Hello,
kernel test robot noticed a 10.7% improvement of
stress-ng.netlink-task.ops_per_sec on:
commit: d93300891f810c9498d09a6ecea2403d7a3546f0 ("[PATCH next v2 2/5]
locking/osq_lock: Optimise the vcpu_is_preempted() check.")
url:
Physical cpuid is used to irq routing for irqchips such as ipi/msi/
extioi interrupt controller. And physical cpuid is stored at CSR
register LOONGARCH_CSR_CPUID, it can not be changed once vcpu is
created. Since different irqchips have different size definition
about physical cpuid, KVM uses the
On LoongArch system, ipi hw uses iocsr registers, there is one iocsr
register access on ipi sender and two iocsr access on ipi receiver
which is ipi interrupt handler. On VM mode all iocsr registers
accessing will trap into hypervisor. So with one ipi hw notification
there will be three times of
The patch add paravirt interface for guest kernel, function
pv_guest_init firstly checks whether system runs on VM mode. If kernel
runs on VM mode, it will call function kvm_para_available to detect
whether current VMM is KVM hypervisor. And the paravirt function can work
only if current VMM is
This patch refines ipi handling on LoongArch platform, there are
three changes with this patch.
1. Add generic get_percpu_irq api, replace some percpu irq function
such as get_ipi_irq/get_pmc_irq/get_timer_irq with get_percpu_irq.
2. Change parameter action definition with function
This patchset adds pv ipi support for VM. On physical machine, ipi HW
uses IOCSR registers, however there is trap into hypervisor when vcpu
accesses IOCSR registers if system is in VM mode. SWI is a interrupt
mechanism like SGI on ARM, software can send interrupt to CPU, only that
on LoongArch SWI
System will trap into hypervisor when executing cpucfg instruction.
And now hardware only uses the area 0 - 20 for actual usage, here
one specified area 0x1000 -- 0x10ff is used for KVM hypervisor,
and the area can be extended for other hypervisors in future.
Signed-off-by: Bibo Mao
---
On LoongArch system, hypercall instruction is supported when system
runs on VM mode. This patch adds dummy function with hypercall
instruction emulation, rather than inject EXCCODE_INE invalid
instruction exception.
Signed-off-by: Bibo Mao
---
arch/loongarch/include/asm/Kbuild | 1 -
On Fri, Jan 5, 2024 at 6:14 PM Maxime Coquelin
wrote:
>
>
>
> On 1/5/24 10:59, Eugenio Perez Martin wrote:
> > On Fri, Jan 5, 2024 at 9:12 AM Maxime Coquelin
> > wrote:
> >>
> >>
> >>
> >> On 1/5/24 03:45, Jason Wang wrote:
> >>> On Thu, Jan 4, 2024 at 11:38 PM Maxime Coquelin
> >>> wrote:
>
From: "Steven Rostedt (Google)"
The parse_actions() function uses 'len = str_has_prefix()' to test which
action is in the string being parsed. But then it goes and repeats the
logic for each different action. This logic can be simplified and
duplicate code can be removed as 'len' contains the
On Fri, 5 Jan 2024 17:09:10 +
Mark Rutland wrote:
> On Mon, Dec 18, 2023 at 10:13:46PM +0900, Masami Hiramatsu (Google) wrote:
> > From: Steven Rostedt (VMware)
> >
> > Allow for instances to have their own ftrace_ops part of the fgraph_ops
> > that makes the funtion_graph tracer filter on
On Fri, 5 Jan 2024 17:14:06 +
Mark Rutland wrote:
> On Mon, Dec 18, 2023 at 10:15:59PM +0900, Masami Hiramatsu (Google) wrote:
> > From: Masami Hiramatsu (Google)
> >
> > Rename ftrace_regs_return_value to ftrace_regs_get_return_value as same as
> > other ftrace_regs_get/set_* APIs.
> >
>
On Sun, 7 Jan 2024 13:29:12 -0500
Steven Rostedt wrote:
> >
> > IOW, the inode_permission() in lookup_one_len() that eventfs does is
> > redundant and just wrong.
>
> I don't think so.
Just to make it clear. eventfs has nothing to do with mkdir instance/foo.
It exists without that. Although
On 12.12.2023 10:32, Marco Elver wrote:
> On Tue, 12 Dec 2023 at 10:19, Paul Heidekrüger
> wrote:
> >
> > On 12.12.2023 00:37, Andrey Konovalov wrote:
> > > On Tue, Dec 12, 2023 at 12:35 AM Paul Heidekrüger
> > > wrote:
> > > >
> > > > Using CONFIG_FTRACE=y instead of CONFIG_TRACEPOINTS=y
On Sun, 7 Jan 2024 13:42:39 +0100
Christian Brauner wrote:
>
> So, I tried to do an exploratory patch even though I promised myself not
> to do it. But hey...
>
> Some notes:
>
> * Permission handling for idmapped mounts is done completely in the
> VFS. That's the case for all filesytems
On Sun, Jan 07, 2024 at 06:42:33PM +0100, Christian Brauner wrote:
> On Sun, Jan 07, 2024 at 01:42:39PM +0100, Christian Brauner wrote:
> > > > So tracefs supports remounting with different uid/gid mount options and
> > > > then actually wades through _all_ of the inodes and changes their
> > > >
On Sun, Jan 07, 2024 at 01:42:39PM +0100, Christian Brauner wrote:
> > > So tracefs supports remounting with different uid/gid mount options and
> > > then actually wades through _all_ of the inodes and changes their
> > > ownership internally? What's the use-case for this? Containers?
> >
> >
On Sun, Jan 07, 2024 at 10:49:20AM +0100, Karel Balej wrote:
> On Fri Jan 5, 2024 at 4:18 PM CET, Mark Brown wrote:
> > Why are we adding an of_compatible here? It's redundant, the MFD split
> > is a feature of Linux internals not of the hardware, and the existing
> > 88pm8xx MFD doesn't use
On Sun Jan 7, 2024 at 11:35 AM CET, Krzysztof Kozlowski wrote:
> On 28/12/2023 10:39, Karel Balej wrote:
> > diff --git a/drivers/mfd/88pm88x.c b/drivers/mfd/88pm88x.c
> > index 69a8e39d43b3..999d0539b720 100644
> > --- a/drivers/mfd/88pm88x.c
> > +++ b/drivers/mfd/88pm88x.c
> > @@ -68,6 +68,21 @@
Krzysztof,
On Sun Jan 7, 2024 at 11:34 AM CET, Krzysztof Kozlowski wrote:
> On 07/01/2024 10:49, Karel Balej wrote:
> > Mark,
> >
> > On Fri Jan 5, 2024 at 4:18 PM CET, Mark Brown wrote:
> >> On Thu, Dec 28, 2023 at 10:39:13AM +0100, Karel Balej wrote:
> >>
> >>> @@ -68,6 +68,21 @@ static struct
> > So tracefs supports remounting with different uid/gid mount options and
> > then actually wades through _all_ of the inodes and changes their
> > ownership internally? What's the use-case for this? Containers?
>
> No, in fact tracing doesn't work well with containers as tracing is global
> to
On 28/12/2023 10:39, Karel Balej wrote:
> diff --git a/drivers/mfd/88pm88x.c b/drivers/mfd/88pm88x.c
> index 69a8e39d43b3..999d0539b720 100644
> --- a/drivers/mfd/88pm88x.c
> +++ b/drivers/mfd/88pm88x.c
> @@ -68,6 +68,21 @@ static struct mfd_cell pm886_devs[] = {
> .num_resources =
On 07/01/2024 10:49, Karel Balej wrote:
> Mark,
>
> On Fri Jan 5, 2024 at 4:18 PM CET, Mark Brown wrote:
>> On Thu, Dec 28, 2023 at 10:39:13AM +0100, Karel Balej wrote:
>>
>>> @@ -68,6 +68,21 @@ static struct mfd_cell pm886_devs[] = {
>>> .num_resources =
Mark,
On Fri Jan 5, 2024 at 4:18 PM CET, Mark Brown wrote:
> On Thu, Dec 28, 2023 at 10:39:13AM +0100, Karel Balej wrote:
>
> > @@ -68,6 +68,21 @@ static struct mfd_cell pm886_devs[] = {
> > .num_resources = ARRAY_SIZE(pm88x_onkey_resources),
> > .resources =
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