linux-kernel - Re: [RFC PATCH v2 5/5] selftests/bpf: sample implementation of a bpf pvsched driver.

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Message-ID: <CAO7JXPh=g2psw_ziw2vAZH8e_Hd_bOtBTsKW1uaBANo7RoQSXQ@mail.gmail.com>
Date: Mon, 8 Apr 2024 10:01:34 -0400
From: Vineeth Remanan Pillai <vineeth@...byteword.org>
To: Ben Segall <bsegall@...gle.com>, Borislav Petkov <bp@...en8.de>, 
	Daniel Bristot de Oliveira <bristot@...hat.com>, Dave Hansen <dave.hansen@...ux.intel.com>, 
	Dietmar Eggemann <dietmar.eggemann@....com>, "H . Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>, 
	Juri Lelli <juri.lelli@...hat.com>, Mel Gorman <mgorman@...e.de>, 
	Paolo Bonzini <pbonzini@...hat.com>, Andy Lutomirski <luto@...nel.org>, 
	Peter Zijlstra <peterz@...radead.org>, Sean Christopherson <seanjc@...gle.com>, 
	Thomas Gleixner <tglx@...utronix.de>, Valentin Schneider <vschneid@...hat.com>, 
	Vincent Guittot <vincent.guittot@...aro.org>, Vitaly Kuznetsov <vkuznets@...hat.com>, 
	Wanpeng Li <wanpengli@...cent.com>
Cc: Steven Rostedt <rostedt@...dmis.org>, Joel Fernandes <joel@...lfernandes.org>, 
	Suleiman Souhlal <suleiman@...gle.com>, Masami Hiramatsu <mhiramat@...nel.org>, himadrics@...ia.fr, 
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org, x86@...nel.org, 
	Tejun Heo <tj@...nel.org>, Josh Don <joshdon@...gle.com>, Barret Rhoden <brho@...gle.com>, 
	David Vernet <dvernet@...a.com>
Subject: Re: [RFC PATCH v2 5/5] selftests/bpf: sample implementation of a bpf
 pvsched driver.

Adding sched_ext folks

On Wed, Apr 3, 2024 at 10:01 AM Vineeth Pillai (Google)
<vineeth@...byteword.org> wrote:
>
> A dummy skeleton of a bpf pvsched driver. This is just for demonstration
> purpose and would need more work to be included as a test for this
> feature.
>
> Not-Signed-off-by: Vineeth Pillai (Google) <vineeth@...byteword.org>
> ---
>  .../testing/selftests/bpf/progs/bpf_pvsched.c | 37 +++++++++++++++++++
>  1 file changed, 37 insertions(+)
>  create mode 100644 tools/testing/selftests/bpf/progs/bpf_pvsched.c
>
> diff --git a/tools/testing/selftests/bpf/progs/bpf_pvsched.c b/tools/testing/selftests/bpf/progs/bpf_pvsched.c
> new file mode 100644
> index 000000000000..a653baa3034b
> --- /dev/null
> +++ b/tools/testing/selftests/bpf/progs/bpf_pvsched.c
> @@ -0,0 +1,37 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Copyright (c) 2019 Facebook */
> +
> +#include "vmlinux.h"
> +#include "bpf_tracing_net.h"
> +#include <bpf/bpf_tracing.h>
> +#include <bpf/bpf_helpers.h>
> +
> +char _license[] SEC("license") = "GPL";
> +
> +SEC("struct_ops/pvsched_vcpu_reg")
> +int BPF_PROG(pvsched_vcpu_reg, struct pid *pid)
> +{
> +       bpf_printk("pvsched_vcpu_reg: pid: %p", pid);
> +       return 0;
> +}
> +
> +SEC("struct_ops/pvsched_vcpu_unreg")
> +void BPF_PROG(pvsched_vcpu_unreg, struct pid *pid)
> +{
> +       bpf_printk("pvsched_vcpu_unreg: pid: %p", pid);
> +}
> +
> +SEC("struct_ops/pvsched_vcpu_notify_event")
> +void BPF_PROG(pvsched_vcpu_notify_event, void *addr, struct pid *pid, __u32 event)
> +{
> +       bpf_printk("pvsched_vcpu_notify: pid: %p, event:%u", pid, event);
> +}
> +
> +SEC(".struct_ops")
> +struct pvsched_vcpu_ops pvsched_ops = {
> +       .pvsched_vcpu_register          = (void *)pvsched_vcpu_reg,
> +       .pvsched_vcpu_unregister        = (void *)pvsched_vcpu_unreg,
> +       .pvsched_vcpu_notify_event      = (void *)pvsched_vcpu_notify_event,
> +       .events                         = 0x6,
> +       .name                           = "bpf_pvsched_ops",
> +};
> --
> 2.40.1
>