From 1c1d43bf015df2768bf832ea76752dd95286fc8f Mon Sep 17 00:00:00 2001 From: Igor Mammedov Date: Mon, 9 Dec 2019 14:08:58 +0100 Subject: [PATCH] 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 Reviewed-by: Laszlo Ersek Message-Id: <1575896942-331151-6-git-send-email-imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- docs/specs/acpi_cpu_hotplug.txt | 11 +++++------ 1 file 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