From b7542f7fe8f879b7b1e74f5fbd36b5746dbb6712 Mon Sep 17 00:00:00 2001 From: "Emilio G. Cota" Date: Fri, 4 Aug 2017 18:58:37 -0400 Subject: [PATCH] cputlb: remove tb_lock from tlb_flush functions MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The acquisition of tb_lock was added when the async tlb_flush was introduced in e3b9ca810 ("cputlb: introduce tlb_flush_* async work.") tb_lock was there to allow us to do memset() on the tb_jmp_cache's. However, since f3ced3c5928 ("tcg: consistently access cpu->tb_jmp_cache atomically") all accesses to tb_jmp_cache are atomic, so tb_lock is not needed here. Get rid of it. Reviewed-by: Alex Bennée Reviewed-by: Richard Henderson Signed-off-by: Emilio G. Cota Signed-off-by: Richard Henderson --- accel/tcg/cputlb.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index 0a721bb9c4..719cca2268 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -125,8 +125,6 @@ static void tlb_flush_nocheck(CPUState *cpu) atomic_set(&env->tlb_flush_count, env->tlb_flush_count + 1); tlb_debug("(count: %zu)\n", tlb_flush_count()); - tb_lock(); - memset(env->tlb_table, -1, sizeof(env->tlb_table)); memset(env->tlb_v_table, -1, sizeof(env->tlb_v_table)); cpu_tb_jmp_cache_clear(cpu); @@ -135,8 +133,6 @@ static void tlb_flush_nocheck(CPUState *cpu) env->tlb_flush_addr = -1; env->tlb_flush_mask = 0; - tb_unlock(); - atomic_mb_set(&cpu->pending_tlb_flush, 0); } @@ -180,8 +176,6 @@ static void tlb_flush_by_mmuidx_async_work(CPUState *cpu, run_on_cpu_data data) assert_cpu_is_self(cpu); - tb_lock(); - tlb_debug("start: mmu_idx:0x%04lx\n", mmu_idx_bitmask); for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) { @@ -197,8 +191,6 @@ static void tlb_flush_by_mmuidx_async_work(CPUState *cpu, run_on_cpu_data data) cpu_tb_jmp_cache_clear(cpu); tlb_debug("done\n"); - - tb_unlock(); } void tlb_flush_by_mmuidx(CPUState *cpu, uint16_t idxmap) -- 2.11.0