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acpi: cpuhp: spec: fix 'Command data' description 

Correct returned value description in case 'Command field' == 0x0,
it's not PXM but CPU selector value with pending event

In addition describe 0 blanket value in case of not supported
'Command field' value.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <1575896942-331151-6-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 14:08:58 +01:00 committed by Michael S. Tsirkin
parent 1d7a52835d
commit 1c1d43bf01
1 changed files with 5 additions and 6 deletions
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11
docs/specs/acpi_cpu_hotplug.txt
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@ -56,9 +56,8 @@ read access:
3-7: reserved and should be ignored by OSPM
[0x5-0x7] reserved
[0x8] Command data: (DWORD access)
in case of error or unsupported command reads is 0xFFFFFFFF
current 'Command field' value:
0: returns PXM value corresponding to device
contains 0 unless value last stored in 'Command field' is one of:
0: contains 'CPU selector' value of a CPU with pending event[s]
write access:
offset:
@ -81,9 +80,9 @@ write access:
value:
0: selects a CPU device with inserting/removing events and
following reads from 'Command data' register return
selected CPU (CPU selector value). If no CPU with events
found, the current CPU selector doesn't change and
corresponding insert/remove event flags are not set.
selected CPU ('CPU selector' value).
If no CPU with events found, the current 'CPU selector' doesn't
change and corresponding insert/remove event flags are not modified.
1: following writes to 'Command data' register set OST event
register in QEMU
2: following writes to 'Command data' register set OST status