From: xianglai li <[email protected]> Introduce new function to destroy CPU address space resources for cpu hot-(un)plug.
Co-authored-by: "Salil Mehta" <[email protected]> Cc: "Salil Mehta" <[email protected]> Cc: Xiaojuan Yang <[email protected]> Cc: Song Gao <[email protected]> Cc: "Michael S. Tsirkin" <[email protected]> Cc: Igor Mammedov <[email protected]> Cc: Ani Sinha <[email protected]> Cc: Paolo Bonzini <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Eduardo Habkost <[email protected]> Cc: Marcel Apfelbaum <[email protected]> Cc: "Philippe Mathieu-Daudé" <[email protected]> Cc: Yanan Wang <[email protected]> Cc: "Daniel P. Berrangé" <[email protected]> Cc: Peter Xu <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: Bibo Mao <[email protected]> Signed-off-by: xianglai li <[email protected]> Message-ID: <3a4fc2a3df4b767c3c296a7da3bc15ca9c251316.1694433326.git.lixiang...@loongson.cn> --- include/exec/cpu-common.h | 8 ++++++++ include/hw/core/cpu.h | 1 + softmmu/physmem.c | 24 ++++++++++++++++++++++++ 3 files changed, 33 insertions(+) diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 41788c0bdd..eb56a228a2 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -120,6 +120,14 @@ size_t qemu_ram_pagesize_largest(void); */ void cpu_address_space_init(CPUState *cpu, int asidx, const char *prefix, MemoryRegion *mr); +/** + * cpu_address_space_destroy: + * @cpu: CPU for which address space needs to be destroyed + * @asidx: integer index of this address space + * + * Note that with KVM only one address space is supported. + */ +void cpu_address_space_destroy(CPUState *cpu, int asidx); void cpu_physical_memory_rw(hwaddr addr, void *buf, hwaddr len, bool is_write); diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h index 92a4234439..c90cf3a162 100644 --- a/include/hw/core/cpu.h +++ b/include/hw/core/cpu.h @@ -366,6 +366,7 @@ struct CPUState { QSIMPLEQ_HEAD(, qemu_work_item) work_list; CPUAddressSpace *cpu_ases; + int cpu_ases_ref_count; int num_ases; AddressSpace *as; MemoryRegion *memory; diff --git a/softmmu/physmem.c b/softmmu/physmem.c index 18277ddd67..c75e3e8042 100644 --- a/softmmu/physmem.c +++ b/softmmu/physmem.c @@ -761,6 +761,7 @@ void cpu_address_space_init(CPUState *cpu, int asidx, if (!cpu->cpu_ases) { cpu->cpu_ases = g_new0(CPUAddressSpace, cpu->num_ases); + cpu->cpu_ases_ref_count = cpu->num_ases; } newas = &cpu->cpu_ases[asidx]; @@ -774,6 +775,29 @@ void cpu_address_space_init(CPUState *cpu, int asidx, } } +void cpu_address_space_destroy(CPUState *cpu, int asidx) +{ + CPUAddressSpace *cpuas; + + assert(asidx < cpu->num_ases); + assert(asidx == 0 || !kvm_enabled()); + assert(cpu->cpu_ases); + + cpuas = &cpu->cpu_ases[asidx]; + if (tcg_enabled()) { + memory_listener_unregister(&cpuas->tcg_as_listener); + } + + address_space_destroy(cpuas->as); + + cpu->cpu_ases_ref_count--; + if (cpu->cpu_ases_ref_count == 0) { + g_free(cpu->cpu_ases); + cpu->cpu_ases = NULL; + } + +} + AddressSpace *cpu_get_address_space(CPUState *cpu, int asidx) { /* Return the AddressSpace corresponding to the specified index */ -- 2.41.0
