[PATCH v16 28/34] gunyah: rsc_mgr: Add RPC to set VM boot context

[Elliot Berman <quic_eberman@quicinc.com>]

The initial context of a the primary vCPU can be initialized by
performing RM RPC calls.

Signed-off-by: Elliot Berman <quic_eberman@quicinc.com>
---
 drivers/virt/gunyah/rsc_mgr.h     |  2 ++
 drivers/virt/gunyah/rsc_mgr_rpc.c | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/drivers/virt/gunyah/rsc_mgr.h b/drivers/virt/gunyah/rsc_mgr.h
index 99c2db18579c..2acaf8dff365 100644
--- a/drivers/virt/gunyah/rsc_mgr.h
+++ b/drivers/virt/gunyah/rsc_mgr.h
@@ -84,6 +84,8 @@ int gunyah_rm_vm_configure(struct gunyah_rm *rm, u16 vmid,
 			   u32 mem_handle, u64 image_offset, u64 image_size,
 			   u64 dtb_offset, u64 dtb_size);
 int gunyah_rm_vm_init(struct gunyah_rm *rm, u16 vmid);
+int gunyah_rm_vm_set_boot_context(struct gunyah_rm *rm, u16 vmid, u8 reg_set,
+				  u8 reg_index, u64 value);
 
 struct gunyah_rm_hyp_resource {
 	u8 type;
diff --git a/drivers/virt/gunyah/rsc_mgr_rpc.c b/drivers/virt/gunyah/rsc_mgr_rpc.c
index f4e396fd0d47..bbdae0b05cd4 100644
--- a/drivers/virt/gunyah/rsc_mgr_rpc.c
+++ b/drivers/virt/gunyah/rsc_mgr_rpc.c
@@ -20,6 +20,7 @@
 #define GUNYAH_RM_RPC_VM_RESET			0x56000006
 #define GUNYAH_RM_RPC_VM_CONFIG_IMAGE		0x56000009
 #define GUNYAH_RM_RPC_VM_INIT			0x5600000B
+#define GUNYAH_RM_RPC_VM_SET_BOOT_CONTEXT	0x5600000C
 #define GUNYAH_RM_RPC_VM_GET_HYP_RESOURCES	0x56000020
 #define GUNYAH_RM_RPC_VM_GET_VMID		0x56000024
 #define GUNYAH_RM_RPC_VM_SET_DEMAND_PAGING	0x56000033
@@ -102,6 +103,15 @@ struct gunyah_rm_vm_config_image_req {
 	__le64 dtb_size;
 } __packed;
 
+/* Call: VM_SET_BOOT_CONTEXT */
+struct gunyah_rm_vm_set_boot_context_req {
+	__le16 vmid;
+	u8 reg_set;
+	u8 reg_index;
+	__le32 _padding;
+	__le64 value;
+} __packed;
+
 /* Call: VM_SET_DEMAND_PAGING */
 struct gunyah_rm_vm_set_demand_paging_req {
 	__le16 vmid;
@@ -435,6 +445,28 @@ int gunyah_rm_vm_init(struct gunyah_rm *rm, u16 vmid)
 	return gunyah_rm_common_vmid_call(rm, GUNYAH_RM_RPC_VM_INIT, vmid);
 }
 
+/**
+ * gunyah_rm_vm_set_boot_context() - set the initial boot context of the primary vCPU
+ * @rm: Handle to a Gunyah resource manager
+ * @vmid: VM identifier
+ * @reg_set: See &enum gunyah_vm_boot_context_reg
+ * @reg_index: Which register to set; must be 0 for REG_SET_PC
+ * @value: Value to set in the register
+ */
+int gunyah_rm_vm_set_boot_context(struct gunyah_rm *rm, u16 vmid, u8 reg_set,
+				  u8 reg_index, u64 value)
+{
+	struct gunyah_rm_vm_set_boot_context_req req_payload = {
+		.vmid = cpu_to_le16(vmid),
+		.reg_set = reg_set,
+		.reg_index = reg_index,
+		.value = cpu_to_le64(value),
+	};
+
+	return gunyah_rm_call(rm, GUNYAH_RM_RPC_VM_SET_BOOT_CONTEXT,
+			      &req_payload, sizeof(req_payload), NULL, NULL);
+}
+
 /**
  * gunyah_rm_get_hyp_resources() - Retrieve hypervisor resources (capabilities) associated with a VM
  * @rm: Handle to a Gunyah resource manager

-- 
2.34.1