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References: <20240403140116.3002809-1-vineeth@bitbyteword.org> <20240403140116.3002809-6-vineeth@bitbyteword.org>
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From: Vineeth Remanan Pillai <vineeth@bitbyteword.org>
Date: Mon, 8 Apr 2024 10:01:34 -0400
Message-ID: <CAO7JXPh=g2psw_ziw2vAZH8e_Hd_bOtBTsKW1uaBANo7RoQSXQ@mail.gmail.com>
Subject: Re: [RFC PATCH v2 5/5] selftests/bpf: sample implementation of a bpf
 pvsched driver.
To: Ben Segall <bsegall@google.com>, Borislav Petkov <bp@alien8.de>, 
	Daniel Bristot de Oliveira <bristot@redhat.com>, Dave Hansen <dave.hansen@linux.intel.com>, 
	Dietmar Eggemann <dietmar.eggemann@arm.com>, "H . Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>, 
	Juri Lelli <juri.lelli@redhat.com>, Mel Gorman <mgorman@suse.de>, 
	Paolo Bonzini <pbonzini@redhat.com>, Andy Lutomirski <luto@kernel.org>, 
	Peter Zijlstra <peterz@infradead.org>, Sean Christopherson <seanjc@google.com>, 
	Thomas Gleixner <tglx@linutronix.de>, Valentin Schneider <vschneid@redhat.com>, 
	Vincent Guittot <vincent.guittot@linaro.org>, Vitaly Kuznetsov <vkuznets@redhat.com>, 
	Wanpeng Li <wanpengli@tencent.com>
Cc: Steven Rostedt <rostedt@goodmis.org>, Joel Fernandes <joel@joelfernandes.org>, 
	Suleiman Souhlal <suleiman@google.com>, Masami Hiramatsu <mhiramat@kernel.org>, himadrics@inria.fr, 
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, 
	Tejun Heo <tj@kernel.org>, Josh Don <joshdon@google.com>, Barret Rhoden <brho@google.com>, 
	David Vernet <dvernet@meta.com>
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Adding sched_ext folks

On Wed, Apr 3, 2024 at 10:01=E2=80=AFAM Vineeth Pillai (Google)
<vineeth@bitbyteword.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@bitbyteword.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/test=
ing/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") =3D "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 =3D {
> +       .pvsched_vcpu_register          =3D (void *)pvsched_vcpu_reg,
> +       .pvsched_vcpu_unregister        =3D (void *)pvsched_vcpu_unreg,
> +       .pvsched_vcpu_notify_event      =3D (void *)pvsched_vcpu_notify_e=
vent,
> +       .events                         =3D 0x6,
> +       .name                           =3D "bpf_pvsched_ops",
> +};
> --
> 2.40.1
>