Allow multiple calls to cpu_address_space_init(); each
call adds an entry to the cpu->ases array at the specified
index. It is up to the target-specific CPU code to actually use
these extra address spaces.
Since this multiple AddressSpace support won't work with
KVM, add an assertion to avoid confusing failures.
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
---
exec.c | 28 ++++++++++++++++++----------
include/qom/cpu.h | 2 ++
2 files changed, 20 insertions(+), 10 deletions(-)
diff --git a/exec.c b/exec.c
index b5490c8..6a2a694 100644
--- a/exec.c
+++ b/exec.c
@@ -552,25 +552,32 @@ CPUState *qemu_get_cpu(int index)
#if !defined(CONFIG_USER_ONLY)
void cpu_address_space_init(CPUState *cpu, AddressSpace *as, int asidx)
{
+ CPUAddressSpace *newas;
+
if (asidx == 0) {
/* address space 0 gets the convenience alias */
cpu->as = as;
}
- /* We only support one address space per cpu at the moment. */
- assert(cpu->as == as);
+ /* KVM cannot currently support multiple address spaces. */
+ assert(asidx == 0 || !kvm_enabled());
- if (cpu->cpu_ases) {
- /* We've already registered the listener for our only AS */
- return;
+ if (asidx >= cpu->num_ases) {
+ if (cpu->num_ases == 0) {
+ cpu->cpu_ases = g_new(CPUAddressSpace, asidx + 1);
+ } else {
+ cpu->cpu_ases = g_renew(CPUAddressSpace, cpu->cpu_ases, asidx + 1);
+ }
+ cpu->num_ases = asidx + 1;
}
- cpu->cpu_ases = g_new0(CPUAddressSpace, 1);
- cpu->cpu_ases[0].cpu = cpu;
- cpu->cpu_ases[0].as = as;
+ newas = &cpu->cpu_ases[asidx];
+ memset(newas, 0, sizeof(*newas));
+ newas->cpu = cpu;
+ newas->as = as;
if (tcg_enabled()) {
- cpu->cpu_ases[0].tcg_as_listener.commit = tcg_commit;
- memory_listener_register(&cpu->cpu_ases[0].tcg_as_listener, as);
+ newas->tcg_as_listener.commit = tcg_commit;
+ memory_listener_register(&newas->tcg_as_listener, as);
}
}
#endif
@@ -627,6 +634,7 @@ void cpu_exec_init(CPUState *cpu, Error **errp)
Error *local_err = NULL;
cpu->as = NULL;
+ cpu->num_ases = 0;
#ifndef CONFIG_USER_ONLY
cpu->thread_id = qemu_get_thread_id();
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 51a1323..ae17932 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -236,6 +236,7 @@ struct kvm_run;
* so that interrupts take effect immediately.
* @cpu_ases: Pointer to array of CPUAddressSpaces (which define the
* AddressSpaces this CPU has)
+ * @num_ases: number of CPUAddressSpaces in @cpu_ases
* @as: Pointer to the first AddressSpace, for the convenience of targets which
* only have a single AddressSpace
* @env_ptr: Pointer to subclass-specific CPUArchState field.
@@ -285,6 +286,7 @@ struct CPUState {
struct qemu_work_item *queued_work_first, *queued_work_last;
CPUAddressSpace *cpu_ases;
+ int num_ases;
AddressSpace *as;
void *env_ptr; /* CPUArchState */
--
1.9.1
