From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37427) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3a7b-0007wc-Cg for qemu-devel@nongnu.org; Wed, 26 Apr 2017 23:29:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3a7a-0001wv-A1 for qemu-devel@nongnu.org; Wed, 26 Apr 2017 23:29:35 -0400 From: "Emilio G. Cota" Date: Wed, 26 Apr 2017 23:29:15 -0400 Message-Id: <1493263764-18657-3-git-send-email-cota@braap.org> In-Reply-To: <1493263764-18657-1-git-send-email-cota@braap.org> References: <1493263764-18657-1-git-send-email-cota@braap.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v4 02/11] tcg-runtime: add lookup_tb_ptr helper List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Peter Crosthwaite , Richard Henderson , Peter Maydell , Eduardo Habkost , Andrzej Zaborowski , Aurelien Jarno , Alexander Graf , Stefan Weil , qemu-arm@nongnu.org, alex.bennee@linaro.org, Pranith Kumar This paves the way for upcoming work. Reviewed-by: Richard Henderson Reviewed-by: Alex Bennée Signed-off-by: Emilio G. Cota --- tcg-runtime.c | 24 ++++++++++++++++++++++++ tcg/tcg-runtime.h | 2 ++ tcg/tcg.h | 1 + 3 files changed, 27 insertions(+) diff --git a/tcg-runtime.c b/tcg-runtime.c index 4c60c96..8a24bdd 100644 --- a/tcg-runtime.c +++ b/tcg-runtime.c @@ -27,6 +27,7 @@ #include "exec/helper-proto.h" #include "exec/cpu_ldst.h" #include "exec/exec-all.h" +#include "exec/tb-hash.h" /* 32-bit helpers */ @@ -141,6 +142,29 @@ uint64_t HELPER(ctpop_i64)(uint64_t arg) return ctpop64(arg); } +void *HELPER(lookup_tb_ptr)(CPUArchState *env, target_ulong addr) +{ + CPUState *cpu = ENV_GET_CPU(env); + TranslationBlock *tb; + target_ulong cs_base, pc; + uint32_t flags; + + tb = atomic_rcu_read(&cpu->tb_jmp_cache[tb_jmp_cache_hash_func(addr)]); + if (likely(tb)) { + cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags); + if (likely(tb->pc == addr && tb->cs_base == cs_base && + tb->flags == flags)) { + return tb->tc_ptr; + } + tb = tb_htable_lookup(cpu, pc, cs_base, flags); + if (likely(tb)) { + atomic_set(&cpu->tb_jmp_cache[tb_jmp_cache_hash_func(addr)], tb); + return tb->tc_ptr; + } + } + return tcg_ctx.code_gen_epilogue; +} + void HELPER(exit_atomic)(CPUArchState *env) { cpu_loop_exit_atomic(ENV_GET_CPU(env), GETPC()); diff --git a/tcg/tcg-runtime.h b/tcg/tcg-runtime.h index 114ea6f..c41d38a 100644 --- a/tcg/tcg-runtime.h +++ b/tcg/tcg-runtime.h @@ -24,6 +24,8 @@ DEF_HELPER_FLAGS_1(clrsb_i64, TCG_CALL_NO_RWG_SE, i64, i64) DEF_HELPER_FLAGS_1(ctpop_i32, TCG_CALL_NO_RWG_SE, i32, i32) DEF_HELPER_FLAGS_1(ctpop_i64, TCG_CALL_NO_RWG_SE, i64, i64) +DEF_HELPER_FLAGS_2(lookup_tb_ptr, TCG_CALL_NO_WG_SE, ptr, env, tl) + DEF_HELPER_FLAGS_1(exit_atomic, TCG_CALL_NO_WG, noreturn, env) #ifdef CONFIG_SOFTMMU diff --git a/tcg/tcg.h b/tcg/tcg.h index 6c216bb..5ec48d1 100644 --- a/tcg/tcg.h +++ b/tcg/tcg.h @@ -699,6 +699,7 @@ struct TCGContext { extension that allows arithmetic on void*. */ int code_gen_max_blocks; void *code_gen_prologue; + void *code_gen_epilogue; void *code_gen_buffer; size_t code_gen_buffer_size; void *code_gen_ptr; -- 2.7.4