git bisect good
cfafe260137418d0265d0df3bb18dc494af2b43e is the first bad commit
commit cfafe260137418d0265d0df3bb18dc494af2b43e
Author: Atish Patra <atish.pa...@wdc.com>
Date: Tue Mar 17 18:11:43 2020 -0700
RISC-V: Add supported for ordered booting method using HSM
Currently, all harts have to jump Linux in RISC-V. This complicates the
multi-stage boot process as every transient stage also has to ensure all
harts enter to that stage and jump to Linux afterwards. It also obstructs
a clean Kexec implementation.
SBI HSM extension provides alternate solutions where only a single hart
need to boot and enter Linux. The booting hart can bring up secondary
harts one by one afterwards.
Add SBI HSM based cpu_ops that implements an ordered booting method in
RISC-V. This change is also backward compatible with older firmware not
implementing HSM extension. If a latest kernel is used with older
firmware, it will continue to use the default spinning booting method.
Signed-off-by: Atish Patra <atish.pa...@wdc.com>
Reviewed-by: Anup Patel <a...@brainfault.org>
Signed-off-by: Palmer Dabbelt <palmerdabb...@google.com>
arch/riscv/kernel/Makefile | 3 ++
arch/riscv/kernel/cpu_ops.c | 10 ++++-
arch/riscv/kernel/cpu_ops_sbi.c | 81 +++++++++++++++++++++++++++++++++++++++++
arch/riscv/kernel/head.S | 26 +++++++++++++
arch/riscv/kernel/smpboot.c | 2 +-
arch/riscv/kernel/traps.c | 2 +-
6 files changed, 121 insertions(+), 3 deletions(-)
create mode 100644 arch/riscv/kernel/cpu_ops_sbi.c
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1894613
Title:
risc-v 5.8 kernel oops on ftrace tests
Status in ubuntu-kernel-tests:
New
Status in linux package in Ubuntu:
In Progress
Bug description:
5.8.0-1-generic (buildd@riscv64-qemu-lcy01-015) (gcc (Ubuntu
10.2.0-5ubuntu2) 10.2.0, GNU ld (GNU Binutils for Ubuntu) 2.35)
#1-Ubuntu SMP Thu Aug 27 19:51:38 UTC 2020 (Ubuntu 5.8.0-1.1-generic
5.8.4
18:30:06 DEBUG| [stdout] # selftests: ftrace: ftracetest^M^M
18:30:07 DEBUG| [stdout] # === Ftrace unit tests ===^M^M
18:30:10 DEBUG| [stdout] # [1] Basic trace file check [PASS]^M^M
[17433.113458] Unable to handle kernel NULL pointer dereference at virtual
address 0000000000000000^M^M
[17433.113533] Unable to handle kernel NULL pointer dereference at virtual
address 0000000000000000^M^M
[17433.113552] Unable to handle kernel NULL pointer dereference at virtual
address 0000000000000000^M^M
[17433.113573] Unable to handle kernel NULL pointer dereference at virtual
address 0000000000000000^M^M
[17433.113591] Unable to handle kernel NULL pointer dereference at virtual
address 0000000000000000^M^M
[17433.114290] Unable to handle kernel NULL pointer dereference at virtual
address 0000000000000000^M^M
[17433.114306] Unable to handle kernel NULL pointer dereference at virtual
address 0000000000000000^M^M
[17433.114315] Oops [#1]^M^M
[17433.114630] Unable to handle kernel NULL pointer dereference at virtual
address 0000000000000000^M^M
[17433.114690] Modules linked in: virtio_rng binfmt_misc uio_pdrv_genirq uio
drm sch_fq_codel drm_panel_orientation_quirks backlight ip_tables x_tables
autofs4 virtio_net net_failover virtio_blk failover [last unloaded:
signpost]^M^M
[17433.115296] CPU: 1 PID: 15 Comm: migration/1 Tainted: G W OE
5.8.0-1-generic #1-Ubuntu^M^M
[17433.115419] epc: 0000000000000000 ra : 0000000000000000 sp :
ffffffe1f5c67d90^M^M
[17433.115442] gp : ffffffe001722298 tp : ffffffe1f5c3ae00 t0 :
0000000000000000^M^M
[17433.115459] t1 : 0000000000006000 t2 : 00000000000bbc00 s0 :
0000000000000022^M^M
[17433.115475] s1 : ffffffe0002b7c12 a0 : ffffffe000963a64 a1 :
0000000000000022^M^M
[17433.115491] a2 : 0000000000000000 a3 : 0000000000000000 a4 :
0000000000000000^M^M
[17433.115507] a5 : ffffffe1fec95580 a6 : 00000000000000ff a7 :
0000000000000001^M^M
[17433.115523] s2 : 0000000000000001 s3 : ffffffe00009d580 s4 :
ffffffe001724210^M^M
[17433.115540] s5 : ffffffe1fec9a3b8 s6 : ffffffffffffffff s7 :
0000000000000001^M^M
[17433.115556] s8 : ffffffe0016f07cb s9 : ffffffe1e909bb80 s10:
ffffffe0002b7ba6^M^M
[17433.115573] s11: ffffffe1e909bba8 t3 : 000000000000006c t4 :
00000000002c73ba^M^M
[17433.115586] t5 : 00000000001f7fa8 t6 : ffffffe000c02d1c^M^M
[17433.115603] status: 0000000000000120 badaddr: 0000000000000000 cause:
000000000000000c^M^M
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