From patchwork Mon Jun 5 11:23:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Piggin X-Patchwork-Id: 13267234 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7F193C7EE24 for ; Mon, 5 Jun 2023 11:24:53 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1q68JS-00077i-30; Mon, 05 Jun 2023 07:23:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q68JO-00076I-4e; Mon, 05 Jun 2023 07:23:46 -0400 Received: from mail-pj1-x1034.google.com ([2607:f8b0:4864:20::1034]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1q68JL-00066C-DE; Mon, 05 Jun 2023 07:23:44 -0400 Received: by mail-pj1-x1034.google.com with SMTP id 98e67ed59e1d1-256e1d87998so3973032a91.3; Mon, 05 Jun 2023 04:23:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1685964221; x=1688556221; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=+zDOlRWUdwkqrj6xE/PQNHSscfk1SuhL8JkNfMoqHPQ=; b=dDS90VQbe5z1sDPlE3P1VypZVuMaIXbJ71oKxd15e10+BiTHkAF4es4bDyfH0pncT/ M/xF6VcfWqhBV6BmT0KYxQrDJj+XGnL7SnnDpayWhWy5wwXQNHBRnD8y/X6NnYdYBHAe tF1rMxlBKA5yPqLvNKsXHMkoF6Pwcg8MuI1/3fL/3ZCqVusHX/AfocF1xWZxvHZinCUm /tGcxTch2aXNDfq15G9kmMwFfCw5WBSf27gOJIzKkGA7EXwDjukyHy7twgub/N8R46Qx EKw6UUuubvMLGtduu+qnrda4cIvFqDtCcoLmbvxOr8EKNujftfgoEwfOkUr0aDQL2Txs PEYA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685964221; x=1688556221; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=+zDOlRWUdwkqrj6xE/PQNHSscfk1SuhL8JkNfMoqHPQ=; b=RLXpcQ5UDvR8x7S236NiTvmfW186NFFczm3PcrNAos+8Qcl4VrfaHDIRn4Vkv8xp9r /DrupX3JQOiGGNN/4YqD+byvNLJm/+YcmmKhP0dRl2LLLUIu8QjKUjhGenhTZlXd8Mbu u/i6eoI5QRnMgJ3yxjPHUvHnfexRWioKn8c3d/3jdG8JFPuTGclT4LI4j7EWce4Hs0pp g/vLLHMwSi9PY542JrQlroc9eBmkDKgv2i52VIpkMrosZUYEylAHhGAI8aJcAUggC+eS XDGZ8DfMsSrnLa/Ikie4wNBmUOIAtxQpN2OuEtlzjlopN20AcVjttZTPqfjZBNShUZGe JE3A== X-Gm-Message-State: AC+VfDwx4WK+QsGcL4OZCxcci9daeESeotGxasmVkmEKa0pFqN/pQHsE ArrvgtMp50ZWuhKw+LPRyDNBhKSoric= X-Google-Smtp-Source: ACHHUZ6nyUllZqAE/zWlV9LbDxp4/kLr5mvQy6hTzqxC8hsXQ+W4ON6Vxlb1P7MkZC5fdSFNPchhhg== X-Received: by 2002:a17:90a:11:b0:255:d878:704a with SMTP id 17-20020a17090a001100b00255d878704amr7315091pja.4.1685964221397; Mon, 05 Jun 2023 04:23:41 -0700 (PDT) Received: from wheely.local0.net ([203.221.142.9]) by smtp.gmail.com with ESMTPSA id f32-20020a17090a702300b0024e026444b6sm15953385pjk.2.2023.06.05.04.23.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Jun 2023 04:23:40 -0700 (PDT) From: Nicholas Piggin To: qemu-ppc@nongnu.org Cc: Nicholas Piggin , qemu-devel@nongnu.org, Daniel Henrique Barboza , =?utf-8?q?C=C3=A9dric_?= =?utf-8?q?Le_Goater?= Subject: [PATCH 1/4] target/ppc: Add initial flags and helpers for SMT support Date: Mon, 5 Jun 2023 21:23:20 +1000 Message-Id: <20230605112323.179259-2-npiggin@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230605112323.179259-1-npiggin@gmail.com> References: <20230605112323.179259-1-npiggin@gmail.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::1034; envelope-from=npiggin@gmail.com; helo=mail-pj1-x1034.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org SMT TCG emulation needs to be able to iterate over siblings in a core, and needs to serialise core access to shared SPRs and state. Signed-off-by: Nicholas Piggin --- target/ppc/cpu.h | 9 +++++++++ target/ppc/cpu_init.c | 5 +++++ target/ppc/translate.c | 20 ++++++++++++++++++++ 3 files changed, 34 insertions(+) diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index 1f23b81e90..b594408a8d 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -672,6 +672,8 @@ enum { POWERPC_FLAG_TM = 0x00100000, /* Has SCV (ISA 3.00) */ POWERPC_FLAG_SCV = 0x00200000, + /* Has >1 thread per core */ + POWERPC_FLAG_SMT = 0x00400000, }; /* @@ -1266,6 +1268,13 @@ struct CPUArchState { uint64_t pmu_base_time; }; +#define _CORE_ID(cs) \ + (POWERPC_CPU(cs)->env.spr_cb[SPR_PIR].default_value & ~(cs->nr_threads - 1)) + +#define THREAD_SIBLING_FOREACH(cs, cs_sibling) \ + CPU_FOREACH(cs_sibling) \ + if (_CORE_ID(cs) == _CORE_ID(cs_sibling)) + #define SET_FIT_PERIOD(a_, b_, c_, d_) \ do { \ env->fit_period[0] = (a_); \ diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c index aa364f36f6..5035f6dada 100644 --- a/target/ppc/cpu_init.c +++ b/target/ppc/cpu_init.c @@ -6754,6 +6754,7 @@ static void ppc_cpu_realize(DeviceState *dev, Error **errp) { CPUState *cs = CPU(dev); PowerPCCPU *cpu = POWERPC_CPU(dev); + CPUPPCState *env = &cpu->env; PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); Error *local_err = NULL; @@ -6785,6 +6786,10 @@ static void ppc_cpu_realize(DeviceState *dev, Error **errp) pcc->parent_realize(dev, errp); + if (env_cpu(env)->nr_threads > 1) { + env->flags |= POWERPC_FLAG_SMT; + } + return; unrealize: diff --git a/target/ppc/translate.c b/target/ppc/translate.c index b6bab4c234..72270c2163 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -227,6 +227,26 @@ struct opc_handler_t { void (*handler)(DisasContext *ctx); }; +static inline bool gen_serialize(DisasContext *ctx) +{ + if (tb_cflags(ctx->base.tb) & CF_PARALLEL) { + /* Restart with exclusive lock. */ + gen_helper_exit_atomic(cpu_env); + ctx->base.is_jmp = DISAS_NORETURN; + return false; + } + return true; +} + +static inline bool gen_serialize_core(DisasContext *ctx) +{ + if (ctx->flags & POWERPC_FLAG_SMT) { + return gen_serialize(ctx); + } + + return true; +} + /* SPR load/store helpers */ static inline void gen_load_spr(TCGv t, int reg) {