From nobody Sun Feb 8 04:12:06 2026 Received: from mail-yb1-f201.google.com (mail-yb1-f201.google.com [209.85.219.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C3E7413C8FF for ; Tue, 20 Aug 2024 04:38:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724128695; cv=none; b=U17qi89KWkButg2ttoMkpHrI3lW83SILteSM915/pP2MgOYNQ/BO8RfEmxlDJ3LeXVvXaV3GyxzMJtQxulxrduKF5eUlbQjX655P2ZadDKx3GTOrL+axd93PhW9nQ+VcWDTyR7zkbtNJvsLeUT8rRHk+vu51fwXA5BSfwu/vxao= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724128695; c=relaxed/simple; bh=poG3kBQSpIW+a3CJ5/IyZwN+BzRPc6FZnR04OujsFQg=; h=Date:In-Reply-To:Message-Id:Mime-Version:References:Subject:From: To:Cc:Content-Type; b=dyYex07o7hubJwaf63th9RE2KKHA3XVQKJsItExxJlsv1BgjwTjg5maRncunMWDSESnBokIGJUvOqATcrxTdDE5weQE0O+SGFW0ywcnbtGPHIEWEgnciIA3uqkpTYeCDrT77O8944GIVngyBTb/0Ym7jy9niIin4s6wIBMy/IVA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--suleiman.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=bUC3M/fQ; arc=none smtp.client-ip=209.85.219.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--suleiman.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="bUC3M/fQ" Received: by mail-yb1-f201.google.com with SMTP id 3f1490d57ef6-e0353b731b8so8234658276.2 for ; Mon, 19 Aug 2024 21:38:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1724128693; x=1724733493; darn=vger.kernel.org; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=FKSsf9Lzm9EYSf/AobA/jkSovK0xSmbEfKJnNNfJ50Y=; b=bUC3M/fQqZnqH1rD8fpY3F9qkrAMk0f+EUiXIqH/UVW65QGRQXTOurrRZcvnpmtu4G jgAn5BT8NEUe1al6TBJSv+qYvgV2Wte8V826LErJ96/5DUjhxG2SXsHONgzNvrnAwM95 5sGtSot3OrqbEVvWjOhJxPHNMwhLDZh3hJiBnGTmtYUfM7SAEqRA2so6E3dlNnwJce2P 65urq+d2lfGiqv7fuwGHEbSVr8a+/pjG9OQcj3j77NHRHzc3ly11ah8S3C3vBusadEcr U586u0Iqy08zMYigEKQREx02PBrxG9J2HbvoKmJsHnk7ja2PazqfvMmxCTazc1Ug7lhx /MVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724128693; x=1724733493; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=FKSsf9Lzm9EYSf/AobA/jkSovK0xSmbEfKJnNNfJ50Y=; b=ikuGF8PtiGY/wO/k3aGE+GX5FAUmOvxuwXq+6UbzxiLFy3f+tvMFr7lqMxpuadYWZn ra+hphrCsuOpHBXGjeCoKyi5OM4LxT8lT6TuH9MWEvKhAJLRhNAfyCURcAXHSS4dzL5p 2YbFUSmIeskXfmkoAew5/dIuVt6h7X9a1jNBO77vBzGLp1u1/481dpO6OgEcytOKCT3v cV6B+EWjH1NKan4Wl9UMOYA1KnSvFQ3enusHOabXhTscFrQQMUHmMcH4N+gc+WRE3JZd 75qGuNb600CPV/qyR7dRMbQf2Ks+LxQq1ncW1wufoFrd4gjiHHkOdMupXE/N8po4tOix gaPQ== X-Forwarded-Encrypted: i=1; AJvYcCWYAc7GD9FF2QYSlyCQayHgW+XbvdtOMudlNmz/RuckYvVDTFP0qKnJdHcapWLYIDnVtJFBWJacI34uERc=@vger.kernel.org X-Gm-Message-State: AOJu0YzI4v8RxX/WmWoE+1LbL+dDHhSZz4+tRAzSdaOPSzjsBN2o07xC cpNb94KMv2REg7v2ICfVgwcs8/klnJb4/V6XV3OxAsFDi9tZtl/9gEKQIobX16pw1UtCgwG/MTC 1G6Y0ybt1Zw== X-Google-Smtp-Source: AGHT+IFPqwVaoVkfiG5pcO12KiFYHLAsirwex5WI2NFCnwFw7UYHoZ3jKbECokBCiiQpEVBTD1Terc8qaRFOPQ== X-Received: from suleiman1.tok.corp.google.com ([2401:fa00:8f:203:7c18:89e3:3db:64bf]) (user=suleiman job=sendgmr) by 2002:a05:6902:504:b0:e11:7105:956a with SMTP id 3f1490d57ef6-e1180e6c0d4mr23970276.3.1724128692630; Mon, 19 Aug 2024 21:38:12 -0700 (PDT) Date: Tue, 20 Aug 2024 13:35:41 +0900 In-Reply-To: <20240820043543.837914-1-suleiman@google.com> Message-Id: <20240820043543.837914-2-suleiman@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240820043543.837914-1-suleiman@google.com> X-Mailer: git-send-email 2.46.0.184.g6999bdac58-goog Subject: [PATCH v2 1/3] KVM: Introduce kvm_total_suspend_ns(). From: Suleiman Souhlal To: Paolo Bonzini , Sean Christopherson Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Chao Gao , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, ssouhlal@freebsd.org, Suleiman Souhlal Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" It returns the cumulative nanoseconds that the host has been suspended. It is intended to be used for reporting host suspend time to the guest. Signed-off-by: Suleiman Souhlal Reviewed-by: Chao Gao --- include/linux/kvm_host.h | 2 ++ virt/kvm/kvm_main.c | 13 +++++++++++++ 2 files changed, 15 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index b23c6d48392f7c..8fec37b372d8c0 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -2494,4 +2494,6 @@ long kvm_arch_vcpu_pre_fault_memory(struct kvm_vcpu *= vcpu, struct kvm_pre_fault_memory *range); #endif =20 +u64 kvm_total_suspend_ns(void); + #endif diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index cb2b78e92910fb..2235933d9247bc 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -5720,6 +5720,15 @@ static void kvm_shutdown(void) on_each_cpu(hardware_disable_nolock, NULL, 1); } =20 +static u64 last_suspend; +static u64 total_suspend_ns; + +u64 +kvm_total_suspend_ns(void) +{ + return total_suspend_ns; +} + static int kvm_suspend(void) { /* @@ -5735,6 +5744,8 @@ static int kvm_suspend(void) =20 if (kvm_usage_count) hardware_disable_nolock(NULL); + + last_suspend =3D ktime_get_boottime_ns(); return 0; } =20 @@ -5745,6 +5756,8 @@ static void kvm_resume(void) =20 if (kvm_usage_count) WARN_ON_ONCE(__hardware_enable_nolock()); + + total_suspend_ns +=3D ktime_get_boottime_ns() - last_suspend; } =20 static struct syscore_ops kvm_syscore_ops =3D { --=20 2.46.0.184.g6999bdac58-goog