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acpi: cpuhp: spec: clarify store into 'Command data' when 'Command field' == 0

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Write section of 'Command data' register should describe what happens
when it's written into. Correct description in case the last stored
'Command field' value is equal to 0, to reflect that currently it's not
supported.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <1575896942-331151-7-git-send-email-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2019-12-09 14:08:59 +01:00 committed by Michael S. Tsirkin
parent 1c1d43bf01
commit 5b8e5363fa
1 changed files with 1 additions and 2 deletions
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3
docs/specs/acpi_cpu_hotplug.txt
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@ -90,8 +90,7 @@ write access:
other values: reserved
[0x6-0x7] reserved
[0x8] Command data: (DWORD access)
current 'Command field' value:
0: OSPM reads value of CPU selector
if last stored 'Command field' value:
1: stores value into OST event register
2: stores value into OST status register, triggers
ACPI_DEVICE_OST QMP event from QEMU to external applications