From: Al Stone <al.stone@xxxxxxxxxx>
In HW reduced mode, the use of the SCI interrupt is not allowed. In
all those places that use the FADT sci_interrupt field, make sure we
do not execute that path when in HW reduced mode.
In the case of acpi_os_install_interrupt_handler() in osl.c, this allows
us to open up the routine to installing interrupt handlers other than
acpi_gbl_FADT.sci_interrupt regardless of whether we are in ACPI legacy
mode or reduced HW mode; acpi_os_remove_interrupt_handler() changes to
maintain symmetry.
Signed-off-by: Al Stone <al.stone@xxxxxxxxxx>
---
drivers/acpi/bus.c | 30 ++++++++++++++++--------------
drivers/acpi/osl.c | 18 +++++++-----------
drivers/acpi/pci_link.c | 2 ++
3 files changed, 25 insertions(+), 25 deletions(-)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 0710004..d871859 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -552,21 +552,23 @@ void __init acpi_early_init(void)
}
#ifdef CONFIG_X86
- if (!acpi_ioapic) {
- /* compatible (0) means level (3) */
- if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
- acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
- acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
+ if (!acpi_gbl_reduced_hardware) {
+ if (!acpi_ioapic) {
+ /* compatible (0) means level (3) */
+ if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
+ acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
+ acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
+ }
+ /* Set PIC-mode SCI trigger type */
+ acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
+ (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
+ } else {
+ /*
+ * now that acpi_gbl_FADT is initialized,
+ * update it with result from INT_SRC_OVR parsing
+ */
+ acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
}
- /* Set PIC-mode SCI trigger type */
- acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
- (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
- } else {
- /*
- * now that acpi_gbl_FADT is initialized,
- * update it with result from INT_SRC_OVR parsing
- */
- acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
}
#endif
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 44c07eb..c946a3a 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -84,6 +84,7 @@ static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
static acpi_osd_handler acpi_irq_handler;
static void *acpi_irq_context;
+static u32 acpi_irq_number;
static struct workqueue_struct *kacpid_wq;
static struct workqueue_struct *kacpi_notify_wq;
static struct workqueue_struct *kacpi_hotplug_wq;
@@ -178,6 +179,10 @@ static void __init acpi_request_region (struct acpi_generic_address *gas,
static int __init acpi_reserve_resources(void)
{
+ /* Handle hardware reduced mode: i.e., do nothing. */
+ if (acpi_gbl_reduced_hardware)
+ return 0;
+
acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
"ACPI PM1a_EVT_BLK");
@@ -795,13 +800,6 @@ acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
acpi_irq_stats_init();
- /*
- * ACPI interrupts different from the SCI in our copy of the FADT are
- * not supported.
- */
- if (gsi != acpi_gbl_FADT.sci_interrupt)
- return AE_BAD_PARAMETER;
-
if (acpi_irq_handler)
return AE_ALREADY_ACQUIRED;
@@ -818,15 +816,13 @@ acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
acpi_irq_handler = NULL;
return AE_NOT_ACQUIRED;
}
+ acpi_irq_number = irq;
return AE_OK;
}
acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
{
- if (irq != acpi_gbl_FADT.sci_interrupt)
- return AE_BAD_PARAMETER;
-
free_irq(irq, acpi_irq);
acpi_irq_handler = NULL;
@@ -1806,7 +1802,7 @@ acpi_status __init acpi_os_initialize1(void)
acpi_status acpi_os_terminate(void)
{
if (acpi_irq_handler) {
- acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
+ acpi_os_remove_interrupt_handler(acpi_irq_number,
acpi_irq_handler);
}
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index 2652a61..d5c155e 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -505,6 +505,8 @@ int __init acpi_irq_penalty_init(void)
}
}
/* Add a penalty for the SCI */
+ if (acpi_gbl_reduced_hardware)
+ return 0;
acpi_irq_penalty[acpi_gbl_FADT.sci_interrupt] += PIRQ_PENALTY_PCI_USING;
return 0;
}
--
1.8.4.2
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