Nick Kossifidis decf89f86e riscv: try to allocate crashkern region from 32bit addressible memory ... When allocating crash kernel region without explicitly specifying its base address/size, memblock_phys_alloc_range will attempt to allocate memory top to bottom (memblock.bottom_up is false), so the crash kernel region will end up in highmem on 64bit systems. This way swiotlb can't work on the crash kernel, since there won't be any 32bit addressible memory available for the bounce buffers. Try to allocate 32bit addressible memory if available, for the crash kernel by restricting the top search address to be less than SZ_4G. If that fails fallback to the previous behavior. I tested this on HiFive Unmatched where the pci-e controller needs swiotlb to work, with this patch it's possible to access the pci-e controller on crash kernel and mount the rootfs from the nvme. Signed-off-by: Nick Kossifidis <mick@ics.forth.gr> Fixes: e53d28180d ("RISC-V: Add kdump support") Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2022-01-09 10:40:14 -08:00
..
boot	riscv: dts: sifive: fu540-c000: Fix PLIC node	2022-01-09 10:11:44 -08:00
configs	RISC-V: defconfigs: Remove redundant K210 DT source	2022-01-06 09:41:03 -08:00
errata	riscv: skip errata_cip_453.o if CONFIG_ERRATA_SIFIVE_CIP_453 is disabled	2021-06-01 21:16:41 -07:00
include	riscv/mm: Enable THP migration	2022-01-07 15:54:28 -08:00
kernel	riscv: use hart id instead of cpu id on machine_kexec	2022-01-09 10:40:00 -08:00
kvm	RISC-V: KVM: fix boolreturn.cocci warnings	2021-11-01 17:35:17 +05:30
lib	riscv: extable: consolidate definitions	2022-01-05 17:52:47 -08:00
mm	riscv: try to allocate crashkern region from 32bit addressible memory	2022-01-09 10:40:14 -08:00
net	riscv: extable: add type and data fields	2022-01-05 17:52:54 -08:00
Kbuild	kbuild: use more subdir- for visiting subdirectories while cleaning	2021-10-24 13:49:46 +09:00
Kconfig	riscv/mm: Enable THP migration	2022-01-07 15:54:28 -08:00
Kconfig.debug
Kconfig.erratas	riscv: enable SiFive errata CIP-453 and CIP-1200 Kconfig only if CONFIG_64BIT=y	2021-05-06 09:40:13 -07:00
Kconfig.socs	riscv: sifive: fix Kconfig errata warning	2021-06-12 17:20:50 -07:00
Makefile	RISC-V Patches for the 5.16 Merge Window, Part 1	2021-11-13 09:15:42 -08:00