linux-toradex.git/arch/powerpc/kernel, branch v2.6.16.45

POWERPC: Make alignment exception always check exception table

2006-11-20T21:45:49+00:00

The alignment exception used to only check the exception table for
-EFAULT, not for other errors. That opens an oops window if we can
coerce the kernel into getting an alignment exception for other reasons
in what would normally be a user-protected accessor, which can be done
via some of the futex ops. This fixes it by always checking the
exception tables.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Adrian Bunk

powerpc: Clear HID0 attention enable on PPC970 at boot time (CVE-2006-4093)

2006-08-18T19:44:57+00:00

Clear HID0[en_attn] at CPU init time on PPC970.  Closes CVE-2006-4093.

Signed-off-by: Olof Johansson 
Signed-off-by: Paul Mackerras 
Signed-off-by: Adrian Bunk

[PATCH] powerpc: Fix machine check problem on 32-bit kernels (CVE-2006-2448)

2006-06-20T08:54:52+00:00

This fixes a bug found by Dave Jones that means that it is possible
for userspace to provoke a machine check on 32-bit kernels.  This
also fixes a couple of other places where I found similar problems
by inspection.

Signed-off-by: Paul Mackerras 
Signed-off-by: Chris Wright

[PATCH] powerpc: fix incorrect SA_ONSTACK behaviour for 64-bit processes

2006-04-17T20:16:04+00:00

*) When setting a sighandler using sigaction() call, if the flag
SA_ONSTACK is set and no alternate stack is provided via sigaltstack(),
the kernel still try to install the alternate stack. This behavior is
the opposite of the one which is documented in Single Unix
Specifications V3.

*) Also when setting an alternate stack using sigaltstack() with the
flag SS_DISABLE, the kernel try to install the alternate stack on
signal delivery.

These two use cases makes the process crash at signal delivery.

This fixes it.

Signed-off-by: Laurent Meyer 
Signed-off-by: Paul Mackerras 
Signed-off-by: Greg Kroah-Hartman

[PATCH] powerpc: iSeries needs slb_initialize to be called

2006-04-17T20:16:03+00:00

Since the powerpc 64k pages patch went in, systems that have SLBs
(like Power4 iSeries) needed to have slb_initialize called to set up
some variables for the SLB miss handler.  This was not being called
on the boot processor on iSeries, so on single cpu iSeries machines,
we would get apparent memory curruption as soon as we entered user mode.

This patch fixes that by calling slb_initialize on the boot cpu if the
processor has an SLB.

Signed-off-by: Stephen Rothwell 
Signed-off-by: Greg Kroah-Hartman

[PATCH] powerpc: make ISA floppies work again

2006-04-07T16:44:27+00:00

We used to assume that a DMA mapping request with a NULL dev was for
ISA DMA.  This assumption was broken at some point.  Now we explicitly
pass the detected ISA PCI device in the floppy setup.

Signed-off-by: Stephen Rothwell 
Signed-off-by: Greg Kroah-Hartman

[PATCH] powerpc: properly configure DDR/P5IOC children devs

2006-03-16T05:55:07+00:00

The dynamic add path for PCI Host Bridges can fail to configure children
adapters under P5IOC controllers.  It fails to properly fixup bus/device
resources, and it fails to properly enable EEH.  Both of these steps
need to occur before any children devices are enabled in
pci_bus_add_devices().

Signed-off-by: John Rose 
Signed-off-by: Paul Mackerras

[PATCH] powerpc: remove duplicate EXPORT_SYMBOLS

2006-03-16T05:55:05+00:00

remove warnings when building a 64bit kernel.
smp_call_function triggers also with 32bit kernel.

WARNING: vmlinux: duplicate symbol 'smp_call_function' previous definition was in vmlinux
arch/powerpc/kernel/ppc_ksyms.c:164:EXPORT_SYMBOL(smp_call_function);
arch/powerpc/kernel/smp.c:300:EXPORT_SYMBOL(smp_call_function);

WARNING: vmlinux: duplicate symbol 'ioremap' previous definition was in vmlinux
arch/powerpc/kernel/ppc_ksyms.c:113:EXPORT_SYMBOL(ioremap);
arch/powerpc/mm/pgtable_64.c:321:EXPORT_SYMBOL(ioremap);

WARNING: vmlinux: duplicate symbol '__ioremap' previous definition was in vmlinux
arch/powerpc/kernel/ppc_ksyms.c:117:EXPORT_SYMBOL(__ioremap);
arch/powerpc/mm/pgtable_64.c:322:EXPORT_SYMBOL(__ioremap);

WARNING: vmlinux: duplicate symbol 'iounmap' previous definition was in vmlinux
arch/powerpc/kernel/ppc_ksyms.c:118:EXPORT_SYMBOL(iounmap);
arch/powerpc/mm/pgtable_64.c:323:EXPORT_SYMBOL(iounmap);

Signed-off-by: Olaf Hering 
Signed-off-by: Paul Mackerras

[PATCH] powerpc: RTC memory corruption

2006-03-16T05:55:03+00:00

We should be memset'ing the data we are pointing to, not the pointer
itself.  This is in an error path so we probably don't hit it much.

Signed-off-by: Michael Neuling 
Signed-off-by: Paul Mackerras

powerpc: Fix problem with time going backwards

2006-03-16T05:54:55+00:00

The recent changes to keep gettimeofday in sync with xtime had the side
effect that it was occasionally possible for the time reported by
gettimeofday to go back by a microsecond.  There were two reasons:
(1) when we recalculated the offsets used by gettimeofday every 2^31
timebase ticks, we lost an accumulated fractional microsecond, and
(2) because the update is done some time after the notional start of
jiffy, if ntp is slowing the clock, it is possible to see time go backwards
when the timebase factor gets reduced.

This fixes it by (a) slowing the gettimeofday clock by about 1us in
2^31 timebase ticks (a factor of less than 1 in 3.7 million), and (b)
adjusting the timebase offsets in the rare case that the gettimeofday
result could possibly go backwards (i.e. when ntp is slowing the clock
and the timer interrupt is late).  In this case the adjustment will
reduce to zero eventually because of (a).

Signed-off-by: Paul Mackerras