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b74d2807ae
linux/arch/powerpc/platforms/powernv
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Nicholas Piggin b74d2807ae powerpc/powernv: Remove OPALv1 support from opal console driver 
opal_put_chars deals with partial writes because in OPALv1,
opal_console_write_buffer_space did not work correctly. That firmware
is not supported.

This reworks the opal_put_chars code to no longer deal with partial
writes by turning them into full writes. Partial write handling is still
supported in terms of what gets returned to the caller, but it may not
go to the console atomically. A warning message is printed in this
case.

This allows console flushing to be moved out of the opal_write_lock
spinlock. That could cause the lock to be held for long periods if the
console is busy (especially if it was being spammed by firmware),
which is dangerous because the lock is taken by xmon to debug the
system. Flushing outside the lock improves the situation a bit.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-07-24 22:09:56 +10:00
..
copy-paste.h powerpc/powernv: copy/paste - Mask SO bit in CR 2018-06-04 22:58:41 +10:00
eeh-powernv.c powerpc/eeh: Avoid misleading message "EEH: no capable adapters found" 2018-07-02 23:54:26 +10:00
idle.c powerpc/64s: Remove POWER9 DD1 support 2018-07-16 11:37:21 +10:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile powerpc/powernv: Move TCE manupulation code to its own file 2018-07-16 22:53:07 +10:00
memtrace.c powerpc/powernv/memtrace: Remove memtrace mmap() 2018-07-02 23:54:29 +10:00
npu-dma.c powerpc/powernv/npu: Add a debugfs setting to change ATSD threshold 2018-07-19 21:58:10 +10:00
ocxl.c ocxl: Rename pnv_ocxl_spa_remove_pe to clarify it's action 2018-06-03 20:40:32 +10:00
opal-async.c powerpc/opal: Add opal_async_wait_response_interruptible() to opal-async 2017-11-06 20:39:28 +11:00
opal-dump.c powerpc/powernv/opal-dump : Use IRQ_HANDLED instead of numbers in interrupt handler 2018-07-24 22:03:24 +10:00
opal-elog.c powerpc: Use octal numbers for file permissions 2018-01-22 05:48:33 +11:00
opal-flash.c powerpc/powernv: Always stop secondaries before reboot/shutdown 2018-04-03 22:59:57 +10:00
opal-hmi.c powerpc-opal: fix spelling mistake "Uniterrupted" -> "Uninterrupted" 2018-06-05 11:33:47 +10:00
opal-imc.c powerpc/perf: Unregister thread-imc if core-imc not supported 2018-06-03 20:43:37 +10:00
opal-irqchip.c powerpc/powernv: process all OPAL event interrupts with kopald 2018-06-03 20:40:30 +10:00
opal-kmsg.c powerpc/powernv: Implement and use opal_flush_console 2018-07-24 22:09:56 +10:00
opal-lpc.c powerpc: Create asm/debugfs.h and move powerpc_debugfs_root there 2017-04-11 07:46:03 +10:00
opal-memory-errors.c powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
opal-msglog.c locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE() 2017-10-25 11:01:08 +02:00
opal-nvram.c powerpc/powernv: Fix NVRAM sleep in invalid context when crashing 2018-05-18 00:23:07 +10:00
opal-power.c powerpc/powernv: Add poweroff (EPOW, DPO) events support for PowerNV platform 2015-07-16 13:34:36 +10:00
opal-powercap.c powerpc/powernv: Add support for powercap framework 2017-08-10 22:39:53 +10:00
opal-prd.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
opal-psr.c powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
opal-rtc.c powerpc: use time64_t in read_persistent_clock 2018-06-03 20:43:33 +10:00
opal-sensor-groups.c powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
opal-sensor.c powernv: opal-sensor: Add support to read 64bit sensor values 2018-05-21 14:48:02 +10:00
opal-sysparam.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
opal-tracepoints.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
opal-wrappers.S powerpc/powernv: call OPAL_QUIESCE before OPAL_SIGNAL_SYSTEM_RESET 2018-06-03 20:40:30 +10:00
opal-xscom.c powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
opal.c powerpc/powernv: Remove OPALv1 support from opal console driver 2018-07-24 22:09:56 +10:00
pci-cxl.c Revert "powerpc/powernv: Add support for the cxl kernel api on the real phb" 2018-07-02 23:54:32 +10:00
pci-ioda-tce.c powerpc/powernv/ioda: Allocate indirect TCE levels on demand 2018-07-16 22:53:11 +10:00
pci-ioda.c Merge branch 'topic/ppc-kvm' into next 2018-07-19 14:37:57 +10:00
pci.c powerpc/powernv: Move TCE manupulation code to its own file 2018-07-16 22:53:07 +10:00
pci.h Merge branch 'topic/ppc-kvm' into next 2018-07-19 14:37:57 +10:00
powernv.h powerpc/powernv: process all OPAL event interrupts with kopald 2018-06-03 20:40:30 +10:00
rng.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
setup.c powerpc updates for 4.18 2018-06-07 10:23:33 -07:00
smp.c powerpc/64s: Remove POWER9 DD1 support 2018-07-16 11:37:21 +10:00
subcore-asm.S
subcore.c powerpc/64: Use array of paca pointers and allocate pacas individually 2018-03-30 23:34:23 +11:00
subcore.h
vas-debug.c powerpc/vas: Fix cleanup when VAS is not configured 2018-03-14 20:11:37 +11:00
vas-trace.h powerpc/vas: Add a couple of trace points 2018-03-14 20:13:58 +11:00
vas-window.c powerpc/vas: Add a couple of trace points 2018-03-14 20:13:58 +11:00
vas.c powerpc/vas: Fix cleanup when VAS is not configured 2018-03-14 20:11:37 +11:00
vas.h powerpc/vas: Define vas_win_id() 2017-11-12 09:03:10 +11:00