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Date: Tue, 11 Feb 2014 09:07:50 +0100
From: Martin Schwidefsky <schwidefsky@...ibm.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel <linux-kernel@...r.kernel.org>,
linux-s390 <linux-s390@...r.kernel.org>,
Heiko Carstens <heiko.carstens@...ibm.com>
Subject: [GIT PULL] s390 bug fixes for the 3.14-rc3
Hi Linus,
please pull from the 'for-linus' branch of
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git for-linus
to receive the following updates:
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.
Gerald Schaefer (1):
s390/appldata: restore missing init_virt_timer()
Jose Alonso (1):
s390/qdio: for_each macro correctness
Martin Schwidefsky (1):
s390: fix kernel crash due to linkage stack instructions
Michael Holzheu (1):
s390/dump: Fix dump memory detection
Sebastian Ott (1):
s390/cio: improve cio_commit_config
Ursula Braun (1):
s390/qdio: correct program-controlled interruption checking
arch/s390/appldata/appldata_base.c | 1 +
arch/s390/kernel/head64.S | 7 +++++--
arch/s390/mm/page-states.c | 10 +++++++++
drivers/s390/cio/cio.c | 40 +++++++++++++-----------------------
drivers/s390/cio/qdio.h | 14 ++++++-------
drivers/s390/cio/qdio_main.c | 2 +-
6 files changed, 37 insertions(+), 37 deletions(-)
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index 4c4a1ce..47c8630 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -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;
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index b9e25ae..d7c0050 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -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)
diff --git a/arch/s390/mm/page-states.c b/arch/s390/mm/page-states.c
index a90d45e..27c50f4 100644
--- a/arch/s390/mm/page-states.c
+++ b/arch/s390/mm/page-states.c
@@ -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"
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 88e35d8..8ee88c4 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -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");
@@ -418,20 +421,14 @@ 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) {
+ /*
+ * Got a program check in msch. Try without
+ * the concurrent sense bit the next time.
+ */
+ sch->config.csense = 0;
ret = cio_commit_config(sch);
- if (ret == -EIO) {
- /*
- * Got a program check in msch. Try without
- * 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;
}
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;
+ ret = cio_commit_config(sch);
- 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;
}
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 8acaae1..a563e4c 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -359,14 +359,12 @@ static inline int multicast_outbound(struct qdio_q *q)
#define need_siga_sync_out_after_pci(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])
-#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])
+#define for_each_input_queue(irq_ptr, q, 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; 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)
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index c883a08..77466c4 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -996,7 +996,7 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr)
}
}
- if (!pci_out_supported(q))
+ if (!(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED))
return;
for_each_output_queue(irq_ptr, q, i) {
--
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