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Commit bfed6d0f authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 's390-5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 

Pull s390 fixes from Martin Schwidefsky:
 "Improvements and bug fixes for 5.1-rc2:

   - Fix early free of the channel program in vfio

   - On AP device removal make sure that all messages are flushed with
     the driver still attached that queued the message

   - Limit brk randomization to 32MB to reduce the chance that the heap
     of ld.so is placed after the main stack

   - Add a rolling average for the steal time of a CPU, this will be
     needed for KVM to decide when to do busy waiting

   - Fix a warning in the CPU-MF code

   - Add a notification handler for AP configuration change to react
     faster to new AP devices"

* tag 's390-5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/cpumf: Fix warning from check_processor_id
  zcrypt: handle AP Info notification from CHSC SEI command
  vfio: ccw: only free cp on final interrupt
  s390/vtime: steal time exponential moving average
  s390/zcrypt: revisit ap device remove procedure
  s390: limit brk randomization to 32MB
parents 97c41a6b b6ffdf27

arch/s390/include/asm/ap.h

+11 −0
Original line number Diff line number Diff line
@@ -360,4 +360,15 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid, 
	return reg1;

}



/*

 * Interface to tell the AP bus code that a configuration

 * change has happened. The bus code should at least do

 * an ap bus resource rescan.

 */

#if IS_ENABLED(CONFIG_ZCRYPT)

void ap_bus_cfg_chg(void);

#else

static inline void ap_bus_cfg_chg(void){};

#endif



#endif /* _ASM_S390_AP_H_ */

arch/s390/include/asm/elf.h

+7 −4
Original line number Diff line number Diff line
@@ -252,11 +252,14 @@ do { \ 


/*

 * Cache aliasing on the latest machines calls for a mapping granularity

 * of 512KB. For 64-bit processes use a 512KB alignment and a randomization

 * of up to 1GB. For 31-bit processes the virtual address space is limited,

 * use no alignment and limit the randomization to 8MB.

 * of 512KB for the anonymous mapping base. For 64-bit processes use a

 * 512KB alignment and a randomization of up to 1GB. For 31-bit processes

 * the virtual address space is limited, use no alignment and limit the

 * randomization to 8MB.

 * For the additional randomization of the program break use 32MB for

 * 64-bit and 8MB for 31-bit.

 */

#define BRK_RND_MASK	(is_compat_task() ? 0x7ffUL : 0x3ffffUL)

#define BRK_RND_MASK	(is_compat_task() ? 0x7ffUL : 0x1fffUL)

#define MMAP_RND_MASK	(is_compat_task() ? 0x7ffUL : 0x3ff80UL)

#define MMAP_ALIGN_MASK	(is_compat_task() ? 0 : 0x7fUL)

#define STACK_RND_MASK	MMAP_RND_MASK

arch/s390/include/asm/lowcore.h

+31 −30
Original line number Diff line number Diff line
@@ -91,52 +91,53 @@ struct lowcore { 
	__u64	hardirq_timer;			/* 0x02e8 */

	__u64	softirq_timer;			/* 0x02f0 */

	__u64	steal_timer;			/* 0x02f8 */

	__u64	last_update_timer;		/* 0x0300 */

	__u64	last_update_clock;		/* 0x0308 */

	__u64	int_clock;			/* 0x0310 */

	__u64	mcck_clock;			/* 0x0318 */

	__u64	clock_comparator;		/* 0x0320 */

	__u64	boot_clock[2];			/* 0x0328 */

	__u64	avg_steal_timer;		/* 0x0300 */

	__u64	last_update_timer;		/* 0x0308 */

	__u64	last_update_clock;		/* 0x0310 */

	__u64	int_clock;			/* 0x0318*/

	__u64	mcck_clock;			/* 0x0320 */

	__u64	clock_comparator;		/* 0x0328 */

	__u64	boot_clock[2];			/* 0x0330 */



	/* Current process. */

	__u64	current_task;			/* 0x0338 */

	__u64	kernel_stack;			/* 0x0340 */

	__u64	current_task;			/* 0x0340 */

	__u64	kernel_stack;			/* 0x0348 */



	/* Interrupt, DAT-off and restartstack. */

	__u64	async_stack;			/* 0x0348 */

	__u64	nodat_stack;			/* 0x0350 */

	__u64	restart_stack;			/* 0x0358 */

	__u64	async_stack;			/* 0x0350 */

	__u64	nodat_stack;			/* 0x0358 */

	__u64	restart_stack;			/* 0x0360 */



	/* Restart function and parameter. */

	__u64	restart_fn;			/* 0x0360 */

	__u64	restart_data;			/* 0x0368 */

	__u64	restart_source;			/* 0x0370 */

	__u64	restart_fn;			/* 0x0368 */

	__u64	restart_data;			/* 0x0370 */

	__u64	restart_source;			/* 0x0378 */



	/* Address space pointer. */

	__u64	kernel_asce;			/* 0x0378 */

	__u64	user_asce;			/* 0x0380 */

	__u64	vdso_asce;			/* 0x0388 */

	__u64	kernel_asce;			/* 0x0380 */

	__u64	user_asce;			/* 0x0388 */

	__u64	vdso_asce;			/* 0x0390 */



	/*

	 * The lpp and current_pid fields form a

	 * 64-bit value that is set as program

	 * parameter with the LPP instruction.

	 */

	__u32	lpp;				/* 0x0390 */

	__u32	current_pid;			/* 0x0394 */

	__u32	lpp;				/* 0x0398 */

	__u32	current_pid;			/* 0x039c */



	/* SMP info area */

	__u32	cpu_nr;				/* 0x0398 */

	__u32	softirq_pending;		/* 0x039c */

	__u32	preempt_count;			/* 0x03a0 */

	__u32	spinlock_lockval;		/* 0x03a4 */

	__u32	spinlock_index;			/* 0x03a8 */

	__u32	fpu_flags;			/* 0x03ac */

	__u64	percpu_offset;			/* 0x03b0 */

	__u64	vdso_per_cpu_data;		/* 0x03b8 */

	__u64	machine_flags;			/* 0x03c0 */

	__u64	gmap;				/* 0x03c8 */

	__u8	pad_0x03d0[0x0400-0x03d0];	/* 0x03d0 */

	__u32	cpu_nr;				/* 0x03a0 */

	__u32	softirq_pending;		/* 0x03a4 */

	__u32	preempt_count;			/* 0x03a8 */

	__u32	spinlock_lockval;		/* 0x03ac */

	__u32	spinlock_index;			/* 0x03b0 */

	__u32	fpu_flags;			/* 0x03b4 */

	__u64	percpu_offset;			/* 0x03b8 */

	__u64	vdso_per_cpu_data;		/* 0x03c0 */

	__u64	machine_flags;			/* 0x03c8 */

	__u64	gmap;				/* 0x03d0 */

	__u8	pad_0x03d8[0x0400-0x03d8];	/* 0x03d8 */



	/* br %r1 trampoline */

	__u16	br_r1_trampoline;		/* 0x0400 */

arch/s390/kernel/perf_cpum_cf_diag.c

+13 −6
Original line number Diff line number Diff line
@@ -196,23 +196,30 @@ static void cf_diag_perf_event_destroy(struct perf_event *event) 
 */

static int __hw_perf_event_init(struct perf_event *event)

{

	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);

	struct perf_event_attr *attr = &event->attr;

	struct cpu_cf_events *cpuhw;

	enum cpumf_ctr_set i;

	int err = 0;



	debug_sprintf_event(cf_diag_dbg, 5,

			    "%s event %p cpu %d authorized %#x\n", __func__,

			    event, event->cpu, cpuhw->info.auth_ctl);

	debug_sprintf_event(cf_diag_dbg, 5, "%s event %p cpu %d\n", __func__,

			    event, event->cpu);



	event->hw.config = attr->config;

	event->hw.config_base = 0;

	local64_set(&event->count, 0);



	/* Add all authorized counter sets to config_base */

	/* Add all authorized counter sets to config_base. The

	 * the hardware init function is either called per-cpu or just once

	 * for all CPUS (event->cpu == -1).  This depends on the whether

	 * counting is started for all CPUs or on a per workload base where

	 * the perf event moves from one CPU to another CPU.

	 * Checking the authorization on any CPU is fine as the hardware

	 * applies the same authorization settings to all CPUs.

	 */

	cpuhw = &get_cpu_var(cpu_cf_events);

	for (i = CPUMF_CTR_SET_BASIC; i < CPUMF_CTR_SET_MAX; ++i)

		if (cpuhw->info.auth_ctl & cpumf_ctr_ctl[i])

			event->hw.config_base |= cpumf_ctr_ctl[i];

	put_cpu_var(cpu_cf_events);



	/* No authorized counter sets, nothing to count/sample */

	if (!event->hw.config_base) {

arch/s390/kernel/smp.c

+2 −1
Original line number Diff line number Diff line
@@ -266,7 +266,8 @@ static void pcpu_prepare_secondary(struct pcpu *pcpu, int cpu) 
	lc->percpu_offset = __per_cpu_offset[cpu];

	lc->kernel_asce = S390_lowcore.kernel_asce;

	lc->machine_flags = S390_lowcore.machine_flags;

	lc->user_timer = lc->system_timer = lc->steal_timer = 0;

	lc->user_timer = lc->system_timer =

		lc->steal_timer = lc->avg_steal_timer = 0;

	__ctl_store(lc->cregs_save_area, 0, 15);

	save_access_regs((unsigned int *) lc->access_regs_save_area);

	memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list,