[Qemu-devel] [PATCH v5 5/5] PC-1.6: add compatibility for hpet intcap on pc-q35-1.6

[Liu Ping Fan <qemulist@gmail.com>]

For guest bug compat, we limit hpet's interrupt compatibility on
ioapic's IRQ2 for pc-q35-1.6. As to pc-35-1.7 and newer, IRQ2, IRQ8,
and IRQ16~23 are allowed.

Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
---
 hw/timer/hpet.c      | 7 ++-----
 include/hw/i386/pc.h | 4 ++++
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/hw/timer/hpet.c b/hw/timer/hpet.c
index 46903b9..7af495a 100644
--- a/hw/timer/hpet.c
+++ b/hw/timer/hpet.c
@@ -43,11 +43,8 @@
 
 #define HPET_MSI_SUPPORT        0
 
-/* For bug compat, using only IRQ2. Soon it will be fixed as
- * 0xff0104ULL, i.e using IRQ16~23, IRQ8 and IRQ2 after
- * introducing pc-1.6 compat.
- */
-#define HPET_TN_INT_CAP_DEFAULT 0x4ULL
+/* using IRQ16~23, IRQ8 and IRQ2 */
+#define HPET_TN_INT_CAP_DEFAULT 0xff0104ULL
 
 #define TYPE_HPET "hpet"
 #define HPET(obj) OBJECT_CHECK(HPETState, (obj), TYPE_HPET)
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 9dd077f..79c63b3 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -231,6 +231,10 @@ int e820_add_entry(uint64_t, uint64_t, uint32_t);
             .driver   = "e1000",\
             .property = "mitigation",\
             .value    = "off",\
+        },{\
+            .driver   = "hpet",\
+            .property = "intcap",\
+            .value    = stringify(4),\
         }
 
 #define PC_COMPAT_1_5 \
-- 
1.8.1.4