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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680019347; 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=6MbnN+0f617dsehwYtlh7IWt8dwxE1cjBMBOmowF/jo=; b=bIz2wdAgqn7NF8vDh0uxunPmXB79SH205WlM7gRk1ie9gepsqlctAohD9L2JvwyoCg ZyKuqbJo+1o+QEqjYt6Hd51WVHk4llvfV9t241+aa0zt7Sj+dM+SorrALkqYEBq0KUAJ W8XX+dvtLR1HbG50kT599TXkrIRD00kSfOrYYQ0H6Pt5ZyAyQX/NvrdwpxNkJElOEEEJ 76jxWIZC7PzYHx/7I4UGjPwPUCI3np2eV0ddZPIj7rtxxuolU6kPH2KG5nQQskqzowsg Vh6nF2WSqhZ0rRbqOHqFzqLHtR0723u77HqKyKmNNUKtizZcqyCLY5mDgMNOQNIr8w9C xHJg== X-Gm-Message-State: AAQBX9fh5YBgPvjp1djw+P4CA9apE6DINPyVen/VszNnY/bgImy7TGg2 8R1t59C9uq3513/aJ2kuo4+e6vT/vRGxz2i1t84= X-Google-Smtp-Source: AKy350ZFQOfZ6NGkv37Y8Zyt4NAfhytXhLygwXOKe3bf5X+CGLXdwq0Za3H95yZDpyNDB1L/YK+wcg== X-Received: by 2002:adf:f4c2:0:b0:2ce:ad40:7705 with SMTP id h2-20020adff4c2000000b002cead407705mr13934370wrp.25.1680019346740; Tue, 28 Mar 2023 09:02:26 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Eduardo Habkost , kvm@vger.kernel.org, qemu-s390x@nongnu.org, Fabiano Rosas , David Hildenbrand , Marcel Apfelbaum , Paolo Bonzini , Greg Kurz , Christian Borntraeger , Thomas Huth , Peter Maydell , Richard Henderson , Ilya Leoshkevich , Halil Pasic , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Daniel Henrique Barboza , David Gibson , Yanan Wang , qemu-ppc@nongnu.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-arm@nongnu.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH-for-8.0 3/3] softmmu: Restore use of CPU watchpoint for all accelerators Date: Tue, 28 Mar 2023 18:02:03 +0200 Message-Id: <20230328160203.13510-4-philmd@linaro.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230328160203.13510-1-philmd@linaro.org> References: <20230328160203.13510-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::42d; envelope-from=philmd@linaro.org; helo=mail-wr1-x42d.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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1680019434086100001 CPU watchpoints can be use by non-TCG accelerators. KVM uses them: $ git grep CPUWatchpoint|fgrep kvm target/arm/kvm64.c:1558: CPUWatchpoint *wp =3D find_hw_watchpoint(= cs, debug_exit->far); target/i386/kvm/kvm.c:5216:static CPUWatchpoint hw_watchpoint; target/ppc/kvm.c:443:static CPUWatchpoint hw_watchpoint; target/s390x/kvm/kvm.c:139:static CPUWatchpoint hw_watchpoint; See for example commit e4482ab7e3 ("target-arm: kvm - add support for HW assisted debug"): This adds basic support for HW assisted debug. The ioctl interface to KVM allows us to pass an implementation defined number of break and watch point registers. [...] This partially reverts commit 2609ec2868e6c286e755a73b4504714a0296a. Fixes: 2609ec2868 ("softmmu: Extract watchpoint API from physmem.c") Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- include/hw/core/cpu.h | 2 +- softmmu/watchpoint.c | 4 ++++ softmmu/meson.build | 2 +- 3 files changed, 6 insertions(+), 2 deletions(-) diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h index ce312745d5..397fd3ac68 100644 --- a/include/hw/core/cpu.h +++ b/include/hw/core/cpu.h @@ -949,7 +949,7 @@ static inline bool cpu_breakpoint_test(CPUState *cpu, v= addr pc, int mask) return false; } =20 -#if !defined(CONFIG_TCG) || defined(CONFIG_USER_ONLY) +#if defined(CONFIG_USER_ONLY) static inline int cpu_watchpoint_insert(CPUState *cpu, vaddr addr, vaddr l= en, int flags, CPUWatchpoint **watchpo= int) { diff --git a/softmmu/watchpoint.c b/softmmu/watchpoint.c index 9d6ae68499..5350163385 100644 --- a/softmmu/watchpoint.c +++ b/softmmu/watchpoint.c @@ -104,6 +104,8 @@ void cpu_watchpoint_remove_all(CPUState *cpu, int mask) } } =20 +#ifdef CONFIG_TCG + /* * Return true if this watchpoint address matches the specified * access (ie the address range covered by the watchpoint overlaps @@ -220,3 +222,5 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, va= ddr len, } } } + +#endif /* CONFIG_TCG */ diff --git a/softmmu/meson.build b/softmmu/meson.build index 0180577517..1a7c7ac089 100644 --- a/softmmu/meson.build +++ b/softmmu/meson.build @@ -5,11 +5,11 @@ specific_ss.add(when: 'CONFIG_SOFTMMU', if_true: [files( 'physmem.c', 'qtest.c', 'dirtylimit.c', + 'watchpoint.c', )]) =20 specific_ss.add(when: ['CONFIG_SOFTMMU', 'CONFIG_TCG'], if_true: [files( 'icount.c', - 'watchpoint.c', )]) =20 softmmu_ss.add(files( --=20 2.38.1