[PATCH 2/4] pvpanic: add pvpanic support for arm64

[Peng Hao]

pvpanic device is a qemu-specific emulation device. Pvpanic
devices are now available for ARM64. This patch supports the APCI
way to get device information.

Signed-off-by: Peng Hao <peng.h...@zte.com.cn>
---
 drivers/misc/pvpanic.c | 22 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c
index fd86dab..bdcff8b 100644
--- a/drivers/misc/pvpanic.c
+++ b/drivers/misc/pvpanic.c
@@ -35,13 +35,16 @@
 
 static const struct acpi_device_id pvpanic_device_ids[] = {
        { "QEMU0001", 0 },
+       { "PVPANIC01", 0 },
        { "", 0 },
 };
 MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids);
 
 #define PVPANIC_PANICKED       (1 << 0)
 
+
+static void __iomem *base;
 
 static struct acpi_driver pvpanic_driver = {
        .name =         "pvpanic",
@@ -57,7 +60,10 @@
 static void
 pvpanic_send_event(unsigned int event)
 {
-       outb(event, port);
+       if (port)
+               outb(event, port);
+       else if (base)
+               writeb(event, base);
 }
 
 static int
@@ -77,6 +83,8 @@
 static acpi_status
 pvpanic_walk_resources(struct acpi_resource *res, void *context)
 {
+       struct acpi_resource_fixed_memory32 *fixmem32;
+
        switch (res->type) {
        case ACPI_RESOURCE_TYPE_END_TAG:
                return AE_OK;
@@ -84,7 +92,11 @@
        case ACPI_RESOURCE_TYPE_IO:
                port = res->data.io.minimum;
                return AE_OK;
-
+
+       case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+               fixmem32 = &res->data.fixed_memory32;
+               base = ioremap(fixmem32->address, fixmem32->address_length);
+               return AE_OK;
        default:
                return AE_ERROR;
        }
@@ -104,7 +116,7 @@ static int pvpanic_add(struct acpi_device *device)
        acpi_walk_resources(device->handle, METHOD_NAME__CRS,
                            pvpanic_walk_resources, NULL);
 
-       if (!port)
+       if (!port && !base)
                return -ENODEV;
 
        atomic_notifier_chain_register(&panic_notifier_list,
@@ -118,6 +130,8 @@ static int pvpanic_remove(struct acpi_device *device)
 
        atomic_notifier_chain_unregister(&panic_notifier_list,
                                         &pvpanic_panic_nb);
+       if (base)
+               iounmap(base);
        return 0;
 }
 
-- 
1.8.3.1