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From:   Michael Kelley <mikelley@microsoft.com>
To:     Wei Liu <wei.liu@kernel.org>,
        Linux on Hyper-V List <linux-hyperv@vger.kernel.org>
CC:     "virtualization@lists.linux-foundation.org" 
        <virtualization@lists.linux-foundation.org>,
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        Haiyang Zhang <haiyangz@microsoft.com>,
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        Arnd Bergmann <arnd@arndb.de>,
        "open list:GENERIC INCLUDE/ASM HEADER FILES" 
        <linux-arch@vger.kernel.org>
Subject: RE: [PATCH v6 13/16] asm-generic/hyperv: introduce hv_device_id and
 auxiliary structures
Thread-Topic: [PATCH v6 13/16] asm-generic/hyperv: introduce hv_device_id and
 auxiliary structures
Thread-Index: AQHW+j3ufdlM/sDd1kSOsRZpmh1j2KpIPepw
Date:   Thu, 4 Feb 2021 17:15:19 +0000
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 <20210203150435.27941-14-wei.liu@kernel.org>
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From: Wei Liu <wei.liu@kernel.org> Sent: Wednesday, February 3, 2021 7:05 A=
M
>=20
> We will need to identify the device we want Microsoft Hypervisor to
> manipulate.  Introduce the data structures for that purpose.
>=20
> They will be used in a later patch.
>=20
> Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
> Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com>
> Signed-off-by: Wei Liu <wei.liu@kernel.org>
> ---
> v6:
> 1. Add reserved0 as field name.
> ---
>  include/asm-generic/hyperv-tlfs.h | 79 +++++++++++++++++++++++++++++++
>  1 file changed, 79 insertions(+)
>=20
> diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hype=
rv-tlfs.h
> index 94c7d77bbf68..ce53c0db28ae 100644
> --- a/include/asm-generic/hyperv-tlfs.h
> +++ b/include/asm-generic/hyperv-tlfs.h
> @@ -623,4 +623,83 @@ struct hv_set_vp_registers_input {
>  	} element[];
>  } __packed;
>=20
> +enum hv_device_type {
> +	HV_DEVICE_TYPE_LOGICAL =3D 0,
> +	HV_DEVICE_TYPE_PCI =3D 1,
> +	HV_DEVICE_TYPE_IOAPIC =3D 2,
> +	HV_DEVICE_TYPE_ACPI =3D 3,
> +};
> +
> +typedef u16 hv_pci_rid;
> +typedef u16 hv_pci_segment;
> +typedef u64 hv_logical_device_id;
> +union hv_pci_bdf {
> +	u16 as_uint16;
> +
> +	struct {
> +		u8 function:3;
> +		u8 device:5;
> +		u8 bus;
> +	};
> +} __packed;
> +
> +union hv_pci_bus_range {
> +	u16 as_uint16;
> +
> +	struct {
> +		u8 subordinate_bus;
> +		u8 secondary_bus;
> +	};
> +} __packed;
> +
> +union hv_device_id {
> +	u64 as_uint64;
> +
> +	struct {
> +		u64 reserved0:62;
> +		u64 device_type:2;
> +	};
> +
> +	/* HV_DEVICE_TYPE_LOGICAL */
> +	struct {
> +		u64 id:62;
> +		u64 device_type:2;
> +	} logical;
> +
> +	/* HV_DEVICE_TYPE_PCI */
> +	struct {
> +		union {
> +			hv_pci_rid rid;
> +			union hv_pci_bdf bdf;
> +		};
> +
> +		hv_pci_segment segment;
> +		union hv_pci_bus_range shadow_bus_range;
> +
> +		u16 phantom_function_bits:2;
> +		u16 source_shadow:1;
> +
> +		u16 rsvdz0:11;
> +		u16 device_type:2;
> +	} pci;
> +
> +	/* HV_DEVICE_TYPE_IOAPIC */
> +	struct {
> +		u8 ioapic_id;
> +		u8 rsvdz0;
> +		u16 rsvdz1;
> +		u16 rsvdz2;
> +
> +		u16 rsvdz3:14;
> +		u16 device_type:2;
> +	} ioapic;
> +
> +	/* HV_DEVICE_TYPE_ACPI */
> +	struct {
> +		u32 input_mapping_base;
> +		u32 input_mapping_count:30;
> +		u32 device_type:2;
> +	} acpi;
> +} __packed;
> +
>  #endif
> --
> 2.20.1

Reviewed-by: Michael Kelley <mikelley@microsoft.com>