linux-toradex.git/include/xen/acpi.h, branch v6.1 Linux kernel for Apalis and Colibri modules xen: Remove support for PV ACPI cpu/memory hotplug 2021-04-23T07:31:50+00:00 Boris Ostrovsky boris.ostrovsky@oracle.com 2021-04-13T17:52:24+00:00 01325044dbe47a7dc66b786445727a6de304f328 Commit 76fc253723ad ("xen/acpi-stub: Disable it b/c the acpi_processor_add is no longer called.") declared as BROKEN support for Xen ACPI stub (which is required for xen-acpi-{cpu|memory}-hotplug) and suggested that this is temporary and will be soon fixed. This was in March 2013. Further, commit cfafae940381 ("xen: rename dom0_op to platform_op") renamed an interface used by memory hotplug code without updating that code (as it was BROKEN and therefore not compiled). This was in November 2015 and has gone unnoticed for over 5 year. It is now clear that this code is of no interest to anyone and therefore should be removed. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: https://lore.kernel.org/r/1618336344-3162-1-git-send-email-boris.ostrovsky@oracle.com Signed-off-by: Juergen Gross <jgross@suse.com> 
Commit 76fc253723ad ("xen/acpi-stub: Disable it b/c the acpi_processor_add
is no longer called.") declared as BROKEN support for Xen ACPI stub (which
is required for xen-acpi-{cpu|memory}-hotplug) and suggested that this
is temporary and will be soon fixed. This was in March 2013.

Further, commit cfafae940381 ("xen: rename dom0_op to platform_op")
renamed an interface used by memory hotplug code without updating that
code (as it was BROKEN and therefore not compiled). This was
in November 2015 and has gone unnoticed for over 5 year.

It is now clear that this code is of no interest to anyone and therefore
should be removed.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/1618336344-3162-1-git-send-email-boris.ostrovsky@oracle.com
Signed-off-by: Juergen Gross <jgross@suse.com>
xen / ACPI: notify xen when reduced hardware sleep is available 2013-07-31T12:22:35+00:00 Ben Guthro benjamin.guthro@citrix.com 2013-07-30T12:24:54+00:00 be6b25d15f5e67bc49b90ed55feb1dd947f4df2c Use the acpi_os_prepare_extended_sleep() callback to notify xen to make use of the reduced hardware sleep functionality The xen hypervisor change underlying this is commit 62d1a69 ("ACPI: support v5 (reduced HW) sleep interface") on the master branch of git://xenbits.xen.org/xen.git. Signed-off-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Ben Guthro <benjamin.guthro@citrix.com> Acked-by: Konrad Wilk <konrad.wilk@oracle.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
Use the acpi_os_prepare_extended_sleep() callback to notify xen
to make use of the reduced hardware sleep functionality

The xen hypervisor change underlying this is commit 62d1a69
("ACPI: support v5 (reduced HW) sleep interface") on the master
branch of git://xenbits.xen.org/xen.git.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Ben Guthro <benjamin.guthro@citrix.com>
Acked-by: Konrad Wilk <konrad.wilk@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
xen / ACPI / sleep: Register an acpi_suspend_lowlevel callback. 2013-06-19T21:36:30+00:00 Konrad Rzeszutek Wilk konrad.wilk@oracle.com 2013-05-14T17:46:12+00:00 068e0dc7b7c1db9801e3d7f2ba5cb1d2a552a35b We piggyback on "x86/acpi: Provide registration for acpi_suspend_lowlevel." to register a Xen version of the callback. The callback does not do anything special - except it omits the x86_acpi_suspend_lowlevel. This is necessary b/c during suspend the generic code tries to write cr3 values that clashes with what the hypervisor has set up for the guest. Signed-off-by: Liang Tang <liang.tang@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Tested-by: Ben Guthro <benjamin.guthro@citrix.com> Acked-by: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
We piggyback on "x86/acpi: Provide registration for acpi_suspend_lowlevel."
to register a Xen version of the callback. The callback does not
do anything special - except it omits the x86_acpi_suspend_lowlevel.

This is necessary b/c during suspend the generic code tries to write
cr3 values that clashes with what the hypervisor has set up for the guest.

Signed-off-by: Liang Tang <liang.tang@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Ben Guthro <benjamin.guthro@citrix.com>
Acked-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
xen/acpi: move xen_acpi_get_pxm under CONFIG_XEN_DOM0 2013-02-20T03:02:30+00:00 Liu Jinsong jinsong.liu@intel.com 2013-02-14T07:46:26+00:00 268a207563f933ff8e3d876866c324b4247f234e To avoid compile issue and it's meanigfull only under CONFIG_XEN_DOM0. In file included from linux/arch/x86/xen/enlighten.c:47:0: linux/include/xen/acpi.h:75:76: error: unknown type name ‘acpi_handle’ make[3]: *** [arch/x86/xen/enlighten.o] Error 1 Signed-off-by: Liu Jinsong <jinsong.liu@intel.com> [v1: Fixed spelling mistakes] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 
To avoid compile issue and it's meanigfull only under CONFIG_XEN_DOM0.

In file included from linux/arch/x86/xen/enlighten.c:47:0:
	linux/include/xen/acpi.h:75:76: error: unknown type name ‘acpi_handle’
make[3]: *** [arch/x86/xen/enlighten.o] Error 1

Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
[v1: Fixed spelling mistakes]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
xen/acpi: ACPI cpu hotplug 2013-02-20T03:02:29+00:00 Liu Jinsong jinsong.liu@intel.com 2013-01-25T07:43:34+00:00 39adc483d378f79711f291539f20e3797337892d This patch implement real Xen ACPI cpu hotplug driver as module. When loaded, it replaces Xen stub driver. For booting existed cpus, the driver enumerates them. For hotadded cpus, which added at runtime and notify OS via device or container event, the driver is invoked to add them, parsing cpu information, hypercalling to Xen hypervisor to add them, and finally setting up new /sys interface for them. Signed-off-by: Liu Jinsong <jinsong.liu@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 
This patch implement real Xen ACPI cpu hotplug driver as module.
When loaded, it replaces Xen stub driver.

For booting existed cpus, the driver enumerates them.
For hotadded cpus, which added at runtime and notify OS via
device or container event, the driver is invoked to add them,
parsing cpu information, hypercalling to Xen hypervisor to add
them, and finally setting up new /sys interface for them.

Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
xen/acpi: Move xen_acpi_get_pxm to Xen's acpi.h 2013-02-20T03:02:28+00:00 Liu Jinsong jinsong.liu@intel.com 2013-01-25T07:42:31+00:00 40a58637a4fa10a2faea71f0f30ff0b3d74c6e00 So that it could be reused by Xen CPU hotplug logic. Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 
So that it could be reused by Xen CPU hotplug logic.

Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
xen/stub: driver for CPU hotplug 2013-02-20T03:02:27+00:00 Liu Jinsong jinsong.liu@intel.com 2013-01-24T14:12:30+00:00 b22ff77b82598ff131d215627533e09e4a472220 Add Xen stub driver for CPU hotplug, early occupy to block native, will be replaced later by real Xen processor driver module. Signed-off-by: Liu Jinsong <jinsong.liu@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 
Add Xen stub driver for CPU hotplug, early occupy to block native,
will be replaced later by real Xen processor driver module.

Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
xen/stub: driver for memory hotplug 2013-02-20T03:02:25+00:00 Liu Jinsong jinsong.liu@intel.com 2013-01-24T12:16:59+00:00 dcb93b96cec723783a81e8cac7df62feaf964792 This patch create a file (xen-stub.c) for Xen stub drivers. Xen stub drivers are used 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 and loaded on demand. This patch is specific for Xen memory hotplug (other Xen logic can add stub drivers on their own). The xen stub driver will occupied earlier via subsys_initcall (than native memory hotplug driver via module_init and so blocking native). Later real Xen memory hotplug logic will unregister the stub driver and register itself to take effect on demand. Signed-off-by: Liu Jinsong <jinsong.liu@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 
This patch create a file (xen-stub.c) for Xen stub drivers.
Xen stub drivers are used 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 and loaded on demand.

This patch is specific for Xen memory hotplug (other Xen logic
can add stub drivers on their own). The xen stub driver will
occupied earlier via subsys_initcall (than native memory hotplug
driver via module_init and so blocking native). Later real Xen
memory hotplug logic will unregister the stub driver and register
itself to take effect on demand.

Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
xen/acpi/sleep: Enable ACPI sleep via the __acpi_os_prepare_sleep 2012-05-07T19:33:18+00:00 Konrad Rzeszutek Wilk konrad.wilk@oracle.com 2011-12-08T09:32:23+00:00 211063dc159695bd6072c5393e9bc729481c6ede Provide the registration callback to call in the Xen's ACPI sleep functionality. This means that during S3/S5 we make a hypercall XENPF_enter_acpi_sleep with the proper PM1A/PM1B registers. Based of Ke Yu's <ke.yu@intel.com> initial idea. [ From http://xenbits.xensource.com/linux-2.6.18-xen.hg change c68699484a65 ] [v1: Added Copyright and license] [v2: Added check if PM1A/B the 16-bits MSB contain something. The spec only uses 16-bits but might have more in future] Signed-off-by: Liang Tang <liang.tang@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 
Provide the registration callback to call in the Xen's
ACPI sleep functionality. This means that during S3/S5
we make a hypercall XENPF_enter_acpi_sleep with the
proper PM1A/PM1B registers.

Based of Ke Yu's <ke.yu@intel.com> initial idea.
[ From http://xenbits.xensource.com/linux-2.6.18-xen.hg
change c68699484a65 ]

[v1: Added Copyright and license]
[v2: Added check if PM1A/B the 16-bits MSB contain something. The spec
     only uses 16-bits but might have more in future]
Signed-off-by: Liang Tang <liang.tang@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>