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186f43608a
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. Build testing revealed some implicit header usage that was fixed up accordingly. Note that some bool/obj-y instances remain since module.h is the header for some exception table entry stuff, and for things like __init_or_module (code that is tossed when MODULES=n). Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160714001901.31603-4-paul.gortmaker@windriver.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/*
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* Common hypervisor code
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*
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* Copyright (C) 2008, VMware, Inc.
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* Author : Alok N Kataria <akataria@vmware.com>
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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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <linux/init.h>
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#include <linux/export.h>
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#include <asm/processor.h>
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#include <asm/hypervisor.h>
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static const __initconst struct hypervisor_x86 * const hypervisors[] =
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{
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#ifdef CONFIG_XEN
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&x86_hyper_xen,
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#endif
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&x86_hyper_vmware,
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&x86_hyper_ms_hyperv,
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#ifdef CONFIG_KVM_GUEST
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&x86_hyper_kvm,
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#endif
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};
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const struct hypervisor_x86 *x86_hyper;
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EXPORT_SYMBOL(x86_hyper);
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static inline void __init
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detect_hypervisor_vendor(void)
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{
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const struct hypervisor_x86 *h, * const *p;
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uint32_t pri, max_pri = 0;
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for (p = hypervisors; p < hypervisors + ARRAY_SIZE(hypervisors); p++) {
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h = *p;
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pri = h->detect();
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if (pri != 0 && pri > max_pri) {
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max_pri = pri;
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x86_hyper = h;
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}
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}
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if (max_pri)
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pr_info("Hypervisor detected: %s\n", x86_hyper->name);
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}
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void init_hypervisor(struct cpuinfo_x86 *c)
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{
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if (x86_hyper && x86_hyper->set_cpu_features)
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x86_hyper->set_cpu_features(c);
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}
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void __init init_hypervisor_platform(void)
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{
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detect_hypervisor_vendor();
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if (!x86_hyper)
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return;
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init_hypervisor(&boot_cpu_data);
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if (x86_hyper->init_platform)
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x86_hyper->init_platform();
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}
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bool __init hypervisor_x2apic_available(void)
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{
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return x86_hyper &&
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x86_hyper->x2apic_available &&
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x86_hyper->x2apic_available();
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}
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