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[174.21.81.121]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20c8c35522fsm52811805ad.296.2024.10.13.11.47.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Oct 2024 11:47:35 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: =?utf-8?q?Alex_Benn=C3=A9e?= Subject: [PATCH v2 1/3] include/exec: Improve probe_access_full{, _mmu} documentation Date: Sun, 13 Oct 2024 11:47:31 -0700 Message-ID: <20241013184733.1423747-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241013184733.1423747-1-richard.henderson@linaro.org> References: <20241013184733.1423747-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::629; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x629.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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 Suggested-by: Alex Bennée Signed-off-by: Richard Henderson Reviewed-by: Pierrick Bouvier Reviewed-by: Alex Bennée --- include/exec/exec-all.h | 29 ++++++++++++++--------------- 1 file changed, 14 insertions(+), 15 deletions(-) diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index 72240ef426..2e4c4cc4b4 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -368,6 +368,13 @@ int probe_access_flags(CPUArchState *env, vaddr addr, int size, * The CPUTLBEntryFull structure returned via @pfull is transient * and must be consumed or copied immediately, before any further * access or changes to TLB @mmu_idx. + * + * This function will not fault if @nonfault is set, but will + * return TLB_INVALID_MASK if the page is not mapped, or is not + * accessible with @access_type. + * + * This function will return TLB_MMIO in order to force the access + * to be handled out-of-line if plugins wish to instrument the access. */ int probe_access_full(CPUArchState *env, vaddr addr, int size, MMUAccessType access_type, int mmu_idx, @@ -375,22 +382,14 @@ int probe_access_full(CPUArchState *env, vaddr addr, int size, CPUTLBEntryFull **pfull, uintptr_t retaddr); /** - * probe_access_mmu() - Like probe_access_full except cannot fault and - * doesn't trigger instrumentation. + * probe_access_full_mmu: + * Like probe_access_full, except: * - * @env: CPUArchState - * @vaddr: virtual address to probe - * @size: size of the probe - * @access_type: read, write or execute permission - * @mmu_idx: softmmu index - * @phost: ptr to return value host address or NULL - * @pfull: ptr to return value CPUTLBEntryFull structure or NULL - * - * The CPUTLBEntryFull structure returned via @pfull is transient - * and must be consumed or copied immediately, before any further - * access or changes to TLB @mmu_idx. - * - * Returns: TLB flags as per probe_access_flags() + * This function is intended to be used for page table accesses by + * the target mmu itself. Since such page walking happens while + * handling another potential mmu fault, this function never raises + * exceptions (akin to @nonfault true for probe_access_full). + * Likewise this function does not trigger plugin instrumentation. */ int probe_access_full_mmu(CPUArchState *env, vaddr addr, int size, MMUAccessType access_type, int mmu_idx, From patchwork Sun Oct 13 18:47:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 13833617 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 98493CF2579 for ; Sun, 13 Oct 2024 18:48:39 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t03d0-0001JO-U9; Sun, 13 Oct 2024 14:47:42 -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 1t03cy-0001Hu-EG for qemu-devel@nongnu.org; Sun, 13 Oct 2024 14:47:40 -0400 Received: from mail-pl1-x62a.google.com ([2607:f8b0:4864:20::62a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1t03cw-0002Su-IJ for qemu-devel@nongnu.org; Sun, 13 Oct 2024 14:47:40 -0400 Received: by mail-pl1-x62a.google.com with SMTP id d9443c01a7336-20cb7088cbcso13897995ad.0 for ; Sun, 13 Oct 2024 11:47:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1728845257; x=1729450057; 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=SF1qZZsN9Tce3zMt/Ww343xHn3LIQsfZL/xAHrr77pE=; b=LmwrBdA2lePbQS47fTiEqEtedR6qZ50j+BNFGnJVNpPkPY4o4+Tw5s+6B3MDmFf4UN hOzeQnw6XqkxeguYeod3xjNqY6d78W/PC/lKioJYm2mSZPkMzFrL3FFS0CJaIpmQdTZc mfCnex1ZCU1kpYoWtL0AxXM81vkyS7Cm6OaWIZPLj0v7kh6npFSbgroXAuATPJoxaill /D2kSS14X1JOmNqukVXH85JBecI178q2xDhS9yGo6Z1Y8uWd0rhSqJNjmnMlUppFgaMg Hz/r473GQG9ZBqepkuNIV7Cm8wNDiNhfxxQowd72YNm/hb6QndMt+GggmM4mXn4OIj5n PU3w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728845257; x=1729450057; 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=SF1qZZsN9Tce3zMt/Ww343xHn3LIQsfZL/xAHrr77pE=; b=SMOdxKMLyT6iiNwmtlI5pAd2cXSd1ZOrN/yYEALV9yIueUQQxKnpfxOGEesNCZ3WFM lTar7lbTb3xtc8DWC5PsQxm230cjbwVQJH+tD92RgvUQrcGxAs6QTBe5n9XvhIdIXD97 OWT/jzff/R96dqbu3NuAhFBO/2isdcWHa9pfJNMXwF+vCsH6QEdqcaVNZG+Di/NeB34K We3fJ2/wqTQVD6Rb4z+2iGLZi55LmS0OZ4BK76nouRA6VU2NFqe7oSSvbbqaefBlXy2/ +vzGmUH3fgUYJz5KjqGrrlN733+sZscjRFbJr5dVlmejyzdw9oVL6UCm8eUfP0YcTbiv jM8g== X-Gm-Message-State: AOJu0YymDI7BQpiGDH+BH2yR2L7JT+f961RHdzSnBCPcJ1kZcFG0WYcu DkfNqZAL/gofixET6ACfWcW/IFZ50lZyN7tdrhvk+dMoF7zlMqsjN2YwuDYLPzc5hbMFY8yreKN z X-Google-Smtp-Source: AGHT+IH34Gj+9ie+Ww5w99Nayxeq539t7+VFC56usb2+HbjbwkCaQnGw1VaJ0XIbNwvsU3RKZisR+g== X-Received: by 2002:a17:902:db0e:b0:20c:7720:59b8 with SMTP id d9443c01a7336-20ca142a448mr132609625ad.6.1728845257298; Sun, 13 Oct 2024 11:47:37 -0700 (PDT) Received: from stoup.. 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[174.21.81.121]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20c8c35522fsm52811805ad.296.2024.10.13.11.47.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Oct 2024 11:47:36 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Subject: [PATCH v2 2/3] target/i386: Use probe_access_full_mmu in ptw_translate Date: Sun, 13 Oct 2024 11:47:32 -0700 Message-ID: <20241013184733.1423747-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241013184733.1423747-1-richard.henderson@linaro.org> References: <20241013184733.1423747-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::62a; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62a.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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 The probe_access_full_mmu function was designed for this purpose, and does not report the memory operation event to plugins. Cc: qemu-stable@nongnu.org Fixes: 6d03226b422 ("plugins: force slow path when plugins instrument memory ops") Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Alex Bennée --- target/i386/tcg/sysemu/excp_helper.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/target/i386/tcg/sysemu/excp_helper.c b/target/i386/tcg/sysemu/excp_helper.c index 8fb05b1f53..8f4dc08535 100644 --- a/target/i386/tcg/sysemu/excp_helper.c +++ b/target/i386/tcg/sysemu/excp_helper.c @@ -62,12 +62,11 @@ typedef struct PTETranslate { static bool ptw_translate(PTETranslate *inout, hwaddr addr, uint64_t ra) { - CPUTLBEntryFull *full; int flags; inout->gaddr = addr; - flags = probe_access_full(inout->env, addr, 0, MMU_DATA_STORE, - inout->ptw_idx, true, &inout->haddr, &full, ra); + flags = probe_access_full_mmu(inout->env, addr, 0, MMU_DATA_STORE, + inout->ptw_idx, &inout->haddr, NULL); if (unlikely(flags & TLB_INVALID_MASK)) { TranslateFault *err = inout->err; @@ -429,9 +428,8 @@ do_check_protect_pse36: CPUTLBEntryFull *full; int flags, nested_page_size; - flags = probe_access_full(env, paddr, 0, access_type, - MMU_NESTED_IDX, true, - &pte_trans.haddr, &full, 0); + flags = probe_access_full_mmu(env, paddr, 0, access_type, + MMU_NESTED_IDX, &pte_trans.haddr, &full); if (unlikely(flags & TLB_INVALID_MASK)) { *err = (TranslateFault){ .error_code = env->error_code, From patchwork Sun Oct 13 18:47:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 13833619 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 BDAA6CF2579 for ; Sun, 13 Oct 2024 18:49:03 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t03d0-0001J7-CX; Sun, 13 Oct 2024 14:47:42 -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 1t03cz-0001II-3A for qemu-devel@nongnu.org; Sun, 13 Oct 2024 14:47:41 -0400 Received: from mail-pl1-x62a.google.com ([2607:f8b0:4864:20::62a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1t03cx-0002T3-I9 for qemu-devel@nongnu.org; Sun, 13 Oct 2024 14:47:40 -0400 Received: by mail-pl1-x62a.google.com with SMTP id d9443c01a7336-20c8b557f91so26393585ad.2 for ; Sun, 13 Oct 2024 11:47:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1728845258; x=1729450058; 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=A367cDE3XXnX+J9PB6YWwLbOv7CCrH8XOGA6B2dAonQ=; b=CPdsdk/vadBarphoKLgzZcGC0QcDHf6YHRWApiwV7OORvsuQAMieRWu1Q2NgWGoyZ6 pIKZKKyo5ZGC6nfnbsPAUN+bgESCFZTylQ7XOTR9HA8HgnkYm/F7kMy4+jELz6TOKNAe sEKsNMN/gM3S43NOpBKZxqC3c34s6Q9ONlZf+jQhoxr8HOte9MlphJAqq4OtHk13WVr/ dUvbzh13fiIjv76yGJBlYPUeMUrSkGba4TuhnvP7Vywocl7tOyLrECuZNaQFHHlKnSZ8 yPZjSBIXxwlYle2zVZTEdBuubIV7mn7az3LGce5K3dTPGiYrHRA3kMtQFcrg3SVpVLwl /n3w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728845258; x=1729450058; 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=A367cDE3XXnX+J9PB6YWwLbOv7CCrH8XOGA6B2dAonQ=; b=TDXk39DHLbK7LkH/ImwrdojC1QV/ZvU1r2GtT3Z27/LNlxY+koeQGO+h65T99qPzNv /HKY6ukWVIXPJ+tGKMhzYJeiBZ2InBYqUShQ6G6OelYN90B6gdBptSXjwECWOb0wea51 51Qr8MKI84JiC8pgEW9WEekVATOxevsdC4IZu4LV8/mG8Y+fFD7R3JgFXgCK2PgNX88u YinLeqMESJGNgaX4L9J6FWDy2TBwhiQ1ZO08/LwOe/+p/jGhHZCW/BM8JXqzMd14uJCK X4fvC51L6fppTWKiTvXXL/CvbHibAGaKxIlj7SbfAO2m687Amk79UGRydy6j78+V6vFD A23Q== X-Gm-Message-State: AOJu0Yz55BYnXHOkg0Kv69D+E9UnZB/kTvXkZw4ks93XS+Y0LAOKqtfd 1p7Fh75bMywRWAzoVDHKRf+cc/+zpKRP+bzC2sKKqNGu+HC2h0PmcQMfNoVAEq6Mouw1NUWwzW0 J X-Google-Smtp-Source: AGHT+IGvRfsXpMvrKqM+XTdNzkMe9S1y4G3+HE4CMWfWELYQl37UJe7I3yNOkN7wblaHIpYPU4gJ/Q== X-Received: by 2002:a17:903:11c6:b0:20c:7661:dce8 with SMTP id d9443c01a7336-20ca167d499mr158830245ad.36.1728845258183; Sun, 13 Oct 2024 11:47:38 -0700 (PDT) Received: from stoup.. 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[174.21.81.121]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20c8c35522fsm52811805ad.296.2024.10.13.11.47.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Oct 2024 11:47:37 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Subject: [PATCH v2 3/3] target/i386: Remove ra parameter from ptw_translate Date: Sun, 13 Oct 2024 11:47:33 -0700 Message-ID: <20241013184733.1423747-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241013184733.1423747-1-richard.henderson@linaro.org> References: <20241013184733.1423747-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::62a; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62a.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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 This argument is no longer used. Suggested-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé --- target/i386/tcg/sysemu/excp_helper.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/target/i386/tcg/sysemu/excp_helper.c b/target/i386/tcg/sysemu/excp_helper.c index 8f4dc08535..f97594f4ab 100644 --- a/target/i386/tcg/sysemu/excp_helper.c +++ b/target/i386/tcg/sysemu/excp_helper.c @@ -60,7 +60,7 @@ typedef struct PTETranslate { hwaddr gaddr; } PTETranslate; -static bool ptw_translate(PTETranslate *inout, hwaddr addr, uint64_t ra) +static bool ptw_translate(PTETranslate *inout, hwaddr addr) { int flags; @@ -165,7 +165,7 @@ static bool mmu_translate(CPUX86State *env, const TranslateParams *in, * Page table level 5 */ pte_addr = (in->cr3 & ~0xfff) + (((addr >> 48) & 0x1ff) << 3); - if (!ptw_translate(&pte_trans, pte_addr, ra)) { + if (!ptw_translate(&pte_trans, pte_addr)) { return false; } restart_5: @@ -189,7 +189,7 @@ static bool mmu_translate(CPUX86State *env, const TranslateParams *in, * Page table level 4 */ pte_addr = (pte & PG_ADDRESS_MASK) + (((addr >> 39) & 0x1ff) << 3); - if (!ptw_translate(&pte_trans, pte_addr, ra)) { + if (!ptw_translate(&pte_trans, pte_addr)) { return false; } restart_4: @@ -209,7 +209,7 @@ static bool mmu_translate(CPUX86State *env, const TranslateParams *in, * Page table level 3 */ pte_addr = (pte & PG_ADDRESS_MASK) + (((addr >> 30) & 0x1ff) << 3); - if (!ptw_translate(&pte_trans, pte_addr, ra)) { + if (!ptw_translate(&pte_trans, pte_addr)) { return false; } restart_3_lma: @@ -236,7 +236,7 @@ static bool mmu_translate(CPUX86State *env, const TranslateParams *in, * Page table level 3 */ pte_addr = (in->cr3 & 0xffffffe0ULL) + ((addr >> 27) & 0x18); - if (!ptw_translate(&pte_trans, pte_addr, ra)) { + if (!ptw_translate(&pte_trans, pte_addr)) { return false; } rsvd_mask |= PG_HI_USER_MASK; @@ -258,7 +258,7 @@ static bool mmu_translate(CPUX86State *env, const TranslateParams *in, * Page table level 2 */ pte_addr = (pte & PG_ADDRESS_MASK) + (((addr >> 21) & 0x1ff) << 3); - if (!ptw_translate(&pte_trans, pte_addr, ra)) { + if (!ptw_translate(&pte_trans, pte_addr)) { return false; } restart_2_pae: @@ -284,7 +284,7 @@ static bool mmu_translate(CPUX86State *env, const TranslateParams *in, * Page table level 1 */ pte_addr = (pte & PG_ADDRESS_MASK) + (((addr >> 12) & 0x1ff) << 3); - if (!ptw_translate(&pte_trans, pte_addr, ra)) { + if (!ptw_translate(&pte_trans, pte_addr)) { return false; } pte = ptw_ldq(&pte_trans, ra); @@ -302,7 +302,7 @@ static bool mmu_translate(CPUX86State *env, const TranslateParams *in, * Page table level 2 */ pte_addr = (in->cr3 & 0xfffff000ULL) + ((addr >> 20) & 0xffc); - if (!ptw_translate(&pte_trans, pte_addr, ra)) { + if (!ptw_translate(&pte_trans, pte_addr)) { return false; } restart_2_nopae: @@ -331,7 +331,7 @@ static bool mmu_translate(CPUX86State *env, const TranslateParams *in, * Page table level 1 */ pte_addr = (pte & ~0xfffu) + ((addr >> 10) & 0xffc); - if (!ptw_translate(&pte_trans, pte_addr, ra)) { + if (!ptw_translate(&pte_trans, pte_addr)) { return false; } pte = ptw_ldl(&pte_trans, ra);