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xen: features and fixes for 4.8-rc0

Browse source 
- ACPI support for guests on ARM platforms.
 - Generic steal time support for arm and x86.
 - Support cases where kernel cpu is not Xen VCPU number (e.g., if
   in-guest kexec is used).
 - Use the system workqueue instead of a custom workqueue in various
   places.
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Merge tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from David Vrabel:
 "Features and fixes for 4.8-rc0:

   - ACPI support for guests on ARM platforms.
   - Generic steal time support for arm and x86.
   - Support cases where kernel cpu is not Xen VCPU number (e.g., if
     in-guest kexec is used).
   - Use the system workqueue instead of a custom workqueue in various
     places"

* tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (47 commits)
  xen: add static initialization of steal_clock op to xen_time_ops
  xen/pvhvm: run xen_vcpu_setup() for the boot CPU
  xen/evtchn: use xen_vcpu_id mapping
  xen/events: fifo: use xen_vcpu_id mapping
  xen/events: use xen_vcpu_id mapping in events_base
  x86/xen: use xen_vcpu_id mapping when pointing vcpu_info to shared_info
  x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_op
  xen: introduce xen_vcpu_id mapping
  x86/acpi: store ACPI ids from MADT for future usage
  x86/xen: update cpuid.h from Xen-4.7
  xen/evtchn: add IOCTL_EVTCHN_RESTRICT
  xen-blkback: really don't leak mode property
  xen-blkback: constify instance of "struct attribute_group"
  xen-blkfront: prefer xenbus_scanf() over xenbus_gather()
  xen-blkback: prefer xenbus_scanf() over xenbus_gather()
  xen: support runqueue steal time on xen
  arm/xen: add support for vm_assist hypercall
  xen: update xen headers
  xen-pciback: drop superfluous variables
  xen-pciback: short-circuit read path used for merging write values
  ...
This commit is contained in:
Linus Torvalds 2016-07-27 11:35:37 -07:00
commit 08fd8c1768
59 changed files with 1150 additions and 493 deletions
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74
drivers/acpi/scan.c
View file

@ -46,6 +46,13 @@ DEFINE_MUTEX(acpi_device_lock);
LIST_HEAD(acpi_wakeup_device_list);
static DEFINE_MUTEX(acpi_hp_context_lock);
/*
* The UART device described by the SPCR table is the only object which needs
* special-casing. Everything else is covered by ACPI namespace paths in STAO
* table.
*/
static u64 spcr_uart_addr;
struct acpi_dep_data {
struct list_head node;
acpi_handle master;
@ -1458,6 +1465,41 @@ static int acpi_add_single_object(struct acpi_device **child,
return 0;
}
static acpi_status acpi_get_resource_memory(struct acpi_resource *ares,
void *context)
{
struct resource *res = context;
if (acpi_dev_resource_memory(ares, res))
return AE_CTRL_TERMINATE;
return AE_OK;
}
static bool acpi_device_should_be_hidden(acpi_handle handle)
{
acpi_status status;
struct resource res;
/* Check if it should ignore the UART device */
if (!(spcr_uart_addr && acpi_has_method(handle, METHOD_NAME__CRS)))
return false;
/*
* The UART device described in SPCR table is assumed to have only one
* memory resource present. So we only look for the first one here.
*/
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
acpi_get_resource_memory, &res);
if (ACPI_FAILURE(status) || res.start != spcr_uart_addr)
return false;
acpi_handle_info(handle, "The UART device @%pa in SPCR table will be hidden\n",
&res.start);
return true;
}
static int acpi_bus_type_and_status(acpi_handle handle, int *type,
unsigned long long *sta)
{
@ -1471,6 +1513,9 @@ static int acpi_bus_type_and_status(acpi_handle handle, int *type,
switch (acpi_type) {
case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */
case ACPI_TYPE_DEVICE:
if (acpi_device_should_be_hidden(handle))
return -ENODEV;
*type = ACPI_BUS_TYPE_DEVICE;
status = acpi_bus_get_status_handle(handle, sta);
if (ACPI_FAILURE(status))
@ -1925,11 +1970,26 @@ static int acpi_bus_scan_fixed(void)
return result < 0 ? result : 0;
}
static void __init acpi_get_spcr_uart_addr(void)
{
acpi_status status;
struct acpi_table_spcr *spcr_ptr;
status = acpi_get_table(ACPI_SIG_SPCR, 0,
(struct acpi_table_header **)&spcr_ptr);
if (ACPI_SUCCESS(status))
spcr_uart_addr = spcr_ptr->serial_port.address;
else
printk(KERN_WARNING PREFIX "STAO table present, but SPCR is missing\n");
}
static bool acpi_scan_initialized;
int __init acpi_scan_init(void)
{
int result;
acpi_status status;
struct acpi_table_stao *stao_ptr;
acpi_pci_root_init();
acpi_pci_link_init();
@ -1945,6 +2005,20 @@ int __init acpi_scan_init(void)
acpi_scan_add_handler(&generic_device_handler);
/*
* If there is STAO table, check whether it needs to ignore the UART
* device in SPCR table.
*/
status = acpi_get_table(ACPI_SIG_STAO, 0,
(struct acpi_table_header **)&stao_ptr);
if (ACPI_SUCCESS(status)) {
if (stao_ptr->header.length > sizeof(struct acpi_table_stao))
printk(KERN_INFO PREFIX "STAO Name List not yet supported.");
if (stao_ptr->ignore_uart)
acpi_get_spcr_uart_addr();
}
mutex_lock(&acpi_scan_lock);
/*
* Enumerate devices in the ACPI namespace.