From mboxrd@z Thu Jan 1 00:00:00 1970 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 9F6EACAC5BB for ; Wed, 8 Oct 2025 22:08:07 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v6cDz-0001lx-RL; Wed, 08 Oct 2025 18:01:35 -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 1v6cD7-0001AD-5X for qemu-devel@nongnu.org; Wed, 08 Oct 2025 18:00:38 -0400 Received: from mail-pf1-x42e.google.com ([2607:f8b0:4864:20::42e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1v6cCT-0007OB-4x for qemu-devel@nongnu.org; Wed, 08 Oct 2025 18:00:36 -0400 Received: by mail-pf1-x42e.google.com with SMTP id d2e1a72fcca58-781ea2cee3fso308737b3a.0 for ; Wed, 08 Oct 2025 14:59:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1759960789; x=1760565589; darn=nongnu.org; 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=NDFNMEH1J1ZxzHPI3obv5zb1hQFKVpn2hQk3PxQwc3A=; b=yCo7zLccpUJ9u+ZUFM/1Am7K+IJM5qn+5dDlEi29hXzPo8Rukgl98swtVvIktfUeFM U5vQIdGpIFocTRUeXGuI2qklW49CWOoVbTjj4zDqaaU1r0dkYF4KM9Tx7oRogFBMTBtg JmnjRaLkHx28nfIytZZreQkNbfRRm5Jgk6P0G6529cM5OPwJlj+Ly5Egs7RbBMv5ECa+ ZY03R50Ce+4pTMgpZ8zP2mCVAXB1E6ZeDi0LUktgxfKpPu2CZ6ab93/sB9EJCc87a0wv zK0A5v7WK6uyHVC6XsBATpkdJ9rDxTTEUB3LvdJDRTZbEL51SsnX5faC8lKvZp9aA3IE Bw4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1759960789; x=1760565589; 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=NDFNMEH1J1ZxzHPI3obv5zb1hQFKVpn2hQk3PxQwc3A=; b=v4VYQgCibokm7FbB9BQ+cdtD7iu5oCc7qzSH3QuYs0BoLJhqgGvqGObb9ggjE4+Njy n6pbFjhhErRDNa6gotxpLOhWkv/2s+oOz2TeX5QrD4cEZ+Hh7vtSr17N5H7Id7nPs9Jp I7akanJG7Wb5kwhK24JJvXHfniptLKGzFGHai/u98Oqqd37VGKJ3r7AiN0UcPFeignGL jENIR+PwQw7f3OyoNb5hbXCMBXrBLNDDE0DY8DBwLs+NGktCM1rDhQOG/QpsSp7IgxOh zbbUYyhGWV4HlS89GAZctFtDE7JbA3V0QMJtmHXXXV6MWfIAKo0M6VEHAKbJ8x6+zUnH Eh7Q== X-Gm-Message-State: AOJu0Ywe5yt+iMTX7F41LA946s49twIxQgSP8D9SrMzyczo+oEg+z1Qr os1AbbUVZg37NttjUZkL145A20SF+lwAYFVs9UKXsZtH4vp51oChWg4ez5uei9ijYF480nwiKoz SYpuz/B8= X-Gm-Gg: ASbGnctycscFbuZ52Ux/9kpEEcsWf5BqtLRd7zQTEDKicvmgwkMBoV/XTsxjOQnd1wU hS0zapR24FHG1ScW47gDZ22gJ27lIPMjRuBxodzyYdKpwgKjb6WfN08zwkdJlUoPlXVRNAeX/Fo EsAk3Km2+K64iQBWBc9Ue1rS/oDoxPsevuo1/U91NqOPMDsVg5nxjdieZzPK4uH6T2ZQZeKpRt0 gbmStSonkw93331g1iMQqCJK1t0uPKWN4Qw7b/PJBcAXEjltoaWTWcvRWl7Upn2obTJtxDGmm2c evZ470a7oXj5NcqhdWd448iq7dMrDsYWPC9aywUqXqAZdGXKXuxO1qYllUHEM8y3u8MfVu6sokW /sfYnCHXcZDLRNHZhMvxqlblZSOYDrLT13bJaabCEGPtqmtxutTAKEahhuiYroSDeYmk= X-Google-Smtp-Source: AGHT+IHz7GuhxZTwbKprMWmdPJXpgA+F+YT6qRwPuPsQWgtfVuM3qPxLMXg+qvVL5nYqB7MdU9rtZA== X-Received: by 2002:a05:6a00:6518:b0:784:5d3a:5f63 with SMTP id d2e1a72fcca58-79385327962mr4822220b3a.2.1759960789353; Wed, 08 Oct 2025 14:59:49 -0700 (PDT) Received: from stoup.. ([71.212.157.132]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-794e1fc9db6sm740724b3a.66.2025.10.08.14.59.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Oct 2025 14:59:49 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, Pierrick Bouvier Subject: [PATCH v7 53/73] target/arm: Implement GCSSS1 Date: Wed, 8 Oct 2025 14:55:53 -0700 Message-ID: <20251008215613.300150-54-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251008215613.300150-1-richard.henderson@linaro.org> References: <20251008215613.300150-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::42e; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42e.google.com X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, DKIM_INVALID=0.1, DKIM_SIGNED=0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, T_SPF_TEMPERROR=0.01 autolearn=no 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 Reviewed-by: Pierrick Bouvier Signed-off-by: Richard Henderson --- target/arm/cpregs.h | 1 + target/arm/cpregs-gcs.c | 3 +++ target/arm/tcg/translate-a64.c | 30 ++++++++++++++++++++++++++++++ 3 files changed, 34 insertions(+) diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h index 6d9145109f..e7e7050880 100644 --- a/target/arm/cpregs.h +++ b/target/arm/cpregs.h @@ -53,6 +53,7 @@ enum { ARM_CP_GCSPUSHX = 0x000a, ARM_CP_GCSPOPX = 0x000b, ARM_CP_GCSPOPCX = 0x000c, + ARM_CP_GCSSS1 = 0x000d, /* Flag: reads produce resetvalue; writes ignored. */ ARM_CP_CONST = 1 << 4, diff --git a/target/arm/cpregs-gcs.c b/target/arm/cpregs-gcs.c index 3795bf7f36..eda5c498d7 100644 --- a/target/arm/cpregs-gcs.c +++ b/target/arm/cpregs-gcs.c @@ -129,6 +129,9 @@ static const ARMCPRegInfo gcs_reginfo[] = { { .name = "GCSPOPM", .state = ARM_CP_STATE_AA64, .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 7, .opc2 = 1, .access = PL0_R, .type = ARM_CP_GCSPOPM }, + { .name = "GCSSS1", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 7, .opc2 = 2, + .access = PL0_W, .type = ARM_CP_GCSSS1 }, { .name = "GCSPUSHX", .state = ARM_CP_STATE_AA64, .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 7, .opc2 = 4, .access = PL1_W, .accessfn = access_gcspushx, .fgt = FGT_NGCSEPP, diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c index bb8ffba586..82ddf4e1dc 100644 --- a/target/arm/tcg/translate-a64.c +++ b/target/arm/tcg/translate-a64.c @@ -2643,6 +2643,31 @@ static void gen_gcspopx(DisasContext *s) tcg_gen_addi_i64(gcspr, addr, 8); } +static void gen_gcsss1(DisasContext *s, int rt) +{ + TCGv_i64 gcspr = cpu_gcspr[s->current_el]; + int mmuidx = core_gcs_mem_index(s->mmu_idx); + MemOp mop = finalize_memop(s, MO_64 | MO_ALIGN); + TCGv_i64 inptr = cpu_reg(s, rt); + TCGv_i64 cmp = tcg_temp_new_i64(); + TCGv_i64 new = tcg_temp_new_i64(); + TCGv_i64 old = tcg_temp_new_i64(); + TCGLabel *fail_label = + delay_exception(s, EXCP_UDEF, syn_gcs_data_check(GCS_IT_GCSSS1, rt)); + + /* Compute the valid cap entry that the new stack must have. */ + tcg_gen_deposit_i64(cmp, inptr, tcg_constant_i64(1), 0, 12); + /* Compute the in-progress cap entry for the old stack. */ + tcg_gen_deposit_i64(new, gcspr, tcg_constant_i64(5), 0, 3); + + /* Swap the valid cap the with the in-progress cap. */ + tcg_gen_atomic_cmpxchg_i64(old, inptr, cmp, new, mmuidx, mop); + tcg_gen_brcond_i64(TCG_COND_NE, old, cmp, fail_label); + + /* The new stack had a valid cap: change gcspr. */ + tcg_gen_andi_i64(gcspr, inptr, ~7); +} + /* * Look up @key, returning the cpreg, which must exist. * Additionally, the new cpreg must also be accessible. @@ -2984,6 +3009,11 @@ static void handle_sys(DisasContext *s, bool isread, gen_gcspopx(s); } return; + case ARM_CP_GCSSS1: + if (s->gcs_en) { + gen_gcsss1(s, rt); + } + return; default: g_assert_not_reached(); } -- 2.43.0