On Mon, May 06, 2024 at 08:26:03PM GMT, Gautam Menghani wrote:
> PAPR hypervisor has introduced three new counters in the VPA area of
> LPAR CPUs for KVM L2 guest (see [1] for terminology) observability - 2
> for context switches from host to guest and vice versa, and 1 counter
> for getting the to
tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
next
branch HEAD: be140f1732b523947425aaafbe2e37b41b622d96 powerpc/64: Set _IO_BASE
to POISON_POINTER_DELTA not 0 for CONFIG_PCI=n
elapsed time: 923m
configs tested: 181
configs skipped: 4
The following configs hav
On Mon, May 6, 2024 at 5:21 AM Athira Rajeev
wrote:
>
> Add support to capture and parse raw instruction in objdump.
> Currently, the perf tool infrastructure uses "--no-show-raw-insn" option
> with "objdump" while disassemble. Example from powerpc with this option
> for an instruction address is:
On Mon, May 6, 2024 at 5:19 AM Athira Rajeev
wrote:
>
> Fix a comment in function which explains how multi_regs field gets set
> for an instruction. In the example, "mov %rsi, 8(%rbx,%rcx,4)", the
> comment mistakenly referred to "dst_multi_regs = 0". Correct it to use
> "src_multi_regs = 0"
>
>
Hello,
On Mon, May 6, 2024 at 5:19 AM Athira Rajeev
wrote:
>
> The patchset from Namhyung added support for data type profiling
> in perf tool. This enabled support to associate PMU samples to data
> types they refer using DWARF debug information. With the upstream
> perf, currently it possible t
On Mon May 6, 2024 at 5:37 PM AEST, Thomas Huth wrote:
> On 04/05/2024 14.28, Nicholas Piggin wrote:
> > Mark the failing h_cede_tm and spapr_vpa tests as kfail.
> >
> > Signed-off-by: Nicholas Piggin
> > ---
> > powerpc/spapr_vpa.c | 3 ++-
> > powerpc/tm.c| 3 ++-
> > 2 files change
i386 allmodconfig gcc
i386 allnoconfig gcc
i386 allyesconfig gcc
i386 buildonly-randconfig-001-20240506 gcc
i386 buildonly-randconfig-001-20240507 clang
i386 buildonly-randconfig-002-20240506 clang
On Mon May 6, 2024 at 5:03 PM AEST, Thomas Huth wrote:
> On 04/05/2024 14.28, Nicholas Piggin wrote:
> > This adds a few minor fixes.
> >
> > Signed-off-by: Nicholas Piggin
> > ---
> > docs/unittests.txt | 12 +++-
> > 1 file changed, 7 insertions(+), 5 deletions(-)
> >
> > diff --git
Stephen Rothwell writes:
> Hi all,
>
> Today's linux-next merge of the risc-v tree got conflicts in:
>
> include/uapi/linux/prctl.h
> kernel/sys.c
>
> between commit:
>
> 628d701f2de5 ("powerpc/dexcr: Add DEXCR prctl interface")
>
> from the powerpc tree and commit:
>
> 6b9391b581fd ("risc
On Tue, 7 May 2024 02:42:58 +0200 Erhard Furtner wrote:
> And indeed without gem_poll_controller() I don't hit the "WARNING: CPU: 1
> PID: 1 at net/core/netpoll.c:370 netpoll_send_skb+0x1fc/0x20c" and "WARNING:
> CPU: 1 PID: 1 at kernel/locking/irqflag-debug.c:10
> warn_bogus_irq_restore+0x30/0x
On Mon, 6 May 2024 07:26:45 -0700
Jakub Kicinski wrote:
> On Sun, 5 May 2024 23:27:13 +0200 Erhard Furtner wrote:
> > > On Sun, 28 Apr 2024 12:53:06 +0200 Erhard Furtner wrote:
> > > > With netconsole enabled I get this "WARNING: CPU: 1 PID: 1 at
> > > > net/core/netpoll.c:370 netpoll_send_sk
Hi all,
Today's linux-next merge of the risc-v tree got conflicts in:
include/uapi/linux/prctl.h
kernel/sys.c
between commit:
628d701f2de5 ("powerpc/dexcr: Add DEXCR prctl interface")
from the powerpc tree and commit:
6b9391b581fd ("riscv: Include riscv_set_icache_flush_ctx prctl")
f
On Mon, 6 May 2024 14:46:57 +
Christophe Leroy wrote:
> Isn't it safer to provide a fonction rather than a direct access to a
> variable ?
>
> By the way, wouldn't it be more performant to use a static branch (jump
> label) ?
A static branch could work, but the point of this is that if ft
On Mon, 06 May 2024 22:51:45 +1000, Michael Ellerman wrote:
> The 40x platforms & CPUs are old and have been unmaintained for years, and as
> far as we can tell have no users.
>
> Note 44x and 476 are not affected.
>
> Christophe first proposed removing 40x in 2020:
>
> https://lore.kernel.o
On Sun, 5 May 2024 17:25:56 +0300
Mike Rapoport wrote:
> From: "Mike Rapoport (IBM)"
>
> Dynamic ftrace must allocate memory for code and this was impossible
> without CONFIG_MODULES.
>
> With execmem separated from the modules code, execmem_text_alloc() is
> available regardless of CONFIG_MO
On Sun, 5 May 2024 17:25:49 +0300
Mike Rapoport wrote:
> diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
> index 70139d9d2e01..c8ddb7abda7c 100644
> --- a/arch/x86/kernel/ftrace.c
> +++ b/arch/x86/kernel/ftrace.c
> @@ -25,6 +25,7 @@
> #include
> #include
> #include
> +#inc
On Sat, May 04, 2024 at 12:33:53AM +0530, Shivaprasad G Bhat wrote:
> We have legacy workloads using VFIO in userspace/kvm guests running
> on downstream distro kernels. We want these workloads to be able to
> continue running on our arch.
It has been broken since 2018, I don't find this reasoning
On Tue, Apr 23, 2024 at 1:19 AM Sathvika Vasireddy
wrote:
>
> Hi Masahiro, thanks for reviewing.
>
> On 4/22/24 5:39 PM, Masahiro Yamada wrote:
>
> On Mon, Apr 22, 2024 at 6:25 PM Sathvika Vasireddy wrote:
>
> Currently, when objtool is enabled and none of the supported options
> are triggered, k
On Mon, Apr 22, 2024 at 6:25 PM Sathvika Vasireddy wrote:
>
> Implement build-time fixup of alternate feature relative addresses for
> the out-of-line (else) patch code. Initial posting to achieve the same
> using another tool can be found at [1]. Idea is to implement this using
> objtool instead
Take a spinlock on state of an IRQ instead of an entire ICS. This
improves scalability by reducing contention.
Signed-off-by: Gautam Menghani
---
arch/powerpc/kvm/book3s_hv_rm_xics.c | 8 ++---
arch/powerpc/kvm/book3s_xics.c | 44
arch/powerpc/kvm/book3s_xics.
Given a server number, kvmppc_xics_find_server() does a linear search
over the vcpus of a VM. Optimize this logic by using an array to
maintain the mapping between server number -> icp.
Signed-off-by: Gautam Menghani
---
arch/powerpc/kvm/book3s_xics.c | 4 ++--
arch/powerpc/kvm/book3s_xics.h |
When an irq is to be resent, all 1024 irqs in an ICS are scanned and the
irqs having 'resend' flag set are resent. Optimize this flow using bitmap
array to speed up the resends.
Signed-off-by: Gautam Menghani
---
arch/powerpc/kvm/book3s_xics.c | 22 +++---
arch/powerpc/kvm/book3s
Optimize the XICS emulation code in KVM as per the 'performance todos'
in the comments of book3s_xics.c.
Performance numbers:
1. Test case: Pgbench run in a KVM on PowerVM guest for 120 secs
2. Time taken by arch_send_call_function_single_ipi() currently measured
with funclatency [1].
$ ./fun
PAPR hypervisor has introduced three new counters in the VPA area of
LPAR CPUs for KVM L2 guest (see [1] for terminology) observability - 2
for context switches from host to guest and vice versa, and 1 counter
for getting the total time spent inside the KVM guest. Add a tracepoint
that enables read
Le 01/05/2024 à 18:29, Stephen Brennan a écrit :
> If an error happens in ftrace, ftrace_kill() will prevent disarming
> kprobes. Eventually, the ftrace_ops associated with the kprobes will be
> freed, yet the kprobes will still be active, and when triggered, they
> will use the freed memory, lik
On Fri, 3 May 2024, Bjorn Helgaas wrote:
> On Fri, Apr 12, 2024 at 04:36:34PM +0300, Ilpo Järvinen wrote:
> > pcie_read_tlp_log() handles only 4 TLP Header Log DWORDs but TLP Prefix
> > Log (PCIe r6.1 secs 7.8.4.12 & 7.9.14.13) may also be present.
> >
> > Generalize pcie_read_tlp_log() and struc
On Sun, 5 May 2024 23:27:13 +0200 Erhard Furtner wrote:
> > On Sun, 28 Apr 2024 12:53:06 +0200 Erhard Furtner wrote:
> > > With netconsole enabled I get this "WARNING: CPU: 1 PID: 1 at
> > > net/core/netpoll.c:370 netpoll_send_skb+0x1fc/0x20c" and "WARNING:
> > > CPU: 1 PID: 1 at kernel/locking/i
From: Christophe Leroy
Only 44x uses 4xx now, so only keep one directory.
Signed-off-by: Christophe Leroy
Signed-off-by: Michael Ellerman
---
arch/powerpc/platforms/44x/Makefile | 6 -
arch/powerpc/platforms/{4xx => 44x}/cpm.c | 0
arch/powerpc/platforms/{4xx => 44x}/gpio.
Replace 4xx usage with 44x, and replace 4xx_SOC with 44x.
Signed-off-by: Michael Ellerman
---
arch/powerpc/Kconfig | 5 +
arch/powerpc/include/asm/cacheflush.h | 2 +-
arch/powerpc/include/asm/ppc_asm.h | 2 +-
arch/powerpc/kernel/entry_32.S | 6 +++---
arch/po
Now that 40x is gone, replace CONFIG_BOOKE_OR_40x by CONFIG_BOOKE.
Signed-off-by: Michael Ellerman
---
arch/powerpc/include/asm/hw_irq.h | 8
arch/powerpc/include/asm/irq.h | 2 +-
arch/powerpc/include/asm/kup.h | 2 +-
arch/powerpc/include/asm/processor.h | 2 +-
Remove 40x from Kconfig, making the code unreachable.
Signed-off-by: Michael Ellerman
---
arch/powerpc/Kconfig | 12 ++--
arch/powerpc/Kconfig.debug | 13 -
arch/powerpc/Makefile | 5 -
arch/powerpc/configs/40x.config
From: Christophe Leroy
Remove 40x platforms from the boot directory.
Signed-off-by: Christophe Leroy
Signed-off-by: Michael Ellerman
---
arch/powerpc/boot/4xx.c | 266 --
arch/powerpc/boot/4xx.h | 4 -
arch/powerpc/boot/Makefile | 11 -
arch
From: Christophe Leroy
40x platforms have been orphaned for many years.
Remove them.
Signed-off-by: Christophe Leroy
Signed-off-by: Michael Ellerman
---
MAINTAINERS | 1 -
arch/powerpc/configs/40x/acadia_defconfig | 61
arch/powerpc/configs
The 40x platforms & CPUs are old and have been unmaintained for years, and as
far as we can tell have no users.
Note 44x and 476 are not affected.
Christophe first proposed removing 40x in 2020:
https://lore.kernel.org/linuxppc-dev/40899eb1b8f10da3706acd06c3d46d2418c8886e.1585635837.git.christ
Add support to capture and parse raw instruction in objdump.
Currently, the perf tool infrastructure uses "--no-show-raw-insn" option
with "objdump" while disassemble. Example from powerpc with this option
for an instruction address is:
Snippet from:
objdump --start-address= --stop-address= -d
In case of register defined variable (found using
find_data_type_global_reg), if the type of variable happens to be base
type (example, long unsigned int), perf report captures it as:
12.85% long unsigned int long unsigned int +0 (no field)
The above data type is actually referring to sampl
There are cases where define a global register variable and associate it
with a specified register. Example, in powerpc, two registers are
defined to represent variable:
1. r13: represents local_paca
register struct paca_struct *local_paca asm("r13");
2. r1: represents stack_pointer
register void
Update instruction tracking with add instruction. Apart from "mr"
instruction, the register state is carried on by other insns, ie,
"add, addi, addis". Since these are not memory instructions and doesn't
fall in the range of (32 to 63), add these as part of nmemonic table.
For now, add* instruction
Add instruction tracking function "update_insn_state_powerpc" for
powerpc. Example sequence in powerpc:
ld r10,264(r3)
mr r31,r3
<
ld r9,312(r31)
Consider ithe sample is pointing to: "ld r9,312(r31)".
Here the memory reference is hit at "312(r31)" where 312 is the offset
and r31 is
Use the raw instruction code and macros to identify memory instructions,
extract register fields and also offset. The implementation addresses
the D-form, X-form, DS-form instructions. Two main functions are added.
New parse function "load_store__parse" as instruction ops parser for
memory instruct
Add "update_insn_state" callback to "struct arch" to handle instruction
tracking. Currently updating instruction state is handled by static
function "update_insn_state_x86" which is defined in "annotate-data.c".
Make this as a callback for specific arch and move to archs specific
file "arch/x86/ann
Fix a comment in function which explains how multi_regs field gets set
for an instruction. In the example, "mov %rsi, 8(%rbx,%rcx,4)", the
comment mistakenly referred to "dst_multi_regs = 0". Correct it to use
"src_multi_regs = 0"
Signed-off-by: Athira Rajeev
---
tools/perf/util/annotate.c | 2
Data type profiling uses instruction tracking by checking each
instruction and updating the register type state in some data
structures. This is useful to find the data type in cases when the
register state gets transferred from one reg to another. Example, in
x86, "mov" instruction and in powerpc,
The patchset from Namhyung added support for data type profiling
in perf tool. This enabled support to associate PMU samples to data
types they refer using DWARF debug information. With the upstream
perf, currently it possible to run perf report or perf annotate to
view the data type information on
In commit 0518dbe97fe6 ("selftests/mm: fix cross compilation with LLVM")
the logic to detect the machine architecture in the Makefile was
changed to use ARCH, and only fallback to uname -m if ARCH is unset.
However the tests of ARCH were not updated to account for the fact that
ARCH is "powerpc" fo
On 06/05/2024 10.01, Andrew Jones wrote:
On Mon, May 06, 2024 at 09:25:37AM GMT, Thomas Huth wrote:
On 04/05/2024 14.28, Nicholas Piggin wrote:
There are times we would like to test a function that is known to fail
in some conditions due to a bug in implementation (QEMU, KVM, or even
hardware).
On 06. 05. 24 10:49, Shengjiu Wang wrote:
Even now I still think V4L2 is the best option, but it looks like there
are a lot of rejects. If develop a new ALSA-mem2mem, it is also
a duplication of code (bigger duplication that just add audio support
in V4L2 I think).
Maybe not. Could you try to
Joey Gouly writes:
> The new config option specifies how many bits are in each PKEY.
>
> Signed-off-by: Joey Gouly
> Cc: Michael Ellerman
> Cc: Nicholas Piggin
> Cc: Christophe Leroy
> Cc: "Aneesh Kumar K.V"
> Cc: "Naveen N. Rao"
> Cc: linuxppc-dev@lists.ozlabs.org
> ---
> arch/powerpc/Kcon
On Fri, May 3, 2024 at 4:42 PM Mauro Carvalho Chehab wrote:
>
> Em Fri, 3 May 2024 10:47:19 +0900
> Mark Brown escreveu:
>
> > On Thu, May 02, 2024 at 10:26:43AM +0100, Mauro Carvalho Chehab wrote:
> > > Mauro Carvalho Chehab escreveu:
> >
> > > > There are still time control associated with it,
On Sat, May 04, 2024 at 10:28:07PM GMT, Nicholas Piggin wrote:
> This adds a few minor fixes.
>
> Signed-off-by: Nicholas Piggin
> ---
> docs/unittests.txt | 12 +++-
> 1 file changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/docs/unittests.txt b/docs/unittests.txt
> index 3192a
On Mon, May 06, 2024 at 09:25:37AM GMT, Thomas Huth wrote:
> On 04/05/2024 14.28, Nicholas Piggin wrote:
> > There are times we would like to test a function that is known to fail
> > in some conditions due to a bug in implementation (QEMU, KVM, or even
> > hardware). It would be nice to count thes
On 04/05/2024 14.28, Nicholas Piggin wrote:
Mark the failing h_cede_tm and spapr_vpa tests as kfail.
Signed-off-by: Nicholas Piggin
---
powerpc/spapr_vpa.c | 3 ++-
powerpc/tm.c| 3 ++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/powerpc/spapr_vpa.c b/powerpc/spap
On 04/05/2024 14.28, Nicholas Piggin wrote:
There are times we would like to test a function that is known to fail
in some conditions due to a bug in implementation (QEMU, KVM, or even
hardware). It would be nice to count these as known failures and not
report a summary failure.
xfail is not the
On 04/05/2024 14.28, Nicholas Piggin wrote:
This adds a few minor fixes.
Signed-off-by: Nicholas Piggin
---
docs/unittests.txt | 12 +++-
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/docs/unittests.txt b/docs/unittests.txt
index 3192a60ec..7cf2c55ad 100644
--- a/docs
54 matches
Mail list logo
