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Date: Fri, 9 Jul 2021 11:43:33 +0000
From: Wei Liu <wei.liu@...nel.org>
To: Linux on Hyper-V List <linux-hyperv@...r.kernel.org>
Cc: virtualization@...ts.linux-foundation.org,
Linux Kernel List <linux-kernel@...r.kernel.org>,
Michael Kelley <mikelley@...rosoft.com>,
Vineeth Pillai <viremana@...ux.microsoft.com>,
Sunil Muthuswamy <sunilmut@...rosoft.com>,
Nuno Das Neves <nunodasneves@...ux.microsoft.com>,
kumarpraveen@...ux.microsoft.com, pasha.tatashin@...een.com,
Wei Liu <wei.liu@...nel.org>,
"K. Y. Srinivasan" <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
Stephen Hemminger <sthemmin@...rosoft.com>,
Dexuan Cui <decui@...rosoft.com>,
Arnd Bergmann <arnd@...db.de>,
linux-arch@...r.kernel.org (open list:GENERIC INCLUDE/ASM HEADER FILES)
Subject: [RFC v1 2/8] asm-generic/hyperv: add device domain definitions
These definitions are for the IOMMU device domain interfaces exposed by
Microsoft Hyperivsor. We will use them to implement DMA remapping.
Signed-off-by: Wei Liu <wei.liu@...nel.org>
---
include/asm-generic/hyperv-tlfs.h | 144 ++++++++++++++++++++++++++++++
1 file changed, 144 insertions(+)
diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index c1d3424f9e00..a39b0e6393f2 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -93,6 +93,13 @@
#define HV_ENABLE_EXTENDED_HYPERCALLS BIT(20)
#define HV_ISOLATION BIT(22)
+/*
+ * Group D features
+ */
+#define HV_DEVICE_DOMAIN_AVAILABLE BIT(24)
+#define HV_S1_DEVICE_DOMAIN_AVAILABLE BIT(25)
+
+
/*
* TSC page layout.
*/
@@ -179,6 +186,17 @@ struct ms_hyperv_tsc_page {
#define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af
#define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST 0x00b0
#define HVCALL_GET_GPA_PAGES_ACCESS_STATES 0x00c9
+#define HVCALL_CREATE_DEVICE_DOMAIN 0x00b1
+#define HVCALL_ATTACH_DEVICE_DOMAIN 0x00b2
+#define HVCALL_MAP_DEVICE_GPA_PAGES 0x00b3
+#define HVCALL_UNMAP_DEVICE_GPA_PAGES 0x00b4
+#define HVCALL_DETACH_DEVICE_DOMAIN 0x00c4
+#define HVCALL_DELETE_DEVICE_DOMAIN 0x00c5
+#define HVCALL_QUERY_DEVICE_DOMAIN 0x00c6
+#define HVCALL_MAP_SPARSE_DEVICE_GPA_PAGES 0x00c7
+#define HVCALL_UNMAP_SPARSE_DEVICE_GPA_PAGES 0x00c8
+#define HVCALL_CONFIGURE_DEVICE_DOMAIN 0x00ce
+#define HVCALL_FLUSH_DEVICE_DOMAIN 0x00d0
#define HVCALL_MAP_VP_STATE_PAGE 0x00e1
#define HVCALL_GET_VP_STATE 0x00e3
#define HVCALL_SET_VP_STATE 0x00e4
@@ -1069,4 +1087,130 @@ union hv_disconnect_port {
u32 reserved: 31;
};
} __packed;
+
+/* Device domain types */
+#define HV_DEVICE_DOMAIN_TYPE_S2 0 /* Stage 2 domain */
+#define HV_DEVICE_DOMAIN_TYPE_S1 1 /* Stage 1 domain */
+#define HV_DEVICE_DOMAIN_TYPE_SOC 2 /* SOC domain */
+
+/* ID for stage 2 default domain and NULL domain */
+#define HV_DEVICE_DOMAIN_ID_S2_DEFAULT 0
+#define HV_DEVICE_DOMAIN_ID_S2_NULL 0xFFFFFFFFULL
+
+union hv_device_domain_id {
+ u64 as_uint64;
+ struct {
+ u32 type: 4;
+ u32 reserved: 28;
+ u32 id;
+ };
+} __packed;
+
+union hv_input_vtl {
+ u8 as_uint8;
+ struct {
+ u8 target_vtl: 4;
+ u8 use_target_vtl: 1;
+ u8 reserved_z: 3;
+ };
+} __packed;
+
+struct hv_input_device_domain {
+ u64 partition_id;
+ union hv_input_vtl owner_vtl;
+ u8 padding[7];
+ union hv_device_domain_id domain_id;
+} __packed;
+
+union hv_create_device_domain_flags {
+ u32 as_uint32;
+ struct {
+ u32 forward_progress_required: 1;
+ u32 inherit_owning_vtl: 1;
+ u32 reserved: 30;
+ };
+} __packed;
+
+struct hv_input_create_device_domain {
+ struct hv_input_device_domain device_domain;
+ union hv_create_device_domain_flags create_device_domain_flags;
+} __packed;
+
+struct hv_input_delete_device_domain {
+ struct hv_input_device_domain device_domain;
+} __packed;
+
+struct hv_input_attach_device_domain {
+ struct hv_input_device_domain device_domain;
+ union hv_device_id device_id;
+} __packed;
+
+struct hv_input_detach_device_domain {
+ u64 partition_id;
+ union hv_device_id device_id;
+} __packed;
+
+struct hv_input_map_device_gpa_pages {
+ struct hv_input_device_domain device_domain;
+ union hv_input_vtl target_vtl;
+ u8 padding[3];
+ u32 map_flags;
+ u64 target_device_va_base;
+ u64 gpa_page_list[];
+} __packed;
+
+struct hv_input_unmap_device_gpa_pages {
+ struct hv_input_device_domain device_domain;
+ u64 target_device_va_base;
+} __packed;
+
+struct hv_input_query_device_domain {
+ struct hv_input_device_domain device_domain;
+ u64 target_device_va_list[];
+} __packed;
+
+struct hv_device_va_mapping {
+ u64 target_device_va;
+ u64 gpa_page_number;
+} __packed;
+
+struct hv_input_map_sparse_device_gpa_pages {
+ struct hv_input_device_domain device_domain;
+ union hv_input_vtl target_vtl;
+ u32 map_flags;
+ struct hv_device_va_mapping page_list[];
+} __packed;
+
+struct hv_input_unmap_sparse_device_gpa_pages {
+ struct hv_input_device_domain device_domain;
+ u64 target_device_va_list[];
+} __packed;
+
+struct hv_device_domain_settings_x64 {
+ struct {
+ /*
+ * Enable translations. If not enabled, all transaction bypass
+ * S1 translations.
+ */
+ u64 translation_enabled: 1;
+ u64 reserved: 63;
+ } flags;
+ /* Page attribute table */
+ u64 pat;
+ /* Address of translation table */
+ u64 page_table_root;
+} __packed;
+
+struct hv_device_domain_settings {
+ union {
+ struct hv_device_domain_settings_x64 x64;
+ /* ARM TBD */
+ };
+} __packed;
+
+struct hv_input_configure_device_domain {
+ struct hv_input_device_domain device_domain;
+ struct hv_device_domain_settings settings;
+} __packed;
+
#endif
--
2.30.2
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