Guenter Roeck 546c04c857 xtensa: xtfpga: Try software restart before simulating CPU reset ... [ Upstream commit 012e974501a270d8dfd4ee2039e1fdf7579c907e ] Rebooting xtensa images loaded with the '-kernel' option in qemu does not work. When executing a reboot command, the qemu session either hangs or experiences an endless sequence of error messages. Kernel panic - not syncing: Unrecoverable error in exception handler Reset code jumps to the CPU restart address, but Linux can not recover from there because code and data in the kernel init sections have been discarded and overwritten at this point. XTFPGA platforms have a means to reset the CPU by writing 0xdead into a specific FPGA IO address. When used in QEMU the kernel image loaded with the '-kernel' option gets restored to its original state allowing the machine to boot successfully. Use that mechanism to attempt a platform reset. If it does not work, fall back to the existing mechanism. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-10-27 09:56:47 +02:00
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boot	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
configs	xtensa: reorganize vectors placement	2020-02-04 21:57:02 -08:00
include	xtensa: use CONFIG_USE_OF instead of CONFIG_OF	2021-10-13 10:04:26 +02:00
kernel	xtensa: call irqchip_init only when CONFIG_USE_OF is selected	2021-10-13 10:04:26 +02:00
lib	xtensa: propagate the calling conventions change down into csum_partial_copy_generic()	2020-08-20 15:45:21 -04:00
mm	xtensa: use CONFIG_USE_OF instead of CONFIG_OF	2021-10-13 10:04:26 +02:00
oprofile
platforms	xtensa: xtfpga: Try software restart before simulating CPU reset	2021-10-27 09:56:47 +02:00
variants
Kconfig	xtensa: fix kconfig unmet dependency warning for HAVE_FUTEX_CMPXCHG	2021-09-08 08:49:00 +02:00
Kconfig.debug
Makefile