x86, acpi, tboot: Have a ACPI os prepare sleep instead of calling tboot_sleep.
The ACPI suspend path makes a call to tboot_sleep right before
it writes the PM1A, PM1B values. We replace the direct call to
tboot via an registration callback similar to __acpi_register_gsi.
CC: Len Brown <len.brown@intel.com>
Acked-by: Joseph Cihula <joseph.cihula@intel.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
[v1: Added __attribute__ ((unused))]
[v2: Introduced a wrapper instead of changing tboot_sleep return values]
[v3: Added return value AE_CTRL_SKIP for acpi_os_sleep_prepare]
Signed-off-by: Tang Liang <liang.tang@oracle.com>
[v1: Fix compile issues on IA64 and PPC64]
[v2: Fix where __acpi_os_prepare_sleep==NULL and did not go in sleep properly]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index f31c5c5..f3aae4b 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -76,6 +76,9 @@
extern char line_buf[80];
#endif /*ENABLE_DEBUGGER */
+static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
+ u32 pm1b_ctrl);
+
static acpi_osd_handler acpi_irq_handler;
static void *acpi_irq_context;
static struct workqueue_struct *kacpid_wq;
@@ -1659,3 +1662,24 @@
return AE_OK;
}
+
+acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
+ u32 pm1b_control)
+{
+ int rc = 0;
+ if (__acpi_os_prepare_sleep)
+ rc = __acpi_os_prepare_sleep(sleep_state,
+ pm1a_control, pm1b_control);
+ if (rc < 0)
+ return AE_ERROR;
+ else if (rc > 0)
+ return AE_CTRL_SKIP;
+
+ return AE_OK;
+}
+
+void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
+ u32 pm1a_ctrl, u32 pm1b_ctrl))
+{
+ __acpi_os_prepare_sleep = func;
+}