mirror of
https://github.com/yuzu-emu/unicorn
synced 2024-11-24 17:28:13 +00:00
b90333a531
This shares an cached empty FlatView among address spaces. The empty
FV is used every time when a root MR renders into a FV without memory
sections which happens when MR or its children are not enabled or
zero-sized. The empty_view is not NULL to keep the rest of memory
API intact; it also has a dispatch tree for the same reason.
On POWER8 with 255 CPUs, 255 virtio-net, 40 PCI bridges guest this halves
the amount of FlatView's in use (557 -> 260) and dispatch tables
(~800000 -> ~370000). In an unrelated experiment with 112 non-virtio
devices on x86 ("-M pc"), only 4 FlatViews are alive, and about ~2000
are created at startup.
Backports commit 092aa2fc65b7a35121616aad8f39d47b8f921618 from qemu
117 lines
3.2 KiB
C
117 lines
3.2 KiB
C
#ifndef UNICORN_COMMON_H_
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#define UNICORN_COMMON_H_
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#include "tcg.h"
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// This header define common patterns/codes that will be included in all arch-sepcific
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// codes for unicorns purposes.
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// return true on success, false on failure
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static inline bool cpu_physical_mem_read(AddressSpace *as, hwaddr addr,
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uint8_t *buf, int len)
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{
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return !cpu_physical_memory_rw(as, addr, (void *)buf, len, 0);
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}
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static inline bool cpu_physical_mem_write(AddressSpace *as, hwaddr addr,
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const uint8_t *buf, int len)
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{
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return !cpu_physical_memory_rw(as, addr, (void *)buf, len, 1);
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}
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void tb_cleanup(struct uc_struct *uc);
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void free_code_gen_buffer(struct uc_struct *uc);
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static inline void free_address_spaces(struct uc_struct *uc)
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{
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int i;
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address_space_destroy(&uc->as);
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for (i = 0; i < uc->cpu->num_ases; i++) {
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AddressSpace *as = uc->cpu->cpu_ases[i].as;
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address_space_destroy(as);
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g_free(as);
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}
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}
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/* This is *supposed* to be done by the class finalizer but it never executes */
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static inline void free_machine_class_name(struct uc_struct *uc) {
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MachineClass *mc = MACHINE_GET_CLASS(uc, uc->machine_state);
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g_free(mc->name);
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mc->name = NULL;
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}
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static inline void free_tcg_temp_names(TCGContext *s)
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{
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#if TCG_TARGET_REG_BITS == 32
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int i;
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for (i = 0; i < s->nb_globals; i++) {
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TCGTemp *ts = &s->temps[i];
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if (ts->base_type == TCG_TYPE_I64) {
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if (ts->name && ((strcmp(ts->name+(strlen(ts->name)-2), "_0") == 0) ||
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(strcmp(ts->name+(strlen(ts->name)-2), "_1") == 0))) {
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free((void *)ts->name);
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}
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}
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}
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#endif
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}
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/** Freeing common resources */
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static void release_common(void *t)
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{
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TCGPool *po, *to;
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TCGContext *s = (TCGContext *)t;
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// Clean TCG.
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TCGOpDef* def = &s->tcg_op_defs[0];
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g_free(def->args_ct);
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g_free(def->sorted_args);
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g_free(s->tcg_op_defs);
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for (po = s->pool_first; po; po = to) {
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to = po->next;
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g_free(po);
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}
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tcg_pool_reset(s);
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g_hash_table_destroy(s->helpers);
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// Destory flat view hash table
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g_hash_table_destroy(s->uc->flat_views);
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unicorn_free_empty_flat_view(s->uc);
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// TODO(danghvu): these function is not available outside qemu
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// so we keep them here instead of outside uc_close.
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free_address_spaces(s->uc);
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memory_free(s->uc);
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tb_cleanup(s->uc);
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free_code_gen_buffer(s->uc);
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free_machine_class_name(s->uc);
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free_tcg_temp_names(s);
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}
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static inline void uc_common_init(struct uc_struct* uc)
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{
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memory_register_types(uc);
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uc->write_mem = cpu_physical_mem_write;
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uc->read_mem = cpu_physical_mem_read;
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uc->tcg_enabled = tcg_enabled;
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uc->tcg_exec_init = tcg_exec_init;
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uc->cpu_exec_init_all = cpu_exec_init_all;
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uc->vm_start = vm_start;
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uc->memory_map = memory_map;
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uc->memory_map_ptr = memory_map_ptr;
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uc->memory_unmap = memory_unmap;
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uc->readonly_mem = memory_region_set_readonly;
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uc->target_page_size = TARGET_PAGE_SIZE;
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uc->target_page_align = TARGET_PAGE_SIZE - 1;
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if (!uc->release) {
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uc->release = release_common;
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}
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}
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#endif
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