|
|
"lpar: Unexpected error %d from H_RESIZE_HPT_PREPARE\n",
|
|
|
|
|
rc);
|
|
|
|
|
return -EIO;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
t1 = ktime_get();
|
|
|
|
|
|
|
|
|
|
rc = stop_machine(pseries_lpar_resize_hpt_commit, &state, NULL);
|
|
|
|
|
|
|
|
|
|
t2 = ktime_get();
|
|
|
|
|
|
|
|
|
|
if (rc != 0) {
|
|
|
|
|
switch (state.commit_rc) {
|
|
|
|
|
case H_PTEG_FULL:
|
|
|
|
|
printk(KERN_WARNING
|
|
|
|
|
"lpar: Hash collision while resizing HPT\n");
|
|
|
|
|
return -ENOSPC;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
printk(KERN_WARNING
|
|
|
|
|
"lpar: Unexpected error %d from H_RESIZE_HPT_COMMIT\n",
|
|
|
|
|
state.commit_rc);
|
|
|
|
|
return -EIO;
|
|
|
|
|
};
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
printk(KERN_INFO
|
|
|
|
|
"lpar: HPT resize to shift %lu complete (%lld ms / %lld ms)\n",
|
|
|
|
|
shift, (long long) ktime_ms_delta(t1, t0),
|
|
|
|
|
(long long) ktime_ms_delta(t2, t1));
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
2017-01-30 18:21:36 +08:00
|
|
|
/* Actually only used for radix, so far */
|
|
|
|
|
static int pseries_lpar_register_process_table(unsigned long base,
|
|
|
|
|
unsigned long page_size, unsigned long table_size)
|
|
|
|
|
{
|
|
|
|
|
long rc;
|
|
|
|
|
unsigned long flags = PROC_TABLE_NEW;
|
|
|
|
|
|
|
|
|
|
if (radix_enabled())
|
|
|
|
|
flags |= PROC_TABLE_RADIX | PROC_TABLE_GTSE;
|
|
|
|
|
for (;;) {
|
|
|
|
|
rc = plpar_hcall_norets(H_REGISTER_PROC_TBL, flags, base,
|
|
|
|
|
page_size, table_size);
|
|
|
|
|
if (!H_IS_LONG_BUSY(rc))
|
|
|
|
|
break;
|
|
|
|
|
mdelay(get_longbusy_msecs(rc));
|
|
|
|
|
}
|
|
|
|
|
if (rc != H_SUCCESS) {
|
|
|
|
|
pr_err("Failed to register process table (rc=%ld)\n", rc);
|
|
|
|
|
BUG();
|
|
|
|
|
}
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
|
2016-07-26 08:33:03 +08:00
|
|
|
void __init hpte_init_pseries(void)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2016-07-05 13:03:58 +08:00
|
|
|
mmu_hash_ops.hpte_invalidate = pSeries_lpar_hpte_invalidate;
|
|
|
|
|
mmu_hash_ops.hpte_updatepp = pSeries_lpar_hpte_updatepp;
|
|
|
|
|
mmu_hash_ops.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp;
|
|
|
|
|
mmu_hash_ops.hpte_insert = pSeries_lpar_hpte_insert;
|
|
|
|
|
mmu_hash_ops.hpte_remove = pSeries_lpar_hpte_remove;
|
|
|
|
|
mmu_hash_ops.hpte_removebolted = pSeries_lpar_hpte_removebolted;
|
|
|
|
|
mmu_hash_ops.flush_hash_range = pSeries_lpar_flush_hash_range;
|
2016-10-01 18:41:56 +08:00
|
|
|
mmu_hash_ops.hpte_clear_all = pseries_hpte_clear_all;
|
2016-07-05 13:03:58 +08:00
|
|
|
mmu_hash_ops.hugepage_invalidate = pSeries_lpar_hugepage_invalidate;
|
2017-03-17 13:02:35 +08:00
|
|
|
|
|
|
|
|
if (firmware_has_feature(FW_FEATURE_HPT_RESIZE))
|
|
|
|
|
mmu_hash_ops.resize_hpt = pseries_lpar_resize_hpt;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2009-04-15 13:55:32 +08:00
|
|
|
|
2017-01-30 18:21:36 +08:00
|
|
|
void radix_init_pseries(void)
|
|
|
|
|
{
|
|
|
|
|
pr_info("Using radix MMU under hypervisor\n");
|
|
|
|
|
register_process_table = pseries_lpar_register_process_table;
|
|
|
|
|
}
|
|
|
|
|
|
2009-04-15 13:55:32 +08:00
|
|
|
#ifdef CONFIG_PPC_SMLPAR
|
|
|
|
|
#define CMO_FREE_HINT_DEFAULT 1
|
|
|
|
|
static int cmo_free_hint_flag = CMO_FREE_HINT_DEFAULT;
|
|
|
|
|
|
|
|
|
|
static int __init cmo_free_hint(char *str)
|
|
|
|
|
{
|
|
|
|
|
char *parm;
|
|
|
|
|
parm = strstrip(str);
|
|
|
|
|
|
|
|
|
|
if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) {
|
|
|
|
|
printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not active.\n");
|
|
|
|
|
cmo_free_hint_flag = 0;
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
cmo_free_hint_flag = 1;
|
|
|
|
|
printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n");
|
|
|
|
|
|
|
|
|
|
if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0)
|
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
__setup("cmo_free_hint=", cmo_free_hint);
|
|
|
|
|
|
|
|
|
|
static void pSeries_set_page_state(struct page *page, int order,
|
|
|
|
|
unsigned long state)
|
|
|
|
|
{
|
|
|
|
|
int i, j;
|
|
|
|
|
unsigned long cmo_page_sz, addr;
|
|
|
|
|
|
|
|
|
|
cmo_page_sz = cmo_get_page_size();
|
|
|
|
|
addr = __pa((unsigned long)page_address(page));
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < (1 << order); i++, addr += PAGE_SIZE) {
|
|
|
|
|
for (j = 0; j < PAGE_SIZE; j += cmo_page_sz)
|
|
|
|
|
plpar_hcall_norets(H_PAGE_INIT, state, addr + j, 0);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void arch_free_page(struct page *page, int order)
|
|
|
|
|
{
|
2016-04-29 21:26:08 +08:00
|
|
|
if (radix_enabled())
|
|
|
|
|
return;
|
2009-04-15 13:55:32 +08:00
|
|
|
if (!cmo_free_hint_flag || !firmware_has_feature(FW_FEATURE_CMO))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
pSeries_set_page_state(page, order, H_PAGE_SET_UNUSED);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(arch_free_page);
|
|
|
|
|
|
2016-04-29 21:26:08 +08:00
|
|
|
#endif /* CONFIG_PPC_SMLPAR */
|
2017-10-19 12:08:43 +08:00
|
|
|
#endif /* CONFIG_PPC_BOOK3S_64 */
|
2009-10-27 02:50:29 +08:00
|
|
|
|
|
|
|
|
#ifdef CONFIG_TRACEPOINTS
|
2014-08-21 10:41:23 +08:00
|
|
|
#ifdef HAVE_JUMP_LABEL
|
2014-07-03 13:52:03 +08:00
|
|
|
struct static_key hcall_tracepoint_key = STATIC_KEY_INIT;
|
|
|
|
|
|
2016-11-29 02:03:21 +08:00
|
|
|
int hcall_tracepoint_regfunc(void)
|
2014-07-03 13:52:03 +08:00
|
|
|
{
|
|
|
|
|
static_key_slow_inc(&hcall_tracepoint_key);
|
2016-11-29 02:03:21 +08:00
|
|
|
return 0;
|
2014-07-03 13:52:03 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void hcall_tracepoint_unregfunc(void)
|
|
|
|
|
{
|
|
|
|
|
static_key_slow_dec(&hcall_tracepoint_key);
|
|
|
|
|
}
|
|
|
|
|
#else
|
2009-10-27 02:50:29 +08:00
|
|
|
/*
|
|
|
|
|
* We optimise our hcall path by placing hcall_tracepoint_refcount
|
|
|
|
|
* directly in the TOC so we can check if the hcall tracepoints are
|
|
|
|
|
* enabled via a single load.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* NB: reg/unreg are called while guarded with the tracepoints_mutex */
|
|
|
|
|
extern long hcall_tracepoint_refcount;
|
|
|
|
|
|
2016-11-29 02:03:21 +08:00
|
|
|
int hcall_tracepoint_regfunc(void)
|
2009-10-27 02:50:29 +08:00
|
|
|
{
|
|
|
|
|
hcall_tracepoint_refcount++;
|
2016-11-29 02:03:21 +08:00
|
|
|
return 0;
|
2009-10-27 02:50:29 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void hcall_tracepoint_unregfunc(void)
|
|
|
|
|
{
|
|
|
|
|
hcall_tracepoint_refcount--;
|
|
|
|
|
}
|
2014-07-03 13:52:03 +08:00
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Since the tracing code might execute hcalls we need to guard against
|
|
|
|
|
* recursion. One example of this are spinlocks calling H_YIELD on
|
|
|
|
|
* shared processor partitions.
|
|
|
|
|
*/
|
|
|
|
|
static DEFINE_PER_CPU(unsigned int, hcall_trace_depth);
|
|
|
|
|
|
2009-10-27 02:50:29 +08:00
|
|
|
|
2009-10-27 02:51:09 +08:00
|
|
|
void __trace_hcall_entry(unsigned long opcode, unsigned long *args)
|
2009-10-27 02:50:29 +08:00
|
|
|
{
|
2010-10-21 08:52:12 +08:00
|
|
|
unsigned long flags;
|
|
|
|
|
unsigned int *depth;
|
|
|
|
|
|
2012-01-09 22:29:15 +08:00
|
|
|
/*
|
|
|
|
|
* We cannot call tracepoints inside RCU idle regions which
|
|
|
|
|
* means we must not trace H_CEDE.
|
|
|
|
|
*/
|
|
|
|
|
if (opcode == H_CEDE)
|
|
|
|
|
return;
|
|
|
|
|
|
2010-10-21 08:52:12 +08:00
|
|
|
local_irq_save(flags);
|
|
|
|
|
|
powerpc: Replace __get_cpu_var uses
This still has not been merged and now powerpc is the only arch that does
not have this change. Sorry about missing linuxppc-dev before.
V2->V2
- Fix up to work against 3.18-rc1
__get_cpu_var() is used for multiple purposes in the kernel source. One of
them is address calculation via the form &__get_cpu_var(x). This calculates
the address for the instance of the percpu variable of the current processor
based on an offset.
Other use cases are for storing and retrieving data from the current
processors percpu area. __get_cpu_var() can be used as an lvalue when
writing data or on the right side of an assignment.
__get_cpu_var() is defined as :
__get_cpu_var() always only does an address determination. However, store
and retrieve operations could use a segment prefix (or global register on
other platforms) to avoid the address calculation.
this_cpu_write() and this_cpu_read() can directly take an offset into a
percpu area and use optimized assembly code to read and write per cpu
variables.
This patch converts __get_cpu_var into either an explicit address
calculation using this_cpu_ptr() or into a use of this_cpu operations that
use the offset. Thereby address calculations are avoided and less registers
are used when code is generated.
At the end of the patch set all uses of __get_cpu_var have been removed so
the macro is removed too.
The patch set includes passes over all arches as well. Once these operations
are used throughout then specialized macros can be defined in non -x86
arches as well in order to optimize per cpu access by f.e. using a global
register that may be set to the per cpu base.
Transformations done to __get_cpu_var()
1. Determine the address of the percpu instance of the current processor.
DEFINE_PER_CPU(int, y);
int *x = &__get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(&y);
2. Same as #1 but this time an array structure is involved.
DEFINE_PER_CPU(int, y[20]);
int *x = __get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(y);
3. Retrieve the content of the current processors instance of a per cpu
variable.
DEFINE_PER_CPU(int, y);
int x = __get_cpu_var(y)
Converts to
int x = __this_cpu_read(y);
4. Retrieve the content of a percpu struct
DEFINE_PER_CPU(struct mystruct, y);
struct mystruct x = __get_cpu_var(y);
Converts to
memcpy(&x, this_cpu_ptr(&y), sizeof(x));
5. Assignment to a per cpu variable
DEFINE_PER_CPU(int, y)
__get_cpu_var(y) = x;
Converts to
__this_cpu_write(y, x);
6. Increment/Decrement etc of a per cpu variable
DEFINE_PER_CPU(int, y);
__get_cpu_var(y)++
Converts to
__this_cpu_inc(y)
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
Signed-off-by: Christoph Lameter <cl@linux.com>
[mpe: Fix build errors caused by set/or_softirq_pending(), and rework
assignment in __set_breakpoint() to use memcpy().]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-10-22 04:23:25 +08:00
|
|
|
depth = this_cpu_ptr(&hcall_trace_depth);
|
2010-10-21 08:52:12 +08:00
|
|
|
|
|
|
|
|
if (*depth)
|
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
|
|
(*depth)++;
|
2011-12-19 00:03:04 +08:00
|
|
|
preempt_disable();
|
2009-10-27 02:51:09 +08:00
|
|
|
trace_hcall_entry(opcode, args);
|
2010-10-21 08:52:12 +08:00
|
|
|
(*depth)--;
|
|
|
|
|
|
|
|
|
|
out:
|
|
|
|
|
local_irq_restore(flags);
|
2009-10-27 02:50:29 +08:00
|
|
|
}
|
|
|
|
|
|
2009-10-27 02:51:09 +08:00
|
|
|
void __trace_hcall_exit(long opcode, unsigned long retval,
|
|
|
|
|
unsigned long *retbuf)
|
2009-10-27 02:50:29 +08:00
|
|
|
{
|
2010-10-21 08:52:12 +08:00
|
|
|
unsigned long flags;
|
|
|
|
|
unsigned int *depth;
|
|
|
|
|
|
2012-01-09 22:29:15 +08:00
|
|
|
if (opcode == H_CEDE)
|
|
|
|
|
return;
|
|
|
|
|
|
2010-10-21 08:52:12 +08:00
|
|
|
local_irq_save(flags);
|
|
|
|
|
|
powerpc: Replace __get_cpu_var uses
This still has not been merged and now powerpc is the only arch that does
not have this change. Sorry about missing linuxppc-dev before.
V2->V2
- Fix up to work against 3.18-rc1
__get_cpu_var() is used for multiple purposes in the kernel source. One of
them is address calculation via the form &__get_cpu_var(x). This calculates
the address for the instance of the percpu variable of the current processor
based on an offset.
Other use cases are for storing and retrieving data from the current
processors percpu area. __get_cpu_var() can be used as an lvalue when
writing data or on the right side of an assignment.
__get_cpu_var() is defined as :
__get_cpu_var() always only does an address determination. However, store
and retrieve operations could use a segment prefix (or global register on
other platforms) to avoid the address calculation.
this_cpu_write() and this_cpu_read() can directly take an offset into a
percpu area and use optimized assembly code to read and write per cpu
variables.
This patch converts __get_cpu_var into either an explicit address
calculation using this_cpu_ptr() or into a use of this_cpu operations that
use the offset. Thereby address calculations are avoided and less registers
are used when code is generated.
At the end of the patch set all uses of __get_cpu_var have been removed so
the macro is removed too.
The patch set includes passes over all arches as well. Once these operations
are used throughout then specialized macros can be defined in non -x86
arches as well in order to optimize per cpu access by f.e. using a global
register that may be set to the per cpu base.
Transformations done to __get_cpu_var()
1. Determine the address of the percpu instance of the current processor.
DEFINE_PER_CPU(int, y);
int *x = &__get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(&y);
2. Same as #1 but this time an array structure is involved.
DEFINE_PER_CPU(int, y[20]);
int *x = __get_cpu_var(y);
Converts to
int *x = this_cpu_ptr(y);
3. Retrieve the content of the current processors instance of a per cpu
variable.
DEFINE_PER_CPU(int, y);
int x = __get_cpu_var(y)
Converts to
int x = __this_cpu_read(y);
4. Retrieve the content of a percpu struct
DEFINE_PER_CPU(struct mystruct, y);
struct mystruct x = __get_cpu_var(y);
Converts to
memcpy(&x, this_cpu_ptr(&y), sizeof(x));
5. Assignment to a per cpu variable
DEFINE_PER_CPU(int, y)
__get_cpu_var(y) = x;
Converts to
__this_cpu_write(y, x);
6. Increment/Decrement etc of a per cpu variable
DEFINE_PER_CPU(int, y);
__get_cpu_var(y)++
Converts to
__this_cpu_inc(y)
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
Signed-off-by: Christoph Lameter <cl@linux.com>
[mpe: Fix build errors caused by set/or_softirq_pending(), and rework
assignment in __set_breakpoint() to use memcpy().]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-10-22 04:23:25 +08:00
|
|
|
depth = this_cpu_ptr(&hcall_trace_depth);
|
2010-10-21 08:52:12 +08:00
|
|
|
|
|
|
|
|
if (*depth)
|
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
|
|
(*depth)++;
|
2009-10-27 02:51:09 +08:00
|
|
|
trace_hcall_exit(opcode, retval, retbuf);
|
2011-12-19 00:03:04 +08:00
|
|
|
preempt_enable();
|
2010-10-21 08:52:12 +08:00
|
|
|
(*depth)--;
|
|
|
|
|
|
|
|
|
|
out:
|
|
|
|
|
local_irq_restore(flags);
|
2009-10-27 02:50:29 +08:00
|
|
|
}
|
|
|
|
|
#endif
|
2011-05-04 14:01:20 +08:00
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* h_get_mpp
|
|
|
|
|
* H_GET_MPP hcall returns info in 7 parms
|
|
|
|
|
*/
|
|
|
|
|
int h_get_mpp(struct hvcall_mpp_data *mpp_data)
|
|
|
|
|
{
|
|
|
|
|
int rc;
|
|
|
|
|
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
|
|
|
|
|
|
|
|
|
|
rc = plpar_hcall9(H_GET_MPP, retbuf);
|
|
|
|
|
|
|
|
|
|
mpp_data->entitled_mem = retbuf[0];
|
|
|
|
|
mpp_data->mapped_mem = retbuf[1];
|
|
|
|
|
|
|
|
|
|
mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
|
|
|
|
|
mpp_data->pool_num = retbuf[2] & 0xffff;
|
|
|
|
|
|
|
|
|
|
mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff;
|
|
|
|
|
mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff;
|
2013-08-07 00:01:24 +08:00
|
|
|
mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffffUL;
|
2011-05-04 14:01:20 +08:00
|
|
|
|
|
|
|
|
mpp_data->pool_size = retbuf[4];
|
|
|
|
|
mpp_data->loan_request = retbuf[5];
|
|
|
|
|
mpp_data->backing_mem = retbuf[6];
|
|
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(h_get_mpp);
|
|
|
|
|
|
|
|
|
|
int h_get_mpp_x(struct hvcall_mpp_x_data *mpp_x_data)
|
|
|
|
|
{
|
|
|
|
|
int rc;
|
|
|
|
|
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE] = { 0 };
|
|
|
|
|
|
|
|
|
|
rc = plpar_hcall9(H_GET_MPP_X, retbuf);
|
|
|
|
|
|
|
|
|
|
mpp_x_data->coalesced_bytes = retbuf[0];
|
|
|
|
|
mpp_x_data->pool_coalesced_bytes = retbuf[1];
|
|
|
|
|
mpp_x_data->pool_purr_cycles = retbuf[2];
|
|
|
|
|
mpp_x_data->pool_spurr_cycles = retbuf[3];
|
|
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
2017-03-22 11:37:00 +08:00
|
|
|
|
|
|
|
|
static unsigned long vsid_unscramble(unsigned long vsid, int ssize)
|
|
|
|
|
{
|
|
|
|
|
unsigned long protovsid;
|
|
|
|
|
unsigned long va_bits = VA_BITS;
|
|
|
|
|
unsigned long modinv, vsid_modulus;
|
|
|
|
|
unsigned long max_mod_inv, tmp_modinv;
|
|
|
|
|
|
|
|
|
|
if (!mmu_has_feature(MMU_FTR_68_BIT_VA))
|
|
|
|
|
va_bits = 65;
|
|
|
|
|
|
|
|
|
|
if (ssize == MMU_SEGSIZE_256M) {
|
|
|
|
|
modinv = VSID_MULINV_256M;
|
|
|
|
|
vsid_modulus = ((1UL << (va_bits - SID_SHIFT)) - 1);
|
|
|
|
|
} else {
|
|
|
|
|
modinv = VSID_MULINV_1T;
|
|
|
|
|
vsid_modulus = ((1UL << (va_bits - SID_SHIFT_1T)) - 1);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* vsid outside our range.
|
|
|
|
|
*/
|
|
|
|
|
if (vsid >= vsid_modulus)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If modinv is the modular multiplicate inverse of (x % vsid_modulus)
|
|
|
|
|
* and vsid = (protovsid * x) % vsid_modulus, then we say:
|
|
|
|
|
* protovsid = (vsid * modinv) % vsid_modulus
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* Check if (vsid * modinv) overflow (63 bits) */
|
|
|
|
|
max_mod_inv = 0x7fffffffffffffffull / vsid;
|
|
|
|
|
if (modinv < max_mod_inv)
|
|
|
|
|
return (vsid * modinv) % vsid_modulus;
|
|
|
|
|
|
|
|
|
|
tmp_modinv = modinv/max_mod_inv;
|
|
|
|
|
modinv %= max_mod_inv;
|
|
|
|
|
|
|
|
|
|
protovsid = (((vsid * max_mod_inv) % vsid_modulus) * tmp_modinv) % vsid_modulus;
|
|
|
|
|
protovsid = (protovsid + vsid * modinv) % vsid_modulus;
|
|
|
|
|
|
|
|
|
|
return protovsid;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int __init reserve_vrma_context_id(void)
|
|
|
|
|
{
|
|
|
|
|
unsigned long protovsid;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Reserve context ids which map to reserved virtual addresses. For now
|
|
|
|
|
* we only reserve the context id which maps to the VRMA VSID. We ignore
|
|
|
|
|
* the addresses in "ibm,adjunct-virtual-addresses" because we don't
|
|
|
|
|
* enable adjunct support via the "ibm,client-architecture-support"
|
|
|
|
|
* interface.
|
|
|
|
|
*/
|
|
|
|
|
protovsid = vsid_unscramble(VRMA_VSID, MMU_SEGSIZE_1T);
|
|
|
|
|
hash__reserve_context_id(protovsid >> ESID_BITS_1T);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
machine_device_initcall(pseries, reserve_vrma_context_id);
|