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author | Anup Patel <anup.patel@wdc.com> | 2020-09-27 11:09:16 +0530 |
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committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-09-30 11:05:14 -0700 |
commit | aa9887608e77b835d51f05a54940380391cd4e21 (patch) | |
tree | 82f0d59e8e554944c3941d2197f58789e1e71c8c /arch/riscv/Makefile | |
parent | c14decfca23cfbeb423ad8be3961a58a31a5473c (diff) | |
download | linux-stable-aa9887608e77b835d51f05a54940380391cd4e21.tar.gz linux-stable-aa9887608e77b835d51f05a54940380391cd4e21.tar.bz2 linux-stable-aa9887608e77b835d51f05a54940380391cd4e21.zip |
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: d5be89a8d118 ("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>
Diffstat (limited to 'arch/riscv/Makefile')
0 files changed, 0 insertions, 0 deletions