File 0116-cpu-introduce-CPUClass-virtio_is_bi.patch of Package qemu.6354

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File 0116-cpu-introduce-CPUClass-virtio_is_bi.patch of Package qemu.6354

From 94b6e2198a0cc47205042aba7885134f913dec85 Mon Sep 17 00:00:00 2001
From: Greg Kurz <gkurz@linux.vnet.ibm.com>
Date: Tue, 24 Jun 2014 19:33:21 +0200
Subject: [PATCH] cpu: introduce CPUClass::virtio_is_big_endian()

If we want to support targets that can change endianness (modern PPC and
ARM for the moment), we need to add a per-CPU class method to be called
from the virtio code. The virtio_ prefix in the name is a hint for people
to avoid misusage (aka. anywhere but from the virtio code).

The default behaviour is to return the compile-time default target
endianness.

Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit bf7663c4bd8f8f619d6dbb5780025d92ace250a8)
Signed-off-by: Alexander Graf <agraf@suse.de>

Conflicts:
	include/qom/cpu.h
---
 include/qom/cpu.h | 1 +
 qom/cpu.c         | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index df977c88f0..444e263c04 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -112,6 +112,7 @@ typedef struct CPUClass {
     bool (*has_work)(CPUState *cpu);
     void (*do_interrupt)(CPUState *cpu);
     CPUUnassignedAccess do_unassigned_access;
+    bool (*virtio_is_big_endian)(CPUState *cpu);
     int (*memory_rw_debug)(CPUState *cpu, vaddr addr,
                            uint8_t *buf, int len, bool is_write);
     void (*dump_state)(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
diff --git a/qom/cpu.c b/qom/cpu.c
index fada2d4b92..b32dd0a562 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -196,6 +196,11 @@ static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg)
     return 0;
 }
 
+bool target_words_bigendian(void);
+static bool cpu_common_virtio_is_big_endian(CPUState *cpu)
+{
+    return target_words_bigendian();
+}
 
 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
                     int flags)
@@ -334,6 +339,7 @@ static void cpu_class_init(ObjectClass *klass, void *data)
     k->write_elf64_note = cpu_common_write_elf64_note;
     k->gdb_read_register = cpu_common_gdb_read_register;
     k->gdb_write_register = cpu_common_gdb_write_register;
+    k->virtio_is_big_endian = cpu_common_virtio_is_big_endian;
     dc->realize = cpu_common_realizefn;
     /*
      * Reason: CPUs still need special care by board code: wiring up

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File 0116-cpu-introduce-CPUClass-virtio_is_bi.patch of Package qemu.6354

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