--- /dev/null
+#include <xen/arm/swiotlb-xen.h>
return;
}
+int xen_swiotlb_detect(void)
+{
+ if (!xen_domain())
+ return 0;
+ if (xen_feature(XENFEAT_direct_mapped))
+ return 1;
+ /* legacy case */
+ if (!xen_feature(XENFEAT_not_direct_mapped) && xen_initial_domain())
+ return 1;
+ return 0;
+}
+
static int __init xen_mm_init(void)
{
struct gnttab_cache_flush cflush;
- if (!xen_initial_domain())
+ if (!xen_swiotlb_detect())
return 0;
xen_swiotlb_init(1, false);
--- /dev/null
+#include <xen/arm/swiotlb-xen.h>
iommu_setup_dma_ops(dev, dma_base, size);
#ifdef CONFIG_XEN
- if (xen_initial_domain())
+ if (xen_swiotlb_detect())
dev->dma_ops = &xen_swiotlb_dma_ops;
#endif
}
struct work_struct free_work;
unsigned int nr_ring_pages;
+ bool multi_ref;
/* All rings for this device. */
struct xen_blkif_ring *rings;
unsigned int nr_rings;
for (i = 0; i < nr_grefs; i++) {
char ring_ref_name[RINGREF_NAME_LEN];
- snprintf(ring_ref_name, RINGREF_NAME_LEN, "ring-ref%u", i);
+ if (blkif->multi_ref)
+ snprintf(ring_ref_name, RINGREF_NAME_LEN, "ring-ref%u", i);
+ else {
+ WARN_ON(i != 0);
+ snprintf(ring_ref_name, RINGREF_NAME_LEN, "ring-ref");
+ }
+
err = xenbus_scanf(XBT_NIL, dir, ring_ref_name,
"%u", &ring_ref[i]);
if (err != 1) {
- if (nr_grefs == 1)
- break;
-
err = -EINVAL;
xenbus_dev_fatal(dev, err, "reading %s/%s",
dir, ring_ref_name);
}
}
- if (err != 1) {
- WARN_ON(nr_grefs != 1);
-
- err = xenbus_scanf(XBT_NIL, dir, "ring-ref", "%u",
- &ring_ref[0]);
- if (err != 1) {
- err = -EINVAL;
- xenbus_dev_fatal(dev, err, "reading %s/ring-ref", dir);
- return err;
- }
- }
-
err = -ENOMEM;
for (i = 0; i < nr_grefs * XEN_BLKIF_REQS_PER_PAGE; i++) {
req = kzalloc(sizeof(*req), GFP_KERNEL);
blkif->nr_rings, blkif->blk_protocol, protocol,
blkif->vbd.feature_gnt_persistent ? "persistent grants" : "");
- ring_page_order = xenbus_read_unsigned(dev->otherend,
- "ring-page-order", 0);
-
- if (ring_page_order > xen_blkif_max_ring_order) {
+ err = xenbus_scanf(XBT_NIL, dev->otherend, "ring-page-order", "%u",
+ &ring_page_order);
+ if (err != 1) {
+ blkif->nr_ring_pages = 1;
+ blkif->multi_ref = false;
+ } else if (ring_page_order <= xen_blkif_max_ring_order) {
+ blkif->nr_ring_pages = 1 << ring_page_order;
+ blkif->multi_ref = true;
+ } else {
err = -EINVAL;
xenbus_dev_fatal(dev, err,
"requested ring page order %d exceed max:%d",
return err;
}
- blkif->nr_ring_pages = 1 << ring_page_order;
-
if (blkif->nr_rings == 1)
return read_per_ring_refs(&blkif->rings[0], dev->otherend);
else {
}
/*
- * physcial-sector-size is a newer field, so old backends may not
+ * physical-sector-size is a newer field, so old backends may not
* provide this. Assume physical sector size to be the same as
* sector_size in that case.
*/
depends on XEN
default m
-config XEN_STUB
- bool "Xen stub drivers"
- depends on XEN && X86_64 && BROKEN
- help
- Allow kernel to install stub drivers, to reserve space for Xen drivers,
- i.e. memory hotplug and cpu hotplug, and to block native drivers loaded,
- so that real Xen drivers can be modular.
-
- To enable Xen features like cpu and memory hotplug, select Y here.
-
-config XEN_ACPI_HOTPLUG_MEMORY
- tristate "Xen ACPI memory hotplug"
- depends on XEN_DOM0 && XEN_STUB && ACPI
- help
- This is Xen ACPI memory hotplug.
-
- Currently Xen only support ACPI memory hot-add. If you want
- to hot-add memory at runtime (the hot-added memory cannot be
- removed until machine stop), select Y/M here, otherwise select N.
-
-config XEN_ACPI_HOTPLUG_CPU
- tristate "Xen ACPI cpu hotplug"
- depends on XEN_DOM0 && XEN_STUB && ACPI
- select ACPI_CONTAINER
- help
- Xen ACPI cpu enumerating and hotplugging
-
- For hotplugging, currently Xen only support ACPI cpu hotadd.
- If you want to hotadd cpu at runtime (the hotadded cpu cannot
- be removed until machine stop), select Y/M here.
-
config XEN_ACPI_PROCESSOR
tristate "Xen ACPI processor"
depends on XEN && XEN_DOM0 && X86 && ACPI_PROCESSOR && CPU_FREQ
obj-$(CONFIG_XEN_MCE_LOG) += mcelog.o
obj-$(CONFIG_XEN_PCIDEV_BACKEND) += xen-pciback/
obj-$(CONFIG_XEN_PRIVCMD) += xen-privcmd.o
-obj-$(CONFIG_XEN_STUB) += xen-stub.o
-obj-$(CONFIG_XEN_ACPI_HOTPLUG_MEMORY) += xen-acpi-memhotplug.o
-obj-$(CONFIG_XEN_ACPI_HOTPLUG_CPU) += xen-acpi-cpuhotplug.o
obj-$(CONFIG_XEN_ACPI_PROCESSOR) += xen-acpi-processor.o
obj-$(CONFIG_XEN_EFI) += efi.o
obj-$(CONFIG_XEN_SCSI_BACKEND) += xen-scsiback.o
return IRQ_HANDLED;
}
-/* Sync with Xen hypervisor after cpu hotadded */
-void xen_pcpu_hotplug_sync(void)
-{
- schedule_work(&xen_pcpu_work);
-}
-EXPORT_SYMBOL_GPL(xen_pcpu_hotplug_sync);
-
-/*
- * For hypervisor presented cpu, return logic cpu id;
- * For hypervisor non-presented cpu, return -ENODEV.
- */
-int xen_pcpu_id(uint32_t acpi_id)
-{
- int cpu_id = 0, max_id = 0;
- struct xen_platform_op op;
-
- op.cmd = XENPF_get_cpuinfo;
- while (cpu_id <= max_id) {
- op.u.pcpu_info.xen_cpuid = cpu_id;
- if (HYPERVISOR_platform_op(&op)) {
- cpu_id++;
- continue;
- }
-
- if (acpi_id == op.u.pcpu_info.acpi_id)
- return cpu_id;
- if (op.u.pcpu_info.max_present > max_id)
- max_id = op.u.pcpu_info.max_present;
- cpu_id++;
- }
-
- return -ENODEV;
-}
-EXPORT_SYMBOL_GPL(xen_pcpu_id);
-
static int __init xen_pcpu_init(void)
{
int irq, ret;
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2012 Intel Corporation
- * Author: Liu Jinsong <jinsong.liu@intel.com>
- * Author: Jiang Yunhong <yunhong.jiang@intel.com>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/cpu.h>
-#include <linux/acpi.h>
-#include <linux/uaccess.h>
-#include <acpi/processor.h>
-#include <xen/acpi.h>
-#include <xen/interface/platform.h>
-#include <asm/xen/hypercall.h>
-
-#define PREFIX "ACPI:xen_cpu_hotplug:"
-
-#define INSTALL_NOTIFY_HANDLER 0
-#define UNINSTALL_NOTIFY_HANDLER 1
-
-static acpi_status xen_acpi_cpu_hotadd(struct acpi_processor *pr);
-
-/* --------------------------------------------------------------------------
- Driver Interface
--------------------------------------------------------------------------- */
-
-static int xen_acpi_processor_enable(struct acpi_device *device)
-{
- acpi_status status = 0;
- unsigned long long value;
- union acpi_object object = { 0 };
- struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
- struct acpi_processor *pr = acpi_driver_data(device);
-
- if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) {
- /* Declared with "Processor" statement; match ProcessorID */
- status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer);
- if (ACPI_FAILURE(status)) {
- pr_err(PREFIX "Evaluating processor object\n");
- return -ENODEV;
- }
-
- pr->acpi_id = object.processor.proc_id;
- } else {
- /* Declared with "Device" statement; match _UID */
- status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID,
- NULL, &value);
- if (ACPI_FAILURE(status)) {
- pr_err(PREFIX "Evaluating processor _UID\n");
- return -ENODEV;
- }
-
- pr->acpi_id = value;
- }
-
- pr->id = xen_pcpu_id(pr->acpi_id);
-
- if (invalid_logical_cpuid(pr->id))
- /* This cpu is not presented at hypervisor, try to hotadd it */
- if (ACPI_FAILURE(xen_acpi_cpu_hotadd(pr))) {
- pr_err(PREFIX "Hotadd CPU (acpi_id = %d) failed.\n",
- pr->acpi_id);
- return -ENODEV;
- }
-
- return 0;
-}
-
-static int xen_acpi_processor_add(struct acpi_device *device)
-{
- int ret;
- struct acpi_processor *pr;
-
- if (!device)
- return -EINVAL;
-
- pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL);
- if (!pr)
- return -ENOMEM;
-
- pr->handle = device->handle;
- strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME);
- strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS);
- device->driver_data = pr;
-
- ret = xen_acpi_processor_enable(device);
- if (ret)
- pr_err(PREFIX "Error when enabling Xen processor\n");
-
- return ret;
-}
-
-static int xen_acpi_processor_remove(struct acpi_device *device)
-{
- struct acpi_processor *pr;
-
- if (!device)
- return -EINVAL;
-
- pr = acpi_driver_data(device);
- if (!pr)
- return -EINVAL;
-
- kfree(pr);
- return 0;
-}
-
-/*--------------------------------------------------------------
- Acpi processor hotplug support
---------------------------------------------------------------*/
-
-static int is_processor_present(acpi_handle handle)
-{
- acpi_status status;
- unsigned long long sta = 0;
-
-
- status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
-
- if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT))
- return 1;
-
- /*
- * _STA is mandatory for a processor that supports hot plug
- */
- if (status == AE_NOT_FOUND)
- pr_info(PREFIX "Processor does not support hot plug\n");
- else
- pr_info(PREFIX "Processor Device is not present");
- return 0;
-}
-
-static int xen_apic_id(acpi_handle handle)
-{
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- union acpi_object *obj;
- struct acpi_madt_local_apic *lapic;
- int apic_id;
-
- if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
- return -EINVAL;
-
- if (!buffer.length || !buffer.pointer)
- return -EINVAL;
-
- obj = buffer.pointer;
- if (obj->type != ACPI_TYPE_BUFFER ||
- obj->buffer.length < sizeof(*lapic)) {
- kfree(buffer.pointer);
- return -EINVAL;
- }
-
- lapic = (struct acpi_madt_local_apic *)obj->buffer.pointer;
-
- if (lapic->header.type != ACPI_MADT_TYPE_LOCAL_APIC ||
- !(lapic->lapic_flags & ACPI_MADT_ENABLED)) {
- kfree(buffer.pointer);
- return -EINVAL;
- }
-
- apic_id = (uint32_t)lapic->id;
- kfree(buffer.pointer);
- buffer.length = ACPI_ALLOCATE_BUFFER;
- buffer.pointer = NULL;
-
- return apic_id;
-}
-
-static int xen_hotadd_cpu(struct acpi_processor *pr)
-{
- int cpu_id, apic_id, pxm;
- struct xen_platform_op op;
-
- apic_id = xen_apic_id(pr->handle);
- if (apic_id < 0) {
- pr_err(PREFIX "Failed to get apic_id for acpi_id %d\n",
- pr->acpi_id);
- return -ENODEV;
- }
-
- pxm = xen_acpi_get_pxm(pr->handle);
- if (pxm < 0) {
- pr_err(PREFIX "Failed to get _PXM for acpi_id %d\n",
- pr->acpi_id);
- return pxm;
- }
-
- op.cmd = XENPF_cpu_hotadd;
- op.u.cpu_add.apic_id = apic_id;
- op.u.cpu_add.acpi_id = pr->acpi_id;
- op.u.cpu_add.pxm = pxm;
-
- cpu_id = HYPERVISOR_platform_op(&op);
- if (cpu_id < 0)
- pr_err(PREFIX "Failed to hotadd CPU for acpi_id %d\n",
- pr->acpi_id);
-
- return cpu_id;
-}
-
-static acpi_status xen_acpi_cpu_hotadd(struct acpi_processor *pr)
-{
- if (!is_processor_present(pr->handle))
- return AE_ERROR;
-
- pr->id = xen_hotadd_cpu(pr);
- if (invalid_logical_cpuid(pr->id))
- return AE_ERROR;
-
- /*
- * Sync with Xen hypervisor, providing new /sys/.../xen_cpuX
- * interface after cpu hotadded.
- */
- xen_pcpu_hotplug_sync();
-
- return AE_OK;
-}
-
-static int acpi_processor_device_remove(struct acpi_device *device)
-{
- pr_debug(PREFIX "Xen does not support CPU hotremove\n");
-
- return -ENOSYS;
-}
-
-static void acpi_processor_hotplug_notify(acpi_handle handle,
- u32 event, void *data)
-{
- struct acpi_processor *pr;
- struct acpi_device *device = NULL;
- u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
- int result;
-
- acpi_scan_lock_acquire();
-
- switch (event) {
- case ACPI_NOTIFY_BUS_CHECK:
- case ACPI_NOTIFY_DEVICE_CHECK:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Processor driver received %s event\n",
- (event == ACPI_NOTIFY_BUS_CHECK) ?
- "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"));
-
- if (!is_processor_present(handle))
- break;
-
- acpi_bus_get_device(handle, &device);
- if (acpi_device_enumerated(device))
- break;
-
- result = acpi_bus_scan(handle);
- if (result) {
- pr_err(PREFIX "Unable to add the device\n");
- break;
- }
- device = NULL;
- acpi_bus_get_device(handle, &device);
- if (!acpi_device_enumerated(device)) {
- pr_err(PREFIX "Missing device object\n");
- break;
- }
- ost_code = ACPI_OST_SC_SUCCESS;
- break;
-
- case ACPI_NOTIFY_EJECT_REQUEST:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "received ACPI_NOTIFY_EJECT_REQUEST\n"));
-
- if (acpi_bus_get_device(handle, &device)) {
- pr_err(PREFIX "Device don't exist, dropping EJECT\n");
- break;
- }
- pr = acpi_driver_data(device);
- if (!pr) {
- pr_err(PREFIX "Driver data is NULL, dropping EJECT\n");
- break;
- }
-
- /*
- * TBD: implement acpi_processor_device_remove if Xen support
- * CPU hotremove in the future.
- */
- acpi_processor_device_remove(device);
- break;
-
- default:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Unsupported event [0x%x]\n", event));
-
- /* non-hotplug event; possibly handled by other handler */
- goto out;
- }
-
- (void) acpi_evaluate_ost(handle, event, ost_code, NULL);
-
-out:
- acpi_scan_lock_release();
-}
-
-static acpi_status is_processor_device(acpi_handle handle)
-{
- struct acpi_device_info *info;
- char *hid;
- acpi_status status;
-
- status = acpi_get_object_info(handle, &info);
- if (ACPI_FAILURE(status))
- return status;
-
- if (info->type == ACPI_TYPE_PROCESSOR) {
- kfree(info);
- return AE_OK; /* found a processor object */
- }
-
- if (!(info->valid & ACPI_VALID_HID)) {
- kfree(info);
- return AE_ERROR;
- }
-
- hid = info->hardware_id.string;
- if ((hid == NULL) || strcmp(hid, ACPI_PROCESSOR_DEVICE_HID)) {
- kfree(info);
- return AE_ERROR;
- }
-
- kfree(info);
- return AE_OK; /* found a processor device object */
-}
-
-static acpi_status
-processor_walk_namespace_cb(acpi_handle handle,
- u32 lvl, void *context, void **rv)
-{
- acpi_status status;
- int *action = context;
-
- status = is_processor_device(handle);
- if (ACPI_FAILURE(status))
- return AE_OK; /* not a processor; continue to walk */
-
- switch (*action) {
- case INSTALL_NOTIFY_HANDLER:
- acpi_install_notify_handler(handle,
- ACPI_SYSTEM_NOTIFY,
- acpi_processor_hotplug_notify,
- NULL);
- break;
- case UNINSTALL_NOTIFY_HANDLER:
- acpi_remove_notify_handler(handle,
- ACPI_SYSTEM_NOTIFY,
- acpi_processor_hotplug_notify);
- break;
- default:
- break;
- }
-
- /* found a processor; skip walking underneath */
- return AE_CTRL_DEPTH;
-}
-
-static
-void acpi_processor_install_hotplug_notify(void)
-{
- int action = INSTALL_NOTIFY_HANDLER;
- acpi_walk_namespace(ACPI_TYPE_ANY,
- ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX,
- processor_walk_namespace_cb, NULL, &action, NULL);
-}
-
-static
-void acpi_processor_uninstall_hotplug_notify(void)
-{
- int action = UNINSTALL_NOTIFY_HANDLER;
- acpi_walk_namespace(ACPI_TYPE_ANY,
- ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX,
- processor_walk_namespace_cb, NULL, &action, NULL);
-}
-
-static const struct acpi_device_id processor_device_ids[] = {
- {ACPI_PROCESSOR_OBJECT_HID, 0},
- {ACPI_PROCESSOR_DEVICE_HID, 0},
- {"", 0},
-};
-MODULE_DEVICE_TABLE(acpi, processor_device_ids);
-
-static struct acpi_driver xen_acpi_processor_driver = {
- .name = "processor",
- .class = ACPI_PROCESSOR_CLASS,
- .ids = processor_device_ids,
- .ops = {
- .add = xen_acpi_processor_add,
- .remove = xen_acpi_processor_remove,
- },
-};
-
-static int __init xen_acpi_processor_init(void)
-{
- int result = 0;
-
- if (!xen_initial_domain())
- return -ENODEV;
-
- /* unregister the stub which only used to reserve driver space */
- xen_stub_processor_exit();
-
- result = acpi_bus_register_driver(&xen_acpi_processor_driver);
- if (result < 0) {
- xen_stub_processor_init();
- return result;
- }
-
- acpi_processor_install_hotplug_notify();
- return 0;
-}
-
-static void __exit xen_acpi_processor_exit(void)
-{
- if (!xen_initial_domain())
- return;
-
- acpi_processor_uninstall_hotplug_notify();
-
- acpi_bus_unregister_driver(&xen_acpi_processor_driver);
-
- /*
- * stub reserve space again to prevent any chance of native
- * driver loading.
- */
- xen_stub_processor_init();
- return;
-}
-
-module_init(xen_acpi_processor_init);
-module_exit(xen_acpi_processor_exit);
-ACPI_MODULE_NAME("xen-acpi-cpuhotplug");
-MODULE_AUTHOR("Liu Jinsong <jinsong.liu@intel.com>");
-MODULE_DESCRIPTION("Xen Hotplug CPU Driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2012 Intel Corporation
- * Author: Liu Jinsong <jinsong.liu@intel.com>
- * Author: Jiang Yunhong <yunhong.jiang@intel.com>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/acpi.h>
-#include <xen/acpi.h>
-#include <xen/interface/platform.h>
-#include <asm/xen/hypercall.h>
-
-#define PREFIX "ACPI:xen_memory_hotplug:"
-
-struct acpi_memory_info {
- struct list_head list;
- u64 start_addr; /* Memory Range start physical addr */
- u64 length; /* Memory Range length */
- unsigned short caching; /* memory cache attribute */
- unsigned short write_protect; /* memory read/write attribute */
- /* copied from buffer getting from _CRS */
- unsigned int enabled:1;
-};
-
-struct acpi_memory_device {
- struct acpi_device *device;
- struct list_head res_list;
-};
-
-static bool acpi_hotmem_initialized __read_mostly;
-
-static int xen_hotadd_memory(int pxm, struct acpi_memory_info *info)
-{
- int rc;
- struct xen_platform_op op;
-
- op.cmd = XENPF_mem_hotadd;
- op.u.mem_add.spfn = info->start_addr >> PAGE_SHIFT;
- op.u.mem_add.epfn = (info->start_addr + info->length) >> PAGE_SHIFT;
- op.u.mem_add.pxm = pxm;
-
- rc = HYPERVISOR_dom0_op(&op);
- if (rc)
- pr_err(PREFIX "Xen Hotplug Memory Add failed on "
- "0x%lx -> 0x%lx, _PXM: %d, error: %d\n",
- (unsigned long)info->start_addr,
- (unsigned long)(info->start_addr + info->length),
- pxm, rc);
-
- return rc;
-}
-
-static int xen_acpi_memory_enable_device(struct acpi_memory_device *mem_device)
-{
- int pxm, result;
- int num_enabled = 0;
- struct acpi_memory_info *info;
-
- if (!mem_device)
- return -EINVAL;
-
- pxm = xen_acpi_get_pxm(mem_device->device->handle);
- if (pxm < 0)
- return pxm;
-
- list_for_each_entry(info, &mem_device->res_list, list) {
- if (info->enabled) { /* just sanity check...*/
- num_enabled++;
- continue;
- }
-
- if (!info->length)
- continue;
-
- result = xen_hotadd_memory(pxm, info);
- if (result)
- continue;
- info->enabled = 1;
- num_enabled++;
- }
-
- if (!num_enabled)
- return -ENODEV;
-
- return 0;
-}
-
-static acpi_status
-acpi_memory_get_resource(struct acpi_resource *resource, void *context)
-{
- struct acpi_memory_device *mem_device = context;
- struct acpi_resource_address64 address64;
- struct acpi_memory_info *info, *new;
- acpi_status status;
-
- status = acpi_resource_to_address64(resource, &address64);
- if (ACPI_FAILURE(status) ||
- (address64.resource_type != ACPI_MEMORY_RANGE))
- return AE_OK;
-
- list_for_each_entry(info, &mem_device->res_list, list) {
- if ((info->caching == address64.info.mem.caching) &&
- (info->write_protect == address64.info.mem.write_protect) &&
- (info->start_addr + info->length == address64.address.minimum)) {
- info->length += address64.address.address_length;
- return AE_OK;
- }
- }
-
- new = kzalloc(sizeof(struct acpi_memory_info), GFP_KERNEL);
- if (!new)
- return AE_ERROR;
-
- INIT_LIST_HEAD(&new->list);
- new->caching = address64.info.mem.caching;
- new->write_protect = address64.info.mem.write_protect;
- new->start_addr = address64.address.minimum;
- new->length = address64.address.address_length;
- list_add_tail(&new->list, &mem_device->res_list);
-
- return AE_OK;
-}
-
-static int
-acpi_memory_get_device_resources(struct acpi_memory_device *mem_device)
-{
- acpi_status status;
- struct acpi_memory_info *info, *n;
-
- if (!list_empty(&mem_device->res_list))
- return 0;
-
- status = acpi_walk_resources(mem_device->device->handle,
- METHOD_NAME__CRS, acpi_memory_get_resource, mem_device);
-
- if (ACPI_FAILURE(status)) {
- list_for_each_entry_safe(info, n, &mem_device->res_list, list)
- kfree(info);
- INIT_LIST_HEAD(&mem_device->res_list);
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int acpi_memory_get_device(acpi_handle handle,
- struct acpi_memory_device **mem_device)
-{
- struct acpi_device *device = NULL;
- int result = 0;
-
- acpi_scan_lock_acquire();
-
- acpi_bus_get_device(handle, &device);
- if (acpi_device_enumerated(device))
- goto end;
-
- /*
- * Now add the notified device. This creates the acpi_device
- * and invokes .add function
- */
- result = acpi_bus_scan(handle);
- if (result) {
- pr_warn(PREFIX "ACPI namespace scan failed\n");
- result = -EINVAL;
- goto out;
- }
- device = NULL;
- acpi_bus_get_device(handle, &device);
- if (!acpi_device_enumerated(device)) {
- pr_warn(PREFIX "Missing device object\n");
- result = -EINVAL;
- goto out;
- }
-
-end:
- *mem_device = acpi_driver_data(device);
- if (!(*mem_device)) {
- pr_err(PREFIX "driver data not found\n");
- result = -ENODEV;
- goto out;
- }
-
-out:
- acpi_scan_lock_release();
- return result;
-}
-
-static int acpi_memory_check_device(struct acpi_memory_device *mem_device)
-{
- unsigned long long current_status;
-
- /* Get device present/absent information from the _STA */
- if (ACPI_FAILURE(acpi_evaluate_integer(mem_device->device->handle,
- "_STA", NULL, ¤t_status)))
- return -ENODEV;
- /*
- * Check for device status. Device should be
- * present/enabled/functioning.
- */
- if (!((current_status & ACPI_STA_DEVICE_PRESENT)
- && (current_status & ACPI_STA_DEVICE_ENABLED)
- && (current_status & ACPI_STA_DEVICE_FUNCTIONING)))
- return -ENODEV;
-
- return 0;
-}
-
-static int acpi_memory_disable_device(struct acpi_memory_device *mem_device)
-{
- pr_debug(PREFIX "Xen does not support memory hotremove\n");
-
- return -ENOSYS;
-}
-
-static void acpi_memory_device_notify(acpi_handle handle, u32 event, void *data)
-{
- struct acpi_memory_device *mem_device;
- struct acpi_device *device;
- u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
-
- switch (event) {
- case ACPI_NOTIFY_BUS_CHECK:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "\nReceived BUS CHECK notification for device\n"));
- fallthrough;
- case ACPI_NOTIFY_DEVICE_CHECK:
- if (event == ACPI_NOTIFY_DEVICE_CHECK)
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "\nReceived DEVICE CHECK notification for device\n"));
-
- if (acpi_memory_get_device(handle, &mem_device)) {
- pr_err(PREFIX "Cannot find driver data\n");
- break;
- }
-
- ost_code = ACPI_OST_SC_SUCCESS;
- break;
-
- case ACPI_NOTIFY_EJECT_REQUEST:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "\nReceived EJECT REQUEST notification for device\n"));
-
- acpi_scan_lock_acquire();
- if (acpi_bus_get_device(handle, &device)) {
- acpi_scan_lock_release();
- pr_err(PREFIX "Device doesn't exist\n");
- break;
- }
- mem_device = acpi_driver_data(device);
- if (!mem_device) {
- acpi_scan_lock_release();
- pr_err(PREFIX "Driver Data is NULL\n");
- break;
- }
-
- /*
- * TBD: implement acpi_memory_disable_device and invoke
- * acpi_bus_remove if Xen support hotremove in the future
- */
- acpi_memory_disable_device(mem_device);
- acpi_scan_lock_release();
- break;
-
- default:
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Unsupported event [0x%x]\n", event));
- /* non-hotplug event; possibly handled by other handler */
- return;
- }
-
- (void) acpi_evaluate_ost(handle, event, ost_code, NULL);
- return;
-}
-
-static int xen_acpi_memory_device_add(struct acpi_device *device)
-{
- int result;
- struct acpi_memory_device *mem_device = NULL;
-
-
- if (!device)
- return -EINVAL;
-
- mem_device = kzalloc(sizeof(struct acpi_memory_device), GFP_KERNEL);
- if (!mem_device)
- return -ENOMEM;
-
- INIT_LIST_HEAD(&mem_device->res_list);
- mem_device->device = device;
- sprintf(acpi_device_name(device), "%s", ACPI_MEMORY_DEVICE_NAME);
- sprintf(acpi_device_class(device), "%s", ACPI_MEMORY_DEVICE_CLASS);
- device->driver_data = mem_device;
-
- /* Get the range from the _CRS */
- result = acpi_memory_get_device_resources(mem_device);
- if (result) {
- kfree(mem_device);
- return result;
- }
-
- /*
- * For booting existed memory devices, early boot code has recognized
- * memory area by EFI/E820. If DSDT shows these memory devices on boot,
- * hotplug is not necessary for them.
- * For hot-added memory devices during runtime, it need hypercall to
- * Xen hypervisor to add memory.
- */
- if (!acpi_hotmem_initialized)
- return 0;
-
- if (!acpi_memory_check_device(mem_device))
- result = xen_acpi_memory_enable_device(mem_device);
-
- return result;
-}
-
-static int xen_acpi_memory_device_remove(struct acpi_device *device)
-{
- struct acpi_memory_device *mem_device = NULL;
-
- if (!device || !acpi_driver_data(device))
- return -EINVAL;
-
- mem_device = acpi_driver_data(device);
- kfree(mem_device);
-
- return 0;
-}
-
-/*
- * Helper function to check for memory device
- */
-static acpi_status is_memory_device(acpi_handle handle)
-{
- char *hardware_id;
- acpi_status status;
- struct acpi_device_info *info;
-
- status = acpi_get_object_info(handle, &info);
- if (ACPI_FAILURE(status))
- return status;
-
- if (!(info->valid & ACPI_VALID_HID)) {
- kfree(info);
- return AE_ERROR;
- }
-
- hardware_id = info->hardware_id.string;
- if ((hardware_id == NULL) ||
- (strcmp(hardware_id, ACPI_MEMORY_DEVICE_HID)))
- status = AE_ERROR;
-
- kfree(info);
- return status;
-}
-
-static acpi_status
-acpi_memory_register_notify_handler(acpi_handle handle,
- u32 level, void *ctxt, void **retv)
-{
- acpi_status status;
-
- status = is_memory_device(handle);
- if (ACPI_FAILURE(status))
- return AE_OK; /* continue */
-
- status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
- acpi_memory_device_notify, NULL);
- /* continue */
- return AE_OK;
-}
-
-static acpi_status
-acpi_memory_deregister_notify_handler(acpi_handle handle,
- u32 level, void *ctxt, void **retv)
-{
- acpi_status status;
-
- status = is_memory_device(handle);
- if (ACPI_FAILURE(status))
- return AE_OK; /* continue */
-
- status = acpi_remove_notify_handler(handle,
- ACPI_SYSTEM_NOTIFY,
- acpi_memory_device_notify);
-
- return AE_OK; /* continue */
-}
-
-static const struct acpi_device_id memory_device_ids[] = {
- {ACPI_MEMORY_DEVICE_HID, 0},
- {"", 0},
-};
-MODULE_DEVICE_TABLE(acpi, memory_device_ids);
-
-static struct acpi_driver xen_acpi_memory_device_driver = {
- .name = "acpi_memhotplug",
- .class = ACPI_MEMORY_DEVICE_CLASS,
- .ids = memory_device_ids,
- .ops = {
- .add = xen_acpi_memory_device_add,
- .remove = xen_acpi_memory_device_remove,
- },
-};
-
-static int __init xen_acpi_memory_device_init(void)
-{
- int result;
- acpi_status status;
-
- if (!xen_initial_domain())
- return -ENODEV;
-
- /* unregister the stub which only used to reserve driver space */
- xen_stub_memory_device_exit();
-
- result = acpi_bus_register_driver(&xen_acpi_memory_device_driver);
- if (result < 0) {
- xen_stub_memory_device_init();
- return -ENODEV;
- }
-
- status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX,
- acpi_memory_register_notify_handler,
- NULL, NULL, NULL);
-
- if (ACPI_FAILURE(status)) {
- pr_warn(PREFIX "walk_namespace failed\n");
- acpi_bus_unregister_driver(&xen_acpi_memory_device_driver);
- xen_stub_memory_device_init();
- return -ENODEV;
- }
-
- acpi_hotmem_initialized = true;
- return 0;
-}
-
-static void __exit xen_acpi_memory_device_exit(void)
-{
- acpi_status status;
-
- if (!xen_initial_domain())
- return;
-
- status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX,
- acpi_memory_deregister_notify_handler,
- NULL, NULL, NULL);
- if (ACPI_FAILURE(status))
- pr_warn(PREFIX "walk_namespace failed\n");
-
- acpi_bus_unregister_driver(&xen_acpi_memory_device_driver);
-
- /*
- * stub reserve space again to prevent any chance of native
- * driver loading.
- */
- xen_stub_memory_device_init();
- return;
-}
-
-module_init(xen_acpi_memory_device_init);
-module_exit(xen_acpi_memory_device_exit);
-ACPI_MODULE_NAME("xen-acpi-memhotplug");
-MODULE_AUTHOR("Liu Jinsong <jinsong.liu@intel.com>");
-MODULE_DESCRIPTION("Xen Hotplug Mem Driver");
-MODULE_LICENSE("GPL");
"guest with no AER driver should have been killed\n");
goto end;
}
- result = common_process(psdev, 1, XEN_PCI_OP_aer_slotreset, result);
+ result = common_process(psdev, pci_channel_io_normal, XEN_PCI_OP_aer_slotreset, result);
if (result == PCI_ERS_RESULT_NONE ||
result == PCI_ERS_RESULT_DISCONNECT) {
"guest with no AER driver should have been killed\n");
goto end;
}
- result = common_process(psdev, 1, XEN_PCI_OP_aer_mmio, result);
+ result = common_process(psdev, pci_channel_io_normal, XEN_PCI_OP_aer_mmio, result);
if (result == PCI_ERS_RESULT_NONE ||
result == PCI_ERS_RESULT_DISCONNECT) {
kill_domain_by_device(psdev);
goto end;
}
- common_process(psdev, 1, XEN_PCI_OP_aer_resume,
+ common_process(psdev, pci_channel_io_normal, XEN_PCI_OP_aer_resume,
PCI_ERS_RESULT_RECOVERED);
end:
if (psdev)
unsigned int *devfn)
{
struct pci_dev_entry *entry;
- struct pci_dev *dev = NULL;
struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
int found = 0, slot;
list_for_each_entry(entry,
&vpci_dev->dev_list[slot],
list) {
- dev = entry->dev;
- if (dev && dev->bus->number == pcidev->bus->number
- && pci_domain_nr(dev->bus) ==
- pci_domain_nr(pcidev->bus)
- && dev->devfn == pcidev->devfn) {
+ if (entry->dev == pcidev) {
found = 1;
*domain = 0;
*bus = 0;
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * xen-stub.c - stub drivers to reserve space for Xen
- *
- * Copyright (C) 2012 Intel Corporation
- * Author: Liu Jinsong <jinsong.liu@intel.com>
- * Author: Jiang Yunhong <yunhong.jiang@intel.com>
- *
- * Copyright (C) 2012 Oracle Inc
- * Author: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/export.h>
-#include <linux/types.h>
-#include <linux/acpi.h>
-#include <xen/acpi.h>
-
-#ifdef CONFIG_ACPI
-
-/*--------------------------------------------
- stub driver for Xen memory hotplug
---------------------------------------------*/
-
-static const struct acpi_device_id memory_device_ids[] = {
- {ACPI_MEMORY_DEVICE_HID, 0},
- {"", 0},
-};
-
-static struct acpi_driver xen_stub_memory_device_driver = {
- /* same name as native memory driver to block native loaded */
- .name = "acpi_memhotplug",
- .class = ACPI_MEMORY_DEVICE_CLASS,
- .ids = memory_device_ids,
-};
-
-int xen_stub_memory_device_init(void)
-{
- if (!xen_initial_domain())
- return -ENODEV;
-
- /* just reserve space for Xen, block native driver loaded */
- return acpi_bus_register_driver(&xen_stub_memory_device_driver);
-}
-EXPORT_SYMBOL_GPL(xen_stub_memory_device_init);
-subsys_initcall(xen_stub_memory_device_init);
-
-void xen_stub_memory_device_exit(void)
-{
- acpi_bus_unregister_driver(&xen_stub_memory_device_driver);
-}
-EXPORT_SYMBOL_GPL(xen_stub_memory_device_exit);
-
-
-/*--------------------------------------------
- stub driver for Xen cpu hotplug
---------------------------------------------*/
-
-static const struct acpi_device_id processor_device_ids[] = {
- {ACPI_PROCESSOR_OBJECT_HID, 0},
- {ACPI_PROCESSOR_DEVICE_HID, 0},
- {"", 0},
-};
-
-static struct acpi_driver xen_stub_processor_driver = {
- /* same name as native processor driver to block native loaded */
- .name = "processor",
- .class = ACPI_PROCESSOR_CLASS,
- .ids = processor_device_ids,
-};
-
-int xen_stub_processor_init(void)
-{
- if (!xen_initial_domain())
- return -ENODEV;
-
- /* just reserve space for Xen, block native driver loaded */
- return acpi_bus_register_driver(&xen_stub_processor_driver);
-}
-EXPORT_SYMBOL_GPL(xen_stub_processor_init);
-subsys_initcall(xen_stub_processor_init);
-
-void xen_stub_processor_exit(void)
-{
- acpi_bus_unregister_driver(&xen_stub_processor_driver);
-}
-EXPORT_SYMBOL_GPL(xen_stub_processor_exit);
-
-#endif
#include <xen/xen.h>
#include <linux/acpi.h>
-#define ACPI_MEMORY_DEVICE_CLASS "memory"
-#define ACPI_MEMORY_DEVICE_HID "PNP0C80"
-#define ACPI_MEMORY_DEVICE_NAME "Hotplug Mem Device"
-
-int xen_stub_memory_device_init(void);
-void xen_stub_memory_device_exit(void);
-
-#define ACPI_PROCESSOR_CLASS "processor"
-#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
-#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
-
-int xen_stub_processor_init(void);
-void xen_stub_processor_exit(void);
-
-void xen_pcpu_hotplug_sync(void);
-int xen_pcpu_id(uint32_t acpi_id);
-
-static inline int xen_acpi_get_pxm(acpi_handle h)
-{
- unsigned long long pxm;
- acpi_status status;
- acpi_handle handle;
- acpi_handle phandle = h;
-
- do {
- handle = phandle;
- status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
- if (ACPI_SUCCESS(status))
- return pxm;
- status = acpi_get_parent(handle, &phandle);
- } while (ACPI_SUCCESS(status));
-
- return -ENXIO;
-}
-
int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
u32 pm1a_cnt, u32 pm1b_cnd);
int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_ARM_SWIOTLB_XEN_H
+#define _ASM_ARM_SWIOTLB_XEN_H
+
+extern int xen_swiotlb_detect(void);
+
+#endif /* _ASM_ARM_SWIOTLB_XEN_H */
*/
#define XENFEAT_linux_rsdp_unrestricted 15
+/*
+ * A direct-mapped (or 1:1 mapped) domain is a domain for which its
+ * local pages have gfn == mfn. If a domain is direct-mapped,
+ * XENFEAT_direct_mapped is set; otherwise XENFEAT_not_direct_mapped
+ * is set.
+ *
+ * If neither flag is set (e.g. older Xen releases) the assumptions are:
+ * - not auto_translated domains (x86 only) are always direct-mapped
+ * - on x86, auto_translated domains are not direct-mapped
+ * - on ARM, Dom0 is direct-mapped, DomUs are not
+ */
+#define XENFEAT_not_direct_mapped 16
+#define XENFEAT_direct_mapped 17
+
#define XENFEAT_NR_SUBMAPS 1
#endif /* __XEN_PUBLIC_FEATURES_H__ */
#define __LINUX_SWIOTLB_XEN_H
#include <linux/swiotlb.h>
+#include <asm/xen/swiotlb-xen.h>
void xen_dma_sync_for_cpu(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir);
projects / linux-2.6-microblaze.git / commitdiff