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

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Date: Wed,  3 Apr 2024 10:01:16 -0400
From: "Vineeth Pillai (Google)" <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: "Vineeth Pillai (Google)" <vineeth@...byteword.org>,
	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
Subject: [RFC PATCH v2 5/5] selftests/bpf: sample implementation of a bpf pvsched driver.

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