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authorIgor Mammedov <imammedo@redhat.com>2019-12-09 14:08:58 +0100
committerMichael S. Tsirkin <mst@redhat.com>2020-01-22 00:23:07 -0500
commit1c1d43bf015df2768bf832ea76752dd95286fc8f (patch)
treefd8884d5a3f60556d93c55d1ce22abf3d685ea0d
parent1d7a52835dc6bf5d641a0d29ad35c881b8d0ba5a (diff)
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>
-rw-r--r--docs/specs/acpi_cpu_hotplug.txt11
1 files changed, 5 insertions, 6 deletions
diff --git a/docs/specs/acpi_cpu_hotplug.txt b/docs/specs/acpi_cpu_hotplug.txt
index 4e65286ff5..d5108720bf 100644
--- a/docs/specs/acpi_cpu_hotplug.txt
+++ b/docs/specs/acpi_cpu_hotplug.txt
@@ -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