Two places deserve using the macro is_tsk_32bit_task() added by
commit 252745240ba0 ("powerpc/audit: Fix syscall_get_arch()")
Signed-off-by: Christophe Leroy
---
arch/powerpc/kernel/ptrace/ptrace-view.c | 2 +-
arch/powerpc/perf/perf_regs.c| 8 +++-
2 files changed, 4
Le 01/07/2020 à 09:22, Aneesh Kumar K.V a écrit :
Start using dcbstps; phwsync; sequence for flushing persistent memory range.
The new instructions are implemented as a variant of dcbf and hwsync and on
P8 and P9 they will be executed as those instructions. We avoid using them on
older hardware.
On Thu, Jan 20, 2022 at 6:31 PM Arnd Bergmann wrote:
>
> On Thu, Jan 20, 2022 at 8:39 AM wrote:
> >
> > From: Guo Ren
> >
> > Implement compat_setup_rt_frame for sigcontext save & restore. The
> > main process is the same with signal, but the rv32 pt_regs' size
> > is different from rv64's, so
On Thu, Jan 20, 2022 at 5:35 PM Arnd Bergmann wrote:
>
> On Thu, Jan 20, 2022 at 8:38 AM wrote:
>
> > @@ -0,0 +1,136 @@
> > +/* SPDX-License-Identifier: GPL-2.0-only */
> > +#ifndef __ASM_COMPAT_H
> > +#define __ASM_COMPAT_H
> > +
> > +#define compat_mode_t compat_mode_t
> > +typedef u16
On Thu, Jan 20, 2022 at 6:32 PM Arnd Bergmann wrote:
>
> On Thu, Jan 20, 2022 at 8:39 AM wrote:
> >
> > From: Guo Ren
> >
> > Current riscv doesn't support the 32bit KVM/arm API. Let's make it
> > clear by not selecting KVM_COMPAT.
> >
> > Signed-off-by: Guo Ren
> > ---
> > virt/kvm/Kconfig |
On Thu, Jan 20, 2022 at 10:43 PM Arnd Bergmann wrote:
>
> On Thu, Jan 20, 2022 at 8:39 AM wrote:
> >
> > /* The array of function pointers for syscalls. */
> > extern void * const sys_call_table[];
> > +#ifdef CONFIG_COMPAT
> > +extern void * const compat_sys_call_table[];
> > +#endif
>
> No
This adds the infrastructure for writing tests for the powerpc
platform (Only Radix MMU for now).
This patch also enables two tests:
- a dummy sample test that creates a guest with one vcpu, issues
hypercalls and reads/writes test values from memory.
- the kvm_page_table test, although at
This series adds the initial support for ppc64le Book3s with Radix
MMU.
At this time I'm including only the kvm_page_table test and a dummy
test to serve as a sample of what can be done with these tests. I
intend to make a pass over the remaining common tests and add the ones
which could be built
Our kvm_arch_vcpu_ioctl_run currently returns the RESUME_HOST values
to userspace, against the API of the KVM_RUN ioctl which returns 0 on
success.
Signed-off-by: Fabiano Rosas
Reviewed-by: Nicholas Piggin
---
This was noticed while enabling the kvm selftests for powerpc. There's
an assert at
...
> One example of software that runs into virtual memory size limitations is
> the gnu linker when building large applications, but it's unlikely that you'll
> actually need to run applications that run into this, while also needing to
> build them natively.
There are also database programs
On Thu, Jan 20, 2022 at 2:27 PM Guo Ren wrote:
> On Thu, Jan 20, 2022 at 8:53 PM David Laight wrote:
> > I think the x86-64 32bit compat code even puts the boundary at 4GB.
> Yes, we could give rv32 compat for 4GB with some effort. But it's unnecessary.
>
> There are no history issues for rv32,
On Thu, Jan 20, 2022 at 8:39 AM wrote:
>
> /* The array of function pointers for syscalls. */
> extern void * const sys_call_table[];
> +#ifdef CONFIG_COMPAT
> +extern void * const compat_sys_call_table[];
> +#endif
No need for the #ifdef, the normal convention is to just define the
extern
On Thu, Jan 20, 2022 at 9:39 PM Arnd Bergmann wrote:
>
> On Thu, Jan 20, 2022 at 8:39 AM wrote:
> > +
> > +#ifdef CONFIG_COMPAT
> > + if (is_compat_task())
> > + regs->status |= SR_UXL_32;
> > +#endif
>
>
> You should not need that #ifdef, as the is_compat_task() definition
On Thu, Jan 20, 2022 at 9:33 PM Arnd Bergmann wrote:
>
> On Thu, Jan 20, 2022 at 8:39 AM wrote:
> > From: Guo Ren
> >
> > Implement necessary type and macro for compat elf. See the code
> > comment for detail.
> >
> > Signed-off-by: Guo Ren
>
> Reviewed-by: Arnd Bergmann
>
> > +
> > +/*
> > +
On Thu, Jan 20, 2022 at 8:53 PM David Laight wrote:
>
> > > Limit 32-bit compatible process in 0-2GB virtual address range
> > > (which is enough for real scenarios), because it could avoid
> > > address sign extend problem when 32-bit enter 64-bit and ease
> > > software design.
>
> Eh?
> I
Hi, this is your Linux kernel regression tracker speaking.
On 04.12.21 01:40, Leo Li wrote:
>> -Original Message-
>> From: Joakim Tjernlund
>> Sent: Thursday, December 2, 2021 4:45 PM
>> To: regressi...@leemhuis.info; Leo Li ;
>> eugene_bordenkirc...@selinc.com;
From: Arnd Bergmann
> Sent: 20 January 2022 11:52
..
> As with compat_flock, the packed attribute has no impact on the layout
> here, but please drop it anyway for consistency.
Never mind the structure layout, because 'packed' allows the
structure to be aligned on any boundary it forces the
Hi, this is your Linux kernel regression tracker speaking.
On 15.12.21 18:34, Tokunori Ikegami wrote:
> Hi Ahmad-san,
>
> Sorry for the regression issue by the change: dfeae1073583.
> To make sure could you please try with the word write instead of the
> buffered writes?
Ahmad, did you try what
> > Limit 32-bit compatible process in 0-2GB virtual address range
> > (which is enough for real scenarios), because it could avoid
> > address sign extend problem when 32-bit enter 64-bit and ease
> > software design.
Eh?
I thought nearly all the other 32bit unix ports (of any flavour)
put the
On Thu, Jan 20, 2022 at 8:38 AM wrote:
>
> From: Guo Ren
>
> There are 7 64bit architectures that support Linux COMPAT mode to
> run 32bit applications. A lot of definitions are duplicate:
> - COMPAT_USER_HZ
> - COMPAT_RLIM_INFINITY
> - COMPAT_OFF_T_MAX
> - __compat_uid_t, __compat_uid_t
>
On Thu, Jan 20, 2022 at 8:39 AM wrote:
>
> From: Guo Ren
>
> Implement compat_setup_rt_frame for sigcontext save & restore. The
> main process is the same with signal, but the rv32 pt_regs' size
> is different from rv64's, so we needs convert them.
>
> Signed-off-by: Guo Ren
> Signed-off-by:
In realmode mce handler we use irq_work_queue() to defer
the processing of mce events, irq_work_queue() can only
be called when translation is enabled because it touches
memory outside RMA, hence we enable translation before
calling irq_work_queue and disable on return, though it
is not safe to do
On Thu, Jan 20, 2022 at 8:39 AM wrote:
>
> From: Guo Ren
>
> Adds initial skeletal COMPAT Kbuild (Runing 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
> Signed-off-by: Guo
On Thu, Jan 20, 2022 at 8:39 AM wrote:
>
> From: Guo Ren
>
> Make TASK_SIZE from const to dynamic detect TIF_32BIT flag
> function. Refer to arm64 to implement DEFAULT_MAP_WINDOW_64 for
> efi-stub.
>
> Limit 32-bit compatible process in 0-2GB virtual address range
> (which is enough for real
On Thu, Jan 20, 2022 at 8:39 AM wrote:
>
> From: Guo Ren
>
> Current riscv doesn't support the 32bit KVM/arm API. Let's make it
> clear by not selecting KVM_COMPAT.
>
> Signed-off-by: Guo Ren
> ---
> virt/kvm/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git
Hi Michael,
ping ?
Le 06/12/2021 à 12:11, Christophe Leroy a écrit :
> Unmapping a fixmap entry is done by calling __set_fixmap()
> with FIXMAP_PAGE_CLEAR as flags.
>
> Today, powerpc __set_fixmap() calls map_kernel_page().
>
> map_kernel_page() is not happy when called a second time
> for the
On Thu, Jan 20, 2022 at 8:39 AM wrote:
> +
> +#ifdef CONFIG_COMPAT
> + if (is_compat_task())
> + regs->status |= SR_UXL_32;
> +#endif
You should not need that #ifdef, as the is_compat_task() definition is
meant to drop the code at compile time, unless the SR_UXL_32
On Thu, Jan 20, 2022 at 8:39 AM wrote:
> From: Guo Ren
>
> Implement necessary type and macro for compat elf. See the code
> comment for detail.
>
> Signed-off-by: Guo Ren
Reviewed-by: Arnd Bergmann
> +
> +/*
> + * FIXME: not sure SET_PERSONALITY for compat process is right!
> + */
>
On Thu, Jan 20, 2022 at 8:38 AM wrote:
> @@ -0,0 +1,136 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +#ifndef __ASM_COMPAT_H
> +#define __ASM_COMPAT_H
> +
> +#define compat_mode_t compat_mode_t
> +typedef u16compat_mode_t;
I think this one is wrong, as rv32 should get the
On Thu, Jan 20, 2022 at 8:38 AM wrote:
>
> From: Guo Ren
>
> Make "uapi asm unistd.h" could be used for architectures' COMPAT
> mode. The __SYSCALL_COMPAT is first used in riscv.
>
> Signed-off-by: Guo Ren
> Signed-off-by: Guo Ren
> Cc: Arnd Bergmann
Reviewed-by: Arnd Bergmann
Hi!
Since this change in [1], the kernel no longer builds on 32- and 64-bit PowerPC
and I was wondering whether anyone has already a patch available fixing this
issue?
Thanks,
Adrian
> [1]
> https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=b25f942e18d6ecd7ec3e2d2e9930eb4f996c258a
--
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