Srikar Dronamraju writes:
> If there are shared processor LPARs, underlying Hypervisor can have more
> virtual cores to handle than actual physical cores.
>
> Starting with Power 9, a big core (aka SMT8 core) has 2 nearly
> independent thread groups. On a shared processors LPARs, it helps to
>
* Aneesh Kumar K.V [2023-11-15 11:24:59]:
> Srikar Dronamraju writes:
>
> > PowerVM systems configured in shared processors mode have some unique
> > challenges. Some device-tree properties will be missing on a shared
> > processor. Hence some sched domains may not make sense for shared
Srikar Dronamraju writes:
> PowerVM systems configured in shared processors mode have some unique
> challenges. Some device-tree properties will be missing on a shared
> processor. Hence some sched domains may not make sense for shared processor
> systems.
>
> Most shared processor systems are
* Aneesh Kumar K.V [2023-11-15 10:57:08]:
> Srikar Dronamraju writes:
>
> > If there are shared processor LPARs, underlying Hypervisor can have more
> > virtual cores to handle than actual physical cores.
> >
> > Starting with Power 9, a big core (aka SMT8 core) has 2 nearly
> > independent
Srikar Dronamraju writes:
> If there are shared processor LPARs, underlying Hypervisor can have more
> virtual cores to handle than actual physical cores.
>
> Starting with Power 9, a big core (aka SMT8 core) has 2 nearly
> independent thread groups. On a shared processors LPARs, it helps to
>
Sourabh Jain writes:
> diff --git a/arch/powerpc/include/asm/fadump-internal.h
> b/arch/powerpc/include/asm/fadump-internal.h
> index 27f9e11eda28..7be3d8894520 100644
> --- a/arch/powerpc/include/asm/fadump-internal.h
> +++ b/arch/powerpc/include/asm/fadump-internal.h
> @@ -42,7 +42,25
On Fri Oct 13, 2023 at 11:12 PM AEST, Christophe Leroy wrote:
>
>
> Le 07/06/2023 à 02:56, Nicholas Piggin a écrit :
> > Fix an upstream powerpc bug that was discovered with a WARN_ON added in
> > "lazy tlb: consolidate lazy tlb mm switching":
> >
> > Switching mm and tinkering with
(Sorry I didn't see that Michael already made the same comment,
ignore my previous.)
On Wed Nov 15, 2023 at 7:32 AM AEST, Timothy Pearson wrote:
>
>
> - Original Message -
> > From: "Michael Ellerman"
> > To: "Timothy Pearson" , "linuxppc-dev"
> >
> > Cc: "Jens Axboe"
> > Sent:
On 11/14/23 at 08:03am, Joe Perches wrote:
> On Tue, 2023-11-14 at 23:32 +0800, Baoquan He wrote:
> > When specifying 'kexec -c -d', kexec_load interface will print loading
> > information, e.g the regions where kernel/initrd/purgatory/cmdline
> > are put, the memmap passed to 2nd kernel taken as
On 11/14/23 at 03:17pm, Andrew Morton wrote:
> On Tue, 14 Nov 2023 17:16:57 +0800 Baoquan He wrote:
>
> > This function, being a variant of walk_system_ram_res() introduced in
> > commit 8c86e70acead ("resource: provide new functions to walk through
> > resources"), walks through a list of all
On Tue, 14 Nov 2023 17:16:57 +0800 Baoquan He wrote:
> This function, being a variant of walk_system_ram_res() introduced in
> commit 8c86e70acead ("resource: provide new functions to walk through
> resources"), walks through a list of all the resources of System RAM
> in reversed order, i.e.,
- Original Message -
> From: "Michael Ellerman"
> To: "Timothy Pearson" , "linuxppc-dev"
>
> Cc: "Jens Axboe"
> Sent: Tuesday, November 14, 2023 6:14:37 AM
> Subject: Re: [PATCH] powerpc: Fix data corruption on IPI
> Hi Timothy,
>
> Thanks for debugging this, but I'm unclear why
From: Nathan Lynch
rtas_service_present() has no more users.
rtas_function_implemented() is now the appropriate API for determining
whether a given RTAS function is available to call.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/rtas.h | 1 -
arch/powerpc/kernel/rtas.c | 5
From: Nathan Lynch
This header occasionally gains new function declarations without the
leading extern in accordance with current style rules. Leaving the
legacy externs in place is making the header more difficult to read
over time because of the inconsistency. Remove them, fixing up
checkpatch
From: Nathan Lynch
This is a pseries-specific function declaration that doesn't belong in
rtas.h. Move it to the pseries platform code and adjust
pseries/suspend.c accordingly.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/rtas.h | 1 -
* Make minor coding style adjustments for readability.
* Remove rtas_service_present() and an old call_rtas() declaration.
* Move a pseries-specific function prototype to pseries code.
---
Changes in v2:
- Address various checkpatch issues missed in v1.
- Drop kernel-doc fixes already applied.
-
From: Nathan Lynch
The call_rtas() function has never been a part of arch/powerpc, and
its implementation was removed from arch/ppc by commit 0a26b1364f14
("ppc: Remove CHRP, POWER3 and POWER4 support from arch/ppc").
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/rtas.h | 2 --
1
From: Nathan Lynch
Use scripts/cleanfile to remove instances of trailing space in the
core RTAS code and header.
Signed-off-by: Nathan Lynch
---
arch/powerpc/include/asm/rtas.h | 6 +++---
arch/powerpc/kernel/rtas.c | 18 +-
2 files changed, 12 insertions(+), 12
: Log more error conditions in add path
arch/powerpc/platforms/pseries/hotplug-memory.c | 17 +++--
1 file changed, 11 insertions(+), 6 deletions(-)
---
base-commit: 707df298cbde200b939c70be2577b20775fe3345
change-id: 20231114-pseries-memhp-fixes-185988dde2a0
Best regards,
--
Nathan
From: Nathan Lynch
When an add operation for multiple LMBs fails, there is currently
little indication from the kernel of what went wrong. Be a little more
verbose about error conditions in the add paths.
Signed-off-by: Nathan Lynch
---
arch/powerpc/platforms/pseries/hotplug-memory.c | 7
From: Nathan Lynch
dlpar_memory_remove_by_index() may access beyond the bounds of the
drmem lmb array when the LMB lookup fails to match an entry with the
given DRC index. When the search fails, the cursor is left pointing to
_info->lmbs[drmem_info->n_lmbs], which is one element past the
last
From: Nathan Lynch
Callers of dlpar_add_lmb() are responsible for first acquiring the DRC
and releasing it if dlpar_add_lmb() fails.
However, dlpar_add_lmb() performs a dlpar_release_drc() in one error
branch. There is no corresponding dlpar_acquire_drc() in the
function, nor is there any
On Tue, 2023-11-14 at 23:32 +0800, Baoquan He wrote:
> When specifying 'kexec -c -d', kexec_load interface will print loading
> information, e.g the regions where kernel/initrd/purgatory/cmdline
> are put, the memmap passed to 2nd kernel taken as system RAM ranges,
> and printing all contents of
* Aneesh Kumar K V [2023-11-14 15:45:35]:
> On 11/14/23 3:16 PM, Srikar Dronamraju wrote:
> > * Aneesh Kumar K.V [2023-11-14 12:42:19]:
> >
> >> No functional change in this patch. A helper is added to find if
> >> vcpu is dispatched by hypervisor. Use that instead of opencoding.
> >> Also
Replace pr_debug() with the newly added kexec_dprintk() in kexec_file
loading related codes.
Signed-off-by: Baoquan He
---
arch/parisc/kernel/kexec_file.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/parisc/kernel/kexec_file.c b/arch/parisc/kernel/kexec_file.c
Replace pr_debug() with the newly added kexec_dprintk() in kexec_file
loading related codes.
And also remove the kimage->segment[] printing because the generic code
has done the printing.
Signed-off-by: Baoquan He
---
arch/arm64/kernel/kexec_image.c| 2 +-
Replace pr_debug() with the newly added kexec_dprintk() in kexec_file
loading related codes.
Signed-off-by: Baoquan He
---
arch/powerpc/kexec/elf_64.c | 8
arch/powerpc/kexec/file_load_64.c | 14 +++---
2 files changed, 11 insertions(+), 11 deletions(-)
diff --git
Replace pr_debug() with the newly added kexec_dprintk() in kexec_file
loading related codes.
And also print out e820 memmap passed to 2nd kernel just as kexec_load
interface has been doing.
Signed-off-by: Baoquan He
---
arch/x86/kernel/crash.c | 2 +-
Replace pr_debug() with the newly added kexec_dprintk() in kexec_file
loading related codes.
And also remove kexec_image_info() because the content has been printed
out in generic code.
Signed-off-by: Baoquan He
---
arch/riscv/kernel/elf_kexec.c | 9 +
When specifying 'kexec -c -d', kexec_load interface will print loading
information, e.g the regions where kernel/initrd/purgatory/cmdline
are put, the memmap passed to 2nd kernel taken as system RAM ranges,
and printing all contents of struct kexec_segment, etc. These are
very helpful for
Currently, specifying '-d' will print a lot of debugging information
about kexec/kdump loading with kexec_load interface.
However, kexec_file_load prints nothing even though '-d' is specified.
It's very inconvenient to debug or analyze the kexec/kdump loading when
something wrong happened with
Replace pr_debug() with the newly added kexec_dprintk() in kexec_file
loading related codes.
And also print out type/start/head of kimage and flags to help debug.
Signed-off-by: Baoquan He
---
kernel/crash_core.c| 3 ++-
kernel/kexec_file.c| 7 ++-
On 13/11/2023 02:45, Li zeming wrote:
The link pointer does not need to cast the type.
Signed-off-by: Li zeming
---
Acked-by: Frederic Barrat
Fred
drivers/misc/ocxl/link.c | 14 +++---
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git
On 13/11/2023 02:22, Li zeming wrote:
The irq pointer does not need to cast the type.
Signed-off-by: Li zeming
---
Acked-by: Frederic Barrat
Fred
drivers/misc/ocxl/afu_irq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/ocxl/afu_irq.c
On 13/11/2023 02:15, Li zeming wrote:
The ctx pointer does not need to cast the type.
Signed-off-by: Li zeming
---
Indeed, it's useless.
Acked-by: Frederic Barrat
drivers/misc/ocxl/context.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git
Hi Timothy,
Thanks for debugging this, but I'm unclear why this is helping because
we should already have a full barrier (hwsync) on both the sending and
receiving side.
More below.
Timothy Pearson writes:
> From 0b2678b7cdada1a3d9aec8626f31a988d81373fa Mon Sep 17 00:00:00 2001
> From: Timothy
On 13 November 2023 at 01:48 pm, Geert Uytterhoeven wrote:
Thanks for your report!
I can confirm there is no graphics output with m68k/virt, and
bisected this to my own commit 6ae2ff23aa43a0c4 ("drm/client: Convert
drm_client_buffer_addfb() to drm_mode_addfb2()"), ouch...
It turns out the old
On 11/14/23 3:16 PM, Srikar Dronamraju wrote:
> * Aneesh Kumar K.V [2023-11-14 12:42:19]:
>
>> No functional change in this patch. A helper is added to find if
>> vcpu is dispatched by hypervisor. Use that instead of opencoding.
>> Also clarify some of the comments.
>>
>> Signed-off-by: Aneesh
* Aneesh Kumar K.V [2023-11-14 12:42:19]:
> No functional change in this patch. A helper is added to find if
> vcpu is dispatched by hypervisor. Use that instead of opencoding.
> Also clarify some of the comments.
>
> Signed-off-by: Aneesh Kumar K.V
> ---
> arch/powerpc/include/asm/paravirt.h
On 11/14/23 2:53 PM, Shrikanth Hegde wrote:
>
>
> On 11/14/23 12:42 PM, Aneesh Kumar K.V wrote:
>> No functional change in this patch. A helper is added to find if
>> vcpu is dispatched by hypervisor. Use that instead of opencoding.
>> Also clarify some of the comments.
>>
>> Signed-off-by:
On 11/14/23 12:42 PM, Aneesh Kumar K.V wrote:
> No functional change in this patch. A helper is added to find if
> vcpu is dispatched by hypervisor. Use that instead of opencoding.
> Also clarify some of the comments.
>
> Signed-off-by: Aneesh Kumar K.V
> ---
>
Kexec_load interface has been doing top down searching and loading
kernel/initrd/purgtory etc to prepare for kexec reboot. In that way,
the benefits are that it avoids to consume and fragment limited low
memory which satisfy DMA buffer allocation and big chunk of continuous
memory during system
This function, being a variant of walk_system_ram_res() introduced in
commit 8c86e70acead ("resource: provide new functions to walk through
resources"), walks through a list of all the resources of System RAM
in reversed order, i.e., from higher to lower.
It will be used in kexec_file code to
Justification:
==
Kexec_load interface has been doing top down searching and loading
kernel/initrd/purgtory etc to prepare for kexec reboot. In that way,
the benefits are that it avoids to consume and fragment limited low
memory which satisfy DMA buffer allocation and big chunk of
This patch modifies the ARCH_HIBERNATION_POSSIBLE option to ensure that it
correctly depends on these PowerPC configurations being enabled. As a result,
it prevents the HOTPLUG_CPU from being selected when the required dependencies
are not satisfied.
This change aligns the dependency tree with
>From 0b2678b7cdada1a3d9aec8626f31a988d81373fa Mon Sep 17 00:00:00 2001
From: Timothy Pearson
Date: Mon, 13 Nov 2023 22:42:58 -0600
Subject: [PATCH] powerpc: Fix data corruption on IPI
On multithreaded SMP workloads such as those using io_uring, it is possible for
multiple threads to hold an
- Original Message -
> From: "Salvatore Bonaccorso"
> To: "Timothy Pearson"
> Cc: "Linuxppc-dev"
> , "Jens
> Axboe"
> , "regressions" , "Michael
> Ellerman" , "npiggin"
> , "christophe leroy"
> Sent: Tuesday, November 14, 2023 1:59:14 AM
> Subject: Re: [PATCH] powerpc: Fix data
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