/****************************************************************************** * callback.h * * Register guest OS callbacks with Xen. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to * deal in the Software without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or * sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * 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. * * Copyright (c) 2006, Ian Campbell */ #ifndef __XEN_PUBLIC_CALLBACK_H__ #define __XEN_PUBLIC_CALLBACK_H__ #include /* * Prototype for this hypercall is: * long callback_op(int cmd, void *extra_args) * @cmd == CALLBACKOP_??? (callback operation). * @extra_args == Operation-specific extra arguments (NULL if none). */ /* x86: Callback for event delivery. */ #define CALLBACKTYPE_event 0 /* x86: Failsafe callback when guest state cannot be restored by Xen. */ #define CALLBACKTYPE_failsafe 1 /* x86/64 hypervisor: Syscall by 64-bit guest app ('64-on-64-on-64'). */ #define CALLBACKTYPE_syscall 2 /* * x86/32 hypervisor: Only available on x86/32 when supervisor_mode_kernel * feature is enabled. Do not use this callback type in new code. */ #define CALLBACKTYPE_sysenter_deprecated 3 /* x86: Callback for NMI delivery. */ #define CALLBACKTYPE_nmi 4 /* * x86: sysenter is only available as follows: * - 32-bit hypervisor: with the supervisor_mode_kernel feature enabled * - 64-bit hypervisor: 32-bit guest applications on Intel CPUs * ('32-on-32-on-64', '32-on-64-on-64') * [nb. also 64-bit guest applications on Intel CPUs * ('64-on-64-on-64'), but syscall is preferred] */ #define CALLBACKTYPE_sysenter 5 /* * x86/64 hypervisor: Syscall by 32-bit guest app on AMD CPUs * ('32-on-32-on-64', '32-on-64-on-64') */ #define CALLBACKTYPE_syscall32 7 /* * Disable event deliver during callback? This flag is ignored for event and * NMI callbacks: event delivery is unconditionally disabled. */ #define _CALLBACKF_mask_events 0 #define CALLBACKF_mask_events (1U << _CALLBACKF_mask_events) /* * Register a callback. */ #define CALLBACKOP_register 0 struct callback_register { uint16_t type; uint16_t flags; xen_callback_t address; }; /* * Unregister a callback. * * Not all callbacks can be unregistered. -EINVAL will be returned if * you attempt to unregister such a callback. */ #define CALLBACKOP_unregister 1 struct callback_unregister { uint16_t type; uint16_t _unused; }; #endif /* __XEN_PUBLIC_CALLBACK_H__ */ ();'>space:mode:
authorThomas Gleixner <tglx@linutronix.de>2017-01-31 09:37:34 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 21:47:58 +0100
commit0becc0ae5b42828785b589f686725ff5bc3b9b25 (patch)
treebe6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101 /drivers/usb/class/usbtmc.c
parent24c2503255d35c269b67162c397a1a1c1e02f6ce (diff)
x86/mce: Make timer handling more robust
Erik reported that on a preproduction hardware a CMCI storm triggers the BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is started by the CMCI logic before the MCE CPU hotplug callback starts the timer with add_timer_on(). So the timer is already queued which triggers the BUG. Using add_timer_on() is pretty pointless in this code because the timer is strictlty per CPU, initialized as pinned and all operations which arm the timer happen on the CPU to which the timer belongs. Simplify the whole machinery by using mod_timer() instead of add_timer_on() which avoids the problem because mod_timer() can handle already queued timers. Use __start_timer() everywhere so the earliest armed expiry time is preserved. Reported-by: Erik Veijola <erik.veijola@intel.com> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/usb/class/usbtmc.c')