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Will Deacon b5466f8728 ARM: mm: remove IPI broadcasting on ASID rollover 
ASIDs are allocated to MMU contexts based on a rolling counter. This
means that after 255 allocations we must invalidate all existing ASIDs
via an expensive IPI mechanism to synchronise all of the online CPUs and
ensure that all tasks execute with an ASID from the new generation.

This patch changes the rollover behaviour so that we rely instead on the
hardware broadcasting of the TLB invalidation to avoid the IPI calls.
This works by keeping track of the active ASID on each core, which is
then reserved in the case of a rollover so that currently scheduled
tasks can continue to run. For cores without hardware TLB broadcasting,
we keep track of pending flushes in a cpumask, so cores can flush their
local TLB before scheduling a new mm.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
 		2012-11-05 16:25:25 +00:00
..
boot arm-soc: fixes for v3.7-rc3 2012-10-28 11:12:38 -07:00
common ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
configs ARM: versatile: fix versatile_defconfig 2012-10-27 17:46:56 +02:00
crypto arm/crypto: Add optimized AES and SHA1 routines 2012-09-07 04:17:02 +08:00
include ARM: mm: remove IPI broadcasting on ASID rollover 2012-11-05 16:25:25 +00:00
kernel Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2012-10-25 15:59:34 -07:00
lib ARM: export default read_current_timer 2012-10-09 20:24:36 +02:00
mach-at91 ARM: at91: fix at91x40 build 2012-10-27 17:46:48 +02:00
mach-bcm2835 ARM: dtb: move all dtb targets to common Makefile 2012-09-20 22:58:17 -07:00
mach-clps711x ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-cns3xxx
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mach-davinci ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-dove ARM: dove: Add crypto engine to DT 2012-10-17 17:20:01 +00:00
mach-ebsa110 ARM: soc: driver specific changes 2012-10-01 18:46:13 -07:00
mach-ep93xx ARM: soc: multiplatform enablement 2012-10-01 19:11:38 -07:00
mach-exynos ARM: EXYNOS: Set .smp field of machine descriptor for exynos4-dt 2012-10-22 08:16:44 +09:00
mach-footbridge ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-gemini ARM: gemini: fix the gemini build 2012-09-04 22:17:34 -07:00
mach-h720x ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-highbank Merge branch 'for-v3.7' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping 2012-10-02 19:13:12 -07:00
mach-imx Revert "ARM i.MX25: Fix PWM per clock lookups" 2012-10-27 17:46:56 +02:00
mach-integrator ARM: integrator: use __iomem pointers for MMIO, part 2 2012-10-09 17:27:33 +02:00
mach-iop13xx Merge branch 'late/fixes' into fixes 2012-10-07 07:22:32 -07:00
mach-iop32x Merge branch 'cleanup/__iomem' into next/cleanup 2012-09-22 10:24:29 -07:00
mach-iop33x ARM: iop3xx: use fixed PCI i/o mapping 2012-07-26 09:10:04 -05:00
mach-ixp4xx ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-kirkwood ARM: Kirkwood: fix disabling CACHE_FEROCEON_L2 2012-10-18 17:04:24 +00:00
mach-ks8695 Merge branch 'late/fixes' into fixes 2012-10-07 07:22:32 -07:00
mach-l7200/include/mach
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mach-lpc32xx ARM: soc: multiplatform enablement 2012-10-01 19:11:38 -07:00
mach-mmp ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-msm ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-mv78xx0 Merge branch 'late/fixes' into fixes 2012-10-07 07:22:32 -07:00
mach-mvebu ARM: mvebu: fix build breaks from multi-platform conversion 2012-09-28 22:27:07 +02:00
mach-mxs ARM: soc: multiplatform enablement 2012-10-01 19:11:38 -07:00
mach-netx ARM: netx: move platform_data definitions 2012-09-14 11:17:36 +02:00
mach-nomadik ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-omap1 ASoC: Fixes for v3.7 2012-10-17 14:09:15 +02:00
mach-omap2 ARM: AM33XX: Fix configuration of dmtimer parent clock by dmtimer driverDate:Wed, 17 Oct 2012 13:55:55 -0500 2012-10-23 18:58:21 -07:00
mach-orion5x ARM: soc: late platform updates 2012-10-07 20:55:16 +09:00
mach-picoxcell ARM: initial multiplatform support 2012-09-14 09:22:06 -05:00
mach-prima2 pinctrl: sirf: remove sirfsoc_gpio_set_pull function 2012-10-15 09:09:27 +02:00
mach-pxa ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-realview ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-rpc ARM: rpc: check device_register return code in ecard_probe 2012-10-07 10:33:09 +02:00
mach-s3c24xx Merge branch 'v3.7-samsung-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes 2012-10-26 14:45:06 +02:00
mach-s3c64xx ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-s3c2410
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mach-s3c2412 ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-s3c2440 ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-s5p64x0 ARM: SAMSUNG: Add naming of s3c64xx-spi devices 2012-10-17 16:47:32 +09:00
mach-s5pc100 ARM: SAMSUNG: Add naming of s3c64xx-spi devices 2012-10-17 16:47:32 +09:00
mach-s5pv210 ARM: SAMSUNG: Add naming of s3c64xx-spi devices 2012-10-17 16:47:32 +09:00
mach-sa1100 ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-shark Merge branch 'late/fixes' into fixes 2012-10-07 07:22:32 -07:00
mach-shmobile ARM: shmobile: r8a7779: I/O address abuse cleanup 2012-10-19 15:39:38 +09:00
mach-socfpga ARM: initial multiplatform support 2012-09-14 09:22:06 -05:00
mach-spear3xx ARM: move all dtb targets out of Makefile.boot 2012-09-14 09:22:04 -05:00
mach-spear6xx ARM: move all dtb targets out of Makefile.boot 2012-09-14 09:22:04 -05:00
mach-spear13xx ARM: SPEAr: Remove unused empty files 2012-10-25 16:34:18 +02:00
mach-tegra ARM: tegra: add tegra_timer clock 2012-10-16 11:15:05 -06:00
mach-u300 ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-ux500 ARM: ux500: Fix build error relating to IRQCHIP_SKIP_SET_WAKE 2012-10-25 08:43:49 +01:00
mach-versatile ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
mach-vexpress Features: 2012-10-07 07:13:01 +09:00
mach-vt8500 arm: vt8500: Fix build warning in uncompress.h 2012-10-07 14:50:06 -07:00
mach-w90x900 ARM: w90x900: move platform_data definitions 2012-09-14 11:18:59 +02:00
mach-zynq
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mm ARM: mm: remove IPI broadcasting on ASID rollover 2012-11-05 16:25:25 +00:00
net
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nwfpe
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oprofile ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration 2012-07-09 17:41:10 +01:00
plat-iop Bunch of perf updates for the ARM backend that pave the way for 2012-09-04 22:12:41 -07:00
plat-mxc ARM i.MX fixes for 3.7-rc 2012-10-25 15:57:40 +02:00
plat-nomadik ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
plat-omap arm-soc: fixes for v3.7-rc3 2012-10-28 11:12:38 -07:00
plat-orion Merge branch 'samsung_platform_data' into staging/for_v3.7 2012-10-05 22:32:05 -03:00
plat-pxa ARM: pxa: move platform_data definitions 2012-09-14 11:18:10 +02:00
plat-s3c24xx ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
plat-samsung ARM: SAMSUNG: Add naming of s3c64xx-spi devices 2012-10-17 16:47:32 +09:00
plat-spear ARM: config: sort select statements alphanumerically 2012-10-13 17:11:28 +01:00
plat-versatile Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-10-07 21:20:57 +09:00
tools ARM: be really quiet when building with 'make -s' 2012-10-09 20:29:05 +02:00
vfp ARM: 7483/1: vfp: only advertise VFPv4 in hwcaps if CONFIG_VFPv3 is enabled 2012-08-11 09:15:57 +01:00
xen xen/arm: use the __HVC macro 2012-10-30 10:41:19 -04:00
Kconfig Merge tag 'fixes-for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc into fixes 2012-10-22 22:56:09 +01:00
Kconfig-nommu
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Kconfig.debug ARM: soc: multiplatform enablement 2012-10-01 19:11:38 -07:00
Makefile ARM: pass -marm to gcc by default for both C and assembler 2012-10-09 20:29:05 +02:00