From nobody Tue Feb 10 05:41:10 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1710327342; cv=none; d=zohomail.com; s=zohoarc; b=m0qASl8+g9fTB4Fv0dyv43Lf1KXWeN9weAW9OE4RVMVrjU0z/wqP10wYJ+Pw62l6OqVJyKF0azj+9kZaI53aB5oHQnNQCqzXlEjy6ZEMcN7xtzOi6Bf838RiOIlGcBPruThL7FhHTl2FX5+EPt8rTLs20DxrgxMaUmmop3BakWk= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1710327342; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=5oT1XKXBFQsUGk4QG2qYw4iHv7mWal+0jdHBO1XvE/8=; b=QS216yV7f20wkYigPq5g5Cn/HrnF09TZ5dUX1F89fUjKko6fCh0/RkgNYuTcxspzapbgvvJj9gWZmMwgoF9WwKelZlxdReDrqnNx/ugylsGBh573LUlFAvjrcsKx4H6Jk0CwXTOiufgh1flrRUpfO2ED0jGhg6CoC4fZKus2bs8= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1710327342471692.6614475083984; Wed, 13 Mar 2024 03:55:42 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rkMGj-0005CC-Js; Wed, 13 Mar 2024 06:55:33 -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 1rkMGb-00059F-VU for qemu-devel@nongnu.org; Wed, 13 Mar 2024 06:55:26 -0400 Received: from mail-lf1-x12c.google.com ([2a00:1450:4864:20::12c]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1rkMGa-000796-20 for qemu-devel@nongnu.org; Wed, 13 Mar 2024 06:55:25 -0400 Received: by mail-lf1-x12c.google.com with SMTP id 2adb3069b0e04-513c847c24dso610598e87.1 for ; Wed, 13 Mar 2024 03:55:22 -0700 (PDT) Received: from linaro.. ([102.35.208.160]) by smtp.gmail.com with ESMTPSA id w17-20020adfee51000000b0033e1be7f3d8sm11390338wro.70.2024.03.13.03.55.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Mar 2024 03:55:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1710327321; x=1710932121; 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=5oT1XKXBFQsUGk4QG2qYw4iHv7mWal+0jdHBO1XvE/8=; b=VpaSVLkaOmbmm7LsPaZYn6MVTvDU1Mv73nm/9clRz68mIAeuy8Jm/Jjjw7Wydilsl+ KtrOeQN1uu6POuT6fOzXxE0LlqsatV9kZkMhk84U/Dq3oy7dHqAy6NCcmw2Ynxynsa/S MQZYTCcG8YVzIcXweCm10bqmvcCYRCPfdH06yA25HQzudCpc6c7KmhnCHb4hfeFmnhdJ vMHfZyJny2ZhVM+9aQCkck26uxsx839ekEKjasHRCdNX6IcyQOFSD2abqPMrW9KV3Zh3 7bUuOlh+9U46KsBdc/xMTFD+cfqur6qRLxb9np4XI6fy5rg0HBcMEuaIqYLRNunR/keb kJ6w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710327321; x=1710932121; 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=5oT1XKXBFQsUGk4QG2qYw4iHv7mWal+0jdHBO1XvE/8=; b=Sf07XxGJwMadPgFfTCdRoba5NI4fS0tQBhdc7xtdbwbD9HmzJLoMXFiuZXbYgHXD+M +5cB4mLN1Cxpbczt8aKF7M/T1O55t0kwUTbbPUdYokODXe+0er1TY9DQyoV5onfMUI/O xPNnXjqHq8+P6EULB0G187+g5mCbLHNul03EkEBmtjLUDqKAKieD7DDq114nSVAZfhfk HtiwLgyT4cDIdA4aSncwn58Ct3dGOy9BVBC8kWG2ARs9+a5izBVXK/jIGh7W6qQbSFCw mvM0JsAT2X0VZQhiIEnci887yJaQmnn4TE/ebp+Ipg8G2MxA8wPLPOobzPNW5rmJbkUx lvIA== X-Gm-Message-State: AOJu0Yxp86il+o8JrJP11z1He3kFEGX2CvpBe9AYSfztKEVTVotZC/ae n6FXPAJCZcww2DiHZGPbjfnVABbUyUbQ8ZrWm0gOOXjpWgQoa4KLfo1gOrERaADWgDSY1tkBF7p n4Gs= X-Google-Smtp-Source: AGHT+IGW8eag6E9K9MiCk7cY3Xd6Y4/xgoeq/RbYeXS/vtpaOMAGxd9pJ+BXuW9w+qR9GQQQuEK3Fg== X-Received: by 2002:ac2:4c42:0:b0:513:2004:43e4 with SMTP id o2-20020ac24c42000000b00513200443e4mr4071069lfk.36.1710327321112; Wed, 13 Mar 2024 03:55:21 -0700 (PDT) From: Pierrick Bouvier To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Alexandre Iooss , Richard Henderson , Laurent Vivier , Thomas Huth , Pierrick Bouvier , Mahmoud Mandour , =?UTF-8?q?Alex=20Benn=C3=A9e?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [RFC PATCH 1/5] sysemu: add set_virtual_time to accel ops Date: Wed, 13 Mar 2024 14:55:00 +0400 Message-Id: <20240313105504.341875-2-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240313105504.341875-1-pierrick.bouvier@linaro.org> References: <20240313105504.341875-1-pierrick.bouvier@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::12c; envelope-from=pierrick.bouvier@linaro.org; helo=mail-lf1-x12c.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, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1710327344447100003 From: Alex Benn=C3=A9e We are about to remove direct calls to individual accelerators for this information and will need a central point for plugins to hook into time changes. Signed-off-by: Alex Benn=C3=A9e Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- include/sysemu/accel-ops.h | 18 +++++++++++++++++- include/sysemu/cpu-timers.h | 3 ++- ...et-virtual-clock.c =3D> cpus-virtual-clock.c} | 5 +++++ system/cpus.c | 11 +++++++++++ stubs/meson.build | 2 +- 5 files changed, 36 insertions(+), 3 deletions(-) rename stubs/{cpus-get-virtual-clock.c =3D> cpus-virtual-clock.c} (68%) diff --git a/include/sysemu/accel-ops.h b/include/sysemu/accel-ops.h index ef91fc28bbd..a0886722305 100644 --- a/include/sysemu/accel-ops.h +++ b/include/sysemu/accel-ops.h @@ -20,7 +20,12 @@ typedef struct AccelOpsClass AccelOpsClass; DECLARE_CLASS_CHECKERS(AccelOpsClass, ACCEL_OPS, TYPE_ACCEL_OPS) =20 -/* cpus.c operations interface */ +/** + * struct AccelOpsClass - accelerator interfaces + * + * This structure is used to abstract accelerator differences from the + * core CPU code. Not all have to be implemented. + */ struct AccelOpsClass { /*< private >*/ ObjectClass parent_class; @@ -44,7 +49,18 @@ struct AccelOpsClass { =20 void (*handle_interrupt)(CPUState *cpu, int mask); =20 + /** + * @get_virtual_clock: fetch virtual clock + * @set_virtual_clock: set virtual clock + * + * These allow the timer subsystem to defer to the accelerator to + * fetch time. The set function is needed if the accelerator wants + * to track the changes to time as the timer is warped through + * various timer events. + */ int64_t (*get_virtual_clock)(void); + void (*set_virtual_clock)(int64_t time); + int64_t (*get_elapsed_ticks)(void); =20 /* gdbstub hooks */ diff --git a/include/sysemu/cpu-timers.h b/include/sysemu/cpu-timers.h index d86738a378d..7bfa960fbd6 100644 --- a/include/sysemu/cpu-timers.h +++ b/include/sysemu/cpu-timers.h @@ -96,8 +96,9 @@ int64_t cpu_get_clock(void); =20 void qemu_timer_notify_cb(void *opaque, QEMUClockType type); =20 -/* get the VIRTUAL clock and VM elapsed ticks via the cpus accel interface= */ +/* get/set VIRTUAL clock and VM elapsed ticks via the cpus accel interface= */ int64_t cpus_get_virtual_clock(void); +void cpus_set_virtual_clock(int64_t new_time); int64_t cpus_get_elapsed_ticks(void); =20 #endif /* SYSEMU_CPU_TIMERS_H */ diff --git a/stubs/cpus-get-virtual-clock.c b/stubs/cpus-virtual-clock.c similarity index 68% rename from stubs/cpus-get-virtual-clock.c rename to stubs/cpus-virtual-clock.c index fd447d53f3c..af7c1a1d403 100644 --- a/stubs/cpus-get-virtual-clock.c +++ b/stubs/cpus-virtual-clock.c @@ -6,3 +6,8 @@ int64_t cpus_get_virtual_clock(void) { return cpu_get_clock(); } + +void cpus_set_virtual_clock(int64_t new_time) +{ + /* do nothing */ +} diff --git a/system/cpus.c b/system/cpus.c index 68d161d96b7..03ba026667c 100644 --- a/system/cpus.c +++ b/system/cpus.c @@ -229,6 +229,17 @@ int64_t cpus_get_virtual_clock(void) return cpu_get_clock(); } =20 +/* + * Signal the new virtual time to the accelerator. This is only needed + * by accelerators that need to track the changes as we warp time. + */ +void cpus_set_virtual_clock(int64_t new_time) +{ + if (cpus_accel && cpus_accel->set_virtual_clock) { + cpus_accel->set_virtual_clock(new_time); + } +} + /* * return the time elapsed in VM between vm_start and vm_stop. Unless * icount is active, cpus_get_elapsed_ticks() uses units of the host CPU c= ycle diff --git a/stubs/meson.build b/stubs/meson.build index 0bf25e6ca53..1a7957352b1 100644 --- a/stubs/meson.build +++ b/stubs/meson.build @@ -5,7 +5,7 @@ stub_ss.add(files('blockdev-close-all-bdrv-states.c')) stub_ss.add(files('change-state-handler.c')) stub_ss.add(files('cmos.c')) stub_ss.add(files('cpu-get-clock.c')) -stub_ss.add(files('cpus-get-virtual-clock.c')) +stub_ss.add(files('cpus-virtual-clock.c')) stub_ss.add(files('qemu-timer-notify-cb.c')) stub_ss.add(files('icount.c')) stub_ss.add(files('dump.c')) --=20 2.39.2