HV: vuart: refine vuart config

Add vuart config in acrn_vm_config struct, support configuring 2 vuarts for
each VM. The first vuart is used to work as VM's console. The second vuart
is used to connect to other VM's vuart. When the port base for a vuart
is set to 0, hypervisor will not create this vuart.

Tracked-On: #2987
Signed-off-by: Victor Sun <victor.sun@intel.com>
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/arch/x86/Kconfig

@@ -150,15 +150,15 @@ config SERIAL_PIO_BASE
 
 config COM_BASE
 	hex "Base address of the vuart port"
-	depends on !RELEASE
+	default 0 if RELEASE
-	default 0x3f8
+	default 0x3f8 if !RELEASE
 	help
 	  Base address of the vuart port.
 
 config COM_IRQ
 	int "IRQ of the vuart port"
-	depends on !RELEASE
+	default 0 if RELEASE
-	default 4
+	default 4 if !RELEASE
 	help
 	  IRQ of the vuart port.
 

hypervisor/include/arch/x86/vm_config.h

@@ -15,6 +15,7 @@
 #include <vm_configurations.h>
 
 #define PLUG_CPU(n)		(1U << (n))
+#define MAX_VUART_NUM_PER_VM	2U
 
 /*
  * PRE_LAUNCHED_VM is launched by ACRN hypervisor, with LAPIC_PT;
@@ -33,6 +34,32 @@ struct acrn_vm_mem_config {
 	uint64_t size;		/* VM memory size configuration */
 };
 
+struct target_vuart {
+	uint8_t vm_id;		/* target VM id */
+	uint8_t vuart_id;	/* target vuart index in a VM */
+};
+
+enum vuart_type {
+	VUART_LEGACY_PIO = 0,	/* legacy PIO vuart */
+	VUART_PCI,		/* PCI vuart, may removed */
+};
+
+union vuart_addr {
+	uint16_t port_base;		/* addr for legacy type */
+	struct {			/* addr for pci type */
+		uint8_t f : 3;		/* BITs 0-2 */
+		uint8_t d : 5;		/* BITs 3-7 */
+		uint8_t b;		/* BITs 8-15 */
+	} bdf;
+};
+
+struct vuart_config {
+	enum vuart_type type;		/* legacy PIO or PCI  */
+	union vuart_addr addr;		/* port addr if in legacy type, or bdf addr if in pci type */
+	uint16_t irq;
+	struct target_vuart t_vuart;	/* target vuart */
+} __aligned(8);
+
 struct acrn_vm_os_config {
 	char name[MAX_VM_OS_NAME_LEN];			/* OS name, useful for debug */
 	char bootargs[MAX_BOOTARGS_SIZE];		/* boot args/cmdline */
@@ -62,6 +89,7 @@ struct acrn_vm_config {
 	uint16_t clos;					/* if guest_flags has GUEST_FLAG_CLOS_REQUIRED, then VM use this CLOS */
 
 	bool			vm_vuart;
+	struct vuart_config vuart[MAX_VUART_NUM_PER_VM];/* vuart configuration for VM */
 	struct mptable_info	*mptable;		/* Pointer to mptable struct if VM type is pre-launched */
 } __aligned(8);
 

hypervisor/include/debug/vuart.h

@@ -35,6 +35,17 @@
 #define RX_BUF_SIZE		256U
 #define TX_BUF_SIZE		8192U
 
+#define COM1_BASE		0x3F8U
+#define COM2_BASE		0x2F8U
+#define COM3_BASE		0x3E8U
+#define COM4_BASE		0x2E8U
+#define INVALID_COM_BASE	0U
+
+#define COM1_IRQ		4U
+#define COM2_IRQ		3U
+#define COM3_IRQ		6U
+#define COM4_IRQ		7U
+
 struct fifo {
 	char *buf;
 	uint32_t rindex;	/* index to read from */

hypervisor/scenarios/logical_partition/vm_configurations.c

@@ -7,6 +7,7 @@
 #include <vm_config.h>
 #include <vm_configurations.h>
 #include <acrn_common.h>
+#include <vuart.h>
 
 extern struct acrn_vm_pci_ptdev_config vm0_pci_ptdevs[VM0_CONFIG_PCI_PTDEV_NUM];
 extern struct acrn_vm_pci_ptdev_config vm1_pci_ptdevs[VM1_CONFIG_PCI_PTDEV_NUM];
@@ -37,6 +38,18 @@ struct acrn_vm_config vm_configs[CONFIG_MAX_VM_NUM] = {
 				consoleblank=0 tsc=reliable xapic_phys"
 		},
 		.vm_vuart = true,
+		.vuart[0] = {
+			.type = VUART_LEGACY_PIO,
+			.addr.port_base = COM1_BASE,
+			.irq = COM1_IRQ,
+		},
+		.vuart[1] = {
+			.type = VUART_LEGACY_PIO,
+			.addr.port_base = COM2_BASE,
+			.irq = COM2_IRQ,
+			.t_vuart.vm_id = 1U,
+			.t_vuart.vuart_id = 1U,
+		},
 		.pci_ptdev_num = VM0_CONFIG_PCI_PTDEV_NUM,
 		.pci_ptdevs = vm0_pci_ptdevs,
 		.mptable = &vm_mptables[0],
@@ -65,6 +78,18 @@ struct acrn_vm_config vm_configs[CONFIG_MAX_VM_NUM] = {
 				consoleblank=0 tsc=reliable xapic_phys"
 		},
 		.vm_vuart = true,
+		.vuart[0] = {
+			.type = VUART_LEGACY_PIO,
+			.addr.port_base = COM1_BASE,
+			.irq = COM1_IRQ,
+		},
+		.vuart[1] = {
+			.type = VUART_LEGACY_PIO,
+			.addr.port_base = COM2_BASE,
+			.irq = COM2_IRQ,
+			.t_vuart.vm_id = 0U,
+			.t_vuart.vuart_id = 1U,
+		},
 		.pci_ptdev_num = VM1_CONFIG_PCI_PTDEV_NUM,
 		.pci_ptdevs = vm1_pci_ptdevs,
 		.mptable = &vm_mptables[1],

hypervisor/scenarios/sdc/vm_configurations.c

@@ -7,6 +7,7 @@
 #include <vm_config.h>
 #include <vm_configurations.h>
 #include <acrn_common.h>
+#include <vuart.h>
 
 struct acrn_vm_config vm_configs[CONFIG_MAX_VM_NUM] = {
 	{
@@ -24,11 +25,29 @@ struct acrn_vm_config vm_configs[CONFIG_MAX_VM_NUM] = {
 		.os_config = {
 			.name = "ACRN Service OS",
 		},
+		.vuart[0] = {
+			.type = VUART_LEGACY_PIO,
+			.addr.port_base = CONFIG_COM_BASE,
+			.irq = CONFIG_COM_IRQ,
+		},
+		.vuart[1] = {
+			.type = VUART_LEGACY_PIO,
+			.addr.port_base = INVALID_COM_BASE,
+		}
 	},
 	{
 		.type = NORMAL_VM,
 		.uuid = {0xd2U, 0x79U, 0x54U, 0x38U, 0x25U, 0xd6U, 0x11U, 0xe8U,	\
 			 0x86U, 0x4eU, 0xcbU, 0x7aU, 0x18U, 0xb3U, 0x46U, 0x43U},
 			/* d2795438-25d6-11e8-864e-cb7a18b34643 */
+		.vuart[0] = {
+			.type = VUART_LEGACY_PIO,
+			.addr.port_base = INVALID_COM_BASE,
+		},
+		.vuart[1] = {
+			.type = VUART_LEGACY_PIO,
+			.addr.port_base = INVALID_COM_BASE,
+		}
+
 	}
 };