On Mon, Feb 17, 2020 at 05:23:07PM +1100, Michael Neuling wrote:
> > > Hence, we should NOP this, not generate an illegal.
> >
> > It is not a reserved bit.
> >
> > The IMC entry for it matches op1=01 op2=101110 presumably, which
> > catches all TM instructions and nothing else (bits 0..5
On Mon, Feb 17, 2020 at 6:04 AM Anshuman Khandual
wrote:
> Lets move vma_is_accessible() helper to include/linux/mm.h which makes it
> available for general use. While here, this replaces all remaining open
> encodings for VMA access check with vma_is_accessible().
>
> Cc: Guo Ren
> Cc: Geert Uyt
Hi Mikey,
Le 28/06/2019 à 17:47, Christophe Leroy a écrit :
The purpose of this series is to reduce the amount of #ifdefs
in ptrace.c
Any feedback on this series which aims at fixing the issue you opened at
https://github.com/linuxppc/issues/issues/128 ?
Thanks
Christophe
This is a first
Le 17/02/2020 à 00:08, Michael Neuling a écrit :
Daniel.
Can you start this commit message with a simple description of what you are
actually doing? This reads like you've been on a long journey to Mordor and
back, which as a reader of this patch in the long distant future, I don't care
about
Le 16/02/2020 à 23:40, Michael Neuling a écrit :
On Fri, 2020-02-14 at 08:33 +, Christophe Leroy wrote:
With CONFIG_VMAP_STACK, data MMU has to be enabled
to read data on the stack.
Can you describe what goes wrong without this? Some oops message? rtas blows up?
Get corrupt data?
Larr
Le 15/02/2020 à 06:36, Leonardo Bras a écrit :
Before checking for cpu_type == NULL, this same copy happens, so doing
it here will just write the same value to the t->oprofile_type
again.
Remove the repeated copy, as it is unnecessary.
Signed-off-by: Leonardo Bras
---
arch/powerpc/kernel/
On Sun, Feb 16, 2020 at 08:22:30AM +, Russell King - ARM Linux admin wrote:
> On Sun, Feb 16, 2020 at 10:18:30AM +0200, Mike Rapoport wrote:
> > From: Mike Rapoport
> >
> > Hi,
> >
> > These patches convert several architectures to use page table folding and
> > remove __ARCH_HAS_5LEVEL_HACK
On Sun, 2020-02-16 at 23:57 -0600, Segher Boessenkool wrote:
> On Mon, Feb 17, 2020 at 12:07:31PM +1100, Michael Neuling wrote:
> > On Thu, 2020-02-13 at 10:15 -0500, Gustavo Romero wrote:
> > > On P9 DD2.2 due to a CPU defect some TM instructions need to be emulated
> > > by
> > > KVM. This is han
On Mon, Feb 17, 2020 at 12:07:31PM +1100, Michael Neuling wrote:
> On Thu, 2020-02-13 at 10:15 -0500, Gustavo Romero wrote:
> > On P9 DD2.2 due to a CPU defect some TM instructions need to be emulated by
> > KVM. This is handled at first by the hardware raising a softpatch interrupt
> > when certai
This replaces all remaining open encodings with is_vm_hugetlb_page().
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Michael Ellerman
Cc: Alexander Viro
Cc: Will Deacon
Cc: "Aneesh Kumar K.V"
Cc: Andrew Morton
Cc: Nick Piggin
Cc: Peter Zijlstra
Cc: Arnd Bergmann
Cc: Ingo Molnar
Cc: A
Lets move vma_is_accessible() helper to include/linux/mm.h which makes it
available for general use. While here, this replaces all remaining open
encodings for VMA access check with vma_is_accessible().
Cc: Guo Ren
Cc: Geert Uytterhoeven
Cc: Paul Burton
Cc: Benjamin Herrenschmidt
Cc: Paul Mack
Apart from adding a VMA flag readable name for trace purpose, this series
does some open encoding replacements with availabe VMA specific wrappers.
This skips VM_HUGETLB check in vma_migratable() as its already being done
with another patch (https://patchwork.kernel.org/patch/11347831/) which
is ye
The ls (lookup symbol) and zr (reboot) commands use xmon's getstring()
helper to read a string argument from the xmon prompt. This function skips
over leading whitespace, but doesn't check if the first "non-whitespace"
character is a newline which causes some odd behaviour ( indicates
a the enter k
This adds tests which will validate architecture page table helpers and
other accessors in their compliance with expected generic MM semantics.
This will help various architectures in validating changes to existing
page table helpers or addition of new ones.
This test covers basic page table entry
On 2/16/20 7:16 PM, Cédric Le Goater wrote:
>
> I think this is fixed by commit f55750e4e4fb ("spapr/xive: Mask the EAS when
> allocating an IRQ") which is not in QEMU 4.1.1. The same problem should also
> occur with LE guests.
>
> Could you possibly regenerate the QEMU rpm with this patch ?
>
Add a way to manually invoke a fast-reboot rather than setting the NVRAM
flag. The idea is to allow userspace to invoke a fast-reboot using the
optional string argument to the reboot() system call, or using the xmon
zr command so we don't need to leave around a persistent changes on
a system to use
Treat an empty reboot cmd string the same as a NULL string. This squashes a
spurious unsupported reboot message that sometimes gets out when using
xmon.
Signed-off-by: Oliver O'Halloran
---
arch/powerpc/platforms/powernv/setup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a
On Thu, 2020-02-13 at 10:15 -0500, Gustavo Romero wrote:
> On P9 DD2.2 due to a CPU defect some TM instructions need to be emulated by
> KVM. This is handled at first by the hardware raising a softpatch interrupt
> when certain TM instructions that need KVM assistance are executed in the
> guest. S
Daniel.
Can you start this commit message with a simple description of what you are
actually doing? This reads like you've been on a long journey to Mordor and
back, which as a reader of this patch in the long distant future, I don't care
about. I just want to know what you're implementing.
Also
Paulus,
Something below for you I think
> We have an IBM POWER server (8247-42L) running Linux kernel 5.4.13 on Debian
> unstable
> hosting a big-endian ppc64 virtual machine running the same kernel in
> big-endian
> mode.
>
> When building OpenJDK-11 on the big-endian VM, the testsuite crash
On Fri, 2020-02-14 at 08:33 +, Christophe Leroy wrote:
> With CONFIG_VMAP_STACK, data MMU has to be enabled
> to read data on the stack.
Can you describe what goes wrong without this? Some oops message? rtas blows up?
Get corrupt data?
Also can you say what you're actually doing (ie turning o
On Sat, 2020-02-15 at 02:36 -0300, Leonardo Bras wrote:
> Before checking for cpu_type == NULL, this same copy happens, so doing
> it here will just write the same value to the t->oprofile_type
> again.
>
> Remove the repeated copy, as it is unnecessary.
>
> Signed-off-by: Leonardo Bras
LGTM
R
On 2/11/20 4:57 AM, dftxbs3e wrote:
> Hello,
>
> I took a snapshot of a ppc64 (big endian) VM from a ppc64 (little endian)
> host using `virsh snapshot-create-as --domain --name `
>
> Then I restarted my system and tried restoring the snapshot:
>
> # virsh snapshot-revert --domain --snapshotna
On Sat, Jan 11, 2020 at 12:33 PM Segher Boessenkool
wrote:
>
> On Fri, Jan 10, 2020 at 07:45:44AM +0100, Christophe Leroy wrote:
> > Le 09/01/2020 à 21:07, Segher Boessenkool a écrit :
> > >It looks like the compiler did loop peeling. What GCC version is this?
> > >Please try current trunk (to be
On Sat, 15 Feb 2020 11:28:49 +0100
Christophe Leroy wrote:
> Hi,
>
> Le 14/02/2020 à 14:54, Masami Hiramatsu a écrit :
> > Hi,
> >
> > On Fri, 14 Feb 2020 12:47:49 + (UTC)
> > Christophe Leroy wrote:
> >
> >> When a program check exception happens while MMU translation is
> >> disabled, f
Le 16/02/2020 à 09:22, Russell King - ARM Linux admin a écrit :
On Sun, Feb 16, 2020 at 10:18:30AM +0200, Mike Rapoport wrote:
From: Mike Rapoport
Hi,
These patches convert several architectures to use page table folding and
remove __ARCH_HAS_5LEVEL_HACK along with include/asm-generic/5lev
Le 16/02/2020 à 09:18, Mike Rapoport a écrit :
From: Mike Rapoport
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate and replace 5level-fixup.h with pgtable-nop4d.h.
I don't think it is worth adding all this additionnals walks of p4d,
this
https://bugzilla.kernel.org/show_bug.cgi?id=206525
--- Comment #4 from Christophe Leroy (christophe.le...@c-s.fr) ---
Feedback from Nikolay:
I think we can just cap these at min(BITS_PER_TYPE(u32), nlk->ngroups) since
"groups" is coming from sockaddr_nl's "nl_groups" which is a u32, for any
group
On Sun, Feb 16, 2020 at 10:18:30AM +0200, Mike Rapoport wrote:
> From: Mike Rapoport
>
> Hi,
>
> These patches convert several architectures to use page table folding and
> remove __ARCH_HAS_5LEVEL_HACK along with include/asm-generic/5level-fixup.h.
>
> The changes are mostly about mechanical r
From: Mike Rapoport
There are no architectures that use include/asm-generic/5level-fixup.h
therefore it can be removed along with __ARCH_HAS_5LEVEL_HACK define and
the code it surrounds
Signed-off-by: Mike Rapoport
---
include/asm-generic/5level-fixup.h | 58 --
inc
From: Mike Rapoport
No architecture defines __ARCH_USE_5LEVEL_HACK and therefore
pgtable-nop4d-hack.h will be never actually included.
Remove it.
Signed-off-by: Mike Rapoport
---
include/asm-generic/pgtable-nop4d-hack.h | 64
include/asm-generic/pgtable-nopud.h |
From: Mike Rapoport
The unicore32 architecture has 2 level page tables and
asm-generic/pgtable-nopmd.h and explicit casts from pud_t to pgd_t for page
table folding.
Add p4d walk in the only place that actually unfolds the pud level and
remove __ARCH_USE_5LEVEL_HACK.
Signed-off-by: Mike Rapopor
From: Mike Rapoport
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate and remove usage of __ARCH_USE_5LEVEL_HACK.
Signed-off-by: Mike Rapoport
---
arch/sh/include/asm/pgtable-2level.h | 1 -
arch/sh/include/asm/pgtable-3level.h | 1 -
arch/sh/
From: Mike Rapoport
The __pXd_offset() macros are identical to the pXd_index() macros and there
is no point to keep both of them. All architectures define and use
pXd_index() so let's keep only those to make mips consistent with the rest
of the kernel.
Signed-off-by: Mike Rapoport
---
arch/sh/
From: Geert Uytterhoeven
- Convert from printk() to pr_*(),
- Add missing continuations,
- Use "%llx" to format u64,
- Join multiple prints in show_fault_oops() into a single print.
Signed-off-by: Geert Uytterhoeven
Signed-off-by: Mike Rapoport
---
arch/sh/mm/fault.c | 39
From: Mike Rapoport
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate and replace 5level-fixup.h with pgtable-nop4d.h.
Signed-off-by: Mike Rapoport
Tested-by: Christophe Leroy # 8xx and 83xx
---
arch/powerpc/include/asm/book3s/32/pgtable.h |
From: Mike Rapoport
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate and remove usage of __ARCH_USE_5LEVEL_HACK.
Signed-off-by: Mike Rapoport
---
arch/openrisc/include/asm/pgtable.h | 1 -
arch/openrisc/mm/fault.c| 10 --
a
From: Mike Rapoport
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate and remove usage of __ARCH_USE_5LEVEL_HACK.
Signed-off-by: Mike Rapoport
---
arch/nios2/include/asm/pgtable.h | 3 +--
arch/nios2/mm/fault.c| 9 +++--
arch/nio
From: Mike Rapoport
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate, remove usage of __ARCH_USE_5LEVEL_HACK and replace
5level-fixup.h with pgtable-nop4d.h
Signed-off-by: Mike Rapoport
---
arch/ia64/include/asm/pgalloc.h | 4 ++--
arch/ia64/i
From: Mike Rapoport
The hexagon architecture has 2 level page tables and as such most of the
page table folding is already implemented in asm-generic/pgtable-nopmd.h.
Fixup the only place in arch/hexagon to unfold the p4d level and remove
__ARCH_USE_5LEVEL_HACK.
Signed-off-by: Mike Rapoport
--
From: Mike Rapoport
h8300 is a nommu architecture and does not require fixup for upper layers
of the page tables because it is already handled by the generic nommu
implementation.
Remove definition of __ARCH_USE_5LEVEL_HACK in
arch/h8300/include/asm/pgtable.h
Signed-off-by: Mike Rapoport
---
From: Mike Rapoport
Implement primitives necessary for the 4th level folding, add walks of p4d
level where appropriate, replace 5level-fixup.h with pgtable-nop4d.h and
remove __ARCH_USE_5LEVEL_HACK.
Since arm and arm64 share kvm memory management bits, make the conversion
for both variants at on
From: Mike Rapoport
Hi,
These patches convert several architectures to use page table folding and
remove __ARCH_HAS_5LEVEL_HACK along with include/asm-generic/5level-fixup.h.
The changes are mostly about mechanical replacement of pgd accessors with p4d
ones and the addition of higher levels to
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