Merge tag 'hw-misc-20260223' of https://github.com/philmd/qemu into staging

Misc HW & Net patches

- Fix trace event name in m68k system controller
- Constify and rename virtio_is_big_endian()
- Fix heap buffer overflow in virtio-serial-bus
- Set graphic display dimensions generically (removing system/globals-target.c)
- Mark eth_header, udp_header, tcp_header as packed structures
- Minor doc / header cleanups

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* tag 'hw-misc-20260223' of https://github.com/philmd/qemu: (21 commits)
  net: mark struct tcp_header as QEMU_PACKED
  net: mark struct udp_header as QEMU_PACKED
  net: mark struct eth_header as QEMU_PACKED
  hw/net/rocker: Don't assume h_proto is aligned in eth_strip_vlan_ex()
  hw/net/rocker: Don't keep pointer to h_proto as uint16_t* in OfDpaFlowPktFields
  hw/net/rtl8139: Remove ineffective parameter
  hw/core/cpu: expand cpu_reset function docs
  hw/alpha: remove unused includes
  hw/ppc/spapr: extract SPAPR_MAX_RAM_SLOTS in a new header
  system/globals: Build as common code
  hw/ppc: Set graphic display dimensions generically
  hw/sparc: Set graphic display dimensions generically
  hw/m68k: Set graphic display dimensions generically
  hw/m68k/q800: Set MACFB_DISPLAY_APPLE_21_COLOR within MacFrameBuffer
  hw/m68k/q800: Use MacFbMode fields in q800_machine_init()
  hw/display/macfb: Constify macfb_mode_table[] array
  hw/display/macfb: Constify macfb_sense_table[] array
  hw/char/virtio-serial-bus: Fix Heap-buffer-overflow in set_config()
  hw/virtio: rename virtio_is_big_endian to virtio_vdev_is_big_endian
  hw/virtio: Constify virtio_is_big_endian() argument
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

net/eth.c

@@ -274,7 +274,7 @@ eth_strip_vlan_ex(const struct iovec *iov, int iovcnt, size_t iovoff, int index,
                   uint16_t *payload_offset, uint16_t *tci)
 {
     struct vlan_header vlan_hdr;
-    uint16_t *new_ehdr_proto;
+    void *new_ehdr_proto;
     size_t new_ehdr_size;
     size_t copied;
 
@@ -298,7 +298,7 @@ eth_strip_vlan_ex(const struct iovec *iov, int iovcnt, size_t iovoff, int index,
         return 0;
     }
 
-    if (copied < new_ehdr_size || be16_to_cpu(*new_ehdr_proto) != vet) {
+    if (copied < new_ehdr_size || lduw_be_p(new_ehdr_proto) != vet) {
         return 0;
     }
 
@@ -308,7 +308,7 @@ eth_strip_vlan_ex(const struct iovec *iov, int iovcnt, size_t iovoff, int index,
         return 0;
     }
 
-    *new_ehdr_proto = vlan_hdr.h_proto;
+    stw_he_p(new_ehdr_proto, vlan_hdr.h_proto);
     *payload_offset = iovoff + new_ehdr_size + sizeof(vlan_hdr);
     *tci = be16_to_cpu(vlan_hdr.h_tci);