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Commit a87af778 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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

Pull s390 bugfixes from Martin Schwidefsky:
 "A collection a bug fixes.  Most of them are minor but two of them are
  more severe.  The linkage stack bug can be used by user space to force
  an oops, with panic_on_oops this is a denial-of-service.  And the dump
  memory detection issue can cause incomplete memory dumps"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/cio: improve cio_commit_config
  s390: fix kernel crash due to linkage stack instructions
  s390/dump: Fix dump memory detection
  s390/appldata: restore missing init_virt_timer()
  s390/qdio: correct program-controlled interruption checking
  s390/qdio: for_each macro correctness
parents 16e5a2ed 1bc8927c

arch/s390/appldata/appldata_base.c

+1 −0
Original line number Diff line number Diff line
@@ -529,6 +529,7 @@ static int __init appldata_init(void) 
{

	int rc;



	init_virt_timer(&appldata_timer);

	appldata_timer.function = appldata_timer_function;

	appldata_timer.data = (unsigned long) &appldata_work;

arch/s390/kernel/head64.S

+5 −2
Original line number Diff line number Diff line
@@ -59,7 +59,7 @@ ENTRY(startup_continue) 
	.quad	0			# cr12: tracing off

	.quad	0			# cr13: home space segment table

	.quad	0xc0000000		# cr14: machine check handling off

	.quad	0			# cr15: linkage stack operations

	.quad	.Llinkage_stack		# cr15: linkage stack operations

.Lpcmsk:.quad	0x0000000180000000

.L4malign:.quad 0xffffffffffc00000

.Lscan2g:.quad	0x80000000 + 0x20000 - 8	# 2GB + 128K - 8
@@ -67,12 +67,15 @@ ENTRY(startup_continue) 
.Lparmaddr:

	.quad	PARMAREA

	.align	64

.Lduct: .long	0,0,0,0,.Lduald,0,0,0

.Lduct: .long	0,.Laste,.Laste,0,.Lduald,0,0,0

	.long	0,0,0,0,0,0,0,0

.Laste:	.quad	0,0xffffffffffffffff,0,0,0,0,0,0

	.align	128

.Lduald:.rept	8

	.long	0x80000000,0,0,0	# invalid access-list entries

	.endr

.Llinkage_stack:

	.long	0,0,0x89000000,0,0,0,0x8a000000,0



ENTRY(_ehead)

arch/s390/mm/page-states.c

+10 −0
Original line number Diff line number Diff line
@@ -12,6 +12,8 @@ 
#include <linux/mm.h>

#include <linux/gfp.h>

#include <linux/init.h>

#include <asm/setup.h>

#include <asm/ipl.h>



#define ESSA_SET_STABLE		1

#define ESSA_SET_UNUSED		2
@@ -41,6 +43,14 @@ void __init cmma_init(void) 


	if (!cmma_flag)

		return;

	/*

	 * Disable CMM for dump, otherwise  the tprot based memory

	 * detection can fail because of unstable pages.

	 */

	if (OLDMEM_BASE || ipl_info.type == IPL_TYPE_FCP_DUMP) {

		cmma_flag = 0;

		return;

	}

	asm volatile(

		"       .insn rrf,0xb9ab0000,%1,%1,0,0\n"

		"0:     la      %0,0\n"

drivers/s390/cio/cio.c

+14 −26
Original line number Diff line number Diff line
@@ -342,8 +342,9 @@ static int cio_check_config(struct subchannel *sch, struct schib *schib) 
 */

int cio_commit_config(struct subchannel *sch)

{

	struct schib schib;

	int ccode, retry, ret = 0;

	struct schib schib;

	struct irb irb;



	if (stsch_err(sch->schid, &schib) || !css_sch_is_valid(&schib))

		return -ENODEV;
@@ -367,7 +368,10 @@ int cio_commit_config(struct subchannel *sch) 
			ret = -EAGAIN;

			break;

		case 1: /* status pending */

			return -EBUSY;

			ret = -EBUSY;

			if (tsch(sch->schid, &irb))

				return ret;

			break;

		case 2: /* busy */

			udelay(100); /* allow for recovery */

			ret = -EBUSY;
@@ -403,7 +407,6 @@ EXPORT_SYMBOL_GPL(cio_update_schib); 
 */

int cio_enable_subchannel(struct subchannel *sch, u32 intparm)

{

	int retry;

	int ret;



	CIO_TRACE_EVENT(2, "ensch");
@@ -418,7 +421,6 @@ int cio_enable_subchannel(struct subchannel *sch, u32 intparm) 
	sch->config.isc = sch->isc;

	sch->config.intparm = intparm;



	for (retry = 0; retry < 3; retry++) {

	ret = cio_commit_config(sch);

	if (ret == -EIO) {

		/*
@@ -426,12 +428,7 @@ int cio_enable_subchannel(struct subchannel *sch, u32 intparm) 
		 * the concurrent sense bit the next time.

		 */

		sch->config.csense = 0;

		} else if (ret == -EBUSY) {

			struct irb irb;

			if (tsch(sch->schid, &irb) != 0)

				break;

		} else

			break;

		ret = cio_commit_config(sch);

	}

	CIO_HEX_EVENT(2, &ret, sizeof(ret));

	return ret;
@@ -444,7 +441,6 @@ EXPORT_SYMBOL_GPL(cio_enable_subchannel); 
 */

int cio_disable_subchannel(struct subchannel *sch)

{

	int retry;

	int ret;



	CIO_TRACE_EVENT(2, "dissch");
@@ -456,16 +452,8 @@ int cio_disable_subchannel(struct subchannel *sch) 
		return -ENODEV;



	sch->config.ena = 0;



	for (retry = 0; retry < 3; retry++) {

	ret = cio_commit_config(sch);

		if (ret == -EBUSY) {

			struct irb irb;

			if (tsch(sch->schid, &irb) != 0)

				break;

		} else

			break;

	}



	CIO_HEX_EVENT(2, &ret, sizeof(ret));

	return ret;

}

drivers/s390/cio/qdio.h

+6 −8
Original line number Diff line number Diff line
@@ -360,13 +360,11 @@ static inline int multicast_outbound(struct qdio_q *q) 
	(unlikely(q->irq_ptr->siga_flag.sync_out_after_pci))



#define for_each_input_queue(irq_ptr, q, i)		\

	for (i = 0, q = irq_ptr->input_qs[0];	\

		i < irq_ptr->nr_input_qs;	\

		q = irq_ptr->input_qs[++i])

	for (i = 0; i < irq_ptr->nr_input_qs &&		\

		({ q = irq_ptr->input_qs[i]; 1; }); i++)

#define for_each_output_queue(irq_ptr, q, i)		\

	for (i = 0, q = irq_ptr->output_qs[0];	\

		i < irq_ptr->nr_output_qs;	\

		q = irq_ptr->output_qs[++i])

	for (i = 0; i < irq_ptr->nr_output_qs &&	\

		({ q = irq_ptr->output_qs[i]; 1; }); i++)



#define prev_buf(bufnr)	\

	((bufnr + QDIO_MAX_BUFFERS_MASK) & QDIO_MAX_BUFFERS_MASK)