Merge "Seemp: Processing new KP report" (b19b98f7) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/platform/msm/seemp_core/seemp_logk.c

+20 −54

Original line number	Diff line number	Diff line
		@@ -27,7 +27,7 @@
		#define YEAR_BASE 1900

		#define EL2_SCM_ID 0x02001902
		#define KP_EL2_REPORT_REVISION 0x01000101
		#define KP_EL2_REPORT_REVISION 0x01000110
		#define INVALID_PID -1

		#define EL2_SCM_ID2 0x02001905
		@@ -65,7 +65,6 @@ static long seemp_logk_reserve_rdblks(
		static long seemp_logk_set_mask(unsigned long arg);
		static long seemp_logk_set_mapping(unsigned long arg);
		static long seemp_logk_check_filter(unsigned long arg);
		static pid_t seemp_logk_get_pid(struct task_struct *t);
		static int seemp_logk_rtic_thread(void *data);

		void* (seemp_logk_kernel_begin)(char *buf);
		@@ -605,71 +604,38 @@ static const struct file_operations seemp_logk_fops = {
		.mmap = seemp_logk_mmap,
		};

		static pid_t seemp_logk_get_pid(struct task_struct *t)
		{
		struct task_struct *task;
		pid_t pid;

		if (t == NULL)
		return INVALID_PID;

		rcu_read_lock();
		for_each_process(task) {
		if (task == t) {
		pid = task->pid;
		rcu_read_unlock();
		return pid;
		}
		}
		rcu_read_unlock();
		return INVALID_PID;
		}

		static int seemp_logk_rtic_thread(void *data)
		{
		struct el2_report_header_t *header;
		__u64 last_sequence_number = 0;
		int last_pos = -1;
		int i;
		int num_entries = (PAGE_SIZE - sizeof(struct el2_report_header_t))
		/ sizeof(struct el2_report_data_t);
		header = (struct el2_report_header_t *) el2_shared_mem;

		if (header->report_version < KP_EL2_REPORT_REVISION)
		return -EINVAL;

		while (!kthread_should_stop()) {
		for (i = 1; i < num_entries + 1; i++) {
		struct el2_report_data_t *report;
		int cur_pos = last_pos + i;

		if (cur_pos >= num_entries)
		cur_pos -= num_entries;
		struct el2_actor_report_t *report;

		report = el2_shared_mem +
		sizeof(struct el2_report_header_t);

		for (i = 0; i < report->actor_count; i++) {
		struct el2_actor_data_t *actor;

		actor = el2_shared_mem +
		sizeof(struct el2_report_header_t) +
		cur_pos * sizeof(struct el2_report_data_t);
		sizeof(struct el2_actor_report_t) +
		i * (sizeof(struct el2_actor_data_t));

		/* determine legitimacy of report */
		if (report->report_valid &&
		(last_sequence_number == 0
		\|\| report->sequence_number >
		last_sequence_number)) {
		seemp_logk_rtic(report->report_type,
		seemp_logk_get_pid(
		(struct task_struct *)
		report->actor),
		/* leave this empty until
		actor->pid,
		/*
		* leave this empty until
		* asset id is provided
		*/
		"",
		report->asset_category,
		report->response);
		last_sequence_number = report->sequence_number;
		} else {
		last_pos = cur_pos - 1;
		break;
		}
		}

		/* periodically check el2 report every second */

drivers/platform/msm/seemp_core/seemp_logk.h

+21 −0

Original line number	Diff line number	Diff line
		@@ -183,4 +183,25 @@ struct el2_report_data_t {
		__u8 response; /* Response From EL2 */
		};

		struct el2_actor_report_t {
		__u32 mpgen_interface_ver;
		/* duplicate MP version, used for API verification */
		__u64 num_incidents; /* number of incidents */
		__u8 protection_enabled; /* states if protection is enabled */
		__u64 spare; /* reserve 64bit for future use */
		__u64 timestamp; /* time of report */
		__u8 report_type; /* type of report: info or incident */
		__u8 asset_category; /* category of affected asset: ro, wo etc */
		__s8 asset_name[24]; /* name of affected asset */
		__u8 response; /* type of response: allow or restrict */
		__u32 actor_count; /* number of actors involved */
		};

		struct el2_actor_data_t {
		__s32 pid; /pid of actor process /
		__s64 state; /* state of actor process */
		__s8 name[16]; /* name of actor process */
		};


		#endif