Benjamin Herrenschmidt writes:
> On Fri, 2016-08-19 at 14:22 +0530, Aneesh Kumar K.V wrote:
>> Signed-off-by: Aneesh Kumar K.V
>> ---
>> arch/powerpc/include/asm/book3s/64/tlbflush-radix.h | 1 +
>> arch/powerpc/mm/tlb-radix.c | 15
>> +++
>> 2 files changed
Balbir Singh writes:
> ISA 3 allows for prevention of instruction fetch and execution
> of user mode pages. If such an error occurs, SRR1 bit 35
> reports the error. We catch and report the error in do_page_fault()
>
But what does the error mean ? A buggy application ? IIUC, it indicate a
buggy
Balbir Singh writes:
> ISA 3 defines new encoded access authority that allows instruction
> access prevention in privileged mode and allows normal access
> to problem state. This patch just enables IAMR (Instruction Authority
> Mask Register), enabling AMR would require more work.
>
Don't we nee
Userspace can begin and suspend a transaction within the signal
handler which means they might enter sys_rt_sigreturn() with the
processor in suspended state.
sys_rt_sigreturn() wants to restore process context (which may have
been in a transaction before signal delivery). To do this it must
resto
On Fri, 2016-08-19 at 19:21 +0200, Laurent Dufour wrote:
> Hi,
>
> While working on the TM support for CRIU, I faced a TM Bad Thing
> exception.
>
> Digging further, I found that it is *easy* to raised it from the user
> space. I attached below a simple program which raise it all the time,
> like
Am Montag, 22 August 2016, 11:36:43 schrieb Dave Young:
> On 08/22/16 at 12:25am, Thiago Jung Bauermann wrote:
> > Am Montag, 22 August 2016, 11:17:45 schrieb Dave Young:
> > > On 08/18/16 at 06:09pm, Thiago Jung Bauermann wrote:
> > > > Hello Dave,
> > > >
> > > > Thanks for your review!
> > > >
Am Montag, 22 August 2016, 11:21:35 schrieb Dave Young:
> On 08/13/16 at 12:18am, Thiago Jung Bauermann wrote:
> > diff --git a/arch/powerpc/kernel/machine_kexec_64.c
> > b/arch/powerpc/kernel/machine_kexec_64.c index
> > a484a6346146..190c652e49b7 100644
> > --- a/arch/powerpc/kernel/machine_kexec
On 08/22/16 at 12:25am, Thiago Jung Bauermann wrote:
> Am Montag, 22 August 2016, 11:17:45 schrieb Dave Young:
> > On 08/18/16 at 06:09pm, Thiago Jung Bauermann wrote:
> > > Hello Dave,
> > >
> > > Thanks for your review!
> > >
> > > [ Trimming down Cc: list a little to try to clear the "too many
Am Montag, 22 August 2016, 11:17:45 schrieb Dave Young:
> On 08/18/16 at 06:09pm, Thiago Jung Bauermann wrote:
> > Hello Dave,
> >
> > Thanks for your review!
> >
> > [ Trimming down Cc: list a little to try to clear the "too many
> > recipients">
> > mailing list restriction. ]
>
> I also go
On 08/13/16 at 12:18am, Thiago Jung Bauermann wrote:
> The buffer hand-over mechanism allows the currently running kernel to pass
> data to kernel that will be kexec'd via a kexec segment. The second kernel
> can check whether the previous kernel sent data and retrieve it.
>
> This is the architec
On 08/18/16 at 06:09pm, Thiago Jung Bauermann wrote:
> Hello Dave,
>
> Thanks for your review!
>
> [ Trimming down Cc: list a little to try to clear the "too many recipients"
> mailing list restriction. ]
I also got "too many recipients".. Thanks for the trimming.
>
> Am Donnerstag, 18 Au
On Fri, 2016-07-22 at 17:27 +1000, Nicholas Piggin wrote:
> tabort_syscall runs with RI=1, so a nested recoverable machine
> check will load the paca into r13 and overwrite what we loaded
> it with, because exceptions returning to privileged mode do not
> restore r13.
>
> This has survived testing
On Fri, 2016-08-19 at 19:21 +0200, Laurent Dufour wrote:
> Hi,
>
> While working on the TM support for CRIU, I faced a TM Bad Thing exception.
>
> Digging further, I found that it is *easy* to raised it from the user
> space. I attached below a simple program which raise it all the time,
> like t
ISA 3 allows for prevention of instruction fetch and execution
of user mode pages. If such an error occurs, SRR1 bit 35
reports the error. We catch and report the error in do_page_fault()
Signed-off-by: Balbir Singh
---
arch/powerpc/mm/fault.c | 4
1 file changed, 4 insertions(+)
diff --gi
ISA 3 defines new encoded access authority that allows instruction
access prevention in privileged mode and allows normal access
to problem state. This patch just enables IAMR (Instruction Authority
Mask Register), enabling AMR would require more work.
I've tested this with a buggy driver and a si
On Tue, 2016-08-02 at 13:43 +0800, Simon Guo wrote:
> Hi Laurent,
> On Fri, Jul 29, 2016 at 11:51:22AM +0200, Laurent Dufour wrote:
> >
> > static int set_user_msr(struct task_struct *task, unsigned long
> > msr)
> > {
> > +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
> > + if (!(task->thread.regs->msr
On Fri, 2016-08-19 at 14:22 +0530, Aneesh Kumar K.V wrote:
> Signed-off-by: Aneesh Kumar K.V
> ---
> arch/powerpc/include/asm/book3s/64/tlbflush-radix.h | 1 +
> arch/powerpc/mm/tlb-radix.c | 15
> +++
> 2 files changed, 16 insertions(+)
Don't we need two ? O
Reza Arbab writes:
> Memory hotplug is leading to hash page table calls, even on radix:
>
> ...
> arch_add_memory
> create_section_mapping
> htab_bolt_mapping
> BUG_ON(!ppc_md.hpte_insert);
>
> Refactor {create,remove}_sectio
Denys Vlasenko writes:
> On 32-bit powerpc the ELF PLT sections of binaries (built with --bss-plt,
> or with a toolchain which defaults to it) look like this:
>
> [17] .sbss NOBITS 0002aff8 01aff8 14 00 WA 0 0
> 4
> [18] .plt NOBITS 0002b00
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