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([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) 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_Benn=C3=A9e?= , =?utf-8?q?Philippe_M?= =?utf-8?q?athieu-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 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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org From: Alex Bennée 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 Bennée Reviewed-by: Philippe Mathieu-Daudé --- include/sysemu/accel-ops.h | 18 +++++++++++++++++- include/sysemu/cpu-timers.h | 3 ++- ...et-virtual-clock.c => 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 => 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) -/* 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 { void (*handle_interrupt)(CPUState *cpu, int mask); + /** + * @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); /* 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); void qemu_timer_notify_cb(void *opaque, QEMUClockType type); -/* 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); #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(); } +/* + * 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 cycle 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')) From patchwork Wed Mar 13 10:55:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Pierrick Bouvier X-Patchwork-Id: 780026 Delivered-To: patch@linaro.org Received: by 2002:adf:f741:0:b0:33e:7753:30bd with SMTP id z1csp112577wrp; Wed, 13 Mar 2024 03:56:18 -0700 (PDT) X-Forwarded-Encrypted: i=2; AJvYcCXUndYHQV3v9fVJQZuuPwKJmRAcqfxWh7KHiqGvk6RPNcMhJfzvNi/jXORSp7kMmcJjrK06ou0M86iEe6UzAWoN X-Google-Smtp-Source: AGHT+IEXzcFLJ6erxApeazFZEmsWJ1fIKpFpiNDjIoHyuSLW2rcwLC2IOfr7VV2ndTLQWqsNvpAp X-Received: by 2002:ac8:5f53:0:b0:42f:208b:cb0d with SMTP id y19-20020ac85f53000000b0042f208bcb0dmr15815030qta.50.1710327378269; Wed, 13 Mar 2024 03:56:18 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1710327378; cv=none; d=google.com; s=arc-20160816; b=iPTnm07+TPG4typXfc6D5WSEs5XcfhuUCXVaLdHVp5+aDY/cCR/9GVbe0xLnCvmm78 HDBaa8FgnDQEC45FbpcvztKYwgXu5L8O272pSKu5DKuh4sB8NMd+Mbgsnd87qIEg320S Y56DEBLZ7SrQrmpJH2X3l1RC4mdM+XCgLCa9hixz90qggU+do+/i2j2Wlb7Rna1aHMhJ Rqf39OLhd0dXzEZtdLbT+cKiGE640k7Im+17OjYMtazQYLHB69WUAzkTXhjF45sqJGWy zTHA1AS6X4EqN0KuXH1IKQcSXtByVrY1jU9XQ2P776elbfftapVYmqxHKcvnIJRqa5lE /Dyw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=2A4y2sEoIfQRif0BIyFTxg0vj8eN3cypCY900sTp17U=; fh=SOx5jGRISimNYto+GAJnnbqozdA4y+bYXtSuueN6vdQ=; b=uY9/jRkRRkMLvKVKYvtjwshzxcpWCMF9mLWvxV66SKKroqpqvjZj8j23fngPypaA5U PI0ofPUh8yqmJ1k+dFroLKsNUGGXsUuTG/bpH1QnIQ5kxDQ8QNoIqhqz2uUcRR4+2hOS qsI1gxUjlORghTiOyxmTC8/8e0sJIoBojHB3dqBQ5esc8J0c1Ett43f80+1qch0InRVd Oj8KJJGuYNyAYGmm/tJgYB+f9O71uRpgJC6p7GVRQhtv+CE0Q/HmycJKVTIx4UZyMHGy JAeCi6JinA/Mm9sgQkhDZGoEZFODSSLcIgAFNw0iVXSfHLnw529mt0h8r7HgZA4+xkoT SLcQ==; dara=google.com ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=HTXeTRGS; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. 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([102.35.208.160]) by smtp.gmail.com with ESMTPSA id w17-20020adfee51000000b0033e1be7f3d8sm11390338wro.70.2024.03.13.03.55.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Mar 2024 03:55:24 -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_Benn=C3=A9e?= Subject: [RFC PATCH 2/5] qtest: use cpu interface in qtest_clock_warp Date: Wed, 13 Mar 2024 14:55:01 +0400 Message-Id: <20240313105504.341875-3-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 Received-SPF: pass client-ip=2a00:1450:4864:20::32a; envelope-from=pierrick.bouvier@linaro.org; helo=mail-wm1-x32a.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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org From: Alex Bennée This generalises the qtest_clock_warp code to use the AccelOps handlers for updating its own sense of time. This will make the next patch which moves the warp code closer to pure code motion. Signed-off-by: Alex Bennée Acked-by: Thomas Huth --- include/sysemu/qtest.h | 1 + accel/qtest/qtest.c | 1 + system/qtest.c | 6 +++--- 3 files changed, 5 insertions(+), 3 deletions(-) diff --git a/include/sysemu/qtest.h b/include/sysemu/qtest.h index b5d5fd34637..45f3b7e1df5 100644 --- a/include/sysemu/qtest.h +++ b/include/sysemu/qtest.h @@ -36,6 +36,7 @@ void qtest_server_set_send_handler(void (*send)(void *, const char *), void qtest_server_inproc_recv(void *opaque, const char *buf); int64_t qtest_get_virtual_clock(void); +void qtest_set_virtual_clock(int64_t count); #endif #endif diff --git a/accel/qtest/qtest.c b/accel/qtest/qtest.c index f6056ac8361..53182e6c2ae 100644 --- a/accel/qtest/qtest.c +++ b/accel/qtest/qtest.c @@ -52,6 +52,7 @@ static void qtest_accel_ops_class_init(ObjectClass *oc, void *data) ops->create_vcpu_thread = dummy_start_vcpu_thread; ops->get_virtual_clock = qtest_get_virtual_clock; + ops->set_virtual_clock = qtest_set_virtual_clock; }; static const TypeInfo qtest_accel_ops_type = { diff --git a/system/qtest.c b/system/qtest.c index 6da58b3874e..ee8b139e982 100644 --- a/system/qtest.c +++ b/system/qtest.c @@ -332,14 +332,14 @@ int64_t qtest_get_virtual_clock(void) return qatomic_read_i64(&qtest_clock_counter); } -static void qtest_set_virtual_clock(int64_t count) +void qtest_set_virtual_clock(int64_t count) { qatomic_set_i64(&qtest_clock_counter, count); } static void qtest_clock_warp(int64_t dest) { - int64_t clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + int64_t clock = cpus_get_virtual_clock(); AioContext *aio_context; assert(qtest_enabled()); aio_context = qemu_get_aio_context(); @@ -348,7 +348,7 @@ static void qtest_clock_warp(int64_t dest) QEMU_TIMER_ATTR_ALL); int64_t warp = qemu_soonest_timeout(dest - clock, deadline); - qtest_set_virtual_clock(qtest_get_virtual_clock() + warp); + cpus_set_virtual_clock(cpus_get_virtual_clock() + warp); qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL); timerlist_run_timers(aio_context->tlg.tl[QEMU_CLOCK_VIRTUAL]); From patchwork Wed Mar 13 10:55:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Pierrick Bouvier X-Patchwork-Id: 780027 Delivered-To: patch@linaro.org Received: by 2002:adf:f741:0:b0:33e:7753:30bd with SMTP id z1csp112629wrp; Wed, 13 Mar 2024 03:56:29 -0700 (PDT) X-Forwarded-Encrypted: i=2; AJvYcCWZLkla1HVuo34rPXtPysjTxBXYvhkORp9PARO2R0zSF4G/UcqNXjmX/0OGLtPq/7oO+1f6lSbtx+KZuVUxskI+ X-Google-Smtp-Source: AGHT+IGvppUvqNrDpUaaNynRxwDd4quaJP9NPC0NQgWLpYmGR9RV2zI80aRpZACPPLJ3m2G0AP/r X-Received: by 2002:a05:6808:1187:b0:3c1:c124:6d4d with SMTP id j7-20020a056808118700b003c1c1246d4dmr4592451oil.56.1710327389024; Wed, 13 Mar 2024 03:56:29 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1710327388; cv=none; d=google.com; s=arc-20160816; b=Fhf5RyJBXQx7hqE90rlDldf3ztRKbD8YYEEFU/KBHVVN0FuaqvpUkFFqmNY14uZ3/a LJwGa4be9hT2k/odFh8fCPKl0Pfdkv6+OLE4C8miIGvo1oJMW2O6rtPzW8Fd2Uyx21c5 JwjHShtDRoUBoxFPSid3XMzef/N5GqRBGf/dYYD0S3fUSCJokzf6VfKbBgG+2BvmV1wV TkITveEqaju8hABvh7oSjbsJi+uScVVv6KCEZ4CMUHyCwpaJ/+gsgX0EG2EK/6WrsMZg RlZZcT1IHN5f6LN9OSlTTMlWRGl2GqAA9AV5rYXoFnh/aIv+a6KtMU3WNQIOFttgAky0 8XcA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=o6QDwYzo62XZFD/GhIgkJ+Hn9SLx+3ew7YSnia2dKPw=; fh=SOx5jGRISimNYto+GAJnnbqozdA4y+bYXtSuueN6vdQ=; b=uBJ2g+LpO20kand5B/cHmRv+G8xG3ptcXaBz9eIvraBXWQFHVVtHp7Wn4nD3l5I9kH vPVzHrmTwfR5zaiFaU+HUOxOcWlgX+L9hSPJaC2BSV77UsfmSwhm8Gg98BdS/aa2fekO Zzh2KgdSWVYjuBctiQg047woX0la7Ref8kDTQh6vtFINAtYyHWixOm0IxR9m6kv+ozwI yvRDkk+y8eFsvLHtZSgJ0t9a0fLMjc6NM+n7e+ts5X84HJMSA8BvKsL2YevFc1NwFvMG 0NrOHayfiOwvHUzEZQ3NOIs4PiSbAeXs/O1NjfCoWPyWJhp73XpXZTKe9MxGASdbw8hX aV1Q==; dara=google.com ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=KbZcYWxH; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. 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([102.35.208.160]) by smtp.gmail.com with ESMTPSA id w17-20020adfee51000000b0033e1be7f3d8sm11390338wro.70.2024.03.13.03.55.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Mar 2024 03:55:27 -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_Benn=C3=A9e?= Subject: [RFC PATCH 3/5] sysemu: generalise qtest_warp_clock as qemu_clock_advance_virtual_time Date: Wed, 13 Mar 2024 14:55:02 +0400 Message-Id: <20240313105504.341875-4-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 Received-SPF: pass client-ip=2a00:1450:4864:20::436; envelope-from=pierrick.bouvier@linaro.org; helo=mail-wr1-x436.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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org From: Alex Bennée Move the key functionality of moving time forward into the clock sub-system itself. This will allow us to plumb in time control into plugins. Signed-off-by: Alex Bennée --- include/qemu/timer.h | 15 +++++++++++++++ system/qtest.c | 25 +++---------------------- util/qemu-timer.c | 26 ++++++++++++++++++++++++++ 3 files changed, 44 insertions(+), 22 deletions(-) diff --git a/include/qemu/timer.h b/include/qemu/timer.h index 9a366e551fb..910587d8293 100644 --- a/include/qemu/timer.h +++ b/include/qemu/timer.h @@ -245,6 +245,21 @@ bool qemu_clock_run_timers(QEMUClockType type); */ bool qemu_clock_run_all_timers(void); +/** + * qemu_clock_advance_virtual_time(): advance the virtual time tick + * @target: target time in nanoseconds + * + * This function is used where the control of the flow of time has + * been delegated to outside the clock subsystem (be it qtest, icount + * or some other external source). You can ask the clock system to + * return @early at the first expired timer. + * + * Time can only move forward, attempts to reverse time would lead to + * an error. + * + * Returns: new virtual time. + */ +int64_t qemu_clock_advance_virtual_time(int64_t dest); /* * QEMUTimerList diff --git a/system/qtest.c b/system/qtest.c index ee8b139e982..e6f6b4e62d5 100644 --- a/system/qtest.c +++ b/system/qtest.c @@ -337,26 +337,6 @@ void qtest_set_virtual_clock(int64_t count) qatomic_set_i64(&qtest_clock_counter, count); } -static void qtest_clock_warp(int64_t dest) -{ - int64_t clock = cpus_get_virtual_clock(); - AioContext *aio_context; - assert(qtest_enabled()); - aio_context = qemu_get_aio_context(); - while (clock < dest) { - int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL, - QEMU_TIMER_ATTR_ALL); - int64_t warp = qemu_soonest_timeout(dest - clock, deadline); - - cpus_set_virtual_clock(cpus_get_virtual_clock() + warp); - - qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL); - timerlist_run_timers(aio_context->tlg.tl[QEMU_CLOCK_VIRTUAL]); - clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); - } - qemu_clock_notify(QEMU_CLOCK_VIRTUAL); -} - static bool (*process_command_cb)(CharBackend *chr, gchar **words); void qtest_set_command_cb(bool (*pc_cb)(CharBackend *chr, gchar **words)) @@ -755,7 +735,8 @@ static void qtest_process_command(CharBackend *chr, gchar **words) ns = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL, QEMU_TIMER_ATTR_ALL); } - qtest_clock_warp(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + ns); + qemu_clock_advance_virtual_time( + qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + ns); qtest_send_prefix(chr); qtest_sendf(chr, "OK %"PRIi64"\n", (int64_t)qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); @@ -781,7 +762,7 @@ static void qtest_process_command(CharBackend *chr, gchar **words) g_assert(words[1]); ret = qemu_strtoi64(words[1], NULL, 0, &ns); g_assert(ret == 0); - qtest_clock_warp(ns); + qemu_clock_advance_virtual_time(ns); qtest_send_prefix(chr); qtest_sendf(chr, "OK %"PRIi64"\n", (int64_t)qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); diff --git a/util/qemu-timer.c b/util/qemu-timer.c index 6a0de33dd2b..213114be68c 100644 --- a/util/qemu-timer.c +++ b/util/qemu-timer.c @@ -645,6 +645,11 @@ int64_t qemu_clock_get_ns(QEMUClockType type) } } +static void qemu_virtual_clock_set_ns(int64_t time) +{ + return cpus_set_virtual_clock(time); +} + void init_clocks(QEMUTimerListNotifyCB *notify_cb) { QEMUClockType type; @@ -675,3 +680,24 @@ bool qemu_clock_run_all_timers(void) return progress; } + +int64_t qemu_clock_advance_virtual_time(int64_t dest) +{ + int64_t clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + AioContext *aio_context; + aio_context = qemu_get_aio_context(); + while (clock < dest) { + int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL, + QEMU_TIMER_ATTR_ALL); + int64_t warp = qemu_soonest_timeout(dest - clock, deadline); + + qemu_virtual_clock_set_ns(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + warp); + + qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL); + timerlist_run_timers(aio_context->tlg.tl[QEMU_CLOCK_VIRTUAL]); + clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + } + qemu_clock_notify(QEMU_CLOCK_VIRTUAL); + + return clock; +} From patchwork Wed Mar 13 10:55:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Pierrick Bouvier X-Patchwork-Id: 780028 Delivered-To: patch@linaro.org Received: by 2002:adf:f741:0:b0:33e:7753:30bd with SMTP id z1csp112684wrp; Wed, 13 Mar 2024 03:56:37 -0700 (PDT) X-Forwarded-Encrypted: i=2; AJvYcCVOfdpvPs1pseyeTpQ/DFUxv11qOnFOg1CYWWOdFgY4bIIuNk6A7KiK+3F7YiaVpExCe3bUiCzzUYYc7xmqIsMl X-Google-Smtp-Source: AGHT+IGfUx637BCeU0X49xTmUYLnP9XDd3tR/pQ4XkfILs06U1U5K0DfnZnjMTOviqLCsnufCUVn X-Received: by 2002:a5b:b4b:0:b0:dcd:b624:3e55 with SMTP id b11-20020a5b0b4b000000b00dcdb6243e55mr1984676ybr.54.1710327397565; Wed, 13 Mar 2024 03:56:37 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1710327397; cv=none; d=google.com; s=arc-20160816; b=0O/14Uj8qzrWSIAfnKCGSfYEZ5XoatrmnKA0dmDUdQuWvpK5A2H+RvgTgkyceMjPpu BR+HzCR2r2yhN2B2G9sxe368yVYBd8OH7qe7gmTn0PvjqzIZNVX2api4MHB3nQ9KWMIw K04nv30qFLR1KHoAs4Tg/URK7LWDvL8cnADpCboUAjmXDPLs+MjRd4SW//pwxL+4LPU5 oLGV2lpqwoIzC46aHlLRJXeyBdoUGauzbrZYi06WK6ZXncI9ds5aH9d9QxHQjbwmCcrd OZms9a54NnEk8ARBbymxMJ4Z4hATD5C3z6086joa08DgjsZ1c73PD8fPBGIxDTEge74K gwvA== ARC-Message-Signature: i=1; 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([102.35.208.160]) by smtp.gmail.com with ESMTPSA id w17-20020adfee51000000b0033e1be7f3d8sm11390338wro.70.2024.03.13.03.55.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Mar 2024 03:55:30 -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_Benn=C3=A9e?= Subject: [RFC PATCH 4/5] plugins: add time control API Date: Wed, 13 Mar 2024 14:55:03 +0400 Message-Id: <20240313105504.341875-5-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 Received-SPF: pass client-ip=2a00:1450:4864:20::434; envelope-from=pierrick.bouvier@linaro.org; helo=mail-wr1-x434.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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org From: Alex Bennée Expose the ability to control time through the plugin API. Only one plugin can control time so it has to request control when loaded. There are probably more corner cases to catch here. Signed-off-by: Alex Bennée --- include/qemu/qemu-plugin.h | 23 +++++++++++++++++++++++ plugins/api.c | 31 +++++++++++++++++++++++++++++++ plugins/qemu-plugins.symbols | 2 ++ 3 files changed, 56 insertions(+) diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h index 337de25ece7..f2a0253e594 100644 --- a/include/qemu/qemu-plugin.h +++ b/include/qemu/qemu-plugin.h @@ -662,6 +662,29 @@ void qemu_plugin_register_vcpu_mem_inline_per_vcpu( qemu_plugin_u64 entry, uint64_t imm); +/** + * qemu_plugin_request_time_control() - request the ability to control time + * + * This grants the plugin the ability to control system time. Only one + * plugin can control time so if multiple plugins request the ability + * all but the first will fail. + * + * Returns an opaque handle or NULL if fails + */ +const void *qemu_plugin_request_time_control(void); + +/** + * qemu_plugin_update_ns() - update system emulation time + * @handle: opaque handle returned by qemu_plugin_request_time_control() + * @time: time in nanoseconds + * + * This allows an appropriately authorised plugin (i.e. holding the + * time control handle) to move system time forward to @time. + * + * Start time is 0. + */ +void qemu_plugin_update_ns(const void *handle, int64_t time); + typedef void (*qemu_plugin_vcpu_syscall_cb_t)(qemu_plugin_id_t id, unsigned int vcpu_index, int64_t num, uint64_t a1, uint64_t a2, diff --git a/plugins/api.c b/plugins/api.c index fdf6167655e..f8b2d09ad0c 100644 --- a/plugins/api.c +++ b/plugins/api.c @@ -39,6 +39,7 @@ #include "qemu/main-loop.h" #include "qemu/plugin.h" #include "qemu/log.h" +#include "qemu/timer.h" #include "tcg/tcg.h" #include "exec/exec-all.h" #include "exec/gdbstub.h" @@ -591,3 +592,33 @@ uint64_t qemu_plugin_u64_sum(qemu_plugin_u64 entry) } return total; } + +/* + * Time control + */ +static bool has_control; + +const void *qemu_plugin_request_time_control(void) +{ + if (!has_control) { + has_control = true; + return &has_control; + } + return NULL; +} + +static void advance_virtual_time__async(CPUState *cpu, run_on_cpu_data data) +{ + int64_t new_time = data.host_ulong; + qemu_clock_advance_virtual_time(new_time); +} + +void qemu_plugin_update_ns(const void *handle, int64_t new_time) +{ + if (handle == &has_control) { + /* Need to execute out of cpu_exec, so bql can be locked. */ + async_run_on_cpu(current_cpu, + advance_virtual_time__async, + RUN_ON_CPU_HOST_ULONG(new_time)); + } +} diff --git a/plugins/qemu-plugins.symbols b/plugins/qemu-plugins.symbols index aa0a77a319f..ca773d8d9fe 100644 --- a/plugins/qemu-plugins.symbols +++ b/plugins/qemu-plugins.symbols @@ -38,6 +38,7 @@ qemu_plugin_register_vcpu_tb_exec_cond_cb; qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu; qemu_plugin_register_vcpu_tb_trans_cb; + qemu_plugin_request_time_control; qemu_plugin_reset; qemu_plugin_scoreboard_free; qemu_plugin_scoreboard_find; @@ -51,5 +52,6 @@ qemu_plugin_u64_set; qemu_plugin_u64_sum; qemu_plugin_uninstall; + qemu_plugin_update_ns; qemu_plugin_vcpu_for_each; }; From patchwork Wed Mar 13 10:55:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierrick Bouvier X-Patchwork-Id: 780029 Delivered-To: patch@linaro.org Received: by 2002:adf:f741:0:b0:33e:7753:30bd with SMTP id z1csp112715wrp; Wed, 13 Mar 2024 03:56:43 -0700 (PDT) X-Forwarded-Encrypted: i=2; AJvYcCWSuik5FeH3ToAKhGTIlI67qZfMtCCVIxnU4l3/OSpoIA/XrnrRT/eN7KBduI5jPmxeCfTOuTkkeIOXsZQojdde X-Google-Smtp-Source: AGHT+IEaNt38r75k1gYGabmkW+Irf1tYVabdIsbrJOObYc+Mh02BitGwU3nAzY014Mgp5ppflEZl X-Received: by 2002:ac8:5f93:0:b0:42e:f3ba:9998 with SMTP id j19-20020ac85f93000000b0042ef3ba9998mr3770319qta.39.1710327402917; Wed, 13 Mar 2024 03:56:42 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1710327402; cv=none; d=google.com; s=arc-20160816; b=OXG0Au1bQeUmlsM3rEDGIkn9Ad7UtWtN2H1kCV+ELhoVFourw/3KyI1cOU7VoYV1PX rsNjS4eXqfB6GzoFOmDMdlV7KxlU+61AhK4hiorPpLKIQS1ECEM9kVatUxO/sXV0DMp3 Efv3xK20/3d6KkVjtK94NaqHmcTcgZfNkuJAJ8+/RtdlPFUpYpXw8Lz7lYGtck4OTpWn sH15nQ79fjhSV2mHSbG5lYnlDUFPlm7RamDhkmZjtNinr5PkO0TxmEuYV0s2/OiYlX2o l+bFzhkhYUKOAottjT0dQFMS/cn4c5gGEkI8oYcgQE2OJ+p4dx/MLQ2z3XyP3L7l/D1T mgQg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=hpyBaozCQ+jLuJlITaCU3JbnujRlJ74PNyfyU9cltA0=; fh=SOx5jGRISimNYto+GAJnnbqozdA4y+bYXtSuueN6vdQ=; b=V3STYBtPp0XUfKAEknZrT/jq6FJNR7RXESBteFtXxTF5Km+galau4i//c8lb3IDSvg MQCsMHw53gmvyv2MazfmQGRY2RqF5KL3fO+7VmcEDxR2TA81ijfYkWuymVp4VdvSZVdJ 9xcy5YmuxoUPwAfAhRVy4kJc5hVjzTGtmo7LowlHkbrFGz7z7yo1GEjpjMkftxLM8OJa 7E70/HkhBY9FclXO8f3q4ffX3gf+0fT336FPAZrdZ4Dt0hlEpTGzZJpW5SD3MRZvtdas hh3Rfh8djfofcwrl1MuHyriBTI6g2FFHGxhyxpRRTUnEPEsiBnBGanm/aLhGRmPDEPDo gLag==; dara=google.com ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=Top6NOHW; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. 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([102.35.208.160]) by smtp.gmail.com with ESMTPSA id w17-20020adfee51000000b0033e1be7f3d8sm11390338wro.70.2024.03.13.03.55.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Mar 2024 03:55:33 -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_Benn=C3=A9e?= Subject: [RFC PATCH 5/5] contrib/plugins: add ips plugin example for cost modelling Date: Wed, 13 Mar 2024 14:55:04 +0400 Message-Id: <20240313105504.341875-6-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 Received-SPF: pass client-ip=2a00:1450:4864:20::129; envelope-from=pierrick.bouvier@linaro.org; helo=mail-lf1-x129.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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org This plugin uses the new time control interface to make decisions about the state of time during the emulation. The algorithm is currently very simple. The user specifies an ips rate which applies per core. If the core runs ahead of its allocated execution time the plugin sleeps for a bit to let real time catch up. Either way time is updated for the emulation as a function of total executed instructions with some adjustments for cores that idle. Signed-off-by: Pierrick Bouvier --- contrib/plugins/ips.c | 239 +++++++++++++++++++++++++++++++++++++++ contrib/plugins/Makefile | 1 + 2 files changed, 240 insertions(+) create mode 100644 contrib/plugins/ips.c diff --git a/contrib/plugins/ips.c b/contrib/plugins/ips.c new file mode 100644 index 00000000000..cf3159df391 --- /dev/null +++ b/contrib/plugins/ips.c @@ -0,0 +1,239 @@ +/* + * ips rate limiting plugin. + * + * This plugin can be used to restrict the execution of a system to a + * particular number of Instructions Per Second (ips). This controls + * time as seen by the guest so while wall-clock time may be longer + * from the guests point of view time will pass at the normal rate. + * + * This uses the new plugin API which allows the plugin to control + * system time. + * + * Copyright (c) 2023 Linaro Ltd + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include +#include +#include + +QEMU_PLUGIN_EXPORT int qemu_plugin_version = QEMU_PLUGIN_VERSION; + +/* how many times do we update time per sec */ +#define NUM_TIME_UPDATE_PER_SEC 10 +#define NSEC_IN_ONE_SEC (1000 * 1000 * 1000) + +static GMutex global_state_lock; + +static uint64_t insn_per_second = 1000 * 1000; /* ips per core, per second */ +static uint64_t insn_quantum; /* trap every N instructions */ +static bool precise_execution; /* count every instruction */ +static int64_t start_time_ns; /* time (ns since epoch) first vCPU started */ +static int64_t virtual_time_ns; /* last set virtual time */ + +static const void *time_handle; + +typedef enum { + UNKNOWN = 0, + EXECUTING, + IDLE, + FINISHED +} vCPUState; + +typedef struct { + uint64_t counter; + uint64_t track_insn; + vCPUState state; + /* timestamp when vCPU entered state */ + int64_t last_state_time; +} vCPUTime; + +struct qemu_plugin_scoreboard *vcpus; + +/* return epoch time in ns */ +static int64_t now_ns(void) +{ + return g_get_real_time() * 1000; +} + +static uint64_t num_insn_during(int64_t elapsed_ns) +{ + double num_secs = elapsed_ns / (double) NSEC_IN_ONE_SEC; + return num_secs * (double) insn_per_second; +} + +static int64_t time_for_insn(uint64_t num_insn) +{ + double num_secs = (double) num_insn / (double) insn_per_second; + return num_secs * (double) NSEC_IN_ONE_SEC; +} + +static int64_t uptime_ns(void) +{ + int64_t now = now_ns(); + g_assert(now >= start_time_ns); + return now - start_time_ns; +} + +static void vcpu_set_state(vCPUTime *vcpu, vCPUState new_state) +{ + vcpu->last_state_time = now_ns(); + vcpu->state = new_state; +} + +static void update_system_time(vCPUTime *vcpu) +{ + /* flush remaining instructions */ + vcpu->counter += vcpu->track_insn; + vcpu->track_insn = 0; + + int64_t uptime = uptime_ns(); + uint64_t expected_insn = num_insn_during(uptime); + + if (vcpu->counter >= expected_insn) { + /* this vcpu ran faster than expected, so it has to sleep */ + uint64_t insn_advance = vcpu->counter - expected_insn; + uint64_t time_advance_ns = time_for_insn(insn_advance); + int64_t sleep_us = time_advance_ns / 1000; + g_usleep(sleep_us); + } + + /* based on number of instructions, what should be the new time? */ + int64_t new_virtual_time = time_for_insn(vcpu->counter); + + g_mutex_lock(&global_state_lock); + + /* Time only moves forward. Another vcpu might have updated it already. */ + if (new_virtual_time > virtual_time_ns) { + qemu_plugin_update_ns(time_handle, new_virtual_time); + virtual_time_ns = new_virtual_time; + } + + g_mutex_unlock(&global_state_lock); +} + +static void set_start_time() +{ + g_mutex_lock(&global_state_lock); + if (!start_time_ns) { + start_time_ns = now_ns(); + } + g_mutex_unlock(&global_state_lock); +} + +static void vcpu_init(qemu_plugin_id_t id, unsigned int cpu_index) +{ + vCPUTime *vcpu = qemu_plugin_scoreboard_find(vcpus, cpu_index); + /* ensure start time is set first */ + set_start_time(); + /* start counter from absolute time reference */ + vcpu->counter = num_insn_during(uptime_ns()); + vcpu_set_state(vcpu, EXECUTING); +} + +static void vcpu_idle(qemu_plugin_id_t id, unsigned int cpu_index) +{ + vCPUTime *vcpu = qemu_plugin_scoreboard_find(vcpus, cpu_index); + vcpu_set_state(vcpu, IDLE); +} + +static void vcpu_resume(qemu_plugin_id_t id, unsigned int cpu_index) +{ + vCPUTime *vcpu = qemu_plugin_scoreboard_find(vcpus, cpu_index); + g_assert(vcpu->state == IDLE); + int64_t idle_time = now_ns() - vcpu->last_state_time; + /* accumulate expected number of instructions */ + vcpu->counter += num_insn_during(idle_time); + vcpu_set_state(vcpu, EXECUTING); +} + +static void vcpu_exit(qemu_plugin_id_t id, unsigned int cpu_index) +{ + vCPUTime *vcpu = qemu_plugin_scoreboard_find(vcpus, cpu_index); + vcpu_set_state(vcpu, FINISHED); + update_system_time(vcpu); + vcpu->counter = 0; +} + +static void every_insn_quantum(unsigned int cpu_index, void *udata) +{ + vCPUTime *vcpu = qemu_plugin_scoreboard_find(vcpus, cpu_index); + g_assert(vcpu->track_insn >= insn_quantum); + update_system_time(vcpu); +} + +static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb) +{ + size_t n_insns = qemu_plugin_tb_n_insns(tb); + qemu_plugin_u64 track_insn = + qemu_plugin_scoreboard_u64_in_struct(vcpus, vCPUTime, track_insn); + if (precise_execution) { + /* count (and eventually trap) on every instruction */ + for (int idx = 0; idx < qemu_plugin_tb_n_insns(tb); ++idx) { + struct qemu_plugin_insn *insn = qemu_plugin_tb_get_insn(tb, idx); + qemu_plugin_register_vcpu_insn_exec_inline_per_vcpu( + insn, QEMU_PLUGIN_INLINE_ADD_U64, track_insn, 1); + qemu_plugin_register_vcpu_insn_exec_cond_cb( + insn, every_insn_quantum, + QEMU_PLUGIN_CB_NO_REGS, QEMU_PLUGIN_COND_GE, + track_insn, insn_quantum, NULL); + } + } else { + /* count (and eventually trap) once per tb */ + qemu_plugin_register_vcpu_tb_exec_inline_per_vcpu( + tb, QEMU_PLUGIN_INLINE_ADD_U64, track_insn, n_insns); + qemu_plugin_register_vcpu_tb_exec_cond_cb( + tb, every_insn_quantum, + QEMU_PLUGIN_CB_NO_REGS, QEMU_PLUGIN_COND_GE, + track_insn, insn_quantum, NULL); + } +} + +static void plugin_exit(qemu_plugin_id_t id, void *udata) +{ + qemu_plugin_scoreboard_free(vcpus); +} + +QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id, + const qemu_info_t *info, int argc, + char **argv) +{ + for (int i = 0; i < argc; i++) { + char *opt = argv[i]; + g_auto(GStrv) tokens = g_strsplit(opt, "=", 2); + if (g_strcmp0(tokens[0], "ips") == 0) { + insn_per_second = g_ascii_strtoull(tokens[1], NULL, 10); + if (!insn_per_second && errno) { + fprintf(stderr, "%s: couldn't parse %s (%s)\n", + __func__, tokens[1], g_strerror(errno)); + return -1; + } + + } else if (g_strcmp0(tokens[0], "precise") == 0) { + if (!qemu_plugin_bool_parse(tokens[0], tokens[1], + &precise_execution)) { + fprintf(stderr, "boolean argument parsing failed: %s\n", opt); + return -1; + } + } else { + fprintf(stderr, "option parsing failed: %s\n", opt); + return -1; + } + } + + vcpus = qemu_plugin_scoreboard_new(sizeof(vCPUTime)); + insn_quantum = insn_per_second / NUM_TIME_UPDATE_PER_SEC; + + time_handle = qemu_plugin_request_time_control(); + g_assert(time_handle); + + qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans); + qemu_plugin_register_vcpu_init_cb(id, vcpu_init); + qemu_plugin_register_vcpu_idle_cb(id, vcpu_idle); + qemu_plugin_register_vcpu_resume_cb(id, vcpu_resume); + qemu_plugin_register_vcpu_exit_cb(id, vcpu_exit); + qemu_plugin_register_atexit_cb(id, plugin_exit, NULL); + + return 0; +} diff --git a/contrib/plugins/Makefile b/contrib/plugins/Makefile index 0b64d2c1e3a..449ead11305 100644 --- a/contrib/plugins/Makefile +++ b/contrib/plugins/Makefile @@ -27,6 +27,7 @@ endif NAMES += hwprofile NAMES += cache NAMES += drcov +NAMES += ips ifeq ($(CONFIG_WIN32),y) SO_SUFFIX := .dll