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acpi: extend acpi event listener about power button events

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Upon receiving acpi event related to ACPI button notification emulate
PM/PWRBTN_STS and trigger SCI.

BUG=None
TEST=After enabling CONFIG_ACPI_BUTTON on hypervisor kernel, check if
power button events are propagated to the guest by reading
/sys/firmware/acpi/interrupts/ff_pwr_btn counter.

Change-Id: Ie52c58d0934fb6657940bdca35dfbc68a8f4f42c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3521728
Reviewed-by: Dmitry Torokhov <dtor@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Tomasz Nowicki <tnowicki@google.com>
This commit is contained in:
Grzegorz Jaszczyk 2022-03-14 16:05:01 +00:00 committed by Commit Bot
parent ab50403924
commit 2fc3036ba8
1 changed files with 25 additions and 1 deletions
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26
devices/src/acpi.rs
View file

@ -221,7 +221,13 @@ fn run_worker(
for event in events.iter().filter(|e| e.is_readable) {
match event.token {
Token::AcpiEvent => {
acpi_event_run(&acpi_event_sock, &gpe0, &sci_evt, &acpi_event_ignored_gpe);
acpi_event_run(
&acpi_event_sock,
&gpe0,
&pm1,
&sci_evt,
&acpi_event_ignored_gpe,
);
}
Token::InterruptResample => {
let _ = sci_resample.read();
@ -275,6 +281,22 @@ fn acpi_event_gpe_class(
}
}
const ACPI_BUTTON_NOTIFY_STATUS: u32 = 0x80;
fn acpi_event_pwrbtn_class(
acpi_event: AcpiNotifyEvent,
pm1: &Arc<Mutex<Pm1Resource>>,
sci_evt: &Event,
) {
// If received power button event, emulate PM/PWRBTN_STS and trigger SCI
if acpi_event._type == ACPI_BUTTON_NOTIFY_STATUS && acpi_event.bus_id.contains("LNXPWRBN") {
let mut pm1 = pm1.lock();
pm1.status |= BITMASK_PM1STS_PWRBTN_STS;
pm1.trigger_sci(sci_evt);
}
}
fn get_acpi_event_group() -> Option<u32> {
// Create netlink generic socket which will be used to query about given family name
let netlink_ctrl_sock = NetlinkGenericSocket::new(0).unwrap();
@ -288,6 +310,7 @@ fn get_acpi_event_group() -> Option<u32> {
fn acpi_event_run(
acpi_event_sock: &NetlinkGenericSocket,
gpe0: &Arc<Mutex<GpeResource>>,
pm1: &Arc<Mutex<Pm1Resource>>,
sci_evt: &Event,
ignored_gpe: &[u32],
) {
@ -317,6 +340,7 @@ fn acpi_event_run(
ignored_gpe,
);
}
"button/power" => acpi_event_pwrbtn_class(acpi_event, pm1, sci_evt),
c => warn!("unknown acpi event {}", c),
};
}