License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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// SPDX-License-Identifier: GPL-2.0
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2017-03-15 01:35:46 +08:00
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/*
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* Xen SMP support
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*
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* This file implements the Xen versions of smp_ops. SMP under Xen is
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* very straightforward. Bringing a CPU up is simply a matter of
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* loading its initial context and setting it running.
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*
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* IPIs are handled through the Xen event mechanism.
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*
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* Because virtual CPUs can be scheduled onto any real CPU, there's no
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* useful topology information for the kernel to make use of. As a
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* result, all CPUs are treated as if they're single-core and
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* single-threaded.
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*/
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#include <linux/sched.h>
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2017-11-02 15:59:12 +08:00
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#include <linux/sched/task_stack.h>
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2017-03-15 01:35:46 +08:00
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/smp.h>
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#include <linux/irq_work.h>
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#include <linux/tick.h>
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#include <linux/nmi.h>
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2017-07-05 22:05:20 +08:00
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#include <linux/cpuhotplug.h>
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2018-10-20 15:26:49 +08:00
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#include <linux/stackprotector.h>
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2020-06-09 12:32:42 +08:00
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#include <linux/pgtable.h>
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2017-03-15 01:35:46 +08:00
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#include <asm/paravirt.h>
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2020-05-22 04:05:26 +08:00
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#include <asm/idtentry.h>
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2017-03-15 01:35:46 +08:00
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#include <asm/desc.h>
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#include <asm/cpu.h>
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2020-08-06 20:34:32 +08:00
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#include <asm/io_apic.h>
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2017-03-15 01:35:46 +08:00
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#include <xen/interface/xen.h>
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#include <xen/interface/vcpu.h>
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#include <xen/interface/xenpmu.h>
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2018-06-21 16:43:31 +08:00
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#include <asm/spec-ctrl.h>
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2017-03-15 01:35:46 +08:00
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#include <asm/xen/interface.h>
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#include <asm/xen/hypercall.h>
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#include <xen/xen.h>
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#include <xen/page.h>
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#include <xen/events.h>
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#include <xen/hvc-console.h>
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#include "xen-ops.h"
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#include "mmu.h"
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#include "smp.h"
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#include "pmu.h"
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cpumask_var_t xen_cpu_initialized_map;
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static DEFINE_PER_CPU(struct xen_common_irq, xen_irq_work) = { .irq = -1 };
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static DEFINE_PER_CPU(struct xen_common_irq, xen_pmu_irq) = { .irq = -1 };
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static irqreturn_t xen_irq_work_interrupt(int irq, void *dev_id);
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2020-03-26 17:26:03 +08:00
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void asm_cpu_bringup_and_idle(void);
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2017-03-15 01:35:46 +08:00
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static void cpu_bringup(void)
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{
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int cpu;
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2019-07-11 03:42:46 +08:00
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cr4_init();
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2017-03-15 01:35:46 +08:00
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cpu_init();
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touch_softlockup_watchdog();
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/* PVH runs in ring 0 and allows us to do native syscalls. Yay! */
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if (!xen_feature(XENFEAT_supervisor_mode_kernel)) {
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xen_enable_sysenter();
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xen_enable_syscall();
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}
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cpu = smp_processor_id();
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smp_store_cpu_info(cpu);
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cpu_data(cpu).x86_max_cores = 1;
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set_cpu_sibling_map(cpu);
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2018-06-21 16:43:31 +08:00
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speculative_store_bypass_ht_init();
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2017-03-15 01:35:46 +08:00
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xen_setup_cpu_clockevents();
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notify_cpu_starting(cpu);
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set_cpu_online(cpu, true);
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cpu_set_state_online(cpu); /* Implies full memory barrier. */
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/* We can take interrupts now: we're officially "up". */
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local_irq_enable();
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}
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asmlinkage __visible void cpu_bringup_and_idle(void)
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{
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cpu_bringup();
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cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
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}
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void xen_smp_intr_free_pv(unsigned int cpu)
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{
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if (per_cpu(xen_irq_work, cpu).irq >= 0) {
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unbind_from_irqhandler(per_cpu(xen_irq_work, cpu).irq, NULL);
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per_cpu(xen_irq_work, cpu).irq = -1;
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kfree(per_cpu(xen_irq_work, cpu).name);
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per_cpu(xen_irq_work, cpu).name = NULL;
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}
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if (per_cpu(xen_pmu_irq, cpu).irq >= 0) {
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unbind_from_irqhandler(per_cpu(xen_pmu_irq, cpu).irq, NULL);
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per_cpu(xen_pmu_irq, cpu).irq = -1;
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kfree(per_cpu(xen_pmu_irq, cpu).name);
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per_cpu(xen_pmu_irq, cpu).name = NULL;
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}
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}
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int xen_smp_intr_init_pv(unsigned int cpu)
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{
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int rc;
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char *callfunc_name, *pmu_name;
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callfunc_name = kasprintf(GFP_KERNEL, "irqwork%d", cpu);
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rc = bind_ipi_to_irqhandler(XEN_IRQ_WORK_VECTOR,
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cpu,
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xen_irq_work_interrupt,
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IRQF_PERCPU|IRQF_NOBALANCING,
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callfunc_name,
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NULL);
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if (rc < 0)
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goto fail;
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per_cpu(xen_irq_work, cpu).irq = rc;
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per_cpu(xen_irq_work, cpu).name = callfunc_name;
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2022-03-25 22:20:02 +08:00
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if (is_xen_pmu) {
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2017-03-15 01:35:46 +08:00
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pmu_name = kasprintf(GFP_KERNEL, "pmu%d", cpu);
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rc = bind_virq_to_irqhandler(VIRQ_XENPMU, cpu,
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xen_pmu_irq_handler,
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IRQF_PERCPU|IRQF_NOBALANCING,
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pmu_name, NULL);
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if (rc < 0)
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goto fail;
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per_cpu(xen_pmu_irq, cpu).irq = rc;
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per_cpu(xen_pmu_irq, cpu).name = pmu_name;
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}
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return 0;
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fail:
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xen_smp_intr_free_pv(cpu);
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return rc;
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}
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2022-02-01 18:57:16 +08:00
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static void __init _get_smp_config(unsigned int early)
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2017-03-15 01:35:46 +08:00
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{
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int i, rc;
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unsigned int subtract = 0;
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2022-02-01 18:57:16 +08:00
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if (early)
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2017-03-15 01:35:46 +08:00
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return;
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num_processors = 0;
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disabled_cpus = 0;
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for (i = 0; i < nr_cpu_ids; i++) {
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rc = HYPERVISOR_vcpu_op(VCPUOP_is_up, i, NULL);
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if (rc >= 0) {
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num_processors++;
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set_cpu_possible(i, true);
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} else {
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set_cpu_possible(i, false);
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set_cpu_present(i, false);
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subtract++;
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}
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}
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#ifdef CONFIG_HOTPLUG_CPU
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/* This is akin to using 'nr_cpus' on the Linux command line.
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* Which is OK as when we use 'dom0_max_vcpus=X' we can only
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* have up to X, while nr_cpu_ids is greater than X. This
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* normally is not a problem, except when CPU hotplugging
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* is involved and then there might be more than X CPUs
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* in the guest - which will not work as there is no
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* hypercall to expand the max number of VCPUs an already
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* running guest has. So cap it up to X. */
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if (subtract)
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nr_cpu_ids = nr_cpu_ids - subtract;
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#endif
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}
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static void __init xen_pv_smp_prepare_boot_cpu(void)
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{
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BUG_ON(smp_processor_id() != 0);
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native_smp_prepare_boot_cpu();
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if (!xen_feature(XENFEAT_writable_page_tables))
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/* We've switched to the "real" per-cpu gdt, so make
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* sure the old memory can be recycled. */
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make_lowmem_page_readwrite(xen_initial_gdt);
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xen_setup_vcpu_info_placement();
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/*
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* The alternative logic (which patches the unlock/lock) runs before
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* the smp bootup up code is activated. Hence we need to set this up
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* the core kernel is being patched. Otherwise we will have only
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* modules patched but not core code.
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*/
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xen_init_spinlocks();
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}
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2017-03-15 01:35:56 +08:00
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static void __init xen_pv_smp_prepare_cpus(unsigned int max_cpus)
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2017-03-15 01:35:46 +08:00
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{
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unsigned cpu;
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if (skip_ioapic_setup) {
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char *m = (max_cpus == 0) ?
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"The nosmp parameter is incompatible with Xen; " \
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"use Xen dom0_max_vcpus=1 parameter" :
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"The noapic parameter is incompatible with Xen";
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xen_raw_printk(m);
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panic(m);
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}
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xen_init_lock_cpu(0);
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2021-11-03 07:36:36 +08:00
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smp_prepare_cpus_common();
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2017-03-15 01:35:46 +08:00
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2021-11-03 07:36:36 +08:00
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cpu_data(0).x86_max_cores = 1;
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2017-03-15 01:35:46 +08:00
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2018-06-21 16:43:31 +08:00
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speculative_store_bypass_ht_init();
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2017-03-15 01:35:46 +08:00
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xen_pmu_init(0);
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2017-04-26 21:42:48 +08:00
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if (xen_smp_intr_init(0) || xen_smp_intr_init_pv(0))
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2017-03-15 01:35:46 +08:00
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BUG();
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if (!alloc_cpumask_var(&xen_cpu_initialized_map, GFP_KERNEL))
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panic("could not allocate xen_cpu_initialized_map\n");
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cpumask_copy(xen_cpu_initialized_map, cpumask_of(0));
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/* Restrict the possible_map according to max_cpus. */
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while ((num_possible_cpus() > 1) && (num_possible_cpus() > max_cpus)) {
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for (cpu = nr_cpu_ids - 1; !cpu_possible(cpu); cpu--)
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continue;
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set_cpu_possible(cpu, false);
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}
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for_each_possible_cpu(cpu)
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set_cpu_present(cpu, true);
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}
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static int
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cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
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{
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struct vcpu_guest_context *ctxt;
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struct desc_struct *gdt;
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unsigned long gdt_mfn;
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/* used to tell cpu_init() that it can proceed with initialization */
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cpumask_set_cpu(cpu, cpu_callout_mask);
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|
|
if (cpumask_test_and_set_cpu(cpu, xen_cpu_initialized_map))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
ctxt = kzalloc(sizeof(*ctxt), GFP_KERNEL);
|
2022-02-09 16:02:13 +08:00
|
|
|
if (ctxt == NULL) {
|
|
|
|
cpumask_clear_cpu(cpu, xen_cpu_initialized_map);
|
|
|
|
cpumask_clear_cpu(cpu, cpu_callout_mask);
|
2017-03-15 01:35:46 +08:00
|
|
|
return -ENOMEM;
|
2022-02-09 16:02:13 +08:00
|
|
|
}
|
2017-03-15 01:35:46 +08:00
|
|
|
|
|
|
|
gdt = get_cpu_gdt_rw(cpu);
|
|
|
|
|
2017-11-02 15:59:12 +08:00
|
|
|
/*
|
|
|
|
* Bring up the CPU in cpu_bringup_and_idle() with the stack
|
|
|
|
* pointing just below where pt_regs would be if it were a normal
|
|
|
|
* kernel entry.
|
|
|
|
*/
|
2020-03-26 17:26:03 +08:00
|
|
|
ctxt->user_regs.eip = (unsigned long)asm_cpu_bringup_and_idle;
|
2017-03-15 01:35:46 +08:00
|
|
|
ctxt->flags = VGCF_IN_KERNEL;
|
|
|
|
ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */
|
|
|
|
ctxt->user_regs.ds = __USER_DS;
|
|
|
|
ctxt->user_regs.es = __USER_DS;
|
|
|
|
ctxt->user_regs.ss = __KERNEL_DS;
|
2017-11-02 15:59:12 +08:00
|
|
|
ctxt->user_regs.cs = __KERNEL_CS;
|
|
|
|
ctxt->user_regs.esp = (unsigned long)task_pt_regs(idle);
|
2017-03-15 01:35:46 +08:00
|
|
|
|
|
|
|
xen_copy_trap_info(ctxt->trap_ctxt);
|
|
|
|
|
|
|
|
BUG_ON((unsigned long)gdt & ~PAGE_MASK);
|
|
|
|
|
|
|
|
gdt_mfn = arbitrary_virt_to_mfn(gdt);
|
|
|
|
make_lowmem_page_readonly(gdt);
|
|
|
|
make_lowmem_page_readonly(mfn_to_virt(gdt_mfn));
|
|
|
|
|
|
|
|
ctxt->gdt_frames[0] = gdt_mfn;
|
|
|
|
ctxt->gdt_ents = GDT_ENTRIES;
|
|
|
|
|
2017-11-02 15:59:12 +08:00
|
|
|
/*
|
|
|
|
* Set SS:SP that Xen will use when entering guest kernel mode
|
|
|
|
* from guest user mode. Subsequent calls to load_sp0() can
|
|
|
|
* change this value.
|
|
|
|
*/
|
2017-03-15 01:35:46 +08:00
|
|
|
ctxt->kernel_ss = __KERNEL_DS;
|
2017-11-02 15:59:12 +08:00
|
|
|
ctxt->kernel_sp = task_top_of_stack(idle);
|
2017-03-15 01:35:46 +08:00
|
|
|
|
|
|
|
ctxt->gs_base_kernel = per_cpu_offset(cpu);
|
|
|
|
ctxt->event_callback_eip =
|
2020-05-22 04:05:26 +08:00
|
|
|
(unsigned long)xen_asm_exc_xen_hypervisor_callback;
|
2017-03-15 01:35:46 +08:00
|
|
|
ctxt->failsafe_callback_eip =
|
|
|
|
(unsigned long)xen_failsafe_callback;
|
|
|
|
per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir);
|
|
|
|
|
|
|
|
ctxt->ctrlreg[3] = xen_pfn_to_cr3(virt_to_gfn(swapper_pg_dir));
|
|
|
|
if (HYPERVISOR_vcpu_op(VCPUOP_initialise, xen_vcpu_nr(cpu), ctxt))
|
|
|
|
BUG();
|
|
|
|
|
|
|
|
kfree(ctxt);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-03-15 01:35:56 +08:00
|
|
|
static int xen_pv_cpu_up(unsigned int cpu, struct task_struct *idle)
|
2017-03-15 01:35:46 +08:00
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
2019-04-15 00:00:04 +08:00
|
|
|
rc = common_cpu_up(cpu, idle);
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
2017-03-15 01:35:46 +08:00
|
|
|
|
|
|
|
xen_setup_runstate_info(cpu);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* PV VCPUs are always successfully taken down (see 'while' loop
|
|
|
|
* in xen_cpu_die()), so -EBUSY is an error.
|
|
|
|
*/
|
|
|
|
rc = cpu_check_up_prepare(cpu);
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
/* make sure interrupts start blocked */
|
|
|
|
per_cpu(xen_vcpu, cpu)->evtchn_upcall_mask = 1;
|
|
|
|
|
|
|
|
rc = cpu_initialize_context(cpu, idle);
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
xen_pmu_init(cpu);
|
|
|
|
|
|
|
|
rc = HYPERVISOR_vcpu_op(VCPUOP_up, xen_vcpu_nr(cpu), NULL);
|
|
|
|
BUG_ON(rc);
|
|
|
|
|
|
|
|
while (cpu_report_state(cpu) != CPU_ONLINE)
|
|
|
|
HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
2017-03-15 01:35:56 +08:00
|
|
|
static int xen_pv_cpu_disable(void)
|
2017-03-15 01:35:46 +08:00
|
|
|
{
|
|
|
|
unsigned int cpu = smp_processor_id();
|
|
|
|
if (cpu == 0)
|
|
|
|
return -EBUSY;
|
|
|
|
|
|
|
|
cpu_disable_common();
|
|
|
|
|
|
|
|
load_cr3(swapper_pg_dir);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void xen_pv_cpu_die(unsigned int cpu)
|
|
|
|
{
|
|
|
|
while (HYPERVISOR_vcpu_op(VCPUOP_is_up,
|
|
|
|
xen_vcpu_nr(cpu), NULL)) {
|
|
|
|
__set_current_state(TASK_UNINTERRUPTIBLE);
|
|
|
|
schedule_timeout(HZ/10);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (common_cpu_die(cpu) == 0) {
|
|
|
|
xen_smp_intr_free(cpu);
|
|
|
|
xen_uninit_lock_cpu(cpu);
|
|
|
|
xen_teardown_timer(cpu);
|
|
|
|
xen_pmu_finish(cpu);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-03-15 01:35:56 +08:00
|
|
|
static void xen_pv_play_dead(void) /* used only with HOTPLUG_CPU */
|
2017-03-15 01:35:46 +08:00
|
|
|
{
|
|
|
|
play_dead_common();
|
|
|
|
HYPERVISOR_vcpu_op(VCPUOP_down, xen_vcpu_nr(smp_processor_id()), NULL);
|
|
|
|
cpu_bringup();
|
|
|
|
/*
|
|
|
|
* commit 4b0c0f294 (tick: Cleanup NOHZ per cpu data on cpu down)
|
|
|
|
* clears certain data that the cpu_idle loop (which called us
|
|
|
|
* and that we return from) expects. The only way to get that
|
|
|
|
* data back is to call:
|
|
|
|
*/
|
|
|
|
tick_nohz_idle_enter();
|
2018-04-06 00:58:27 +08:00
|
|
|
tick_nohz_idle_stop_tick_protected();
|
2017-03-15 01:35:46 +08:00
|
|
|
|
2017-07-05 22:05:20 +08:00
|
|
|
cpuhp_online_idle(CPUHP_AP_ONLINE_IDLE);
|
2017-03-15 01:35:46 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
#else /* !CONFIG_HOTPLUG_CPU */
|
2017-03-15 01:35:56 +08:00
|
|
|
static int xen_pv_cpu_disable(void)
|
2017-03-15 01:35:46 +08:00
|
|
|
{
|
|
|
|
return -ENOSYS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void xen_pv_cpu_die(unsigned int cpu)
|
|
|
|
{
|
|
|
|
BUG();
|
|
|
|
}
|
|
|
|
|
2017-03-15 01:35:56 +08:00
|
|
|
static void xen_pv_play_dead(void)
|
2017-03-15 01:35:46 +08:00
|
|
|
{
|
|
|
|
BUG();
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|
|
|
|
static void stop_self(void *v)
|
|
|
|
{
|
|
|
|
int cpu = smp_processor_id();
|
|
|
|
|
|
|
|
/* make sure we're not pinning something down */
|
|
|
|
load_cr3(swapper_pg_dir);
|
|
|
|
/* should set up a minimal gdt */
|
|
|
|
|
|
|
|
set_cpu_online(cpu, false);
|
|
|
|
|
|
|
|
HYPERVISOR_vcpu_op(VCPUOP_down, xen_vcpu_nr(cpu), NULL);
|
|
|
|
BUG();
|
|
|
|
}
|
|
|
|
|
2017-03-15 01:35:56 +08:00
|
|
|
static void xen_pv_stop_other_cpus(int wait)
|
2017-03-15 01:35:46 +08:00
|
|
|
{
|
|
|
|
smp_call_function(stop_self, NULL, wait);
|
|
|
|
}
|
|
|
|
|
|
|
|
static irqreturn_t xen_irq_work_interrupt(int irq, void *dev_id)
|
|
|
|
{
|
|
|
|
irq_work_run();
|
|
|
|
inc_irq_stat(apic_irq_work_irqs);
|
|
|
|
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct smp_ops xen_smp_ops __initconst = {
|
|
|
|
.smp_prepare_boot_cpu = xen_pv_smp_prepare_boot_cpu,
|
2017-03-15 01:35:56 +08:00
|
|
|
.smp_prepare_cpus = xen_pv_smp_prepare_cpus,
|
2017-06-03 08:06:02 +08:00
|
|
|
.smp_cpus_done = xen_smp_cpus_done,
|
2017-03-15 01:35:46 +08:00
|
|
|
|
2017-03-15 01:35:56 +08:00
|
|
|
.cpu_up = xen_pv_cpu_up,
|
2017-03-15 01:35:46 +08:00
|
|
|
.cpu_die = xen_pv_cpu_die,
|
2017-03-15 01:35:56 +08:00
|
|
|
.cpu_disable = xen_pv_cpu_disable,
|
|
|
|
.play_dead = xen_pv_play_dead,
|
2017-03-15 01:35:46 +08:00
|
|
|
|
2017-03-15 01:35:56 +08:00
|
|
|
.stop_other_cpus = xen_pv_stop_other_cpus,
|
2017-03-15 01:35:46 +08:00
|
|
|
.smp_send_reschedule = xen_smp_send_reschedule,
|
|
|
|
|
|
|
|
.send_call_func_ipi = xen_smp_send_call_function_ipi,
|
|
|
|
.send_call_func_single_ipi = xen_smp_send_call_function_single_ipi,
|
|
|
|
};
|
|
|
|
|
|
|
|
void __init xen_smp_init(void)
|
|
|
|
{
|
|
|
|
smp_ops = xen_smp_ops;
|
2022-02-01 18:57:16 +08:00
|
|
|
|
|
|
|
/* Avoid searching for BIOS MP tables */
|
|
|
|
x86_init.mpparse.find_smp_config = x86_init_noop;
|
|
|
|
x86_init.mpparse.get_smp_config = _get_smp_config;
|
2017-03-15 01:35:46 +08:00
|
|
|
}
|