linux-kernel - [PATCH v2 1/2] Drivers: hv: Export some symbols for mshv

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Message-Id: <20250512140432.2387503-2-namjain@linux.microsoft.com>
Date: Mon, 12 May 2025 19:34:31 +0530
From: Naman Jain <namjain@...ux.microsoft.com>
To: "K . Y . Srinivasan" <kys@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Wei Liu <wei.liu@...nel.org>,
	Dexuan Cui <decui@...rosoft.com>
Cc: Roman Kisel <romank@...ux.microsoft.com>,
	Anirudh Rayabharam <anrayabh@...ux.microsoft.com>,
	Saurabh Sengar <ssengar@...ux.microsoft.com>,
	Stanislav Kinsburskii <skinsburskii@...ux.microsoft.com>,
	Naman Jain <namjain@...ux.microsoft.com>,
	Nuno Das Neves <nunodasneves@...ux.microsoft.com>,
	ALOK TIWARI <alok.a.tiwari@...cle.com>,
	linux-kernel@...r.kernel.org,
	linux-hyperv@...r.kernel.org
Subject: [PATCH v2 1/2] Drivers: hv: Export some symbols for mshv_vtl

MSHV_VTL driver is going to be introduced, which is supposed to
provide interface for Virtual Machine Monitors (VMMs) to control
Virtual Trust Level (VTL). Export the symbols needed
to make it work (vmbus_isr, hv_context and hv_post_message).

Co-developed-by: Roman Kisel <romank@...ux.microsoft.com>
Signed-off-by: Roman Kisel <romank@...ux.microsoft.com>
Co-developed-by: Saurabh Sengar <ssengar@...ux.microsoft.com>
Signed-off-by: Saurabh Sengar <ssengar@...ux.microsoft.com>
Reviewed-by: Roman Kisel <romank@...ux.microsoft.com>
Signed-off-by: Naman Jain <namjain@...ux.microsoft.com>
---
 drivers/hv/hv.c           | 2 ++
 drivers/hv/hyperv_vmbus.h | 1 +
 drivers/hv/vmbus_drv.c    | 3 ++-
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 308c8f279df8..11e8096fe840 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -25,6 +25,7 @@
 
 /* The one and only */
 struct hv_context hv_context;
+EXPORT_SYMBOL_GPL(hv_context);
 
 /*
  * hv_init - Main initialization routine.
@@ -93,6 +94,7 @@ int hv_post_message(union hv_connection_id connection_id,
 
 	return hv_result(status);
 }
+EXPORT_SYMBOL_GPL(hv_post_message);
 
 int hv_synic_alloc(void)
 {
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index 0b450e53161e..b61f01fc1960 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -32,6 +32,7 @@
  */
 #define HV_UTIL_NEGO_TIMEOUT 55
 
+void vmbus_isr(void);
 
 /* Definitions for the monitored notification facility */
 union hv_monitor_trigger_group {
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 792bb614149d..55caac24d102 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1283,7 +1283,7 @@ static void vmbus_chan_sched(struct hv_per_cpu_context *hv_cpu)
 	}
 }
 
-static void vmbus_isr(void)
+void vmbus_isr(void)
 {
 	struct hv_per_cpu_context *hv_cpu
 		= this_cpu_ptr(hv_context.cpu_context);
@@ -1306,6 +1306,7 @@ static void vmbus_isr(void)
 
 	add_interrupt_randomness(vmbus_interrupt);
 }
+EXPORT_SYMBOL_GPL(vmbus_isr);
 
 static irqreturn_t vmbus_percpu_isr(int irq, void *dev_id)
 {
-- 
2.34.1