From: Christoph Hellwig <hch@lst.de>
To: Guo Ren <guoren@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Arnd Bergmann <arnd@arndb.de>, Anup Patel <anup@brainfault.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
liush <liush@allwinnertech.com>, Wei Fu <wefu@redhat.com>,
Drew Fustini <drew@beagleboard.org>,
Wang Junqiang <wangjunqiang@iscas.ac.cn>,
Christoph Hellwig <hch@lst.de>,
linux-arch <linux-arch@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-riscv <linux-riscv@lists.infradead.org>,
linux-csky@vger.kernel.org,
linux-s390 <linux-s390@vger.kernel.org>,
sparclinux <sparclinux@vger.kernel.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Parisc List <linux-parisc@vger.kernel.org>,
"open list:BROADCOM NVRAM DRIVER" <linux-mips@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
the arch/x86 maintainers <x86@kernel.org>,
Guo Ren <guoren@linux.alibaba.com>
Subject: Re: [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support
Date: Tue, 1 Feb 2022 08:44:57 +0100 [thread overview]
Message-ID: <20220201074457.GC29119@lst.de> (raw)
In-Reply-To: <CAJF2gTRXDotO1L1FMojQs6msrqvCzA782Pux8rg3AfZgA=y0ew@mail.gmail.com>
On Mon, Jan 31, 2022 at 09:50:58PM +0800, Guo Ren wrote:
> On Mon, Jan 31, 2022 at 8:26 PM Christoph Hellwig <hch@infradead.org> wrote:
> >
> > Given that most rv64 implementations can't run in rv32 mode, what is the
> > failure mode if someone tries it with the compat mode enabled?
> A static linked simple hello_world could still run on a non-compat
> support hardware. But most rv32 apps would meet different userspace
> segment faults.
>
> Current code would let the machine try the rv32 apps without detecting
> whether hw support or not.
Hmm, we probably want some kind of check for not even offer running
rv32 binaries. I guess trying to write UXL some time during early
boot and catching the resulting exception would be the way to go?
>
>
> --
> Best Regards
> Guo Ren
>
> ML: https://lore.kernel.org/linux-csky/
---end quoted text---
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Guo Ren <guoren@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Arnd Bergmann <arnd@arndb.de>, Anup Patel <anup@brainfault.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
liush <liush@allwinnertech.com>, Wei Fu <wefu@redhat.com>,
Drew Fustini <drew@beagleboard.org>,
Wang Junqiang <wangjunqiang@iscas.ac.cn>,
Christoph Hellwig <hch@lst.de>,
linux-arch <linux-arch@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-riscv <linux-riscv@lists.infradead.org>,
linux-csky@vger.kernel.org,
linux-s390 <linux-s390@vger.kernel.org>,
sparclinux <sparclinux@vger.kernel.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Parisc List <linux-parisc@vger.kernel.org>,
"open list:BROADCOM NVRAM DRIVER" <linux-mips@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
the arch/x86 maintainers <x86@kernel.org>,
Guo Ren <guoren@linux.alibaba.com>
Subject: Re: [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support
Date: Tue, 1 Feb 2022 08:44:57 +0100 [thread overview]
Message-ID: <20220201074457.GC29119@lst.de> (raw)
In-Reply-To: <CAJF2gTRXDotO1L1FMojQs6msrqvCzA782Pux8rg3AfZgA=y0ew@mail.gmail.com>
On Mon, Jan 31, 2022 at 09:50:58PM +0800, Guo Ren wrote:
> On Mon, Jan 31, 2022 at 8:26 PM Christoph Hellwig <hch@infradead.org> wrote:
> >
> > Given that most rv64 implementations can't run in rv32 mode, what is the
> > failure mode if someone tries it with the compat mode enabled?
> A static linked simple hello_world could still run on a non-compat
> support hardware. But most rv32 apps would meet different userspace
> segment faults.
>
> Current code would let the machine try the rv32 apps without detecting
> whether hw support or not.
Hmm, we probably want some kind of check for not even offer running
rv32 binaries. I guess trying to write UXL some time during early
boot and catching the resulting exception would be the way to go?
>
>
> --
> Best Regards
> Guo Ren
>
> ML: https://lore.kernel.org/linux-csky/
---end quoted text---
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Guo Ren <guoren@kernel.org>
Cc: Guo Ren <guoren@linux.alibaba.com>,
"open list:BROADCOM NVRAM DRIVER" <linux-mips@vger.kernel.org>,
sparclinux <sparclinux@vger.kernel.org>,
linux-riscv <linux-riscv@lists.infradead.org>,
Christoph Hellwig <hch@lst.de>,
linux-arch <linux-arch@vger.kernel.org>,
linux-s390 <linux-s390@vger.kernel.org>,
Anup Patel <anup@brainfault.org>,
the arch/x86 maintainers <x86@kernel.org>,
linux-csky@vger.kernel.org, Christoph Hellwig <hch@infradead.org>,
Arnd Bergmann <arnd@arndb.de>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Parisc List <linux-parisc@vger.kernel.org>,
Drew Fustini <drew@beagleboard.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Wang Junqiang <wangjunqiang@iscas.ac.cn>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
liush <liush@allwinnertech.com>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Wei Fu <wefu@redhat.com>
Subject: Re: [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support
Date: Tue, 1 Feb 2022 08:44:57 +0100 [thread overview]
Message-ID: <20220201074457.GC29119@lst.de> (raw)
In-Reply-To: <CAJF2gTRXDotO1L1FMojQs6msrqvCzA782Pux8rg3AfZgA=y0ew@mail.gmail.com>
On Mon, Jan 31, 2022 at 09:50:58PM +0800, Guo Ren wrote:
> On Mon, Jan 31, 2022 at 8:26 PM Christoph Hellwig <hch@infradead.org> wrote:
> >
> > Given that most rv64 implementations can't run in rv32 mode, what is the
> > failure mode if someone tries it with the compat mode enabled?
> A static linked simple hello_world could still run on a non-compat
> support hardware. But most rv32 apps would meet different userspace
> segment faults.
>
> Current code would let the machine try the rv32 apps without detecting
> whether hw support or not.
Hmm, we probably want some kind of check for not even offer running
rv32 binaries. I guess trying to write UXL some time during early
boot and catching the resulting exception would be the way to go?
>
>
> --
> Best Regards
> Guo Ren
>
> ML: https://lore.kernel.org/linux-csky/
---end quoted text---
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Guo Ren <guoren@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Arnd Bergmann <arnd@arndb.de>, Anup Patel <anup@brainfault.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
liush <liush@allwinnertech.com>, Wei Fu <wefu@redhat.com>,
Drew Fustini <drew@beagleboard.org>,
Wang Junqiang <wangjunqiang@iscas.ac.cn>,
Christoph Hellwig <hch@lst.de>,
linux-arch <linux-arch@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-riscv <linux-riscv@lists.infradead.org>,
linux-csky@vger.kernel.org,
linux-s390 <linux-s390@vger.kernel.org>,
sparclinux <sparclinux@vger.kernel.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Parisc List <linux-parisc@vger.kernel.org>,
"open list:BROADCOM NVRAM DRIVER" <linux-mips@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
the arch/x86 maintainers <x86@kernel.org>,
Guo Ren <guoren@linux.alibaba.com>
Subject: Re: [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support
Date: Tue, 1 Feb 2022 08:44:57 +0100 [thread overview]
Message-ID: <20220201074457.GC29119@lst.de> (raw)
In-Reply-To: <CAJF2gTRXDotO1L1FMojQs6msrqvCzA782Pux8rg3AfZgA=y0ew@mail.gmail.com>
On Mon, Jan 31, 2022 at 09:50:58PM +0800, Guo Ren wrote:
> On Mon, Jan 31, 2022 at 8:26 PM Christoph Hellwig <hch@infradead.org> wrote:
> >
> > Given that most rv64 implementations can't run in rv32 mode, what is the
> > failure mode if someone tries it with the compat mode enabled?
> A static linked simple hello_world could still run on a non-compat
> support hardware. But most rv32 apps would meet different userspace
> segment faults.
>
> Current code would let the machine try the rv32 apps without detecting
> whether hw support or not.
Hmm, we probably want some kind of check for not even offer running
rv32 binaries. I guess trying to write UXL some time during early
boot and catching the resulting exception would be the way to go?
>
>
> --
> Best Regards
> Guo Ren
>
> ML: https://lore.kernel.org/linux-csky/
---end quoted text---
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-02-01 7:45 UTC|newest]
Thread overview: 172+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-29 12:17 [PATCH V4 00/17] riscv: compat: Add COMPAT mode support for rv64 guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` [PATCH V4 01/17] kconfig: Add SYSVIPC_COMPAT for all architectures guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-31 12:19 ` Christoph Hellwig
2022-01-31 12:19 ` Christoph Hellwig
2022-01-31 12:19 ` Christoph Hellwig
2022-01-31 12:19 ` Christoph Hellwig
2022-01-29 12:17 ` [PATCH V4 02/17] fs: stat: compat: Add __ARCH_WANT_COMPAT_STAT guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-31 12:19 ` Christoph Hellwig
2022-01-31 12:19 ` Christoph Hellwig
2022-01-31 12:19 ` Christoph Hellwig
2022-01-31 12:19 ` Christoph Hellwig
2022-01-29 12:17 ` [PATCH V4 03/17] asm-generic: compat: Cleanup duplicate definitions guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 21:40 ` Arnd Bergmann
2022-01-29 21:40 ` Arnd Bergmann
2022-01-29 21:40 ` Arnd Bergmann
2022-01-29 21:40 ` Arnd Bergmann
2022-01-31 12:21 ` Christoph Hellwig
2022-01-31 12:21 ` Christoph Hellwig
2022-01-31 12:21 ` Christoph Hellwig
2022-01-31 12:21 ` Christoph Hellwig
2022-01-31 13:52 ` Guo Ren
2022-01-31 13:52 ` Guo Ren
2022-01-31 13:52 ` Guo Ren
2022-01-31 13:52 ` Guo Ren
2022-01-29 12:17 ` [PATCH V4 04/17] syscalls: compat: Fix the missing part for __SYSCALL_COMPAT guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-31 12:21 ` Christoph Hellwig
2022-01-31 12:21 ` Christoph Hellwig
2022-01-31 12:21 ` Christoph Hellwig
2022-01-31 12:21 ` Christoph Hellwig
2022-01-29 12:17 ` [PATCH V4 05/17] riscv: Fixup difference with defconfig guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-31 12:23 ` Christoph Hellwig
2022-01-31 12:23 ` Christoph Hellwig
2022-01-31 12:23 ` Christoph Hellwig
2022-01-31 12:23 ` Christoph Hellwig
2022-01-31 12:48 ` Arnd Bergmann
2022-01-31 12:48 ` Arnd Bergmann
2022-01-31 12:48 ` Arnd Bergmann
2022-01-31 12:48 ` Arnd Bergmann
2022-01-31 13:00 ` Christoph Hellwig
2022-01-31 13:00 ` Christoph Hellwig
2022-01-31 13:00 ` Christoph Hellwig
2022-01-31 13:00 ` Christoph Hellwig
2022-01-31 13:19 ` Arnd Bergmann
2022-01-31 13:19 ` Arnd Bergmann
2022-01-31 13:19 ` Arnd Bergmann
2022-01-31 13:19 ` Arnd Bergmann
2022-01-29 12:17 ` [PATCH V4 06/17] riscv: compat: Add basic compat date type implementation guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 21:56 ` Arnd Bergmann
2022-01-29 21:56 ` Arnd Bergmann
2022-01-29 21:56 ` Arnd Bergmann
2022-01-29 21:56 ` Arnd Bergmann
2022-01-30 5:47 ` Guo Ren
2022-01-30 5:47 ` Guo Ren
2022-01-30 5:47 ` Guo Ren
2022-01-30 5:47 ` Guo Ren
2022-01-30 11:36 ` Arnd Bergmann
2022-01-30 11:36 ` Arnd Bergmann
2022-01-30 11:36 ` Arnd Bergmann
2022-01-30 11:36 ` Arnd Bergmann
2022-01-29 12:17 ` [PATCH V4 07/17] riscv: compat: Re-implement TASK_SIZE for COMPAT_32BIT guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` [PATCH V4 08/17] riscv: compat: syscall: Add compat_sys_call_table implementation guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 22:12 ` Arnd Bergmann
2022-01-29 22:12 ` Arnd Bergmann
2022-01-29 22:12 ` Arnd Bergmann
2022-01-29 22:12 ` Arnd Bergmann
2022-01-30 5:54 ` Guo Ren
2022-01-30 5:54 ` Guo Ren
2022-01-30 5:54 ` Guo Ren
2022-01-30 5:54 ` Guo Ren
2022-01-30 11:32 ` Arnd Bergmann
2022-01-30 11:32 ` Arnd Bergmann
2022-01-30 11:32 ` Arnd Bergmann
2022-01-30 11:32 ` Arnd Bergmann
2022-01-30 14:57 ` Guo Ren
2022-01-30 14:57 ` Guo Ren
2022-01-30 14:57 ` Guo Ren
2022-01-30 14:57 ` Guo Ren
2022-01-29 12:17 ` [PATCH V4 09/17] riscv: compat: syscall: Add entry.S implementation guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` [PATCH V4 10/17] riscv: compat: process: Add UXL_32 support in start_thread guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` [PATCH V4 11/17] riscv: compat: Add elf.h implementation guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` [PATCH V4 12/17] riscv: compat: vdso: Add rv32 VDSO base code implementation guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` [PATCH V4 13/17] riscv: compat: vdso: Add setup additional pages implementation guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` [PATCH V4 14/17] riscv: compat: signal: Add rt_frame implementation guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` [PATCH V4 15/17] riscv: compat: ptrace: Add compat_arch_ptrace implement guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` [PATCH V4 16/17] riscv: compat: Add COMPAT Kbuild skeletal support guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-31 12:26 ` Christoph Hellwig
2022-01-31 12:26 ` Christoph Hellwig
2022-01-31 12:26 ` Christoph Hellwig
2022-01-31 12:26 ` Christoph Hellwig
2022-01-31 13:50 ` Guo Ren
2022-01-31 13:50 ` Guo Ren
2022-01-31 13:50 ` Guo Ren
2022-01-31 13:50 ` Guo Ren
2022-02-01 7:44 ` Christoph Hellwig [this message]
2022-02-01 7:44 ` Christoph Hellwig
2022-02-01 7:44 ` Christoph Hellwig
2022-02-01 7:44 ` Christoph Hellwig
2022-02-01 9:13 ` Guo Ren
2022-02-01 9:13 ` Guo Ren
2022-02-01 9:13 ` Guo Ren
2022-02-01 9:13 ` Guo Ren
2022-02-01 9:36 ` Arnd Bergmann
2022-02-01 9:36 ` Arnd Bergmann
2022-02-01 9:36 ` Arnd Bergmann
2022-02-01 9:36 ` Arnd Bergmann
2022-02-01 10:26 ` Guo Ren
2022-02-01 10:26 ` Guo Ren
2022-02-01 10:26 ` Guo Ren
2022-02-01 10:26 ` Guo Ren
2022-02-01 11:48 ` Arnd Bergmann
2022-02-01 11:48 ` Arnd Bergmann
2022-02-01 11:48 ` Arnd Bergmann
2022-02-01 11:48 ` Arnd Bergmann
2022-02-01 13:56 ` Guo Ren
2022-02-01 13:56 ` Guo Ren
2022-02-01 13:56 ` Guo Ren
2022-02-01 13:56 ` Guo Ren
2022-01-29 12:17 ` [PATCH V4 17/17] KVM: compat: riscv: Prevent KVM_COMPAT from being selected guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
2022-01-29 12:17 ` guoren
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