linux/arch/riscv
Anup Patel aa9887608e
RISC-V: Check clint_time_val before use
The NoMMU kernel is broken for QEMU virt machine from Linux-5.9-rc6
because clint_time_val is used even before CLINT driver is probed
at following places:
1. rand_initialize() calls get_cycles() which in-turn uses
   clint_time_val
2. boot_init_stack_canary() calls get_cycles() which in-turn
   uses clint_time_val

The issue#1 (above) is fixed by providing custom random_get_entropy()
for RISC-V NoMMU kernel. For issue#2 (above), we remove dependency of
boot_init_stack_canary() on get_cycles() and this is aligned with the
boot_init_stack_canary() implementations of ARM, ARM64 and MIPS kernel.

Fixes: d5be89a8d1 ("RISC-V: Resurrect the MMIO timer implementation for M-mode systems")
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-09-30 11:05:14 -07:00
..
boot riscv: Fix Kendryte K210 device tree 2020-09-19 13:20:14 -07:00
configs riscv: Add SiFive drivers to rv32_defconfig 2020-08-20 11:00:21 -07:00
include RISC-V: Check clint_time_val before use 2020-09-30 11:05:14 -07:00
kernel RISC-V Fixes for 5.9-rc6 (or shortly after) 2020-09-20 10:51:11 -07:00
lib RISC-V Patches for the 5.7 Merge Window, Part 1 2020-04-09 10:51:30 -07:00
mm riscv: Add sfence.vma after early page table changes 2020-09-19 13:20:13 -07:00
net treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
Kbuild riscv: Allow device trees to be built into the kernel 2020-05-18 11:38:05 -07:00
Kconfig RISC-V: Resurrect the MMIO timer implementation for M-mode systems 2020-09-19 13:21:11 -07:00
Kconfig.debug RISC-V: Remove EARLY_PRINTK support 2018-12-17 10:23:46 -08:00
Kconfig.socs RISC-V: Remove CLINT related code from timer and arch 2020-08-20 10:58:13 -07:00
Makefile RISC-V Patches for the 5.7 Merge Window, Part 1 2020-04-09 10:51:30 -07:00