OpenCloudOS-Kernel/arch
Matt Redfearn 7688c53910 MIPS: smp.c: Introduce mechanism for freeing and allocating IPIs
For the MIPS remote processor implementation, we need additional IPIs to
talk to the remote processor. Since MIPS GIC reserves exactly the right
number of IPI IRQs required by Linux for the number of VPs in the
system, this is not possible without releasing some recources.

This commit introduces mips_smp_ipi_allocate() which allocates IPIs to a
given cpumask. It is called as normal with the cpu_possible_mask at
bootup to initialise IPIs to all CPUs. mips_smp_ipi_free() may then be
used to free IPIs to a subset of those CPUs so that their hardware
resources can be reused.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Lisa Parratt <Lisa.Parratt@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Qais Yousef <qsyousef@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-remoteproc@vger.kernel.org
Cc: lisa.parratt@imgtec.com
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14285/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-05 01:31:20 +02:00
..
alpha alpha: fix copy_from_user() 2016-09-09 19:34:32 -04:00
arc Merge branch 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-09-14 09:35:05 -07:00
arm Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm 2016-10-02 15:23:00 -07:00
arm64 - Fix secondary CPU to NUMA node assignment 2016-09-23 11:24:42 -07:00
avr32 avr32: fix 'undefined reference to `___copy_from_user' 2016-09-18 07:26:26 -07:00
blackfin Merge branch 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-09-14 09:35:05 -07:00
c6x dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
cris cris: buggered copy_from_user/copy_to_user/clear_user 2016-09-13 17:49:38 -04:00
frv frv: fix clear_user() 2016-09-13 17:49:39 -04:00
h8300 h8300: Add missing include file to asm/io.h 2016-08-13 08:53:56 -07:00
hexagon hexagon: fix strncpy_from_user() error return 2016-09-13 17:49:39 -04:00
ia64 Merge branch 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-09-14 09:35:05 -07:00
m32r m32r: fix __get_user() 2016-09-13 17:50:16 -04:00
m68k m68knommu: fix user a5 register being overwritten 2016-08-08 12:38:47 +10:00
metag metag: copy_from_user() should zero the destination on access_ok() failure 2016-09-13 17:49:40 -04:00
microblaze microblaze: fix __get_user() 2016-09-13 17:50:17 -04:00
mips MIPS: smp.c: Introduce mechanism for freeing and allocating IPIs 2016-10-05 01:31:20 +02:00
mn10300 mn10300: copy_from_user() should zero on access_ok() failure... 2016-09-13 17:49:42 -04:00
nios2 nios2: fix __get_user() 2016-09-13 17:49:43 -04:00
openrisc openrisc: fix the fix of copy_from_user() 2016-09-18 07:26:42 -07:00
parisc Merge branch 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-09-14 09:35:05 -07:00
powerpc powerpc fixes for 4.8 #7 2016-09-25 13:52:59 -07:00
s390 Merge branch 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-09-14 09:35:05 -07:00
score score: fix copy_from_user() and friends 2016-09-13 17:50:14 -04:00
sh locking/atomic, arch/sh: Fix ATOMIC_FETCH_OP() 2016-09-22 14:47:02 +02:00
sparc sparc64: Fix non-SMP build. 2016-09-28 20:40:52 -04:00
tile mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS 2016-08-30 10:10:21 -07:00
um um/ptrace: Fix the syscall number update after a ptrace 2016-09-07 09:25:04 -07:00
unicore32 unicore32: mm: Add missing parameter to arch_vma_access_permitted 2016-08-13 08:53:18 -07:00
x86 x86/entry/64: Fix context tracking state warning when load_gs_index fails 2016-09-30 13:53:12 +02:00
xtensa dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
.gitignore
Kconfig seccomp: Remove 2-phase API documentation 2016-09-07 09:25:05 -07:00