linux-kernel - [PATCH 2/2] pci: hyperv: Move retarget related struct definitions into tlfs

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Message-Id: <20200121015713.69691-2-boqun.feng@gmail.com>
Date:   Tue, 21 Jan 2020 09:57:13 +0800
From:   Boqun Feng <boqun.feng@...il.com>
To:     linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Michael Kelley <mikelley@...rosoft.com>,
        Boqun Feng <boqun.feng@...il.com>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Sasha Levin <sashal@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <andrew.murray@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-pci@...r.kernel.org (open list:PCI NATIVE HOST BRIDGE AND
        ENDPOINT DRIVERS)
Subject: [PATCH 2/2] pci: hyperv: Move retarget related struct definitions into tlfs

For future support of virtual PCI on non-x86 architecture.

Signed-off-by: Boqun Feng (Microsoft) <boqun.feng@...il.com>
---
 arch/x86/include/asm/hyperv-tlfs.h  | 38 +++++++++++++++++++++++++++++
 arch/x86/include/asm/mshyperv.h     |  8 ++++++
 drivers/pci/controller/pci-hyperv.c | 38 +++--------------------------
 3 files changed, 50 insertions(+), 34 deletions(-)

diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index b9ebc20b2385..debe017ae748 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -912,4 +912,42 @@ struct hv_tlb_flush_ex {
 struct hv_partition_assist_pg {
 	u32 tlb_lock_count;
 };
+
+union hv_msi_entry {
+	u64 as_uint64;
+	struct {
+		u32 address;
+		u32 data;
+	} __packed;
+};
+
+struct hv_interrupt_entry {
+	u32 source;			/* 1 for MSI(-X) */
+	u32 reserved1;
+	union hv_msi_entry msi_entry;
+} __packed;
+
+/*
+ * flags for hv_device_interrupt_target.flags
+ */
+#define HV_DEVICE_INTERRUPT_TARGET_MULTICAST		1
+#define HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET	2
+
+struct hv_device_interrupt_target {
+	u32 vector;
+	u32 flags;
+	union {
+		u64 vp_mask;
+		struct hv_vpset vp_set;
+	};
+} __packed;
+
+/* HvRetargetDeviceInterrupt hypercall */
+struct hv_retarget_device_interrupt {
+	u64 partition_id;
+	u64 device_id;
+	struct hv_interrupt_entry int_entry;
+	u64 reserved2;
+	struct hv_device_interrupt_target int_target;
+} __packed __aligned(8);
 #endif
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index 6b79515abb82..d13319d82f6b 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -240,6 +240,14 @@ bool hv_vcpu_is_preempted(int vcpu);
 static inline void hv_apic_init(void) {}
 #endif
 
+#if IS_ENABLED(CONFIG_PCI_HYPERV)
+#define hv_set_msi_address_from_desc(msi_entry, msi_desc)	\
+do {								\
+	(msi_entry)->address = (msi_desc)->msg.address_lo;	\
+} while (0)
+
+#endif /* CONFIG_PCI_HYPERV */
+
 #else /* CONFIG_HYPERV */
 static inline void hyperv_init(void) {}
 static inline void hyperv_setup_mmu_ops(void) {}
diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
index aacfcc90d929..2240f2b3643e 100644
--- a/drivers/pci/controller/pci-hyperv.c
+++ b/drivers/pci/controller/pci-hyperv.c
@@ -406,36 +406,6 @@ struct pci_eject_response {
 
 static int pci_ring_size = (4 * PAGE_SIZE);
 
-struct hv_interrupt_entry {
-	u32	source;			/* 1 for MSI(-X) */
-	u32	reserved1;
-	u32	address;
-	u32	data;
-};
-
-/*
- * flags for hv_device_interrupt_target.flags
- */
-#define HV_DEVICE_INTERRUPT_TARGET_MULTICAST		1
-#define HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET	2
-
-struct hv_device_interrupt_target {
-	u32	vector;
-	u32	flags;
-	union {
-		u64		 vp_mask;
-		struct hv_vpset vp_set;
-	};
-};
-
-struct retarget_msi_interrupt {
-	u64	partition_id;		/* use "self" */
-	u64	device_id;
-	struct hv_interrupt_entry int_entry;
-	u64	reserved2;
-	struct hv_device_interrupt_target int_target;
-} __packed __aligned(8);
-
 /*
  * Driver specific state.
  */
@@ -482,7 +452,7 @@ struct hv_pcibus_device {
 	struct workqueue_struct *wq;
 
 	/* hypercall arg, must not cross page boundary */
-	struct retarget_msi_interrupt retarget_msi_interrupt_params;
+	struct hv_retarget_device_interrupt retarget_msi_interrupt_params;
 
 	/*
 	 * Don't put anything here: retarget_msi_interrupt_params must be last
@@ -1178,7 +1148,7 @@ static void hv_irq_unmask(struct irq_data *data)
 {
 	struct msi_desc *msi_desc = irq_data_get_msi_desc(data);
 	struct irq_cfg *cfg = irqd_cfg(data);
-	struct retarget_msi_interrupt *params;
+	struct hv_retarget_device_interrupt *params;
 	struct hv_pcibus_device *hbus;
 	struct cpumask *dest;
 	cpumask_var_t tmp;
@@ -1200,8 +1170,8 @@ static void hv_irq_unmask(struct irq_data *data)
 	memset(params, 0, sizeof(*params));
 	params->partition_id = HV_PARTITION_ID_SELF;
 	params->int_entry.source = 1; /* MSI(-X) */
-	params->int_entry.address = msi_desc->msg.address_lo;
-	params->int_entry.data = msi_desc->msg.data;
+	hv_set_msi_address_from_desc(&params->int_entry.msi_entry, msi_desc);
+	params->int_entry.msi_entry.data = msi_desc->msg.data;
 	params->device_id = (hbus->hdev->dev_instance.b[5] << 24) |
 			   (hbus->hdev->dev_instance.b[4] << 16) |
 			   (hbus->hdev->dev_instance.b[7] << 8) |
-- 
2.24.1