linux-toradex.git/arch, branch v3.1.4

ARM: 7150/1: Allow kernel unaligned accesses on ARMv6+ processors

2011-11-26T17:08:33+00:00

commit 8428e84d42179c2a00f5f6450866e70d802d1d05 upstream.

Recent gcc versions generate unaligned accesses by default on ARMv6 and
later processors. This patch ensures that the SCTLR.A bit is always
cleared on such processors to avoid kernel traping before
alignment_init() is called.

Signed-off-by: Catalin Marinas 
Tested-by: John Linn 
Acked-by: Nicolas Pitre 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

KVM: s390: Fix RUNNING flag misinterpretation

2011-11-26T17:08:33+00:00

commit 9e6dabeffd1d0ec2aa19aa076c4886067238d442 upstream.

CPUSTAT_RUNNING was implemented signifying that a vcpu is not stopped.
This is not, however, what the architecture says: RUNNING should be
set when the host is acting on the behalf of the guest operating
system.

CPUSTAT_RUNNING has been changed to be set in kvm_arch_vcpu_load()
and to be unset in kvm_arch_vcpu_put().

For signifying stopped state of a vcpu, a host-controlled bit has
been used and is set/unset basically on the reverse as the old
CPUSTAT_RUNNING bit (including pushing it down into stop handling
proper in handle_stop()).

Signed-off-by: Cornelia Huck 
Signed-off-by: Carsten Otte 
Signed-off-by: Avi Kivity 
Signed-off-by: Greg Kroah-Hartman

powerpc: Copy down exception vectors after feature fixups

2011-11-21T22:35:28+00:00

commit d715e433b7ad19c02fc4becf0d5e9a59f97925de upstream.

kdump fails because we try to execute an HV only instruction. Feature
fixups are being applied after we copy the exception vectors down to 0
so they miss out on any updates.

We have always had this issue but it only became critical in v3.0
when we added CFAR support (breaks POWER5) and v3.1 when we added
POWERNV (breaks everyone).

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

powerpc: Add hvcall.h include to book3s_hv.c

2011-11-21T22:35:27+00:00

commit de1d9248eadd27539eba449b4d09428252e80c04 upstream.

If you build with KVM and UP it fails with the following due to a
missing include.

/arch/powerpc/kvm/book3s_hv.c: In function 'do_h_register_vpa':
arch/powerpc/kvm/book3s_hv.c:156:10: error: 'H_PARAMETER' undeclared (first use in this function)
arch/powerpc/kvm/book3s_hv.c:156:10: note: each undeclared identifier is reported only once for each function it appears in
arch/powerpc/kvm/book3s_hv.c:192:12: error: 'H_RESOURCE' undeclared (first use in this function)
arch/powerpc/kvm/book3s_hv.c:222:9: error: 'H_SUCCESS' undeclared (first use in this function)
arch/powerpc/kvm/book3s_hv.c: In function 'kvmppc_pseries_do_hcall':
arch/powerpc/kvm/book3s_hv.c:228:30: error: 'H_SUCCESS' undeclared (first use in this function)
arch/powerpc/kvm/book3s_hv.c:232:7: error: 'H_CEDE' undeclared (first use in this function)
arch/powerpc/kvm/book3s_hv.c:234:7: error: 'H_PROD' undeclared (first use in this function)
arch/powerpc/kvm/book3s_hv.c:238:10: error: 'H_PARAMETER' undeclared (first use in this function)
arch/powerpc/kvm/book3s_hv.c:250:7: error: 'H_CONFER' undeclared (first use in this function)
arch/powerpc/kvm/book3s_hv.c:252:7: error: 'H_REGISTER_VPA' undeclared (first use in this function)
make[2]: *** [arch/powerpc/kvm/book3s_hv.o] Error 1

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

powerpc/ps3: Fix lost SMP IPIs

2011-11-21T22:35:26+00:00

commit 72f3bea075287785ed32b777b6dd2636aa7002e8 upstream.

Fixes the PS3 bootup hang introduced in 3.0-rc1 by:

  commit 317f394160e9beb97d19a84c39b7e5eb3d7815a
  sched: Move the second half of ttwu() to the remote cpu

Move the PS3's LV1 EOI call lv1_end_of_interrupt_ext() from ps3_chip_eoi()
to ps3_get_irq() for IPI messages.

If lv1_send_event_locally() is called between a previous call to
lv1_send_event_locally() and the coresponding call to
lv1_end_of_interrupt_ext() the second event will not be delivered to the
target cpu.

The PS3's SMP IPIs are implemented using lv1_send_event_locally(), so if two
IPI messages of the same type are sent to the same target in a relatively
short period of time the second IPI event can become lost when
lv1_end_of_interrupt_ext() is called from ps3_chip_eoi().

Signed-off-by: Geoff Levand 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

xen:pvhvm: enable PVHVM VCPU placement when using more than 32 CPUs.

2011-11-21T22:35:25+00:00

commit 90d4f5534d14815bd94c10e8ceccc57287657ecc upstream.

PVHVM running with more than 32 vcpus and pv_irq/pv_time enabled
need VCPU placement to work, or else it will softlockup.

Acked-by: Stefano Stabellini 
Signed-off-by: Zhenzhong Duan 
Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Greg Kroah-Hartman

sh: Fix cached/uncaced address calculation in 29bit mode

2011-11-21T22:35:19+00:00

commit dfd3b596fbbfa48b8e7966ef996d587157554b69 upstream.

In the case of 29bit mode, CAC/UNCAC_ADDR does not return a right address.
This revises this problem by using P1SEGADDR and P2SEGADDR in 29bit mode.

Reported-by: Yutaro Ebihara 
Signed-off-by: Nobuhiro Iwamatsu 
Tested-by: Kuninori Morimoto 
Tested-by: Simon Horman 
Signed-off-by: Paul Mundt 
Signed-off-by: Greg Kroah-Hartman

ARM: at91: Fix USBA gadget registration

2011-11-21T22:35:18+00:00

commit dd0b3825495a2e7a8cd6cf0ec077618c008ac7c4 upstream.

Since 193ab2a6070039e7ee2b9b9bebea754a7c52fd1b, various AT91 boards don't
register USBA adapters anymore due to depending on a now non-existing
symbol. Fix the symbol name.

Signed-off-by: Jochen Friedrich 
Acked-by: Nicolas Ferre 
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD 
Signed-off-by: Greg Kroah-Hartman

powerpc: Fix deadlock in icswx code

2011-11-11T17:44:42+00:00

commit 8bdafa39a47265bc029838b35cc6585f69224afa upstream.

The icswx code introduced an A-B B-A deadlock:

     CPU0                    CPU1
     ----                    ----
lock(&anon_vma->mutex);
                             lock(&mm->mmap_sem);
                             lock(&anon_vma->mutex);
lock(&mm->mmap_sem);

Instead of using the mmap_sem to keep mm_users constant, take the
page table spinlock.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman

powerpc/eeh: Fix /proc/ppc64/eeh creation

2011-11-11T17:44:42+00:00

commit 8feaa43494cee5e938fd5a57b9e9bf1c827e6ccd upstream.

Since commit 188917e183cf9ad0374b571006d0fc6d48a7f447, /proc/ppc64 is a
symlink to /proc/powerpc/. That means that creating /proc/ppc64/eeh will
end up with a unaccessible file, that is not listed under /proc/powerpc/
and, then, not listed under /proc/ppc64/.

Creating /proc/powerpc/eeh fixes that problem and maintain the
compatibility intended with the ppc64 symlink.

Signed-off-by: Thadeu Lima de Souza Cascardo 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Greg Kroah-Hartman