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PCI: hv: Introduce hv_msi_entry

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Add a new structure (hv_msi_entry), which is also defined in the TLFS,
to describe the msi entry for HVCALL_RETARGET_INTERRUPT. The structure
is needed because its layout may be different from architecture to
architecture.

Also add a new generic interface hv_set_msi_entry_from_desc() to allow
different archs to set the msi entry from msi_desc.

No functional change, only preparation for the future support of virtual
PCI on non-x86 architectures.

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 11:39:53 +08:00
committed by Lorenzo Pieralisi
parent 61bfd920ab
commit 1cf106d932
3 changed files with 18 additions and 4 deletions
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11
arch/x86/include/asm/hyperv-tlfs.h
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@@ -913,11 +913,18 @@ 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;
u32 address;
u32 data;
union hv_msi_entry msi_entry;
} __packed;
/*