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physmem: Add helper function to destroy CPU AddressSpace
Virtual CPU Hot-unplug leads to unrealization of a CPU object. This also involves destruction of the CPU AddressSpace. Add common function to help destroy the CPU AddressSpace. Signed-off-by: Salil Mehta <salil.mehta@huawei.com> Tested-by: Vishnu Pajjuri <vishnu@os.amperecomputing.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Tested-by: Xianglai Li <lixianglai@loongson.cn> Tested-by: Miguel Luis <miguel.luis@oracle.com> Reviewed-by: Shaoqin Huang <shahuang@redhat.com> Tested-by: Zhao Liu <zhao1.liu@intel.com> Acked-by: Igor Mammedov <imammedo@redhat.com> Message-Id: <20240716111502.202344-7-salil.mehta@huawei.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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@ -129,6 +129,14 @@ size_t qemu_ram_pagesize_largest(void);
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*/
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void cpu_address_space_init(CPUState *cpu, int asidx,
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const char *prefix, MemoryRegion *mr);
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/**
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* cpu_address_space_destroy:
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* @cpu: CPU for which address space needs to be destroyed
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* @asidx: integer index of this address space
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*
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* Note that with KVM only one address space is supported.
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*/
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void cpu_address_space_destroy(CPUState *cpu, int asidx);
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void cpu_physical_memory_rw(hwaddr addr, void *buf,
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hwaddr len, bool is_write);
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@ -496,6 +496,7 @@ struct CPUState {
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QSIMPLEQ_HEAD(, qemu_work_item) work_list;
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struct CPUAddressSpace *cpu_ases;
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int cpu_ases_count;
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int num_ases;
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AddressSpace *as;
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MemoryRegion *memory;
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@ -763,6 +763,7 @@ void cpu_address_space_init(CPUState *cpu, int asidx,
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if (!cpu->cpu_ases) {
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cpu->cpu_ases = g_new0(CPUAddressSpace, cpu->num_ases);
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cpu->cpu_ases_count = cpu->num_ases;
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}
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newas = &cpu->cpu_ases[asidx];
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@ -776,6 +777,34 @@ void cpu_address_space_init(CPUState *cpu, int asidx,
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}
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}
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void cpu_address_space_destroy(CPUState *cpu, int asidx)
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{
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CPUAddressSpace *cpuas;
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assert(cpu->cpu_ases);
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assert(asidx >= 0 && asidx < cpu->num_ases);
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/* KVM cannot currently support multiple address spaces. */
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assert(asidx == 0 || !kvm_enabled());
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cpuas = &cpu->cpu_ases[asidx];
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if (tcg_enabled()) {
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memory_listener_unregister(&cpuas->tcg_as_listener);
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}
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address_space_destroy(cpuas->as);
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g_free_rcu(cpuas->as, rcu);
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if (asidx == 0) {
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/* reset the convenience alias for address space 0 */
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cpu->as = NULL;
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}
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if (--cpu->cpu_ases_count == 0) {
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g_free(cpu->cpu_ases);
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cpu->cpu_ases = NULL;
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}
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}
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AddressSpace *cpu_get_address_space(CPUState *cpu, int asidx)
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{
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/* Return the AddressSpace corresponding to the specified index */
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