The user space polls on the wait_queue for the payload from the
specific source. The hypervisor interrupts the OS when the pipe
status for the specific source is changed such as payload is
available for the partition or pipe to the source is closed. The
OS retrieves the HVPIPE event message with ch
On 10/09/2025 17:37, David Hildenbrand wrote:
>>
>> Somewhat, but in the regular case where enter() is called followed by
>> leave() there is really no complexity for the caller, just an extra
>> local variable.
>>
>> There are complications where we want to exit lazy_mmu temporarily, as
>> in mm/k
On Wed, Sep 10, 2025 at 03:10:05PM +0200, Linus Walleij wrote:
> This is is done so that we can unmap *most* of the kernel
> memory but *keep* the VMALLOC area, so that e.g. exceptions
> can still execute and save to stack when they occur, and we can
> call into the kernel to execute said exception
From: Rohan McLure
On several powerpc platforms, a page table entry may not imply whether
the relevant mapping is for userspace or kernelspace. Instead, such
platforms infer this by the address which is being accessed.
Add an additional address argument to each of these routines in order to
prov
On Wed, Sep 10, 2025, at 16:04, Matthew Wilcox wrote:
> On Wed, Sep 10, 2025 at 03:10:05PM +0200, Linus Walleij wrote:
>>
>> This in practice means the area 0xf100-0x
>> which also includes the high exception vectors that must for
>> natural reasons also be kept in the mapping.
>> What
Copy all the functions from interrupt.h to arch specific entry-common.h file
as it will be a part of common now.
No functional change intended here.
Signed-off-by: Mukesh Kumar Chaurasiya
---
arch/powerpc/include/asm/entry-common.h | 420
1 file changed, 420 insertions(
All architectures supporting CONFIG_PARAVIRT share the same contents
of asm/paravirt_api_clock.h:
#include
So remove all incarnations of asm/paravirt_api_clock.h and remove the
only place where it is included, as there asm/paravirt.h is included
anyway.
Signed-off-by: Juergen Gross
---
arch
Can't we just use an "enum lazy_mmu_state" and call it a day?
I could envision something completely different for this type on s390,
e.g. a pointer to a per-cpu structure. So I would really ask to stick
with the current approach.
This is indeed the motivation - let every arch do whatever it se
On 28/08/2025 12:38, Trevor Woerner wrote:
> In commit b52173065e0a ("sched/debug: Remove CONFIG_SCHED_DEBUG") this
> Kconfig option was removed since CONFIG_SCHED_DEBUG was made unconditional
> by patches preceding it.
>
> Signed-off-by: Trevor Woerner
I doubt anyone will pick up such patch tou
Commit 13799748b957 ("powerpc/64: use interrupt restart table to speed
up return from interrupt") removed the inconditional clearing of
MSR[RI] when returning from interrupt into kernel. But powerpc/32
doesn't implement interrupt restart table hence still need MSR[RI]
to be cleared.
It could be ad
On 9/11/25 10:36 PM, K Prateek Nayak wrote:
Hello Shrikanth,
On 9/11/2025 10:22 PM, Shrikanth Hegde wrote:
+ if (is_cpu_paravirt(cpu))
+ push_current_from_paravirt_cpu(rq);
Does this mean paravirt CPU is capable of handling an interrupt but may
not be continuously available to ru
On Thu, 11 Sep 2025 23:43:22 +0200,
Thorsten Blum wrote:
>
> The size parameter of strscpy() is optional if the destination buffer
> has a fixed length and strscpy() can automatically determine its size
> using sizeof(). This makes many explicit size arguments redundant.
>
> Remove them to shorte
port_srp pseries_wdt
[ 163.372127] CPU: 22 UID: 0 PID: 130 Comm: kworker/22:0 Kdump: loaded
Not tainted 6.17.0-rc5-next-20250911 #1 VOLUNTARY
[ 163.372142] Hardware name: IBM,9080-HEX Power11 (architected)
0x820200 0xf07 of:IBM,FW1110.01 (NH1110_069) hv:phyp pSeries
[ 163.372155] Wo
On Mon, 18 Aug 2025 14:17:34 +0200, Christophe Leroy wrote:
> In order to drop legacy-of-mm-gpiochip dependency, first change the
> 44x GPIO driver to a proper platform driver.
>
>
Applied to powerpc/next.
[1/2] powerpc/44x: Change GPIO driver to a proper platform driver
https://git.kerne
On Tue, 19 Aug 2025 18:58:29 +0200, Thorsten Blum wrote:
> Remove hard-coded strings by using the str_write_read() helper function
> and silence the following Coccinelle/coccicheck warning reported by
> string_choices.cocci:
>
> opportunity for str_write_read(write)
>
>
> [...]
Applied to pow
From: Leon Romanovsky
Make sure that CPU is not synced and IOMMU is configured to take
MMIO path by providing newly introduced DMA_ATTR_MMIO attribute.
Reviewed-by: Keith Busch
Signed-off-by: Leon Romanovsky
---
block/blk-mq-dma.c | 13 +++--
include/linux/blk-mq-dma.h | 6 ++
On Mon, 18 Aug 2025 11:26:44 +0200, Christophe Leroy wrote:
> Include asm/syscalls.h to get the correct prototype for sys_ni_syscall()
>
>
Applied to powerpc/next.
[1/1] powerpc/vdso: Include asm/syscalls.h for sys_ni_syscall()
https://git.kernel.org/powerpc/c/58f5382a482ba7313085de57767b
On Thu, 04 Sep 2025 15:38:31 +0530, Saket Kumar Bhaskar wrote:
> This patch series introduces support for the PROBE_MEM32,
> bpf_addr_space_cast and PROBE_ATOMIC instructions in the powerpc BPF JIT,
> facilitating the implementation of BPF arena and arena atomics.
>
> All selftests related to bpf_
On Wed, 13 Aug 2025 17:53:18 +0530, Gautam Menghani wrote:
> Remove duplicate definition of ppc_msgsnd_sync() introduced in commit
> b87ac0218355 ('powerpc: Introduce msgsnd/doorbell barrier primitives').
>
> No functional change intended.
>
>
Applied to powerpc/next.
[1/1] powerpc: Remove dup
On Mon, 18 Aug 2025 11:24:22 +0200, Christophe Leroy wrote:
> SPRN_M_TWB contains the address of task PGD minus an offset which
> compensates the offset required when accessing the kernel PGDIR.
> However, since commit ac9f97ff8b32 ("powerpc/8xx: Inconditionally use
> task PGDIR in DTLB misses") an
On Mon, 11 Aug 2025 11:28:53 +0200, Nam Cao wrote:
> The initial implementation of PCI/MSI interrupt domains in the hierarchical
> interrupt domain model used a shortcut by providing a global PCI/MSI
> domain.
>
> This works because the PCI/MSI[X] hardware is standardized and uniform, but
> it vio
On Tue, 01 Jul 2025 12:50:07 +0200, Christophe Leroy wrote:
> Commit 118c40b7b503 ("kbuild: require gcc-8 and binutils-2.30") raised
> minimum GCC_VERSION and LD_VERSION.
>
> Simplify powerpc build accordingly.
>
>
Applied to powerpc/next.
[1/1] arch/powerpc: Remove support for older GCC and b
On Mon, 18 Aug 2025 14:14:36 +0200, Christophe Leroy wrote:
> Remove legacy-of-mm-gpiochip.h header file. The above mentioned
> file provides an OF API that's deprecated. There is no agnostic
> alternatives to it and we have to open code the logic which was
> hidden behind of_mm_gpiochip_add_data()
On Mon, 18 Aug 2025 14:42:24 +0200, Christophe Leroy wrote:
> Remove legacy-of-mm-gpiochip.h header file. The above mentioned
> file provides an OF API that's deprecated. There is no agnostic
> alternatives to it and we have to open code the logic which was
> hidden behind of_mm_gpiochip_add_data()
On Fri, Aug 29, 2025 at 09:25:00AM +0200, Lukas Wunner wrote:
> The documentation on PCIe Advanced Error Reporting hasn't kept up with
> code changes over the years. This series seeks to remedy as many issues
> as I could find.
>
> Previous commits touching the documentation either prefixed the s
[+cc Terry, Robert, CXL list, Smita, Dongdong]
On Fri, Sep 05, 2025 at 02:25:27AM +0800, Vernon Yang wrote:
> From: Vernon Yang
>
> The kzalloc(GFP_KERNEL) may return NULL, so all accesses to
> aer_info->xxx will result in kernel panic. Fix it.
>
> Signed-off-by: Vernon Yang
Applied to pci/ae
On 10.09.2025 07:26, Leon Romanovsky wrote:
> On Tue, Sep 09, 2025 at 10:37:48PM +0300, Leon Romanovsky wrote:
>> On Tue, Sep 09, 2025 at 04:27:31PM +0300, Leon Romanovsky wrote:
>>> From: Leon Romanovsky
>> <...>
>>
>>> include/linux/page-flags.h | 1 +
>> <...>
>>
>>> --- a/include/lin
On 09.09.2025 15:27, Leon Romanovsky wrote:
> From: Leon Romanovsky
>
> Changelog:
> v6:
> * Based on "dma-debug: don't enforce dma mapping check on noncoherent
> allocations" patch.
> * Removed some unused variables from kmsan conversion.
> * Fixed missed ! in dma check.
> v5: https://l
The size parameter of strscpy() is optional if the destination buffer
has a fixed length and strscpy() can automatically determine its size
using sizeof(). This makes many explicit size arguments redundant.
Remove them to shorten and simplify the code.
No functional changes intended.
Signed-off-
On the other hand, with a pagefault_disabled-like approach, there is no
way to instruct call {3} to fully exit lazy_mmu regardless of the
nesting level.
Sure there is, with a better API. See below. :)
I meant while keeping the existing shape of the API but yes fair enough!
Time to do it prop
Hello Shrikanth,
On 9/11/2025 10:22 PM, Shrikanth Hegde wrote:
>>> + if (is_cpu_paravirt(cpu))
>>> + push_current_from_paravirt_cpu(rq);
>>
>> Does this mean paravirt CPU is capable of handling an interrupt but may
>> not be continuously available to run a task?
>
> When i run hackbench
On 11/09/2025 14:06, Alexander Gordeev wrote:
> On Wed, Sep 10, 2025 at 06:11:54PM +0200, Kevin Brodsky wrote:
>
> Hi Kevin,
>
>> On 09/09/2025 16:38, Alexander Gordeev wrote:
>>> Would that integrate well with LAZY_MMU_DEFAULT etc?
>> Hmm... I though the idea is to use LAZY_MMU_* by archit
On 9/11/25 7:23 AM, Yury Norov wrote:
On Wed, Sep 10, 2025 at 11:12:03PM +0530, Shrikanth Hegde wrote:
CPUs are marked paravirt when there is contention for underlying
physical CPU.
The push mechanism and check for paravirt CPUs are in sched tick
and wakeup. It should be close to no-op when
On Wed, Sep 10, 2025 at 06:11:54PM +0200, Kevin Brodsky wrote:
Hi Kevin,
> On 09/09/2025 16:38, Alexander Gordeev wrote:
> > Would that integrate well with LAZY_MMU_DEFAULT etc?
> Hmm... I though the idea is to use LAZY_MMU_* by architectures that
> want to use it - at least that is
On Thu, Sep 11, 2025, at 07:38, Andreas Larsson wrote:
>
> We have a upcoming SoC with support for up to 16 GiB of DRAM. When that is
> used in LEON sparc32 configuration (using 36-bit physical addressing), a
> removed CONFIG_HIGHMEM would be a considerable limitation, even after an
> introduction
On Thu, Sep 11, 2025 at 08:34:19AM +0200, Juergen Gross wrote:
> Some cleanups and reorg of paravirt code and headers:
>
> - The first 2 patches should be not controversial at all, as they
> remove just some no longer needed #include and struct forward
> declarations.
>
> - The 3rd patch is r
Hello Shrikanth,
On 9/10/2025 11:12 PM, Shrikanth Hegde wrote:
> @@ -8563,7 +8563,7 @@ select_task_rq_fair(struct task_struct *p, int
> prev_cpu, int wake_flags)
> if (!is_rd_overutilized(this_rq()->rd)) {
> new_cpu = find_energy_efficient_cpu(p, prev_cpu);
>
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