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

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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 3-7: reserved and should be ignored by OSPM
[0x5-0x7] reserved [0x5-0x7] reserved
[0x8] Command data: (DWORD access) [0x8] Command data: (DWORD access)
in case of error or unsupported command reads is 0xFFFFFFFF contains 0 unless value last stored in 'Command field' is one of:
current 'Command field' value: 0: contains 'CPU selector' value of a CPU with pending event[s]
0: returns PXM value corresponding to device
write access: write access:
offset: offset:
@ -81,9 +80,9 @@ write access:
value: value:
0: selects a CPU device with inserting/removing events and 0: selects a CPU device with inserting/removing events and
following reads from 'Command data' register return following reads from 'Command data' register return
selected CPU (CPU selector value). If no CPU with events selected CPU ('CPU selector' value).
found, the current CPU selector doesn't change and If no CPU with events found, the current 'CPU selector' doesn't
corresponding insert/remove event flags are not set. change and corresponding insert/remove event flags are not modified.
1: following writes to 'Command data' register set OST event 1: following writes to 'Command data' register set OST event
register in QEMU register in QEMU
2: following writes to 'Command data' register set OST status 2: following writes to 'Command data' register set OST status