litmus-rt.git/arch/mips, branch master

MIPS: Fix KVM guest fixmap address

2015-07-10T16:49:36+00:00

commit 8e748c8d09a9314eedb5c6367d9acfaacddcdc88 upstream.

KVM guest kernels for trap & emulate run in user mode, with a modified
set of kernel memory segments. However the fixmap address is still in
the normal KSeg3 region at 0xfffe0000 regardless, causing problems when
cache alias handling makes use of them when handling copy on write.

Therefore define FIXADDR_TOP as 0x7ffe0000 in the guest kernel mapped
region when CONFIG_KVM_GUEST is defined.

Signed-off-by: James Hogan 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9887/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

KVM: mips: use id_to_memslot correctly

2015-07-10T16:49:36+00:00

commit 69a1220060c1523fd0515216eaa29e22f133b894 upstream.

The argument to KVM_GET_DIRTY_LOG is a memslot id; it may not match the
position in the memslots array, which is sorted by gfn.

Reviewed-by: James Hogan 
Signed-off-by: Paolo Bonzini 
Signed-off-by: Greg Kroah-Hartman

MIPS: MSA: bugfix - disable MSA correctly for new threads/processes.

2015-06-10T09:24:53+00:00

Due to the slightly odd way that new threads and processes start execution
when scheduled for the very first time they were bypassing the required
disable_msa call.

Signed-off-by: Ralf Baechle

MIPS: Loongson: Do not register 8250 platform device from module.

2015-06-10T08:43:07+00:00

If CONFIG_SERIAL_8250 is set to m, the Loongson seria.ko module might get
unloaded while the serial driver modules are still loaded resulting in
stale references to the destroyed platform_device instance.

Anyway, platform devices should always be registered indicated what
devices are present, _not_ what drivers have been configured.

Signed-off-by: Ralf Baechle 
Reported-by: Paul Gortmaker 
Patchwork: https://patchwork.linux-mips.org/patch/10538/

MIPS: Cobalt: Do not build MTD platform device registration code as module.

2015-06-10T08:39:30+00:00

If CONFIG_MTD_PHYSMAP is set to m, the Cobalt mtd.ko module might get
unloaded while the drivers/mtd modules are still loaded resulting in
stale references to the destroyed platform_device instance.

Anyway, platform devices should always be registered indicated what
devices are present, _not_ what drivers have been configured.

Signed-off-by: Ralf Baechle

MIPS: pgtable-bits: Fix XPA damage to R6 definitions.

2015-06-09T08:45:05+00:00

Commit be0c37c985ed ("MIPS: Rearrange PTE bits into fixed positions.")
rearranged the PTE bits into fixed positions in preparation for the XPA
support. However, this patch broke R6 since it only took R2 cores
into consideration for the RI/XI bits leading to boot failures. We fix
this by adding the missing CONFIG_CPU_MIPSR6 definitions

Fixes: be0c37c985ed ("MIPS: Rearrange PTE bits into fixed positions.")
Cc: Steven J. Hill 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10208/
Signed-off-by: Markos Chandras 
Signed-off-by: Ralf Baechle

MIPS: KVM: Do not sign extend on unsigned MMIO load

2015-06-06T08:21:10+00:00

Fix possible unintended sign extension in unsigned MMIO loads by casting
to uint16_t in the case of mmio_needed != 2.

Signed-off-by: Nicholas Mc Guire 
Reviewed-by: James Hogan 
Tested-by: James Hogan 
Cc: Gleb Natapov 
Cc: Paolo Bonzini 
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9985/
Signed-off-by: Ralf Baechle

MIPS: BPF: Fix stack pointer allocation

2015-06-06T08:21:10+00:00

Fix stack pointer offset which could potentially corrupt
argument registers in the previous frame. The calculated offset
reflects the size of all the registers we need to preserve so there
is no need for this erroneous subtraction.

[ralf@linux-mips.org: Fixed conflict due to only applying this fix part
of the entire series as part of 4.1 fixes.]

Signed-off-by: Markos Chandras 
Cc: netdev@vger.kernel.org
Cc: "David S. Miller" 
Cc: Alexei Starovoitov 
Cc: Daniel Borkmann 
Cc: Hannes Frederic Sowa 
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/10527/
Signed-off-by: Ralf Baechle

MIPS: Loongson-3: Fix a cpu-hotplug issue in loongson3_ipi_interrupt()

2015-06-06T08:21:10+00:00

setup_per_cpu_areas() only setup __per_cpu_offset[] for each possible
cpu, but loongson_sysconf.nr_cpus can be greater than possible cpus
(due to reserved_cpus_mask). So in loongson3_ipi_interrupt(), percpu
access will touch the original varible in .data..percpu section which
has been freed. Without this patch, cpu-hotplug will cause memery
corruption.

Signed-off-by: Huacai Chen 
Cc: John Crispin 
Cc: Steven J. Hill 
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang 
Cc: Zhangjin Wu 
Patchwork: http://patchwork.linux-mips.org/patch/10524/
Signed-off-by: Ralf Baechle

MIPS: Fix enabling of DEBUG_STACKOVERFLOW

2015-06-06T08:21:09+00:00

Commit 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection") added
kernel stack overflow detection, however it only enabled it conditional
upon the preprocessor definition DEBUG_STACKOVERFLOW, which is never
actually defined. The Kconfig option is called DEBUG_STACKOVERFLOW,
which manifests to the preprocessor as CONFIG_DEBUG_STACKOVERFLOW, so
switch it to using that definition instead.

Fixes: 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection")
Signed-off-by: James Hogan 
Cc: Ralf Baechle 
Cc: Adam Jiang 
Cc: linux-mips@linux-mips.org
Cc:  # 2.6.37+
Patchwork: http://patchwork.linux-mips.org/patch/10531/
Signed-off-by: Ralf Baechle