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accel/tcg: Introduce tb_{set_}page_addr{0,1}

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This data structure will be replaced for user-only: add accessors.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-09-20 13:21:40 +02:00
parent 4c88475c9f
commit 28905cfbd5
5 changed files with 55 additions and 30 deletions
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9
accel/tcg/cpu-exec.c
View file

@ -187,13 +187,14 @@ static bool tb_lookup_cmp(const void *p, const void *d)
const struct tb_desc *desc = d;
if ((TARGET_TB_PCREL || tb_pc(tb) == desc->pc) &&
tb->page_addr[0] == desc->page_addr0 &&
tb_page_addr0(tb) == desc->page_addr0 &&
tb->cs_base == desc->cs_base &&
tb->flags == desc->flags &&
tb->trace_vcpu_dstate == desc->trace_vcpu_dstate &&
tb_cflags(tb) == desc->cflags) {
/* check next page if needed */
if (tb->page_addr[1] == -1) {
tb_page_addr_t tb_phys_page1 = tb_page_addr1(tb);
if (tb_phys_page1 == -1) {
return true;
} else {
tb_page_addr_t phys_page1;
@ -210,7 +211,7 @@ static bool tb_lookup_cmp(const void *p, const void *d)
*/
virt_page1 = TARGET_PAGE_ALIGN(desc->pc);
phys_page1 = get_page_addr_code(desc->env, virt_page1);
if (tb->page_addr[1] == phys_page1) {
if (tb_phys_page1 == phys_page1) {
return true;
}
}
@ -1019,7 +1020,7 @@ int cpu_exec(CPUState *cpu)
* direct jump to a TB spanning two pages because the mapping
* for the second page can change.
*/
if (tb->page_addr[1] != -1) {
if (tb_page_addr1(tb) != -1) {
last_tb = NULL;
}
#endif

29
accel/tcg/tb-maint.c
View file

@ -44,8 +44,8 @@ static bool tb_cmp(const void *ap, const void *bp)
a->flags == b->flags &&
(tb_cflags(a) & ~CF_INVALID) == (tb_cflags(b) & ~CF_INVALID) &&
a->trace_vcpu_dstate == b->trace_vcpu_dstate &&
a->page_addr[0] == b->page_addr[0] &&
a->page_addr[1] == b->page_addr[1]);
tb_page_addr0(a) == tb_page_addr0(b) &&
tb_page_addr1(a) == tb_page_addr1(b));
}
void tb_htable_init(void)
@ -273,7 +273,7 @@ static void do_tb_phys_invalidate(TranslationBlock *tb, bool rm_from_page_list)
qemu_spin_unlock(&tb->jmp_lock);
/* remove the TB from the hash list */
phys_pc = tb->page_addr[0];
phys_pc = tb_page_addr0(tb);
h = tb_hash_func(phys_pc, (TARGET_TB_PCREL ? 0 : tb_pc(tb)),
tb->flags, orig_cflags, tb->trace_vcpu_dstate);
if (!qht_remove(&tb_ctx.htable, tb, h)) {
@ -282,10 +282,11 @@ static void do_tb_phys_invalidate(TranslationBlock *tb, bool rm_from_page_list)
/* remove the TB from the page list */
if (rm_from_page_list) {
p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
p = page_find(phys_pc >> TARGET_PAGE_BITS);
tb_page_remove(p, tb);
if (tb->page_addr[1] != -1) {
p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
phys_pc = tb_page_addr1(tb);
if (phys_pc != -1) {
p = page_find(phys_pc >> TARGET_PAGE_BITS);
tb_page_remove(p, tb);
}
}
@ -358,16 +359,16 @@ static inline void page_unlock_tb(const TranslationBlock *tb) { }
/* lock the page(s) of a TB in the correct acquisition order */
static void page_lock_tb(const TranslationBlock *tb)
{
page_lock_pair(NULL, tb->page_addr[0], NULL, tb->page_addr[1], false);
page_lock_pair(NULL, tb_page_addr0(tb), NULL, tb_page_addr1(tb), false);
}
static void page_unlock_tb(const TranslationBlock *tb)
{
PageDesc *p1 = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
PageDesc *p1 = page_find(tb_page_addr0(tb) >> TARGET_PAGE_BITS);
page_unlock(p1);
if (unlikely(tb->page_addr[1] != -1)) {
PageDesc *p2 = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
if (unlikely(tb_page_addr1(tb) != -1)) {
PageDesc *p2 = page_find(tb_page_addr1(tb) >> TARGET_PAGE_BITS);
if (p2 != p1) {
page_unlock(p2);
@ -382,7 +383,7 @@ static void page_unlock_tb(const TranslationBlock *tb)
*/
void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr)
{
if (page_addr == -1 && tb->page_addr[0] != -1) {
if (page_addr == -1 && tb_page_addr0(tb) != -1) {
page_lock_tb(tb);
do_tb_phys_invalidate(tb, true);
page_unlock_tb(tb);
@ -516,11 +517,11 @@ tb_invalidate_phys_page_range__locked(struct page_collection *pages,
if (n == 0) {
/* NOTE: tb_end may be after the end of the page, but
it is not a problem */
tb_start = tb->page_addr[0];
tb_start = tb_page_addr0(tb);
tb_end = tb_start + tb->size;
} else {
tb_start = tb->page_addr[1];
tb_end = tb_start + ((tb->page_addr[0] + tb->size)
tb_start = tb_page_addr1(tb);
tb_end = tb_start + ((tb_page_addr0(tb) + tb->size)
& ~TARGET_PAGE_MASK);
}
if (!(tb_end <= start || tb_start >= end)) {

16
accel/tcg/translate-all.c
View file

@ -698,9 +698,9 @@ page_collection_lock(tb_page_addr_t start, tb_page_addr_t end)
}
assert_page_locked(pd);
PAGE_FOR_EACH_TB(pd, tb, n) {
if (page_trylock_add(set, tb->page_addr[0]) ||
(tb->page_addr[1] != -1 &&
page_trylock_add(set, tb->page_addr[1]))) {
if (page_trylock_add(set, tb_page_addr0(tb)) ||
(tb_page_addr1(tb) != -1 &&
page_trylock_add(set, tb_page_addr1(tb)))) {
/* drop all locks, and reacquire in order */
g_tree_foreach(set->tree, page_entry_unlock, NULL);
goto retry;
@ -771,8 +771,8 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
tb->flags = flags;
tb->cflags = cflags;
tb->trace_vcpu_dstate = *cpu->trace_dstate;
tb->page_addr[0] = phys_pc;
tb->page_addr[1] = -1;
tb_set_page_addr0(tb, phys_pc);
tb_set_page_addr1(tb, -1);
tcg_ctx->tb_cflags = cflags;
tb_overflow:
@ -970,7 +970,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
* a temporary one-insn TB, and we have nothing left to do. Return early
* before attempting to link to other TBs or add to the lookup table.
*/
if (tb->page_addr[0] == -1) {
if (tb_page_addr0(tb) == -1) {
return tb;
}
@ -985,7 +985,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
* No explicit memory barrier is required -- tb_link_page() makes the
* TB visible in a consistent state.
*/
existing_tb = tb_link_page(tb, tb->page_addr[0], tb->page_addr[1]);
existing_tb = tb_link_page(tb, tb_page_addr0(tb), tb_page_addr1(tb));
/* if the TB already exists, discard what we just translated */
if (unlikely(existing_tb != tb)) {
uintptr_t orig_aligned = (uintptr_t)gen_code_buf;
@ -1140,7 +1140,7 @@ static gboolean tb_tree_stats_iter(gpointer key, gpointer value, gpointer data)
if (tb->size > tst->max_target_size) {
tst->max_target_size = tb->size;
}
if (tb->page_addr[1] != -1) {
if (tb_page_addr1(tb) != -1) {
tst->cross_page++;
}
if (tb->jmp_reset_offset[0] != TB_JMP_RESET_OFFSET_INVALID) {

9
accel/tcg/translator.c
View file

@ -157,7 +157,7 @@ static void *translator_access(CPUArchState *env, DisasContextBase *db,
tb = db->tb;
/* Use slow path if first page is MMIO. */
if (unlikely(tb->page_addr[0] == -1)) {
if (unlikely(tb_page_addr0(tb) == -1)) {
return NULL;
}
@ -169,13 +169,14 @@ static void *translator_access(CPUArchState *env, DisasContextBase *db,
host = db->host_addr[1];
base = TARGET_PAGE_ALIGN(db->pc_first);
if (host == NULL) {
tb->page_addr[1] =
tb_page_addr_t phys_page =
get_page_addr_code_hostp(env, base, &db->host_addr[1]);
/* We cannot handle MMIO as second page. */
assert(phys_page != -1);
tb_set_page_addr1(tb, phys_page);
#ifdef CONFIG_USER_ONLY
page_protect(end);
#endif
/* We cannot handle MMIO as second page. */
assert(tb->page_addr[1] != -1);
host = db->host_addr[1];
}

22
include/exec/exec-all.h
View file

@ -610,6 +610,28 @@ static inline uint32_t tb_cflags(const TranslationBlock *tb)
return qatomic_read(&tb->cflags);
}
static inline tb_page_addr_t tb_page_addr0(const TranslationBlock *tb)
{
return tb->page_addr[0];
}
static inline tb_page_addr_t tb_page_addr1(const TranslationBlock *tb)
{
return tb->page_addr[1];
}
static inline void tb_set_page_addr0(TranslationBlock *tb,
tb_page_addr_t addr)
{
tb->page_addr[0] = addr;
}
static inline void tb_set_page_addr1(TranslationBlock *tb,
tb_page_addr_t addr)
{
tb->page_addr[1] = addr;
}
/* current cflags for hashing/comparison */
uint32_t curr_cflags(CPUState *cpu);