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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

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Pull s390 fixes from Martin Schwidefsky:
 "A couple of bug fixes:

   - correct some CPU-MF counter names for z13 and z14

   - correct locking in the vfio-ccw fsm_io_helper function

   - provide arch_uretprobe_is_alive to avoid sigsegv with uretprobes

   - fix a corner case with CPU-MF sampling in regard to execve

   - fix expoline code revert for loadable modules

   - update chpid descriptor for resource accessibility events

   - fix dasd I/O errors due to outdated device alias infomation"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: correct module section names for expoline code revert
  vfio: ccw: process ssch with interrupts disabled
  s390: update sampling tag after task pid change
  s390/cpum_cf: rename IBM z13/z14 counter names
  s390/dasd: fix IO error for newly defined devices
  s390/uprobes: implement arch_uretprobe_is_alive()
  s390/cio: update chpid descriptor after resource accessibility event
This commit is contained in:
Linus Torvalds 2018-04-26 10:29:46 -07:00
commit 1334ac11d9
8 changed files with 62 additions and 18 deletions
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3
arch/s390/include/asm/thread_info.h
View File

@ -45,6 +45,9 @@ struct thread_info {
void arch_release_task_struct(struct task_struct *tsk);
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
void arch_setup_new_exec(void);
#define arch_setup_new_exec arch_setup_new_exec
#endif
/*

4
arch/s390/kernel/module.c
View File

@ -465,11 +465,11 @@ int module_finalize(const Elf_Ehdr *hdr,
apply_alternatives(aseg, aseg + s->sh_size);
if (IS_ENABLED(CONFIG_EXPOLINE) &&
(!strcmp(".nospec_call_table", secname)))
(!strncmp(".s390_indirect", secname, 14)))
nospec_revert(aseg, aseg + s->sh_size);
if (IS_ENABLED(CONFIG_EXPOLINE) &&
(!strcmp(".nospec_return_table", secname)))
(!strncmp(".s390_return", secname, 12)))
nospec_revert(aseg, aseg + s->sh_size);
}

8
arch/s390/kernel/perf_cpum_cf_events.c
View File

@ -123,7 +123,7 @@ CPUMF_EVENT_ATTR(cf_zec12, L1I_OFFBOOK_L3_SOURCED_WRITES_IV, 0x00a1);
CPUMF_EVENT_ATTR(cf_zec12, TX_NC_TABORT, 0x00b1);
CPUMF_EVENT_ATTR(cf_zec12, TX_C_TABORT_NO_SPECIAL, 0x00b2);
CPUMF_EVENT_ATTR(cf_zec12, TX_C_TABORT_SPECIAL, 0x00b3);
CPUMF_EVENT_ATTR(cf_z13, L1D_WRITES_RO_EXCL, 0x0080);
CPUMF_EVENT_ATTR(cf_z13, L1D_RO_EXCL_WRITES, 0x0080);
CPUMF_EVENT_ATTR(cf_z13, DTLB1_WRITES, 0x0081);
CPUMF_EVENT_ATTR(cf_z13, DTLB1_MISSES, 0x0082);
CPUMF_EVENT_ATTR(cf_z13, DTLB1_HPAGE_WRITES, 0x0083);
@ -179,7 +179,7 @@ CPUMF_EVENT_ATTR(cf_z13, TX_C_TABORT_NO_SPECIAL, 0x00db);
CPUMF_EVENT_ATTR(cf_z13, TX_C_TABORT_SPECIAL, 0x00dc);
CPUMF_EVENT_ATTR(cf_z13, MT_DIAG_CYCLES_ONE_THR_ACTIVE, 0x01c0);
CPUMF_EVENT_ATTR(cf_z13, MT_DIAG_CYCLES_TWO_THR_ACTIVE, 0x01c1);
CPUMF_EVENT_ATTR(cf_z14, L1D_WRITES_RO_EXCL, 0x0080);
CPUMF_EVENT_ATTR(cf_z14, L1D_RO_EXCL_WRITES, 0x0080);
CPUMF_EVENT_ATTR(cf_z14, DTLB2_WRITES, 0x0081);
CPUMF_EVENT_ATTR(cf_z14, DTLB2_MISSES, 0x0082);
CPUMF_EVENT_ATTR(cf_z14, DTLB2_HPAGE_WRITES, 0x0083);
@ -371,7 +371,7 @@ static struct attribute *cpumcf_zec12_pmu_event_attr[] __initdata = {
};
static struct attribute *cpumcf_z13_pmu_event_attr[] __initdata = {
CPUMF_EVENT_PTR(cf_z13, L1D_WRITES_RO_EXCL),
CPUMF_EVENT_PTR(cf_z13, L1D_RO_EXCL_WRITES),
CPUMF_EVENT_PTR(cf_z13, DTLB1_WRITES),
CPUMF_EVENT_PTR(cf_z13, DTLB1_MISSES),
CPUMF_EVENT_PTR(cf_z13, DTLB1_HPAGE_WRITES),
@ -431,7 +431,7 @@ static struct attribute *cpumcf_z13_pmu_event_attr[] __initdata = {
};
static struct attribute *cpumcf_z14_pmu_event_attr[] __initdata = {
CPUMF_EVENT_PTR(cf_z14, L1D_WRITES_RO_EXCL),
CPUMF_EVENT_PTR(cf_z14, L1D_RO_EXCL_WRITES),
CPUMF_EVENT_PTR(cf_z14, DTLB2_WRITES),
CPUMF_EVENT_PTR(cf_z14, DTLB2_MISSES),
CPUMF_EVENT_PTR(cf_z14, DTLB2_HPAGE_WRITES),

10
arch/s390/kernel/process.c
View File

@ -29,6 +29,7 @@
#include <linux/random.h>
#include <linux/export.h>
#include <linux/init_task.h>
#include <asm/cpu_mf.h>
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/vtimer.h>
@ -48,6 +49,15 @@ void flush_thread(void)
{
}
void arch_setup_new_exec(void)
{
if (S390_lowcore.current_pid != current->pid) {
S390_lowcore.current_pid = current->pid;
if (test_facility(40))
lpp(&S390_lowcore.lpp);
}
}
void arch_release_task_struct(struct task_struct *tsk)
{
runtime_instr_release(tsk);

9
arch/s390/kernel/uprobes.c
View File

@ -150,6 +150,15 @@ unsigned long arch_uretprobe_hijack_return_addr(unsigned long trampoline,
return orig;
}
bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check ctx,
struct pt_regs *regs)
{
if (ctx == RP_CHECK_CHAIN_CALL)
return user_stack_pointer(regs) <= ret->stack;
else
return user_stack_pointer(regs) < ret->stack;
}
/* Instruction Emulation */
static void adjust_psw_addr(psw_t *psw, unsigned long len)

13
drivers/s390/block/dasd_alias.c
View File

@ -592,13 +592,22 @@ static int _schedule_lcu_update(struct alias_lcu *lcu,
int dasd_alias_add_device(struct dasd_device *device)
{
struct dasd_eckd_private *private = device->private;
struct alias_lcu *lcu;
__u8 uaddr = private->uid.real_unit_addr;
struct alias_lcu *lcu = private->lcu;
unsigned long flags;
int rc;
lcu = private->lcu;
rc = 0;
spin_lock_irqsave(&lcu->lock, flags);
/*
* Check if device and lcu type differ. If so, the uac data may be
* outdated and needs to be updated.
*/
if (private->uid.type != lcu->uac->unit[uaddr].ua_type) {
lcu->flags |= UPDATE_PENDING;
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"uid type mismatch - trigger rescan");
}
if (!(lcu->flags & UPDATE_PENDING)) {
rc = _add_device_to_lcu(lcu, device, device);
if (rc)

14
drivers/s390/cio/chsc.c
View File

@ -452,6 +452,7 @@ static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
{
struct channel_path *chp;
struct chp_link link;
struct chp_id chpid;
int status;
@ -464,10 +465,17 @@ static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
chpid.id = sei_area->rsid;
/* allocate a new channel path structure, if needed */
status = chp_get_status(chpid);
if (status < 0)
chp_new(chpid);
else if (!status)
if (!status)
return;
if (status < 0) {
chp_new(chpid);
} else {
chp = chpid_to_chp(chpid);
mutex_lock(&chp->lock);
chp_update_desc(chp);
mutex_unlock(&chp->lock);
}
memset(&link, 0, sizeof(struct chp_link));
link.chpid = chpid;
if ((sei_area->vf & 0xc0) != 0) {

19
drivers/s390/cio/vfio_ccw_fsm.c
View File

@ -20,12 +20,12 @@ static int fsm_io_helper(struct vfio_ccw_private *private)
int ccode;
__u8 lpm;
unsigned long flags;
int ret;
sch = private->sch;
spin_lock_irqsave(sch->lock, flags);
private->state = VFIO_CCW_STATE_BUSY;
spin_unlock_irqrestore(sch->lock, flags);
orb = cp_get_orb(&private->cp, (u32)(addr_t)sch, sch->lpm);
@ -38,10 +38,12 @@ static int fsm_io_helper(struct vfio_ccw_private *private)
* Initialize device status information
*/
sch->schib.scsw.cmd.actl |= SCSW_ACTL_START_PEND;
return 0;
ret = 0;
break;
case 1: /* Status pending */
case 2: /* Busy */
return -EBUSY;
ret = -EBUSY;
break;
case 3: /* Device/path not operational */
{
lpm = orb->cmd.lpm;
@ -51,13 +53,16 @@ static int fsm_io_helper(struct vfio_ccw_private *private)
sch->lpm = 0;
if (cio_update_schib(sch))
return -ENODEV;
return sch->lpm ? -EACCES : -ENODEV;
ret = -ENODEV;
else
ret = sch->lpm ? -EACCES : -ENODEV;
break;
}
default:
return ccode;
ret = ccode;
}
spin_unlock_irqrestore(sch->lock, flags);
return ret;
}
static void fsm_notoper(struct vfio_ccw_private *private,