#ifndef __PERF_KVM_STAT_H #define __PERF_KVM_STAT_H #include "../perf.h" #include "evsel.h" #include "evlist.h" #include "session.h" #include "tool.h" #include "stat.h" struct event_key { #define INVALID_KEY (~0ULL) u64 key; int info; struct exit_reasons_table *exit_reasons; }; struct kvm_event_stats { u64 time; struct stats stats; }; struct kvm_event { struct list_head hash_entry; struct rb_node rb; struct event_key key; struct kvm_event_stats total; #define DEFAULT_VCPU_NUM 8 int max_vcpu; struct kvm_event_stats *vcpu; }; typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int); struct kvm_event_key { const char *name; key_cmp_fun key; }; struct perf_kvm_stat; struct child_event_ops { void (*get_key)(struct perf_evsel *evsel, struct perf_sample *sample, struct event_key *key); const char *name; }; struct kvm_events_ops { bool (*is_begin_event)(struct perf_evsel *evsel, struct perf_sample *sample, struct event_key *key); bool (*is_end_event)(struct perf_evsel *evsel, struct perf_sample *sample, struct event_key *key); struct child_event_ops *child_ops; void (*decode_key)(struct perf_kvm_stat *kvm, struct event_key *key, char *decode); const char *name; }; struct exit_reasons_table { unsigned long exit_code; const char *reason; }; #define EVENTS_BITS 12 #define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS) struct perf_kvm_stat { struct perf_tool tool; struct record_opts opts; struct perf_evlist *evlist; struct perf_session *session; const char *file_name; const char *report_event; const char *sort_key; int trace_vcpu; struct exit_reasons_table *exit_reasons; const char *exit_reasons_isa; struct kvm_events_ops *events_ops; key_cmp_fun compare; struct list_head kvm_events_cache[EVENTS_CACHE_SIZE]; u64 total_time; u64 total_count; u64 lost_events; u64 duration; struct intlist *pid_list; struct rb_root result; int timerfd; unsigned int display_time; bool live; bool force; }; struct kvm_reg_events_ops { const char *name; struct kvm_events_ops *ops; }; void exit_event_get_key(struct perf_evsel *evsel, struct perf_sample *sample, struct event_key *key); bool exit_event_begin(struct perf_evsel *evsel, struct perf_sample *sample, struct event_key *key); bool exit_event_end(struct perf_evsel *evsel, struct perf_sample *sample, struct event_key *key); void exit_event_decode_key(struct perf_kvm_stat *kvm, struct event_key *key, char *decode); bool kvm_exit_event(struct perf_evsel *evsel); bool kvm_entry_event(struct perf_evsel *evsel); int setup_kvm_events_tp(struct perf_kvm_stat *kvm); #define define_exit_reasons_table(name, symbols) \ static struct exit_reasons_table name[] = { \ symbols, { -1, NULL } \ } /* * arch specific callbacks and data structures */ int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid); extern const char *kvm_events_tp[]; extern struct kvm_reg_events_ops kvm_reg_events_ops[]; extern const char * const kvm_skip_events[]; extern const char *vcpu_id_str; extern const int decode_str_len; extern const char *kvm_exit_reason; extern const char *kvm_entry_trace; extern const char *kvm_exit_trace; #endif /* __PERF_KVM_STAT_H */ adget/function?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>function/u_serial.c
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authorJiri Kosina <jkosina@suse.cz>2017-01-27 22:25:52 +0000
committerIngo Molnar <mingo@kernel.org>2017-01-28 09:18:56 +0100
commitbf29bddf0417a4783da3b24e8c9e017ac649326f (patch)
tree54a05a4883b73f80e4e1d8c4b15750aa01c39932 /drivers/usb/gadget/function/u_serial.c
parent883af14e67e8b8702b5560aa64c888c0cd0bd66c (diff)
x86/efi: Always map the first physical page into the EFI pagetables
Commit: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") stopped creating 1:1 mappings for all RAM, when running in native 64-bit mode. It turns out though that there are 64-bit EFI implementations in the wild (this particular problem has been reported on a Lenovo Yoga 710-11IKB), which still make use of the first physical page for their own private use, even though they explicitly mark it EFI_CONVENTIONAL_MEMORY in the memory map. In case there is no mapping for this particular frame in the EFI pagetables, as soon as firmware tries to make use of it, a triple fault occurs and the system reboots (in case of the Yoga 710-11IKB this is very early during bootup). Fix that by always mapping the first page of physical memory into the EFI pagetables. We're free to hand this page to the BIOS, as trim_bios_range() will reserve the first page and isolate it away from memory allocators anyway. Note that just reverting 129766708 alone is not enough on v4.9-rc1+ to fix the regression on affected hardware, as this commit: ab72a27da ("x86/efi: Consolidate region mapping logic") later made the first physical frame not to be mapped anyway. Reported-by: Hanka Pavlikova <hanka@ucw.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Laura Abbott <labbott@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vojtech Pavlik <vojtech@ucw.cz> Cc: Waiman Long <waiman.long@hpe.com> Cc: linux-efi@vger.kernel.org Cc: stable@kernel.org # v4.8+ Fixes: 129766708 ("x86/efi: Only map RAM into EFI page tables if in mixed-mode") Link: http://lkml.kernel.org/r/20170127222552.22336-1-matt@codeblueprint.co.uk [ Tidied up the changelog and the comment. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/usb/gadget/function/u_serial.c')