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[Qemu-devel] [PATCH v8 10/20] cpu: introduce CPUClass::virtio_is_big_end
From: |
Greg Kurz |
Subject: |
[Qemu-devel] [PATCH v8 10/20] cpu: introduce CPUClass::virtio_is_big_endian() |
Date: |
Fri, 13 Jun 2014 13:22:19 +0200 |
User-agent: |
StGit/0.17-dirty |
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 <address@hidden>
Signed-off-by: Greg Kurz <address@hidden>
---
include/qom/cpu.h | 10 ++++++++++
qom/cpu.c | 6 ++++++
2 files changed, 16 insertions(+)
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 4b352a2..30e8fe3 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -116,6 +116,7 @@ typedef struct CPUClass {
CPUUnassignedAccess do_unassigned_access;
void (*do_unaligned_access)(CPUState *cpu, vaddr addr,
int is_write, int is_user, uintptr_t retaddr);
+ 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,
@@ -548,6 +549,15 @@ void cpu_interrupt(CPUState *cpu, int mask);
#endif /* USER_ONLY */
+#ifndef CONFIG_USER_ONLY
+static inline bool cpu_virtio_is_big_endian(CPUState *cpu)
+{
+ CPUClass *cc = CPU_GET_CLASS(cpu);
+
+ return cc->virtio_is_big_endian(cpu);
+}
+#endif
+
#ifdef CONFIG_SOFTMMU
static inline void cpu_unassigned_access(CPUState *cpu, hwaddr addr,
bool is_write, bool is_exec,
diff --git a/qom/cpu.c b/qom/cpu.c
index fada2d4..d9bf151 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -25,6 +25,7 @@
#include "qemu/log.h"
#include "qemu/error-report.h"
#include "sysemu/sysemu.h"
+#include "exec/cpu-common.h"
bool cpu_exists(int64_t id)
{
@@ -196,6 +197,10 @@ static int cpu_common_gdb_write_register(CPUState *cpu,
uint8_t *buf, int reg)
return 0;
}
+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
- [Qemu-devel] [PATCH v8 02/20] virtio: introduce device specific migration calls, (continued)
- [Qemu-devel] [PATCH v8 02/20] virtio: introduce device specific migration calls, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 03/20] virtio-net: implement per-device migration calls, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 04/20] virtio-blk: implement per-device migration calls, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 05/20] virtio-serial: implement per-device migration calls, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 06/20] virtio-balloon: implement per-device migration calls, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 07/20] virtio-rng: implement per-device migration calls, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 08/20] virtio: add subsections to the migration stream, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 09/20] exec: introduce target_words_bigendian() helper, Greg Kurz, 2014/06/13
- [Qemu-devel] [PATCH v8 10/20] cpu: introduce CPUClass::virtio_is_big_endian(),
Greg Kurz <=
- [Qemu-devel] [PATCH v8 11/20] virtio: add endian-ambivalent support to VirtIODevice, Greg Kurz, 2014/06/13
[Qemu-devel] [PATCH v8 12/20] virtio: memory accessors for endian-ambivalent targets, Greg Kurz, 2014/06/13
[Qemu-devel] [PATCH v8 13/20] virtio: allow byte swapping for vring, Greg Kurz, 2014/06/13
[Qemu-devel] [PATCH v8 14/20] virtio-net: use virtio wrappers to access headers, Greg Kurz, 2014/06/13