From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59420) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gEqm3-0008Nf-HZ for qemu-devel@nongnu.org; Tue, 23 Oct 2018 03:06:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gEqig-0003xk-3E for qemu-devel@nongnu.org; Tue, 23 Oct 2018 03:03:17 -0400 Received: from mail-wr1-x444.google.com ([2a00:1450:4864:20::444]:44866) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gEqif-0003wn-S2 for qemu-devel@nongnu.org; Tue, 23 Oct 2018 03:03:14 -0400 Received: by mail-wr1-x444.google.com with SMTP id q6-v6so348027wrw.11 for ; Tue, 23 Oct 2018 00:03:13 -0700 (PDT) From: Richard Henderson Date: Tue, 23 Oct 2018 08:02:53 +0100 Message-Id: <20181023070253.6407-12-richard.henderson@linaro.org> In-Reply-To: <20181023070253.6407-1-richard.henderson@linaro.org> References: <20181023070253.6407-1-richard.henderson@linaro.org> Subject: [Qemu-devel] [PATCH 10/10] cputlb: Remove tlb_c.pending_flushes List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: cota@braap.org This is essentially redundant with tlb_c.dirty. [??? Collect data to back up this supposition] Signed-off-by: Richard Henderson --- include/exec/cpu-defs.h | 6 ------ accel/tcg/cputlb.c | 16 ++-------------- 2 files changed, 2 insertions(+), 20 deletions(-) diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h index ca0fea8b27..6a60f94a41 100644 --- a/include/exec/cpu-defs.h +++ b/include/exec/cpu-defs.h @@ -160,12 +160,6 @@ typedef struct CPUTLBDesc { typedef struct CPUTLBCommon { /* Serialize updates to tlb_table and tlb_v_table, and others as noted. */ QemuSpin lock; - /* - * Within pending_flush, for each bit N, there exists an outstanding - * cross-cpu flush for mmu_idx N. Further cross-cpu flushes to that - * mmu_idx may be discarded. Protected by tlb_c.lock. - */ - uint16_t pending_flush; /* * Within dirty, for each bit N, modifications have been made to * mmu_idx N since the last time that mmu_idx was flushed. diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index c1b92083d4..fec37bd3bd 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -174,20 +174,8 @@ void tlb_flush_by_mmuidx(CPUState *cpu, uint16_t idxmap) tlb_debug("mmu_idx: 0x%" PRIx16 "\n", idxmap); if (cpu->created && !qemu_cpu_is_self(cpu)) { - CPUArchState *env = cpu->env_ptr; - uint16_t pending, to_clean; - - qemu_spin_lock(&env->tlb_c.lock); - pending = env->tlb_c.pending_flush; - to_clean = idxmap & ~pending; - env->tlb_c.pending_flush = pending | idxmap; - qemu_spin_unlock(&env->tlb_c.lock); - - if (to_clean) { - tlb_debug("reduced mmu_idx: 0x%" PRIx16 "\n", to_clean); - async_run_on_cpu(cpu, tlb_flush_by_mmuidx_async_work, - RUN_ON_CPU_HOST_INT(to_clean)); - } + async_run_on_cpu(cpu, tlb_flush_by_mmuidx_async_work, + RUN_ON_CPU_HOST_INT(idxmap)); } else { tlb_flush_by_mmuidx_async_work(cpu, RUN_ON_CPU_HOST_INT(idxmap)); } -- 2.17.2