hw/arm/xen_arm.c - qemu - Git at Google

 /*
  * QEMU ARM Xen PVH Machine
  *
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */

 #include "qemu/osdep.h"
 #include "qemu/error-report.h"
 #include "qapi/qapi-commands-migration.h"
 #include "qapi/visitor.h"
 #include "hw/boards.h"
 #include "hw/irq.h"
 #include "hw/sysbus.h"
 #include "sysemu/block-backend.h"
 #include "sysemu/tpm_backend.h"
 #include "sysemu/sysemu.h"
 #include "hw/xen/xen-hvm-common.h"
 #include "sysemu/tpm.h"
 #include "hw/xen/arch_hvm.h"
 #include "trace.h"

 #define TYPE_XEN_ARM  MACHINE_TYPE_NAME("xenpvh")
 OBJECT_DECLARE_SIMPLE_TYPE(XenArmState, XEN_ARM)

 static const MemoryListener xen_memory_listener = {
     .region_add = xen_region_add,
     .region_del = xen_region_del,
     .log_start = NULL,
     .log_stop = NULL,
     .log_sync = NULL,
     .log_global_start = NULL,
     .log_global_stop = NULL,
     .priority = MEMORY_LISTENER_PRIORITY_ACCEL,
 };

 struct XenArmState {
     /*< private >*/
     MachineState parent;

     XenIOState *state;

     struct {
         uint64_t tpm_base_addr;
     } cfg;
 };

 static MemoryRegion ram_lo, ram_hi;

 /*
  * VIRTIO_MMIO_DEV_SIZE is imported from tools/libs/light/libxl_arm.c under Xen
  * repository.
  *
  * Origin: git://xenbits.xen.org/xen.git 2128143c114c
  */
 #define VIRTIO_MMIO_DEV_SIZE   0x200

 #define NR_VIRTIO_MMIO_DEVICES   \
    (GUEST_VIRTIO_MMIO_SPI_LAST - GUEST_VIRTIO_MMIO_SPI_FIRST)

 static void xen_set_irq(void *opaque, int irq, int level)
 {
     if (xendevicemodel_set_irq_level(xen_dmod, xen_domid, irq, level)) {
         error_report("xendevicemodel_set_irq_level failed");
     }
 }

 static void xen_create_virtio_mmio_devices(XenArmState *xam)
 {
     int i;

     for (i = 0; i < NR_VIRTIO_MMIO_DEVICES; i++) {
         hwaddr base = GUEST_VIRTIO_MMIO_BASE + i * VIRTIO_MMIO_DEV_SIZE;
         qemu_irq irq = qemu_allocate_irq(xen_set_irq, NULL,
                                          GUEST_VIRTIO_MMIO_SPI_FIRST + i);

         sysbus_create_simple("virtio-mmio", base, irq);

         trace_xen_create_virtio_mmio_devices(i,
                                              GUEST_VIRTIO_MMIO_SPI_FIRST + i,
                                              base);
     }
 }

 static void xen_init_ram(MachineState *machine)
 {
     MemoryRegion *sysmem = get_system_memory();
     ram_addr_t block_len, ram_size[GUEST_RAM_BANKS];

     trace_xen_init_ram(machine->ram_size);
     if (machine->ram_size <= GUEST_RAM0_SIZE) {
         ram_size[0] = machine->ram_size;
         ram_size[1] = 0;
         block_len = GUEST_RAM0_BASE + ram_size[0];
     } else {
         ram_size[0] = GUEST_RAM0_SIZE;
         ram_size[1] = machine->ram_size - GUEST_RAM0_SIZE;
         block_len = GUEST_RAM1_BASE + ram_size[1];
     }

     memory_region_init_ram(&xen_memory, NULL, "xen.ram", block_len,
                            &error_fatal);

     memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo", &xen_memory,
                              GUEST_RAM0_BASE, ram_size[0]);
     memory_region_add_subregion(sysmem, GUEST_RAM0_BASE, &ram_lo);
     if (ram_size[1] > 0) {
         memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi", &xen_memory,
                                  GUEST_RAM1_BASE, ram_size[1]);
         memory_region_add_subregion(sysmem, GUEST_RAM1_BASE, &ram_hi);
     }

     /* Setup support for grants.  */
     memory_region_init_ram(&xen_grants, NULL, "xen.grants", block_len,
                            &error_fatal);
     memory_region_add_subregion(sysmem, XEN_GRANT_ADDR_OFF, &xen_grants);
 }

 void arch_handle_ioreq(XenIOState *state, ioreq_t *req)
 {
     hw_error("Invalid ioreq type 0x%x\n", req->type);

     return;
 }

 void arch_xen_set_memory(XenIOState *state, MemoryRegionSection *section,
                          bool add)
 {
 }

 void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length)
 {
 }

 void qmp_xen_set_global_dirty_log(bool enable, Error **errp)
 {
 }

 #ifdef CONFIG_TPM
 static void xen_enable_tpm(XenArmState *xam)
 {
     Error *errp = NULL;
     DeviceState *dev;
     SysBusDevice *busdev;

     TPMBackend *be = qemu_find_tpm_be("tpm0");
     if (be == NULL) {
         error_report("Couldn't find tmp0 backend");
         return;
     }
     dev = qdev_new(TYPE_TPM_TIS_SYSBUS);
     object_property_set_link(OBJECT(dev), "tpmdev", OBJECT(be), &errp);
     object_property_set_str(OBJECT(dev), "tpmdev", be->id, &errp);
     busdev = SYS_BUS_DEVICE(dev);
     sysbus_realize_and_unref(busdev, &error_fatal);
     sysbus_mmio_map(busdev, 0, xam->cfg.tpm_base_addr);

     trace_xen_enable_tpm(xam->cfg.tpm_base_addr);
 }
 #endif

 static void xen_arm_init(MachineState *machine)
 {
     XenArmState *xam = XEN_ARM(machine);

     xam->state =  g_new0(XenIOState, 1);

     if (machine->ram_size == 0) {
         warn_report("%s non-zero ram size not specified. QEMU machine started"
                     " without IOREQ (no emulated devices including virtio)",
                     MACHINE_CLASS(object_get_class(OBJECT(machine)))->desc);
         return;
     }

     xen_init_ram(machine);

     xen_register_ioreq(xam->state, machine->smp.cpus, &xen_memory_listener);

     xen_create_virtio_mmio_devices(xam);

 #ifdef CONFIG_TPM
     if (xam->cfg.tpm_base_addr) {
         xen_enable_tpm(xam);
     } else {
         warn_report("tpm-base-addr is not provided. TPM will not be enabled");
     }
 #endif
 }

 #ifdef CONFIG_TPM
 static void xen_arm_get_tpm_base_addr(Object *obj, Visitor *v,
                                       const char *name, void *opaque,
                                       Error **errp)
 {
     XenArmState *xam = XEN_ARM(obj);
     uint64_t value = xam->cfg.tpm_base_addr;

     visit_type_uint64(v, name, &value, errp);
 }

 static void xen_arm_set_tpm_base_addr(Object *obj, Visitor *v,
                                       const char *name, void *opaque,
                                       Error **errp)
 {
     XenArmState *xam = XEN_ARM(obj);
     uint64_t value;

     if (!visit_type_uint64(v, name, &value, errp)) {
         return;
     }

     xam->cfg.tpm_base_addr = value;
 }
 #endif

 static void xen_arm_machine_class_init(ObjectClass *oc, void *data)
 {

     MachineClass *mc = MACHINE_CLASS(oc);
     mc->desc = "Xen Para-virtualized PC";
     mc->init = xen_arm_init;
     mc->max_cpus = 1;
     mc->default_machine_opts = "accel=xen";
     /* Set explicitly here to make sure that real ram_size is passed */
     mc->default_ram_size = 0;

 #ifdef CONFIG_TPM
     object_class_property_add(oc, "tpm-base-addr", "uint64_t",
                               xen_arm_get_tpm_base_addr,
                               xen_arm_set_tpm_base_addr,
                               NULL, NULL);
     object_class_property_set_description(oc, "tpm-base-addr",
                                           "Set Base address for TPM device.");

     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS);
 #endif
 }

 static const TypeInfo xen_arm_machine_type = {
     .name = TYPE_XEN_ARM,
     .parent = TYPE_MACHINE,
     .class_init = xen_arm_machine_class_init,
     .instance_size = sizeof(XenArmState),
 };

 static void xen_arm_machine_register_types(void)
 {
     type_register_static(&xen_arm_machine_type);
 }

 type_init(xen_arm_machine_register_types)
	/*
	* QEMU ARM Xen PVH Machine
	*
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*/

	#include "qemu/osdep.h"
	#include "qemu/error-report.h"
	#include "qapi/qapi-commands-migration.h"
	#include "qapi/visitor.h"
	#include "hw/boards.h"
	#include "hw/irq.h"
	#include "hw/sysbus.h"
	#include "sysemu/block-backend.h"
	#include "sysemu/tpm_backend.h"
	#include "sysemu/sysemu.h"
	#include "hw/xen/xen-hvm-common.h"
	#include "sysemu/tpm.h"
	#include "hw/xen/arch_hvm.h"
	#include "trace.h"

	#define TYPE_XEN_ARM MACHINE_TYPE_NAME("xenpvh")
	OBJECT_DECLARE_SIMPLE_TYPE(XenArmState, XEN_ARM)

	static const MemoryListener xen_memory_listener = {
	.region_add = xen_region_add,
	.region_del = xen_region_del,
	.log_start = NULL,
	.log_stop = NULL,
	.log_sync = NULL,
	.log_global_start = NULL,
	.log_global_stop = NULL,
	.priority = MEMORY_LISTENER_PRIORITY_ACCEL,
	};

	struct XenArmState {
	/< private >/
	MachineState parent;

	XenIOState *state;

	struct {
	uint64_t tpm_base_addr;
	} cfg;
	};

	static MemoryRegion ram_lo, ram_hi;

	/*
	* VIRTIO_MMIO_DEV_SIZE is imported from tools/libs/light/libxl_arm.c under Xen
	* repository.
	*
	* Origin: git://xenbits.xen.org/xen.git 2128143c114c
	*/
	#define VIRTIO_MMIO_DEV_SIZE 0x200

	#define NR_VIRTIO_MMIO_DEVICES \
	(GUEST_VIRTIO_MMIO_SPI_LAST - GUEST_VIRTIO_MMIO_SPI_FIRST)

	static void xen_set_irq(void *opaque, int irq, int level)
	{
	if (xendevicemodel_set_irq_level(xen_dmod, xen_domid, irq, level)) {
	error_report("xendevicemodel_set_irq_level failed");
	}
	}

	static void xen_create_virtio_mmio_devices(XenArmState *xam)
	{
	int i;

	for (i = 0; i < NR_VIRTIO_MMIO_DEVICES; i++) {
	hwaddr base = GUEST_VIRTIO_MMIO_BASE + i * VIRTIO_MMIO_DEV_SIZE;
	qemu_irq irq = qemu_allocate_irq(xen_set_irq, NULL,
	GUEST_VIRTIO_MMIO_SPI_FIRST + i);

	sysbus_create_simple("virtio-mmio", base, irq);

	trace_xen_create_virtio_mmio_devices(i,
	GUEST_VIRTIO_MMIO_SPI_FIRST + i,
	base);
	}
	}

	static void xen_init_ram(MachineState *machine)
	{
	MemoryRegion *sysmem = get_system_memory();
	ram_addr_t block_len, ram_size[GUEST_RAM_BANKS];

	trace_xen_init_ram(machine->ram_size);
	if (machine->ram_size <= GUEST_RAM0_SIZE) {
	ram_size[0] = machine->ram_size;
	ram_size[1] = 0;
	block_len = GUEST_RAM0_BASE + ram_size[0];
	} else {
	ram_size[0] = GUEST_RAM0_SIZE;
	ram_size[1] = machine->ram_size - GUEST_RAM0_SIZE;
	block_len = GUEST_RAM1_BASE + ram_size[1];
	}

	memory_region_init_ram(&xen_memory, NULL, "xen.ram", block_len,
	&error_fatal);

	memory_region_init_alias(&ram_lo, NULL, "xen.ram.lo", &xen_memory,
	GUEST_RAM0_BASE, ram_size[0]);
	memory_region_add_subregion(sysmem, GUEST_RAM0_BASE, &ram_lo);
	if (ram_size[1] > 0) {
	memory_region_init_alias(&ram_hi, NULL, "xen.ram.hi", &xen_memory,
	GUEST_RAM1_BASE, ram_size[1]);
	memory_region_add_subregion(sysmem, GUEST_RAM1_BASE, &ram_hi);
	}

	/* Setup support for grants. */
	memory_region_init_ram(&xen_grants, NULL, "xen.grants", block_len,
	&error_fatal);
	memory_region_add_subregion(sysmem, XEN_GRANT_ADDR_OFF, &xen_grants);
	}

	void arch_handle_ioreq(XenIOState state, ioreq_t req)
	{
	hw_error("Invalid ioreq type 0x%x\n", req->type);

	return;
	}

	void arch_xen_set_memory(XenIOState state, MemoryRegionSection section,
	bool add)
	{
	}

	void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length)
	{
	}

	void qmp_xen_set_global_dirty_log(bool enable, Error **errp)
	{
	}

	#ifdef CONFIG_TPM
	static void xen_enable_tpm(XenArmState *xam)
	{
	Error *errp = NULL;
	DeviceState *dev;
	SysBusDevice *busdev;

	TPMBackend *be = qemu_find_tpm_be("tpm0");
	if (be == NULL) {
	error_report("Couldn't find tmp0 backend");
	return;
	}
	dev = qdev_new(TYPE_TPM_TIS_SYSBUS);
	object_property_set_link(OBJECT(dev), "tpmdev", OBJECT(be), &errp);
	object_property_set_str(OBJECT(dev), "tpmdev", be->id, &errp);
	busdev = SYS_BUS_DEVICE(dev);
	sysbus_realize_and_unref(busdev, &error_fatal);
	sysbus_mmio_map(busdev, 0, xam->cfg.tpm_base_addr);

	trace_xen_enable_tpm(xam->cfg.tpm_base_addr);
	}
	#endif

	static void xen_arm_init(MachineState *machine)
	{
	XenArmState *xam = XEN_ARM(machine);

	xam->state = g_new0(XenIOState, 1);

	if (machine->ram_size == 0) {
	warn_report("%s non-zero ram size not specified. QEMU machine started"
	" without IOREQ (no emulated devices including virtio)",
	MACHINE_CLASS(object_get_class(OBJECT(machine)))->desc);
	return;
	}

	xen_init_ram(machine);

	xen_register_ioreq(xam->state, machine->smp.cpus, &xen_memory_listener);

	xen_create_virtio_mmio_devices(xam);

	#ifdef CONFIG_TPM
	if (xam->cfg.tpm_base_addr) {
	xen_enable_tpm(xam);
	} else {
	warn_report("tpm-base-addr is not provided. TPM will not be enabled");
	}
	#endif
	}

	#ifdef CONFIG_TPM
	static void xen_arm_get_tpm_base_addr(Object obj, Visitor v,
	const char name, void opaque,
	Error **errp)
	{
	XenArmState *xam = XEN_ARM(obj);
	uint64_t value = xam->cfg.tpm_base_addr;

	visit_type_uint64(v, name, &value, errp);
	}

	static void xen_arm_set_tpm_base_addr(Object obj, Visitor v,
	const char name, void opaque,
	Error **errp)
	{
	XenArmState *xam = XEN_ARM(obj);
	uint64_t value;

	if (!visit_type_uint64(v, name, &value, errp)) {
	return;
	}

	xam->cfg.tpm_base_addr = value;
	}
	#endif

	static void xen_arm_machine_class_init(ObjectClass oc, void data)
	{

	MachineClass *mc = MACHINE_CLASS(oc);
	mc->desc = "Xen Para-virtualized PC";
	mc->init = xen_arm_init;
	mc->max_cpus = 1;
	mc->default_machine_opts = "accel=xen";
	/* Set explicitly here to make sure that real ram_size is passed */
	mc->default_ram_size = 0;

	#ifdef CONFIG_TPM
	object_class_property_add(oc, "tpm-base-addr", "uint64_t",
	xen_arm_get_tpm_base_addr,
	xen_arm_set_tpm_base_addr,
	NULL, NULL);
	object_class_property_set_description(oc, "tpm-base-addr",
	"Set Base address for TPM device.");

	machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS);
	#endif
	}

	static const TypeInfo xen_arm_machine_type = {
	.name = TYPE_XEN_ARM,
	.parent = TYPE_MACHINE,
	.class_init = xen_arm_machine_class_init,
	.instance_size = sizeof(XenArmState),
	};

	static void xen_arm_machine_register_types(void)
	{
	type_register_static(&xen_arm_machine_type);
	}

	type_init(xen_arm_machine_register_types)