/* * fixmap.h: compile-time virtual memory allocation * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1998 Ingo Molnar * * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999 * x86_32 and x86_64 integration by Gustavo F. Padovan, February 2009 * Break out common bits to asm-generic by Mark Salter, November 2013 */ #ifndef __ASM_GENERIC_FIXMAP_H #define __ASM_GENERIC_FIXMAP_H #include #define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) #define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT) #ifndef __ASSEMBLY__ /* * 'index to address' translation. If anyone tries to use the idx * directly without translation, we catch the bug with a NULL-deference * kernel oops. Illegal ranges of incoming indices are caught too. */ static __always_inline unsigned long fix_to_virt(const unsigned int idx) { BUILD_BUG_ON(idx >= __end_of_fixed_addresses); return __fix_to_virt(idx); } static inline unsigned long virt_to_fix(const unsigned long vaddr) { BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); return __virt_to_fix(vaddr); } /* * Provide some reasonable defaults for page flags. * Not all architectures use all of these different types and some * architectures use different names. */ #ifndef FIXMAP_PAGE_NORMAL #define FIXMAP_PAGE_NORMAL PAGE_KERNEL #endif #if !defined(FIXMAP_PAGE_RO) && defined(PAGE_KERNEL_RO) #define FIXMAP_PAGE_RO PAGE_KERNEL_RO #endif #ifndef FIXMAP_PAGE_NOCACHE #define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_NOCACHE #endif #ifndef FIXMAP_PAGE_IO #define FIXMAP_PAGE_IO PAGE_KERNEL_IO #endif #ifndef FIXMAP_PAGE_CLEAR #define FIXMAP_PAGE_CLEAR __pgprot(0) #endif #ifndef set_fixmap #define set_fixmap(idx, phys) \ __set_fixmap(idx, phys, FIXMAP_PAGE_NORMAL) #endif #ifndef clear_fixmap #define clear_fixmap(idx) \ __set_fixmap(idx, 0, FIXMAP_PAGE_CLEAR) #endif /* Return a pointer with offset calculated */ #define __set_fixmap_offset(idx, phys, flags) \ ({ \ unsigned long ________addr; \ __set_fixmap(idx, phys, flags); \ ________addr = fix_to_virt(idx) + ((phys) & (PAGE_SIZE - 1)); \ ________addr; \ }) #define set_fixmap_offset(idx, phys) \ __set_fixmap_offset(idx, phys, FIXMAP_PAGE_NORMAL) /* * Some hardware wants to get fixmapped without caching. */ #define set_fixmap_nocache(idx, phys) \ __set_fixmap(idx, phys, FIXMAP_PAGE_NOCACHE) #define set_fixmap_offset_nocache(idx, phys) \ __set_fixmap_offset(idx, phys, FIXMAP_PAGE_NOCACHE) /* * Some fixmaps are for IO */ #define set_fixmap_io(idx, phys) \ __set_fixmap(idx, phys, FIXMAP_PAGE_IO) #define set_fixmap_offset_io(idx, phys) \ __set_fixmap_offset(idx, phys, FIXMAP_PAGE_IO) #endif /* __ASSEMBLY__ */ #endif /* __ASM_GENERIC_FIXMAP_H */ orm>
path: root/include/trace/events/pagemap.h
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 23:58:38 +0100
committerIngo Molnar <mingo@kernel.org>2017-02-01 08:37:27 +0100
commitdd86e373e09fb16b83e8adf5c48c421a4ca76468 (patch)
tree55703c2ea8584e303e342090614e0aab3509ab21 /include/trace/events/pagemap.h
parent0b3589be9b98994ce3d5aeca52445d1f5627c4ba (diff)
perf/x86/intel/rapl: Make package handling more robust
The package management code in RAPL relies on package mapping being available before a CPU is started. This changed with: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") because the ACPI/BIOS information turned out to be unreliable, but that left RAPL in broken state. This was not noticed because on a regular boot all CPUs are online before RAPL is initialized. A possible fix would be to reintroduce the mess which allocates a package data structure in CPU prepare and when it turns out to already exist in starting throw it away later in the CPU online callback. But that's a horrible hack and not required at all because RAPL becomes functional for perf only in the CPU online callback. That's correct because user space is not yet informed about the CPU being onlined, so nothing caan rely on RAPL being available on that particular CPU. Move the allocation to the CPU online callback and simplify the hotplug handling. At this point the package mapping is established and correct. This also adds a missing check for available package data in the event_init() function. Reported-by: Yasuaki Ishimatsu <yasu.isimatu@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Fixes: 9d85eb9119f4 ("x86/smpboot: Make logical package management more robust") Link: http://lkml.kernel.org/r/20170131230141.212593966@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/trace/events/pagemap.h')