/****************************************************************************** * Guest OS interface to ARM Xen. * * Stefano Stabellini , Citrix, 2012 */ #ifndef _ASM_ARM_XEN_INTERFACE_H #define _ASM_ARM_XEN_INTERFACE_H #include #define uint64_aligned_t uint64_t __attribute__((aligned(8))) #define __DEFINE_GUEST_HANDLE(name, type) \ typedef struct { union { type *p; uint64_aligned_t q; }; } \ __guest_handle_ ## name #define DEFINE_GUEST_HANDLE_STRUCT(name) \ __DEFINE_GUEST_HANDLE(name, struct name) #define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name) #define GUEST_HANDLE(name) __guest_handle_ ## name #define set_xen_guest_handle(hnd, val) \ do { \ if (sizeof(hnd) == 8) \ *(uint64_t *)&(hnd) = 0; \ (hnd).p = val; \ } while (0) #define __HYPERVISOR_platform_op_raw __HYPERVISOR_platform_op #ifndef __ASSEMBLY__ /* Explicitly size integers that represent pfns in the interface with * Xen so that we can have one ABI that works for 32 and 64 bit guests. * Note that this means that the xen_pfn_t type may be capable of * representing pfn's which the guest cannot represent in its own pfn * type. However since pfn space is controlled by the guest this is * fine since it simply wouldn't be able to create any sure pfns in * the first place. */ typedef uint64_t xen_pfn_t; #define PRI_xen_pfn "llx" typedef uint64_t xen_ulong_t; #define PRI_xen_ulong "llx" typedef int64_t xen_long_t; #define PRI_xen_long "llx" /* Guest handles for primitive C types. */ __DEFINE_GUEST_HANDLE(uchar, unsigned char); __DEFINE_GUEST_HANDLE(uint, unsigned int); DEFINE_GUEST_HANDLE(char); DEFINE_GUEST_HANDLE(int); DEFINE_GUEST_HANDLE(void); DEFINE_GUEST_HANDLE(uint64_t); DEFINE_GUEST_HANDLE(uint32_t); DEFINE_GUEST_HANDLE(xen_pfn_t); DEFINE_GUEST_HANDLE(xen_ulong_t); /* Maximum number of virtual CPUs in multi-processor guests. */ #define MAX_VIRT_CPUS 1 struct arch_vcpu_info { }; struct arch_shared_info { }; /* TODO: Move pvclock definitions some place arch independent */ struct pvclock_vcpu_time_info { u32 version; u32 pad0; u64 tsc_timestamp; u64 system_time; u32 tsc_to_system_mul; s8 tsc_shift; u8 flags; u8 pad[2]; } __attribute__((__packed__)); /* 32 bytes */ /* It is OK to have a 12 bytes struct with no padding because it is packed */ struct pvclock_wall_clock { u32 version; u32 sec; u32 nsec; u32 sec_hi; } __attribute__((__packed__)); #endif #endif /* _ASM_ARM_XEN_INTERFACE_H */ qt'>
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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 /net/6lowpan/nhc.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 'net/6lowpan/nhc.h')