PCI: hv: Replace hv_vp_set with hv_vpset

mainline inclusion
from mainline-5.0
commit 9bc1174280dd
category: bugfix
bugzilla: 12122
CVE: NA

-------------------------------------------------

Remove a duplicate definition of VP set (hv_vp_set) and use the common
definition (hv_vpset) that is used in other places.

Change the order of the members in struct hv_pcibus_device so that the
declaration of retarget_msi_interrupt_params is the last member. Struct
hv_vpset, which contains a flexible array, is nested two levels deep in
struct hv_pcibus_device via retarget_msi_interrupt_params.

Add a comment that retarget_msi_interrupt_params should be the last
member of struct hv_pcibus_device.
Signed-off-by: NMaya Nakamura <m.maya.nakamura@gmail.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: NMichael Kelley <mikelley@microsoft.com>
Reviewed-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: NXiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: NYao Hongbo <yaohongbo@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/pci/controller/pci-hyperv.c

@@ -393,12 +393,6 @@ struct hv_interrupt_entry {
 
 #define HV_VP_SET_BANK_COUNT_MAX	5 /* current implementation limit */
 
-struct hv_vp_set {
-	u64	format;			/* 0 (HvGenericSetSparse4k) */
-	u64	valid_banks;
-	u64	masks[HV_VP_SET_BANK_COUNT_MAX];
-};
-
 /*
  * flags for hv_device_interrupt_target.flags
  */
@@ -410,7 +404,7 @@ struct hv_device_interrupt_target {
 	u32	flags;
 	union {
 		u64		 vp_mask;
-		struct hv_vp_set vp_set;
+		struct hv_vpset vp_set;
 	};
 };
 
@@ -460,12 +454,16 @@ struct hv_pcibus_device {
 	struct msi_controller msi_chip;
 	struct irq_domain *irq_domain;
 
-	/* hypercall arg, must not cross page boundary */
-	struct retarget_msi_interrupt retarget_msi_interrupt_params;
-
 	spinlock_t retarget_msi_interrupt_lock;
 
 	struct workqueue_struct *wq;
+
+	/* hypercall arg, must not cross page boundary */
+	struct retarget_msi_interrupt retarget_msi_interrupt_params;
+
+	/*
+	 * Don't put anything here: retarget_msi_interrupt_params must be last
+	 */
 };
 
 /*
@@ -955,12 +953,13 @@ static void hv_irq_unmask(struct irq_data *data)
 		 */
 		params->int_target.flags |=
 			HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET;
-		params->int_target.vp_set.valid_banks =
+		params->int_target.vp_set.valid_bank_mask =
 			(1ull << HV_VP_SET_BANK_COUNT_MAX) - 1;
 
 		/*
 		 * var-sized hypercall, var-size starts after vp_mask (thus
-		 * vp_set.format does not count, but vp_set.valid_banks does).
+		 * vp_set.format does not count, but vp_set.valid_bank_mask
+		 * does).
 		 */
 		var_size = 1 + HV_VP_SET_BANK_COUNT_MAX;
 
@@ -974,7 +973,7 @@ static void hv_irq_unmask(struct irq_data *data)
 				goto exit_unlock;
 			}
 
-			params->int_target.vp_set.masks[cpu_vmbus / 64] |=
+			params->int_target.vp_set.bank_contents[cpu_vmbus / 64]	|=
 				(1ULL << (cpu_vmbus & 63));
 		}
 	} else {