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PCI: hv: Move retarget related structures into tlfs header

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Currently, retarget_msi_interrupt and other structures it relys on are
defined in pci-hyperv.c. However, those structures are actually defined
in Hypervisor Top-Level Functional Specification [1] and may be
different in sizes of fields or layout from architecture to
architecture. Let's move those definitions into x86's tlfs header file
to support virtual PCI on non-x86 architectures in the future. Note that
"__packed" attribute is added to these structures during the movement
for the same reason as we use the attribute for other TLFS structures in
the header file: make sure the structures meet the specification and
avoid anything unexpected from the compilers.

Additionally, rename struct retarget_msi_interrupt to
hv_retarget_msi_interrupt for the consistent naming convention, also
mirroring the name in TLFS.

[1]: https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs

Signed-off-by: Boqun Feng (Microsoft) <boqun.feng@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
This commit is contained in:
Boqun Feng
2020-02-10 11:39:52 +08:00
committed by Lorenzo Pieralisi
parent b00f80fcfa
commit 61bfd920ab
2 changed files with 33 additions and 32 deletions
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31
arch/x86/include/asm/hyperv-tlfs.h
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@@ -912,4 +912,35 @@ struct hv_tlb_flush_ex {
struct hv_partition_assist_pg {
u32 tlb_lock_count;
};
struct hv_interrupt_entry {
u32 source; /* 1 for MSI(-X) */
u32 reserved1;
u32 address;
u32 data;
} __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; /* use "self" */
u64 device_id;
struct hv_interrupt_entry int_entry;
u64 reserved2;
struct hv_device_interrupt_target int_target;
} __packed __aligned(8);
#endif