On Tue, 2020-04-07 at 08:47:39 UTC, "Gautham R. Shenoy" wrote:
> From: "Gautham R. Shenoy"
>
> Currently prior to entering an idle state on a Linux Guest, the
> pseries cpuidle driver implement an idle_loop_prolog() and
> idle_loop_epilog() functions which ensure that idle_purr is correctly
> com
On Wed, 2020-04-29 at 10:00:48 UTC, Xiongfeng Wang wrote:
> Move the static keyword to the front of declaration of 'vuart_bus_priv',
> and resolve the following compiler warning that can be seen when
> building with warnings enabled (W=1):
>
> drivers/ps3/ps3-vuart.c:867:1: warning: âstaticâ i
Segher Boessenkool writes:
> On Tue, May 05, 2020 at 05:40:21PM +0200, Christophe Leroy wrote:
>> >>+#define __put_user_asm_goto(x, addr, label, op) \
>> >>+ asm volatile goto( \
>> >>+ "1: " op "%U1%X1 %0,%1 # put_user\n"
Segher Boessenkool writes:
> Hi!
>
> On Wed, May 06, 2020 at 12:27:58AM +1000, Michael Ellerman wrote:
>> Christophe Leroy writes:
>> > unsafe_put_user() is designed to take benefit of 'asm goto'.
>> >
>> > Instead of using the standard __put_u
Christophe Leroy writes:
> unsafe_put_user() is designed to take benefit of 'asm goto'.
>
> Instead of using the standard __put_user() approach and branch
> based on the returned error, use 'asm goto' and make the
> exception code branch directly to the error label. There is
> no code anymore in t
Will Deacon writes:
> On Mon, May 04, 2020 at 09:11:12AM +0200, Geert Uytterhoeven wrote:
>> On Mon, Mar 30, 2020 at 1:42 PM Amit Daniel Kachhap
>> wrote:
>> > This option can be used in Kconfig files to compare the ld version
>> > and enable/disable incompatible config options if required.
>> >
kajoljain writes:
> On 4/29/20 5:07 PM, Michael Ellerman wrote:
>> Kajol Jain writes:
>>> Function 'read_sys_info_pseries()' is added to get system parameter
>>> values like number of sockets and chips per socket.
>>> and it gets these details via r
Wolfram Sang writes:
> My 'pengutronix' address is defunct for years. Merge the entries and use
> the proper contact address.
Is there any point adding the new address? It's just likely to bit-rot
one day too.
I figure the git history is a better source for more up-to-date emails.
cheers
> dif
ions=1000
> cryptomgr.panic_on_fail=1"
Thanks for testing.
I gave it a quick spin on a Power9 and it showed no issues.
Acked-by: Michael Ellerman (powerpc)
cheers
ira.we...@intel.com writes:
> From: Ira Weiny
>
> The kmap infrastructure has been copied almost verbatim to every architecture.
> This series consolidates obvious duplicated code by defining core functions
> which call into the architectures only when needed.
>
> Some of the k[un]map_atomic() imp
Gautham R Shenoy writes:
> On Mon, Apr 20, 2020 at 03:46:35PM -0700, Tyrel Datwyler wrote:
>> On 4/7/20 1:47 AM, Gautham R. Shenoy wrote:
>> > From: "Gautham R. Shenoy"
>> >
>> > Hi,
>> >
>> > This is the fifth version of the patches to track and expose idle PURR
>> > and SPURR ticks. These pat
Christoph Hellwig writes:
> On Tue, Apr 28, 2020 at 09:48:11PM +1000, Michael Ellerman wrote:
>>
>> This comes from fcheck_files() via fcheck().
>>
>> It's pretty clearly documented that fcheck() must be wrapped with
>> rcu_read_lock(), so fix it.
>
&
Kajol Jain writes:
> Function 'read_sys_info_pseries()' is added to get system parameter
> values like number of sockets and chips per socket.
> and it gets these details via rtas_call with token
> "PROCESSOR_MODULE_INFO".
>
> Incase lpar migrate from one system to another, system
> parameter deta
Michael Ellerman writes:
> Kajol Jain writes:
>> To expose the system dependent parameter like total number of
>> sockets and numbers of chips per socket, patch adds two sysfs files.
>> "sockets" and "chips" are added to /sys/devices/hv_24x7/interface/
Kajol Jain writes:
> To expose the system dependent parameter like total number of
> sockets and numbers of chips per socket, patch adds two sysfs files.
> "sockets" and "chips" are added to /sys/devices/hv_24x7/interface/
> of the "hv_24x7" pmu.
>
> Signed-off-by: Kajol Jain
> ---
> arch/powerp
Hi Kajol,
Some comments inline ...
Kajol Jain writes:
> For hv_24x7 socket/chip level events, specific chip-id to which
> the data requested should be added as part of pmu events.
> But number of chips/socket in the system details are not exposed.
>
> Patch implements read_sys_info_pseries() to
/0xd88
.do_notify_resume+0x158/0x3c8
.interrupt_exit_user_prepare+0x19c/0x208
interrupt_return+0x14/0x1c0
This comes from fcheck_files() via fcheck().
It's pretty clearly documented that fcheck() must be wrapped with
rcu_read_lock(), so fix it.
Signed-off-by: Michael Ellerman
---
Christian Brauner writes:
> On Thu, Oct 17, 2019 at 09:00:48AM +1100, Michael Ellerman wrote:
>> Christian Brauner writes:
>> > On Wed, Oct 16, 2019 at 11:27:32PM +1100, Michael Ellerman wrote:
>> >> On a machine with a 64K PAGE_SIZE, the nested for loops in
>&
Nayna Jain writes:
> diff --git a/arch/powerpc/kernel/secure_boot.c
> b/arch/powerpc/kernel/secure_boot.c
> index 99bba7915629..9753470ab08a 100644
> --- a/arch/powerpc/kernel/secure_boot.c
> +++ b/arch/powerpc/kernel/secure_boot.c
> @@ -28,3 +39,16 @@ bool is_ppc_secureboot_enabled(void)
>
On Mon, 2019-10-14 at 16:51:28 UTC, Christophe Leroy wrote:
> Make sure starting addr is aligned to segment boundary so that when
> incrementing the segment, the starting address of the new segment is
> below the end address. Otherwise the last segment might get missed.
>
> Fixes: a68c31fc01ef ("
Christian Brauner writes:
> On Wed, Oct 16, 2019 at 11:27:32PM +1100, Michael Ellerman wrote:
>> On a machine with a 64K PAGE_SIZE, the nested for loops in
>> test_check_nonzero_user() can lead to soft lockups, eg:
>>
>> watchdog: BUG: soft lockup - CPU#4 s
Christian Brauner writes:
> On Fri, Oct 11, 2019 at 02:48:10PM +1100, Aleksa Sarai wrote:
>> On 2019-10-11, Michael Ellerman wrote:
>> > On a machine with a 64K PAGE_SIZE, the nested for loops in
>> > test_check_nonzero_user() can lead to soft lockups, eg:
>> >
: f5a1a536fa14 ("lib: introduce copy_struct_from_user() helper")
Suggested-by: Aleksa Sarai
Signed-off-by: Michael Ellerman
---
lib/test_user_copy.c | 22 +++---
1 file changed, 19 insertions(+), 3 deletions(-)
v2: Rework calculation to just use PAGE_SIZE directly.
R
Christophe Leroy writes:
> Le 15/10/2019 à 21:17, Sebastian Andrzej Siewior a écrit :
>> From: Thomas Gleixner
>>
>> CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by CONFIG_PREEMPT_RT.
>> Both PREEMPT and PREEMPT_RT require the same functionality which today
>> depends on CONFIG_PREEMPT.
>
Hi Shuah,
I know this has been merged already, so this is just FYI and in case it
helps anyone else who's tracking down build failures.
Sorry I didn't reply before you merged it, I was on leave.
Shuah Khan writes:
> Add kselftest-all target to build tests from the top level
> Makefile. This is
Linus Torvalds writes:
> On Sun, Oct 13, 2019 at 12:59 PM Al Viro wrote:
>> Re plotting: how strongly would you object against passing the range to
>> user_access_end()? Powerpc folks have a very close analogue of stac/clac,
>> currently buried inside their __get_user()/__put_user()/etc. - the s
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Hi Linus,
Please pull some more powerpc fixes for 5.4:
The following changes since commit da0c9ea146cbe92b832f1b0f694840ea8eb33cce:
Linux 5.4-rc2 (2019-10-06 14:27:30 -0700)
are available in the git repository at:
https://git.kernel.org/pub/
Aleksa Sarai writes:
> On 2019-10-11, Michael Ellerman wrote:
>> On a machine with a 64K PAGE_SIZE, the nested for loops in
>> test_check_nonzero_user() can lead to soft lockups, eg:
...
>> diff --git a/lib/test_user_copy.c b/lib/test_user_copy.c
>> index 950ee8
On Mon, 2019-09-30 at 00:13:42 UTC, Stephen Rothwell wrote:
> Hi all,
>
> After merging the powerpc tree, today's linux-next build (powerpc64
> allnoconfig) failed like this:
>
> arch/powerpc/mm/book3s64/pgtable.c: In function 'flush_partition':
> arch/powerpc/mm/book3s64/pgtable.c:216:3: error:
On Tue, 2019-10-01 at 13:29:28 UTC, Laurent Dufour wrote:
> Since the commit 1211ee61b4a8 ("powerpc/pseries: Read TLB Block Invalidate
> Characteristics"), a warning message is displayed when booting a guest on
> top of KVM:
>
> lpar: arch/powerpc/platforms/pseries/lpar.c
> pseries_lpar_read_hblk
: f5a1a536fa14 ("lib: introduce copy_struct_from_user() helper")
Suggested-by: Aleksa Sarai
Signed-off-by: Michael Ellerman
---
lib/test_user_copy.c | 23 ---
1 file changed, 20 insertions(+), 3 deletions(-)
How does this look? It runs in < 1s on my machine here.
cheers
Hi Aleksa,
Aleksa Sarai writes:
> A common pattern for syscall extensions is increasing the size of a
> struct passed from userspace, such that the zero-value of the new fields
> result in the old kernel behaviour (allowing for a mix of userspace and
> kernel vintages to operate on one another in
On Mon, 2019-09-30 at 00:13:42 UTC, Stephen Rothwell wrote:
> Hi all,
>
> After merging the powerpc tree, today's linux-next build (powerpc64
> allnoconfig) failed like this:
>
> arch/powerpc/mm/book3s64/pgtable.c: In function 'flush_partition':
> arch/powerpc/mm/book3s64/pgtable.c:216:3: error:
On Tue, 2019-10-01 at 13:29:28 UTC, Laurent Dufour wrote:
> Since the commit 1211ee61b4a8 ("powerpc/pseries: Read TLB Block Invalidate
> Characteristics"), a warning message is displayed when booting a guest on
> top of KVM:
>
> lpar: arch/powerpc/platforms/pseries/lpar.c
> pseries_lpar_read_hblk
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Hi Linus,
Please pull some more powerpc updates for 5.4:
The following changes since commit 45824fc0da6e46cc5d563105e1eaaf3098a686f9:
Merge tag 'powerpc-5.4-1' of
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux (2019-09-20
11:48:06
e_set_active()
>were
>>> called with __pa(page_address()) for now, I assume we can simply
>switch
>>> to page_to_phys() here. The pfn_to_kaddr() handling is now mostly
>gone.
>>>
>>> Cc: Benjamin Herrenschmidt
>>> Cc: Paul Mackerras
>&g
On Fri, 2019-09-20 at 13:05:22 UTC, Laurent Dufour wrote:
> The PAPR document specifies the TLB Block Invalidate Characteristics which
> tells for each pair of segment base page size, actual page size, the size
> of the block the hcall H_BLOCK_REMOVE supports.
>
> These characteristics are loaded
On Wed, 2019-08-21 at 10:20:00 UTC, Christophe Leroy wrote:
> In a couple of places there is a need to select whether read-only
> protection of shadow pages is performed with PAGE_KERNEL_RO or with
> PAGE_READONLY.
>
> Add a helper to avoid duplicating the choice.
>
> Signed-off-by: Christophe Le
r 2
>> > >
>> > > [1] https://patchwork.kernel.org/patch/11133445/
>> > > [2]
>https://raw.githubusercontent.com/cailca/linux-mm/master/powerpc.config
>> >
>> > Sorry for breaking the build. How about?
>>
>> It works fine.
>
&g
xiwell S. Garcia (1):
Documentation/powerpc: Add ELF note documentation
Michael Anderson (1):
powerpc/mm: Use UV_WRITE_PATE ucall to register a PATE
Michael Ellerman (11):
Merge branch 'fixes' into next
Merge branch 'topic/ppc-kvm' into next
Merge bra
On Tue, 2019-09-10 at 13:15:13 UTC, Ravi Bangoria wrote:
> If watchpoint exception is generated by larx/stcx instructions, the
> reservation created by larx gets lost while handling exception, and
> thus stcx instruction always fails. Generally these instructions are
> used in a while(1) loop, for
On Thu, 2019-09-05 at 18:20:28 UTC, "Naveen N. Rao" wrote:
> This ensures that we use the right address on architectures that use
> function descriptors.
>
> Signed-off-by: Naveen N. Rao
Series applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/a3db31ff6ce31f5a544a66b61613a098029
On Wed, 2019-09-11 at 15:52:18 UTC, Greg Kurz wrote:
> There's a bug in skiboot that causes the OPAL_XIVE_ALLOCATE_IRQ call
> to return the 32-bit value 0x when OPAL has run out of IRQs.
> Unfortunatelty, OPAL return values are signed 64-bit entities and
> errors are supposed to be negative
On Thu, 2019-09-12 at 07:40:37 UTC, Masahiro Yamada wrote:
> This slightly improves the prom_init_check rule.
>
> [1] Avoid needless check
>
> Currently, prom_init_check.sh is invoked every time you run 'make'
> even if you have changed nothing in prom_init.c. With this commit,
> the script is re
On Fri, 2019-08-23 at 14:22:00 UTC, Qian Cai wrote:
> Booting a POWER9 PowerNV system generates a few messages below with
> "ptrval" due to the pointers printed without a specifier
> extension (i.e unadorned %p) are hashed to prevent leaking information
> about the kernel memory layout.
>
Hi Oleg,
Thanks for the patch.
Oleg Nesterov writes:
> I don't have a ppc machine, this patch wasn't even compile tested,
> could you please review?
>
> The commit a8a4b03ab95f ("powerpc: Hard wire PT_SOFTE value to 1 in
> ptrace & signals") changed ptrace_get_reg(PT_SOFTE) to report 0x1,
> but
"Alastair D'Silva" writes:
> From: Alastair D'Silva
>
> When calling flush_icache_range with a size >4GB, we were masking
> off the upper 32 bits, so we would incorrectly flush a range smaller
> than intended.
>
> __kernel_sync_dicache in the 64 bit VDSO has the same bug.
Please fix that in a se
Hi Laurent,
Few comments ...
Laurent Dufour writes:
> Now we do not call _BLOCK_REMOVE all the time when the feature is
> exhibited.
This isn't true until after the patch is applied, ie. the tense is
wrong. The rest of the change log explains things fine, so just drop
that sentence I think.
Ca
Hi Laurent,
Comments below ...
Laurent Dufour writes:
> The PAPR document specifies the TLB Block Invalidate Characteristics which
> tells for each couple segment base page size, actual page size, the size of
^
"pair of" again
> the block the hcall H_BLOCK_REMO
Hi Laurent,
Thanks for fixing this, just a few comments.
Laurent Dufour writes:
> Since the commit ba2dd8a26baa ("powerpc/pseries/mm: call H_BLOCK_REMOVE"),
> the call to H_BLOCK_REMOVE is always done if the feature is exhibited.
>
> However, the hypervisor may not support all the block size for
"Naveen N. Rao" writes:
> Michael Ellerman wrote:
>> "Gautham R. Shenoy" writes:
>>> From: "Gautham R. Shenoy"
>>>
>>> Currently on Pseries Linux Guests, the offlined CPU can be put to one
>>> of the followi
Hi Christophe,
Sorry I'm late replying to this.
Christophe Leroy writes:
> Commit 18ad51dd342a ("powerpc: Add VDSO version of getcpu") added
> getcpu() for PPC64 only, by making use of a user readable general
> purpose SPR.
>
> PPC32 doesn't have any such SPR, a full system call can still be
> a
Michal Suchánek writes:
> On Tue, 03 Sep 2019 10:00:57 +1000
> Michael Ellerman wrote:
>> Michal Suchánek writes:
>> > On Mon, 02 Sep 2019 12:03:12 +1000
>> > Michael Ellerman wrote:
>> >
>> >> Michal Suchanek writes:
>> >>
Nathan Lynch writes:
> Gautham R Shenoy writes:
>> On Thu, Sep 12, 2019 at 10:39:45AM -0500, Nathan Lynch wrote:
>>> "Gautham R. Shenoy" writes:
>>> > The patchset also defines a new sysfs attribute
>>> > "/sys/device/system/cpu/cede_offline_enabled" on PSeries Linux guests
>>> > to allow usersp
"Gautham R. Shenoy" writes:
> From: "Gautham R. Shenoy"
>
> Currently on Pseries Linux Guests, the offlined CPU can be put to one
> of the following two states:
>- Long term processor cede (also called extended cede)
>- Returned to the Hypervisor via RTAS "stop-self" call.
>
> This is con
Hi Greg,
Couple of comments ...
Greg Kurz writes:
> There's a bug in skiboot that causes the OPAL_XIVE_ALLOCATE_IRQ call
> to return the 32-bit value 0x when OPAL has run out of IRQs.
> Unfortunatelty, OPAL return values are signed 64-bit entities and
> errors are supposed to be negative
Nathan Chancellor writes:
> On Wed, Sep 04, 2019 at 08:01:35AM -0500, Segher Boessenkool wrote:
>> On Wed, Sep 04, 2019 at 08:16:45AM +, David Laight wrote:
>> > From: Nathan Chancellor [mailto:natechancel...@gmail.com]
>> > > Fair enough so I guess we are back to just outright disabling the
>
Hi Qian,
Sorry I haven't replied sooner, I've been travelling.
Qian Cai writes:
> The commit 108c14858b9e ("locking/lockdep: Add support for dynamic
> keys") introduced a boot warning on powerpc below, because since the
> commit 2d4f567103ff ("KVM: PPC: Introduce kvm_tmp framework") adds
> kvm_t
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Hi Linus,
Please pull some more powerpc fixes for 5.3:
The following changes since commit ed4289e8b48845888ee46377bd2b55884a55e60b:
Revert "powerpc: slightly improve cache helpers" (2019-07-31 22:56:27 +1000)
are available in the git repository
Thiago Jung Bauermann writes:
> Michael Ellerman writes:
>> On Tue, 2019-08-20 at 02:13:12 UTC, Thiago Jung Bauermann wrote:
>>> Introduce CONFIG_PPC_SVM to control support for secure guests and include
>>> Ultravisor-related helpers when it is selected
>>
Bart Van Assche writes:
> On 8/30/19 2:13 PM, Qian Cai wrote:
>> https://raw.githubusercontent.com/cailca/linux-mm/master/powerpc.config
>>
>> Once in a while, booting an IBM POWER9 PowerNV system (8335-GTH) would
>> generate
>> a warning in lockdep_register_key() at,
>>
>> if (WARN_ON_ONCE(sta
Christophe Leroy writes:
> Le 03/09/2019 à 07:23, Alastair D'Silva a écrit :
>> From: Alastair D'Silva
>>
>> Similar to commit 22e9c88d486a
>> ("powerpc/64: reuse PPC32 static inline flush_dcache_range()")
>> this patch converts the following ASM symbols to C:
>> flush_icache_range()
>>
Michal Suchánek writes:
> On Mon, 02 Sep 2019 12:03:12 +1000
> Michael Ellerman wrote:
>
>> Michal Suchanek writes:
>> > On bigendian ppc64 it is common to have 32bit legacy binaries but much
>> > less so on littleendian.
>>
>> I think the toolc
Segher Boessenkool writes:
> On Mon, Sep 02, 2019 at 12:03:12PM +1000, Michael Ellerman wrote:
>> Michal Suchanek writes:
>> > On bigendian ppc64 it is common to have 32bit legacy binaries but much
>> > less so on littleendian.
>>
>> I think the toolchai
Michal Suchánek writes:
> On Mon, 02 Sep 2019 14:01:17 +1000
> Michael Ellerman wrote:
>> Michael Ellerman writes:
>> > Michal Suchanek writes:
>> ...
>> >> @@ -295,6 +279,12 @@ static inline int current_is_64bit(void)
>> >> }
>>
Hi Nayna,
Some more comments below.
Nayna Jain writes:
> POWER secure boot relies on the kernel IMA security subsystem to
> perform the OS kernel image signature verification.
Again this is just a design choice we've made, it's not specified
anywhere or anything like that. And it only applies t
Hi Nayna,
Sorry I've taken so long to get to this series, there's just too many
patches that need reviewing :/
Nayna Jain writes:
> Secure boot on POWER defines different IMA policies based on the secure
> boot state of the system.
The terminology throughout is a bit vague, we have POWER, Power
Catalin Marinas writes:
> On Mon, Sep 02, 2019 at 11:44:43AM +1000, Michael Ellerman wrote:
>> Stephen Rothwell writes:
>> > Hi all,
>> >
>> > Today's linux-next merge of the powerpc tree got a conflict in:
>> >
>> > arch/Kconfig
>
Michael Ellerman writes:
> Michal Suchanek writes:
...
>> @@ -295,6 +279,12 @@ static inline int current_is_64bit(void)
>> }
>>
>> #else /* CONFIG_PPC64 */
>> +static int read_user_stack_slow(void __user *ptr, void *buf, int nb)
>> +{
>> +
Michal Suchanek writes:
> There are two almost identical copies for 32bit and 64bit.
>
> The function is used only in 32bit code which will be split out in next
> patch so consolidate to one function.
>
> Signed-off-by: Michal Suchanek
> Reviewed-by: Christophe Leroy
> ---
> new patch in v6
> -
On Mon, 2019-08-26 at 15:52:13 UTC, Christophe Leroy wrote:
> Powerpc 601 is rather old powerpc which as some important
> limitations compared to other book3s/32 powerpcs:
> - No Timebase.
> - Common BATs for instruction and data.
> - No execution protection in segment registers.
> - No RI bit in M
On Tue, 2019-08-20 at 02:13:12 UTC, Thiago Jung Bauermann wrote:
> Introduce CONFIG_PPC_SVM to control support for secure guests and include
> Ultravisor-related helpers when it is selected
>
> Signed-off-by: Thiago Jung Bauermann
Patch 2-14 & 16 applied to powerpc next, thanks.
https://git.ker
On Wed, 2019-08-21 at 20:00:34 UTC, Christophe Leroy wrote:
> The code which fixups the DAR on TLB errors for dbcX instructions
> has a self-modifying code alternative that has never been used.
>
> Drop it.
>
> Signed-off-by: Christophe Leroy
Applied to powerpc next, thanks.
https://git.kernel
On Wed, 2019-08-21 at 10:20:51 UTC, Christophe Leroy wrote:
> Today, the STACK_END_MAGIC is set on init_stack in start_kernel().
>
> To avoid a false 'Thread overran stack, or stack corrupted' message
> on early Oopses, setup STACK_END_MAGIC as soon as possible.
>
> Signed-off-by: Christophe Lero
On Mon, 2019-08-26 at 11:10:23 UTC, Christophe Leroy wrote:
> Prior to commit 1bd98d7fbaf5 ("ppc64: Update BUG handling based on
> ppc32"), BUG() family was using BUG_ILLEGAL_INSTRUCTION which
> was an invalid instruction opcode to trap into program check
> exception.
>
> That commit converted the
On Thu, 2019-08-29 at 15:50:20 UTC, "Maxiwell S. Garcia" wrote:
> From: Claudio Carvalho
>
> Add the PowerPC name and the PPC_ELFNOTE_CAPABILITIES type in the
> kernel binary ELF note. This type is a bitmap that can be used to
> advertise kernel capabilities to userland.
>
> This patch also defi
Michal Suchánek writes:
> On Fri, 30 Aug 2019 20:57:57 +0200
> Michal Suchanek wrote:
>
>> Building callchain.c with !COMPAT proved quite ugly with all the
>> defines. Splitting out the 32bit and 64bit parts looks better.
>>
>
> BTW the powerpc callchain.c does not match any of the patterns of P
Michal Suchanek writes:
> On bigendian ppc64 it is common to have 32bit legacy binaries but much
> less so on littleendian.
I think the toolchain people will tell you that there is no 32-bit
little endian ABI defined at all, if anything works it's by accident.
So I think we should not make this
"Alastair D'Silva" writes:
> On Wed, 2019-08-21 at 22:27 +0200, Christophe Leroy wrote:
>>
>> Le 20/08/2019 à 06:36, Alastair D'Silva a écrit :
>> > On Fri, 2019-08-16 at 15:52 +, Christophe Leroy wrote:
>>
>> [...]
>>
>> >
>> > Thanks Christophe,
>> >
>> > I'm trying a somewhat different
Stephen Rothwell writes:
> Hi all,
>
> Today's linux-next merge of the powerpc tree got a conflict in:
>
> arch/Kconfig
>
> between commit:
>
> 5cf896fb6be3 ("arm64: Add support for relocating the kernel with RELR
> relocations")
>
> from the arm64 tree and commit:
>
> 0c9c1d563975 ("x86, s
Christophe Leroy writes:
> DSISR has a bit to tell if the fault is due to a read or a write.
Except some CPUs don't have a DSISR?
Which is why we have page_fault_is_write() that's used in
__do_page_fault().
Or is that old cruft?
I see eg. in head_40x.S we pass r5=0 for error code, and we don't
Christophe Leroy writes:
> Most 8xx registers have specific names, so just include
> reg_8xx.h all the time in reg.h in order to have them defined
> even when CONFIG_PPC_8xx is not selected. This will avoid
> the need for #ifdefs in C code.
>
> Guard SPRN_ICTRL in an #ifdef CONFIG_PPC_8xx as this
Nathan Chancellor writes:
> Commit aea447141c7e ("powerpc: Disable -Wbuiltin-requires-header when
> setjmp is used") disabled -Wbuiltin-requires-header because of a warning
> about the setjmp and longjmp declarations.
>
> r367387 in clang added another diagnostic around this, complaining that
> t
Scott Wood writes:
> On Tue, 2019-08-27 at 11:33 +1000, Michael Ellerman wrote:
>> Jason Yan writes:
>> > A polite ping :)
>> >
>> > What else should I do now?
>>
>> That's a good question.
>>
>> Scott, are you still maintaini
On Tue, 2019-08-20 at 14:07:09 UTC, Christophe Leroy wrote:
> From: Christoph Hellwig
>
> The on chip memory allocator is entirely unused in the kernel tree.
>
> Signed-off-by: Christoph Hellwig
> Acked-by: Christophe Leroy
> Signed-off-by: Christophe Leroy
Series applied to powerpc next, th
On Thu, 2019-08-22 at 16:44:05 UTC, Christophe Leroy wrote:
> Book3E doesn't have SPRN_SPURR/SPRN_PURR.
>
> Activating ARCH_HAS_SCALED_CPUTIME is just wasting CPU time.
>
> Signed-off-by: Christophe Leroy
> Link: https://github.com/linuxppc/issues/issues/171
Applied to powerpc next, thanks.
ht
On Tue, 2019-08-20 at 14:34:12 UTC, Christophe Leroy wrote:
> Today LOAD_REG_IMMEDIATE() is a basic #define which loads all
> parts on a value into a register, including the parts that are NUL.
>
> This means always 2 instructions on PPC32 and always 5 instructions
> on PPC64. And those instructio
On Sat, 2019-07-13 at 03:21:06 UTC, Masahiro Yamada wrote:
> The KBUILD_ARFLAGS addition in arch/powerpc/Makefile has never worked
> in a useful way because it is always overridden by the following code
> in the top Makefile:
>
> # use the deterministic mode of AR if available
> KBUILD_ARFLAGS
Christophe Leroy writes:
> Le 26/08/2019 à 13:41, Michael Ellerman a écrit :
>> Christophe Leroy writes:
>>> sched_clock(), used by printk(), calls __USE_RTC() to know
>>> whether to use realtime clock or timebase.
>>>
>>> __USE_RTC() u
Benjamin Herrenschmidt writes:
> On Mon, 2019-08-26 at 21:41 +1000, Michael Ellerman wrote:
>> Christophe Leroy writes:
>> > sched_clock(), used by printk(), calls __USE_RTC() to know
>> > whether to use realtime clock or timebase.
>> >
>> >
maller
> than intended.
>
> This patch replaces the 32 bit shifts with 64 bit ones, so that
> the full size is accounted for.
>
> Changelog:
> v2
> - Add related upstream commit
>
> Signed-off-by: Alastair D'Silva
> ---
> arch/powerpc/kernel/misc_64.S | 4
Jason Yan writes:
> A polite ping :)
>
> What else should I do now?
That's a good question.
Scott, are you still maintaining FSL bits, and if so any comments? Or
should I take this.
cheers
> On 2019/8/19 14:12, Jason Yan wrote:
>> Hi Michael,
>>
>> Is there anything more I should do to get th
Christophe Leroy writes:
> sched_clock(), used by printk(), calls __USE_RTC() to know
> whether to use realtime clock or timebase.
>
> __USE_RTC() uses cpu_has_feature() which is initialised by
> machine_init(). Before machine_init(), __USE_RTC() returns true,
> leading to a program check exceptio
On Wed, 2019-08-14 at 09:25:52 UTC, Christophe Leroy wrote:
> CC kernel/futex.o
> kernel/futex.c: In function 'do_futex':
> kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this
> function [-Wmaybe-uninitialized]
>return oldval == cmparg;
> ^
> kerne
On Wed, 2019-08-14 at 12:36:09 UTC, Christophe Leroy wrote:
> Commit 453d87f6a8ae ("powerpc/mm: Warn if W+X pages found on boot")
> wrongly changed KERN_VIRT_START from 0 to PAGE_OFFSET, leading to a
> shift in the displayed addresses.
>
> Lets revert that change to resync walk_pagetables()'s addr
On Wed, 2019-08-14 at 14:36:10 UTC, Christophe Leroy wrote:
> On the 8xx, the layout displayed at boot is:
>
> [0.00] Memory: 121856K/131072K available (5728K kernel code, 592K
> rwdata, 1248K rodata, 560K init, 448K bss, 9216K reserved, 0K cma-reserved)
> [0.00] Kernel virtual me
On Tue, 2019-08-20 at 08:13:46 UTC, Santosh Sivaraj wrote:
> schedule_work() cannot be called from MCE exception context as MCE can
> interrupt even in interrupt disabled context.
>
> fixes: 733e4a4c ("powerpc/mce: hookup memory_failure for UE errors")
> Reviewed-by: Mahesh Salgaonkar
> Reviewed-
On Fri, 2019-08-16 at 05:41:40 UTC, Christophe Leroy wrote:
> Only BOOK3S and FSL_BOOK3E have a usefull update_mmu_cache().
>
> For the others, just define it static inline.
>
> In the meantime, simplify the FSL_BOOK3E related ifdef as
> book3e_hugetlb_preload() only exists when CONFIG_PPC_FSL_BO
On Mon, 2019-08-19 at 06:40:25 UTC, Christophe Leroy wrote:
> If a page is already mapped RW without the DIRTY flag, the DIRTY
> flag is never set and a TLB store miss exception is taken forever.
>
> This is easily reproduced with the following app:
>
> void main(void)
> {
> volatile char *
On Fri, 2019-08-16 at 07:52:20 UTC, Christophe Leroy wrote:
> copy_page() and clear_page() expect page aligned destination, and
> use dcbz instruction to clear entire cache lines based on the
> assumption that the destination is cache aligned.
>
> As shown during analysis of a bug in BTRFS filesys
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