/* * cec-edid - HDMI Consumer Electronics Control & EDID helpers * * Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved. * * This program is free software; you may redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef _MEDIA_CEC_EDID_H #define _MEDIA_CEC_EDID_H #include #define CEC_PHYS_ADDR_INVALID 0xffff #define cec_phys_addr_exp(pa) \ ((pa) >> 12), ((pa) >> 8) & 0xf, ((pa) >> 4) & 0xf, (pa) & 0xf /** * cec_get_edid_phys_addr() - find and return the physical address * * @edid: pointer to the EDID data * @size: size in bytes of the EDID data * @offset: If not %NULL then the location of the physical address * bytes in the EDID will be returned here. This is set to 0 * if there is no physical address found. * * Return: the physical address or CEC_PHYS_ADDR_INVALID if there is none. */ u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size, unsigned int *offset); /** * cec_set_edid_phys_addr() - find and set the physical address * * @edid: pointer to the EDID data * @size: size in bytes of the EDID data * @phys_addr: the new physical address * * This function finds the location of the physical address in the EDID * and fills in the given physical address and updates the checksum * at the end of the EDID block. It does nothing if the EDID doesn't * contain a physical address. */ void cec_set_edid_phys_addr(u8 *edid, unsigned int size, u16 phys_addr); /** * cec_phys_addr_for_input() - calculate the PA for an input * * @phys_addr: the physical address of the parent * @input: the number of the input port, must be between 1 and 15 * * This function calculates a new physical address based on the input * port number. For example: * * PA = 0.0.0.0 and input = 2 becomes 2.0.0.0 * * PA = 3.0.0.0 and input = 1 becomes 3.1.0.0 * * PA = 3.2.1.0 and input = 5 becomes 3.2.1.5 * * PA = 3.2.1.3 and input = 5 becomes f.f.f.f since it maxed out the depth. * * Return: the new physical address or CEC_PHYS_ADDR_INVALID. */ u16 cec_phys_addr_for_input(u16 phys_addr, u8 input); /** * cec_phys_addr_validate() - validate a physical address from an EDID * * @phys_addr: the physical address to validate * @parent: if not %NULL, then this is filled with the parents PA. * @port: if not %NULL, then this is filled with the input port. * * This validates a physical address as read from an EDID. If the * PA is invalid (such as 1.0.1.0 since '0' is only allowed at the end), * then it will return -EINVAL. * * The parent PA is passed into %parent and the input port is passed into * %port. For example: * * PA = 0.0.0.0: has parent 0.0.0.0 and input port 0. * * PA = 1.0.0.0: has parent 0.0.0.0 and input port 1. * * PA = 3.2.0.0: has parent 3.0.0.0 and input port 2. * * PA = f.f.f.f: has parent f.f.f.f and input port 0. * * Return: 0 if the PA is valid, -EINVAL if not. */ int cec_phys_addr_validate(u16 phys_addr, u16 *parent, u16 *port); #endif /* _MEDIA_CEC_EDID_H */ option>space:mode:

author	Thomas Gleixner <tglx@linutronix.de>	2017-01-31 23:58:38 +0100
committer	Ingo Molnar <mingo@kernel.org>	2017-02-01 08:37:27 +0100
commit	dd86e373e09fb16b83e8adf5c48c421a4ca76468 (patch)
tree	55703c2ea8584e303e342090614e0aab3509ab21 /tools/perf/arch/x86
parent	0b3589be9b98994ce3d5aeca52445d1f5627c4ba (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 'tools/perf/arch/x86')