[RFC PATCH 1/4] acpi: fix acpi_send_gpe_event() to handle more events

["Chalios, Babis" <bchalios@amazon.es>]

acpi_send_gpe_events() sends events encoded in the AcpiEventStatusBits
enum. The maximum bit used so far in the latter was 128, hence a single
byte (ACPIGPE.sts[0]) is currently enough to hold the set bits.

When we add an extra one, we will need a second byte to encode the state
and casting from AcpiEventStatusBits to uint8_t will silently ignore the
higher bits.

Fix this, by taking into account the length value inside ACPIGPE.

Signed-off-by: Babis Chalios <bchalios@amazon.es>
---
 hw/acpi/core.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/hw/acpi/core.c b/hw/acpi/core.c
index ff16582803..48694eca54 100644
--- a/hw/acpi/core.c
+++ b/hw/acpi/core.c
@@ -730,7 +730,13 @@ uint32_t acpi_gpe_ioport_readb(ACPIREGS *ar, uint32_t addr)
 void acpi_send_gpe_event(ACPIREGS *ar, qemu_irq irq,
                          AcpiEventStatusBits status)
 {
-    ar->gpe.sts[0] |= status;
+    int i;
+
+    for (i = 0; i < ar->gpe.len; i++) {
+        ar->gpe.sts[i] |= (status & 0xff);
+        status >>= 8;
+    }
+
     acpi_update_sci(ar, irq);
 }
 
-- 
2.34.1