kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse source 
Pull perf updates from Ingo Molnar:
 "The main kernel side changes in this cycle were:

   - Various Intel-PT updates and optimizations (Alexander Shishkin)

   - Prohibit kprobes on Xen/KVM emulate prefixes (Masami Hiramatsu)

   - Add support for LSM and SELinux checks to control access to the
     perf syscall (Joel Fernandes)

   - Misc other changes, optimizations, fixes and cleanups - see the
     shortlog for details.

  There were numerous tooling changes as well - 254 non-merge commits.
  Here are the main changes - too many to list in detail:

   - Enhancements to core tooling infrastructure, perf.data, libperf,
     libtraceevent, event parsing, vendor events, Intel PT, callchains,
     BPF support and instruction decoding.

   - There were updates to the following tools:

        perf annotate
        perf diff
        perf inject
        perf kvm
        perf list
        perf maps
        perf parse
        perf probe
        perf record
        perf report
        perf script
        perf stat
        perf test
        perf trace

   - And a lot of other changes: please see the shortlog and Git log for
     more details"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (279 commits)
  perf parse: Fix potential memory leak when handling tracepoint errors
  perf probe: Fix spelling mistake "addrees" -> "address"
  libtraceevent: Fix memory leakage in copy_filter_type
  libtraceevent: Fix header installation
  perf intel-bts: Does not support AUX area sampling
  perf intel-pt: Add support for decoding AUX area samples
  perf intel-pt: Add support for recording AUX area samples
  perf pmu: When using default config, record which bits of config were changed by the user
  perf auxtrace: Add support for queuing AUX area samples
  perf session: Add facility to peek at all events
  perf auxtrace: Add support for dumping AUX area samples
  perf inject: Cut AUX area samples
  perf record: Add aux-sample-size config term
  perf record: Add support for AUX area sampling
  perf auxtrace: Add support for AUX area sample recording
  perf auxtrace: Move perf_evsel__find_pmu()
  perf record: Add a function to test for kernel support for AUX area sampling
  perf tools: Add kernel AUX area sampling definitions
  perf/core: Make the mlock accounting simple again
  perf report: Jump to symbol source view from total cycles view
  ...
This commit is contained in:
Linus Torvalds 2019-11-26 15:04:47 -08:00
commit 3f59dbcace
297 changed files with 44924 additions and 35331 deletions
Download patch file Download diff file Expand all files Collapse all files

15
include/linux/lsm_hooks.h
View file

@ -1818,6 +1818,14 @@ union security_list_options {
void (*bpf_prog_free_security)(struct bpf_prog_aux *aux);
#endif /* CONFIG_BPF_SYSCALL */
int (*locked_down)(enum lockdown_reason what);
#ifdef CONFIG_PERF_EVENTS
int (*perf_event_open)(struct perf_event_attr *attr, int type);
int (*perf_event_alloc)(struct perf_event *event);
void (*perf_event_free)(struct perf_event *event);
int (*perf_event_read)(struct perf_event *event);
int (*perf_event_write)(struct perf_event *event);
#endif
};
struct security_hook_heads {
@ -2060,6 +2068,13 @@ struct security_hook_heads {
struct hlist_head bpf_prog_free_security;
#endif /* CONFIG_BPF_SYSCALL */
struct hlist_head locked_down;
#ifdef CONFIG_PERF_EVENTS
struct hlist_head perf_event_open;
struct hlist_head perf_event_alloc;
struct hlist_head perf_event_free;
struct hlist_head perf_event_read;
struct hlist_head perf_event_write;
#endif
} __randomize_layout;
/*

64
include/linux/perf_event.h
View file

@ -56,6 +56,7 @@ struct perf_guest_info_callbacks {
#include <linux/perf_regs.h>
#include <linux/cgroup.h>
#include <linux/refcount.h>
#include <linux/security.h>
#include <asm/local.h>
struct perf_callchain_entry {
@ -248,6 +249,8 @@ struct perf_event;
#define PERF_PMU_CAP_NO_EXCLUDE 0x80
#define PERF_PMU_CAP_AUX_OUTPUT 0x100
struct perf_output_handle;
/**
* struct pmu - generic performance monitoring unit
*/
@ -409,6 +412,15 @@ struct pmu {
*/
size_t task_ctx_size;
/*
* PMU specific parts of task perf event context (i.e. ctx->task_ctx_data)
* can be synchronized using this function. See Intel LBR callstack support
* implementation and Perf core context switch handling callbacks for usage
* examples.
*/
void (*swap_task_ctx) (struct perf_event_context *prev,
struct perf_event_context *next);
/* optional */
/*
* Set up pmu-private data structures for an AUX area
@ -422,6 +434,19 @@ struct pmu {
*/
void (*free_aux) (void *aux); /* optional */
/*
* Take a snapshot of the AUX buffer without touching the event
* state, so that preempting ->start()/->stop() callbacks does
* not interfere with their logic. Called in PMI context.
*
* Returns the size of AUX data copied to the output handle.
*
* Optional.
*/
long (*snapshot_aux) (struct perf_event *event,
struct perf_output_handle *handle,
unsigned long size);
/*
* Validate address range filters: make sure the HW supports the
* requested configuration and number of filters; return 0 if the
@ -721,6 +746,9 @@ struct perf_event {
struct perf_cgroup *cgrp; /* cgroup event is attach to */
#endif
#ifdef CONFIG_SECURITY
void *security;
#endif
struct list_head sb_list;
#endif /* CONFIG_PERF_EVENTS */
};
@ -960,6 +988,7 @@ struct perf_sample_data {
u32 reserved;
} cpu_entry;
struct perf_callchain_entry *callchain;
u64 aux_size;
/*
* regs_user may point to task_pt_regs or to regs_user_copy, depending
@ -1241,19 +1270,41 @@ extern int perf_cpu_time_max_percent_handler(struct ctl_table *table, int write,
int perf_event_max_stack_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos);
static inline bool perf_paranoid_tracepoint_raw(void)
/* Access to perf_event_open(2) syscall. */
#define PERF_SECURITY_OPEN 0
/* Finer grained perf_event_open(2) access control. */
#define PERF_SECURITY_CPU 1
#define PERF_SECURITY_KERNEL 2
#define PERF_SECURITY_TRACEPOINT 3
static inline int perf_is_paranoid(void)
{
return sysctl_perf_event_paranoid > -1;
}
static inline bool perf_paranoid_cpu(void)
static inline int perf_allow_kernel(struct perf_event_attr *attr)
{
return sysctl_perf_event_paranoid > 0;
if (sysctl_perf_event_paranoid > 1 && !capable(CAP_SYS_ADMIN))
return -EACCES;
return security_perf_event_open(attr, PERF_SECURITY_KERNEL);
}
static inline bool perf_paranoid_kernel(void)
static inline int perf_allow_cpu(struct perf_event_attr *attr)
{
return sysctl_perf_event_paranoid > 1;
if (sysctl_perf_event_paranoid > 0 && !capable(CAP_SYS_ADMIN))
return -EACCES;
return security_perf_event_open(attr, PERF_SECURITY_CPU);
}
static inline int perf_allow_tracepoint(struct perf_event_attr *attr)
{
if (sysctl_perf_event_paranoid > -1 && !capable(CAP_SYS_ADMIN))
return -EPERM;
return security_perf_event_open(attr, PERF_SECURITY_TRACEPOINT);
}
extern void perf_event_init(void);
@ -1327,6 +1378,9 @@ extern unsigned int perf_output_copy(struct perf_output_handle *handle,
const void *buf, unsigned int len);
extern unsigned int perf_output_skip(struct perf_output_handle *handle,
unsigned int len);
extern long perf_output_copy_aux(struct perf_output_handle *aux_handle,
struct perf_output_handle *handle,
unsigned long from, unsigned long to);
extern int perf_swevent_get_recursion_context(void);
extern void perf_swevent_put_recursion_context(int rctx);
extern u64 perf_swevent_set_period(struct perf_event *event);

39
include/linux/security.h
View file

@ -1895,5 +1895,42 @@ static inline void security_bpf_prog_free(struct bpf_prog_aux *aux)
#endif /* CONFIG_SECURITY */
#endif /* CONFIG_BPF_SYSCALL */
#endif /* ! __LINUX_SECURITY_H */
#ifdef CONFIG_PERF_EVENTS
struct perf_event_attr;
struct perf_event;
#ifdef CONFIG_SECURITY
extern int security_perf_event_open(struct perf_event_attr *attr, int type);
extern int security_perf_event_alloc(struct perf_event *event);
extern void security_perf_event_free(struct perf_event *event);
extern int security_perf_event_read(struct perf_event *event);
extern int security_perf_event_write(struct perf_event *event);
#else
static inline int security_perf_event_open(struct perf_event_attr *attr,
int type)
{
return 0;
}
static inline int security_perf_event_alloc(struct perf_event *event)
{
return 0;
}
static inline void security_perf_event_free(struct perf_event *event)
{
}
static inline int security_perf_event_read(struct perf_event *event)
{
return 0;
}
static inline int security_perf_event_write(struct perf_event *event)
{
return 0;
}
#endif /* CONFIG_SECURITY */
#endif /* CONFIG_PERF_EVENTS */
#endif /* ! __LINUX_SECURITY_H */