[RFC,13/17] hw/pci-host: Declare device little or big endian
diff mbox series

Message ID 3d3b45379acb99a1b84237333421481a854807cb.1566467963.git.tony.nguyen@bt.com
State New
Headers show
Series
  • Declare device little or big endian
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Commit Message

Tony Nguyen Aug. 23, 2019, 6:56 p.m. UTC
For each device declared with DEVICE_NATIVE_ENDIAN, find the set of
targets from the set of target/hw/*/device.o.

If the set of targets are all little or all big endian, re-declare
the device endianness as DEVICE_LITTLE_ENDIAN or DEVICE_BIG_ENDIAN
respectively.

This *naive* deduction may result in genuinely native endian devices
being incorrectly declared as little or big endian, but should not
introduce regressions for current targets.

These devices should be re-declared as DEVICE_NATIVE_ENDIAN if 1) it
has a new target with an opposite endian or 2) someone informed knows
better =)

Signed-off-by: Tony Nguyen <tony.nguyen@bt.com>
---
 hw/pci-host/q35.c       | 2 +-
 hw/pci-host/versatile.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

Patch
diff mbox series

diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index 158d270b9f..485e2a02af 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -289,7 +289,7 @@  static void tseg_blackhole_write(void *opaque, hwaddr addr, uint64_t val,
 static const MemoryRegionOps tseg_blackhole_ops = {
     .read = tseg_blackhole_read,
     .write = tseg_blackhole_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
+    .endianness = DEVICE_LITTLE_ENDIAN,
     .valid.min_access_size = 1,
     .valid.max_access_size = 4,
     .impl.min_access_size = 4,
diff --git a/hw/pci-host/versatile.c b/hw/pci-host/versatile.c
index b731d0544f..df7212237d 100644
--- a/hw/pci-host/versatile.c
+++ b/hw/pci-host/versatile.c
@@ -243,7 +243,7 @@  static uint64_t pci_vpb_reg_read(void *opaque, hwaddr addr,
 static const MemoryRegionOps pci_vpb_reg_ops = {
     .read = pci_vpb_reg_read,
     .write = pci_vpb_reg_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
+    .endianness = DEVICE_LITTLE_ENDIAN,
     .valid = {
         .min_access_size = 4,
         .max_access_size = 4,
@@ -309,7 +309,7 @@  static uint64_t pci_vpb_config_read(void *opaque, hwaddr addr,
 static const MemoryRegionOps pci_vpb_config_ops = {
     .read = pci_vpb_config_read,
     .write = pci_vpb_config_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
+    .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
 static int pci_vpb_map_irq(PCIDevice *d, int irq_num)