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c8bf38055e
linux/arch/mips
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Heiher c8bf38055e
MIPS: Fix ejtag handler on SMP 
On SMP systems, the shared ejtag debug buffer may be overwritten by
other cores, because every cores can generate ejtag exception at
same time.

Unfortunately, in that context, it's difficult to relax more registers
to access per cpu buffers. so use ll/sc to serialize the access.

[paul.burton@mips.com:
  This could in theory be backported at least as far back as the
  beginning of the git era, however in general it's exceedingly rare
  that anyone would hit this without further changes, so it doesn't seem
  worthwhile marking for backport.]

Signed-off-by: Heiher <r@hev.cc>
Patchwork: https://patchwork.linux-mips.org/patch/19507/
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: jhogan@kernel.org
Cc: ralf@linux-mips.org
2018-06-24 09:27:27 -07:00
..
alchemy Merge branch 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2018-06-14 16:21:46 +09:00
ar7 MIPS: AR7: Constify gpio_led 2018-02-19 10:55:36 +00:00
ath25 MIPS: ath25: use generic dma noncoherent ops 2018-06-24 09:27:27 -07:00
ath79 MIPS: pb44: Fix i2c-gpio GPIO descriptor table 2018-06-18 22:19:50 +01:00
bcm47xx MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe erratum 2018-06-18 22:19:50 +01:00
bcm63xx MIPS: BCM63XX: kconfig: Remove blank help text 2018-02-02 23:53:10 +09:00
bmips MIPS: bmips: use generic dma noncoherent ops 2018-06-24 09:27:27 -07:00
boot MIPS: boot: merge build rules of vmlinux.*.itb by using pattern rule 2018-06-24 09:27:27 -07:00
cavium-octeon MIPS: Octeon: assign bool true/false not 1/0 2018-06-24 09:27:27 -07:00
cobalt
configs MIPS changes for 4.18 2018-06-12 12:56:02 -07:00
crypto MIPS: crypto: Add crc32 and crc32c hw accelerated module 2018-02-19 20:50:36 +00:00
dec MIPS: Convert update_persistent_clock() to update_persistent_clock64() 2018-05-14 23:58:23 +01:00
emma MIPS: Avoid old-style declaration 2017-01-25 02:51:11 +01:00
fw License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
generic MIPS: xilfpga: Actually include FDT in fitImage 2018-05-14 23:54:25 +01:00
include MIPS: remove unneeded includes from dma-mapping.h 2018-06-24 09:27:27 -07:00
jazz MIPS: jazz: split dma mapping operations from dma-default 2018-06-24 09:27:27 -07:00
jz4740 MIPS: JZ4740: Drop old platform reset code 2018-05-14 23:58:23 +01:00
kernel MIPS: Fix ejtag handler on SMP 2018-06-24 09:27:27 -07:00
kvm Small update for KVM. 2018-06-12 11:34:04 -07:00
lantiq MIPS: lantiq: ase: Enable MFD_SYSCON 2018-03-21 21:57:35 +00:00
lasat MIPS: Convert update_persistent_clock() to update_persistent_clock64() 2018-05-14 23:58:23 +01:00
lib MIPS: memset.S: Reinstate delay slot indentation 2018-05-21 16:01:15 +01:00
loongson32 MIPS: use generic dma noncoherent ops for simple noncoherent platforms 2018-06-24 09:26:05 -07:00
loongson64 MIPS: loongson64: use generic dma noncoherent ops 2018-06-24 09:27:27 -07:00
math-emu MIPS: math-emu: Mark fall throughs in switch statements with a comment 2017-12-12 17:20:20 +01:00
mm MIPS: remove the old dma-default implementation 2018-06-24 09:27:27 -07:00
mti-malta MIPS: remove unneeded includes from dma-mapping.h 2018-06-24 09:27:27 -07:00
net bpf, mips: remove unused function 2018-05-14 19:11:45 -07:00
netlogic scatterlist: move the NEED_SG_DMA_LENGTH config symbol to lib/Kconfig 2018-05-09 06:55:59 +02:00
oprofile MIPS: perf: More robustly probe for the presence of per-tc counters 2018-05-15 15:16:16 +01:00
paravirt License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci MIPS: ath25: use generic dma noncoherent ops 2018-06-24 09:27:27 -07:00
pic32 MIPS: use generic dma noncoherent ops for simple noncoherent platforms 2018-06-24 09:26:05 -07:00
pistachio License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pmcs-msp71xx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pnx833x mtd: nand: Rename nand.h into rawnand.h 2017-08-13 10:11:49 +02:00
power License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ralink MIPS: ralink: Fix booting on MT7621 2018-03-22 00:06:30 +00:00
rb532 MIPS: RB532: Avoid undefined mac_pton without GENERIC_NET_UTILS 2018-01-10 16:39:03 +01:00
sgi-ip22 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-11-13 17:56:58 -08:00
sgi-ip27 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sgi-ip32 MIPS: IP32: use generic dma noncoherent ops 2018-06-24 09:27:27 -07:00
sibyte MIPS: remove CONFIG_DMA_COHERENT 2018-06-24 09:26:02 -07:00
sni MIPS: sni: Remove the read_persistent_clock() 2018-05-14 23:58:25 +01:00
tools Update MIPS email addresses 2017-11-03 09:02:30 -07:00
txx9 MIPS: use generic dma noncoherent ops for simple noncoherent platforms 2018-06-24 09:26:05 -07:00
vdso MIPS: VDSO: Replace __mips_isa_rev with MIPS_ISA_REV 2018-03-09 11:22:48 +00:00
vr41xx MIPS: use generic dma noncoherent ops for simple noncoherent platforms 2018-06-24 09:26:05 -07:00
Kbuild MIPS: Disable Werror when W= is set 2017-04-10 11:56:07 +02:00
Kbuild.platforms MIPS: Xilfpga: Switch to using generic defconfigs 2017-11-08 22:54:14 +00:00
Kconfig MIPS: remove the old dma-default implementation 2018-06-24 09:27:27 -07:00
Kconfig.debug MIPS: Fix CPS SMP NS16550 UART defaults 2018-01-10 16:44:49 +01:00
Makefile kbuild: add machine size to CHECKFLAGS 2018-06-01 11:36:58 +09:00
Makefile.postlink License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00