[PATCH V9 20/20] riscv: compat: Add COMPAT Kbuild skeletal support

Mon May 23 15:40:06 PDT 2022

Hi Guenter,

Am Montag, 23. Mai 2022, 18:18:47 CEST schrieb Guenter Roeck:
> On 5/23/22 08:18, Guo Ren wrote:
> > I tested Palmer's branch, it's okay:
> > 8810d7feee5a (HEAD -> for-next, palmer/for-next) riscv: Don't output a
> > bogus mmu-type on a no MMU kernel
> > 
> > I also tested linux-next, it's okay:
> > 
> > rv64_rootfs:
> > # uname -a
> > Linux buildroot 5.18.0-next-20220523 #7 SMP Mon May 23 11:15:17 EDT
> > 2022 riscv64 GNU/Linux
> > #
> 
> That is is ok with one setup doesn't mean it is ok with
> all setups. It is not ok with my root file system (from
> https://github.com/groeck/linux-build-test/tree/master/rootfs/riscv64),
> with qemu v6.2.

That is very true that it shouldn't fail on any existing (qemu-)platform,
but as I remember also testing Guo's series on both riscv32 and riscv64
qemu platforms in the past, I guess it would be really helpful to get more
information about the failing platform you're experiencing so that we can
find the source of the issue.

As it looks like you both tested the same kernel source, I guess the only
differences could be in the qemu-version, kernel config and rootfs.
Is your rootfs something you can share or that can be rebuilt easily?

Heiko

> > #
> > #
> > # ls /lib
> > ld-uClibc-1.0.39.so  libatomic.so.1       libgcc_s.so
> > ld-uClibc.so.0       libatomic.so.1.2.0   libgcc_s.so.1
> > ld-uClibc.so.1       libc.so.0            libuClibc-1.0.39.so
> > libatomic.so         libc.so.1            modules
> > 
> 
> My root file system uses musl.
> 
> Guenter
> 
> > rv32_rootfs:
> > buildroot login: root
> > # uname -a
> > Linux buildroot 5.18.0-next-20220523 #7 SMP Mon May 23 11:15:17 EDT
> > 2022 riscv64 GNU/Linux
> > # ls /lib
> > ld-linux-riscv32-ilp32d.so.1  libm.so.6
> > libanl.so.1                   libnss_dns.so.2
> > libatomic.so                  libnss_files.so.2
> > libatomic.so.1                libpthread.so.0
> > libatomic.so.1.2.0            libresolv.so.2
> > libc.so.6                     librt.so.1
> > libcrypt.so.1                 libthread_db.so.1
> > libdl.so.2                    libutil.so.1
> > libgcc_s.so                   modules
> > libgcc_s.so.1
> > 
> > Here is my qemu version:
> > commit 19f13a92cef8405052e0f73d5289f9e15474dad3 (HEAD ->
> > riscv-to-apply.next, alistair/riscv-to-apply.next)
> > Author: Tsukasa OI <research_trasio at irq.a4lg.com>
> > Date:   Sun May 15 11:56:11 2022 +0900
> > 
> >      target/riscv: Move/refactor ISA extension checks
> > 
> >      We should separate "check" and "configure" steps as possible.
> >      This commit separates both steps except vector/Zfinx-related checks.
> > 
> >      Signed-off-by: Tsukasa OI <research_trasio at irq.a4lg.com>
> >      Reviewed-by: Alistair Francis <alistair.francis at wdc.com>
> >      Message-Id:
> > <c3145fa37a529484cf3047c8cb9841e9effad4b0.1652583332.git.research_trasio at irq.a4lg.com>
> >      Signed-off-by: Alistair Francis <alistair.francis at wdc.com>
> > 
> > On Mon, May 23, 2022 at 1:45 PM Guenter Roeck <linux at roeck-us.net> wrote:
> >>
> >> On Tue, Mar 22, 2022 at 10:40:03PM +0800, guoren at kernel.org wrote:
> >>> From: Guo Ren <guoren at linux.alibaba.com>
> >>>
> >>> Adds initial skeletal COMPAT Kbuild (Running 32bit U-mode on
> >>> 64bit S-mode) support.
> >>>   - Setup kconfig & dummy functions for compiling.
> >>>   - Implement compat_start_thread by the way.
> >>>
> >>> Signed-off-by: Guo Ren <guoren at linux.alibaba.com>
> >>> Signed-off-by: Guo Ren <guoren at kernel.org>
> >>> Reviewed-by: Arnd Bergmann <arnd at arndb.de>
> >>> Tested-by: Heiko Stuebner <heiko at sntech.de>
> >>> Cc: Palmer Dabbelt <palmer at dabbelt.com>
> >>
> >> With this patch in linux-next, all my riscv64 emulations crash.
> >>
> >> [   11.600082] Run /sbin/init as init process
> >> [   11.628561] init[1]: unhandled signal 11 code 0x1 at 0x0000000000000000 in libc.so[ffffff8ad39000+a4000]
> >> [   11.629398] CPU: 0 PID: 1 Comm: init Not tainted 5.18.0-rc7-next-20220520 #1
> >> [   11.629462] Hardware name: riscv-virtio,qemu (DT)
> >> [   11.629546] epc : 00ffffff8ada1100 ra : 00ffffff8ada13c8 sp : 00ffffffc58199f0
> >> [   11.629586]  gp : 00ffffff8ad39000 tp : 00ffffff8ade0998 t0 : ffffffffffffffff
> >> [   11.629598]  t1 : 00ffffffc5819fd0 t2 : 0000000000000000 s0 : 00ffffff8ade0cc0
> >> [   11.629610]  s1 : 00ffffff8ade0cc0 a0 : 0000000000000000 a1 : 00ffffffc5819a00
> >> [   11.629622]  a2 : 0000000000000001 a3 : 000000000000001e a4 : 00ffffffc5819b00
> >> [   11.629634]  a5 : 00ffffffc5819b00 a6 : 0000000000000000 a7 : 0000000000000000
> >> [   11.629645]  s2 : 00ffffff8ade0ac8 s3 : 00ffffff8ade0ec8 s4 : 00ffffff8ade0728
> >> [   11.629656]  s5 : 00ffffff8ade0a90 s6 : 0000000000000000 s7 : 00ffffffc5819e40
> >> [   11.629667]  s8 : 00ffffff8ade0ca0 s9 : 00ffffff8addba50 s10: 0000000000000000
> >> [   11.629678]  s11: 0000000000000000 t3 : 0000000000000002 t4 : 0000000000000001
> >> [   11.629688]  t5 : 0000000000020000 t6 : ffffffffffffffff
> >> [   11.629699] status: 0000000000004020 badaddr: 0000000000000000 cause: 000000000000000d
> >> [   11.633421] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> >> [   11.633664] CPU: 0 PID: 1 Comm: init Not tainted 5.18.0-rc7-next-20220520 #1
> >> [   11.633784] Hardware name: riscv-virtio,qemu (DT)
> >> [   11.633881] Call Trace:
> >> [   11.633960] [<ffffffff80005e72>] dump_backtrace+0x1c/0x24
> >> [   11.634162] [<ffffffff809aa9ec>] show_stack+0x2c/0x38
> >> [   11.634274] [<ffffffff809b8482>] dump_stack_lvl+0x60/0x8e
> >> [   11.634386] [<ffffffff809b84c4>] dump_stack+0x14/0x1c
> >> [   11.634491] [<ffffffff809aaca0>] panic+0x116/0x2e2
> >> [   11.634596] [<ffffffff80015540>] do_exit+0x7ce/0x7d4
> >> [   11.634707] [<ffffffff80015666>] do_group_exit+0x24/0x7c
> >> [   11.634817] [<ffffffff80022294>] get_signal+0x7ee/0x830
> >> [   11.634924] [<ffffffff800051c0>] do_notify_resume+0x6c/0x41c
> >> [   11.635037] [<ffffffff80003ad4>] ret_from_exception+0x0/0x10
> >>
> >> Guenter
> >>
> >> ---
> >> # bad: [18ecd30af1a8402c162cca1bd58771c0e5be7815] Add linux-next specific files for 20220520
> >> # good: [42226c989789d8da4af1de0c31070c96726d990c] Linux 5.18-rc7
> >> git bisect start 'HEAD' 'v5.18-rc7'
> >> # bad: [f9b63740b666dd9887eb0282d21b5f65bb0cadd0] Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
> >> git bisect bad f9b63740b666dd9887eb0282d21b5f65bb0cadd0
> >> # bad: [7db97132097c5973ff77466d0ee681650af653de] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
> >> git bisect bad 7db97132097c5973ff77466d0ee681650af653de
> >> # good: [2b7d17d4b7c1ff40f58b0d32be40fc0bb6c582fb] soc: document merges
> >> git bisect good 2b7d17d4b7c1ff40f58b0d32be40fc0bb6c582fb
> >> # good: [69c9668f853fdd409bb8abbb37d615785510b29a] Merge branch 'clk-next' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git
> >> git bisect good 69c9668f853fdd409bb8abbb37d615785510b29a
> >> # bad: [1577f290aa0d4c5b29c03c46ef52e4952a21bfbb] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git
> >> git bisect bad 1577f290aa0d4c5b29c03c46ef52e4952a21bfbb
> >> # good: [34f0971f8ca73d7e5502b4cf299788a9402120f7] powerpc/powernv/flash: Check OPAL flash calls exist before using
> >> git bisect good 34f0971f8ca73d7e5502b4cf299788a9402120f7
> >> # good: [0349d7dfc70a26b3facd8ca97de34980d4b60954] Merge branch 'mips-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux.git
> >> git bisect good 0349d7dfc70a26b3facd8ca97de34980d4b60954
> >> # bad: [20bfb54d3b121699674c17a854c5ebc7a8f97d81] Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git
> >> git bisect bad 20bfb54d3b121699674c17a854c5ebc7a8f97d81
> >> # bad: [9be8459298eadb39b9fe9974b890239e9c123107] riscv: compat: Add COMPAT Kbuild skeletal support
> >> git bisect bad 9be8459298eadb39b9fe9974b890239e9c123107
> >> # good: [01abdfeac81b5f56062d0a78f2cdc805db937a75] riscv: compat: Support TASK_SIZE for compat mode
> >> git bisect good 01abdfeac81b5f56062d0a78f2cdc805db937a75
> >> # good: [f4b395e6f1a588ed6c9a30474e58cf6b27b65783] riscv: compat: Add hw capability check for elf
> >> git bisect good f4b395e6f1a588ed6c9a30474e58cf6b27b65783
> >> # good: [3092eb45637573c5e435fbf5eaf9516316e5f9c6] riscv: compat: vdso: Add setup additional pages implementation
> >> git bisect good 3092eb45637573c5e435fbf5eaf9516316e5f9c6
> >> # good: [4608c159594fb40a5101357d4f614fdde9ce1fdb] riscv: compat: ptrace: Add compat_arch_ptrace implement
> >> git bisect good 4608c159594fb40a5101357d4f614fdde9ce1fdb
> >> # first bad commit: [9be8459298eadb39b9fe9974b890239e9c123107] riscv: compat: Add COMPAT Kbuild skeletal support
> > 
> > 
> > 
> 
> 