From nobody Thu Nov 28 05:56:22 2024 Received: from smtp-fw-80009.amazon.com (smtp-fw-80009.amazon.com [99.78.197.220]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 10C222141D3; Fri, 4 Oct 2024 14:10:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=99.78.197.220 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728051005; cv=none; b=YSNxDUUq4T5ETgee9uL8PkZ1n66JaN1xGckHs9GR0RRsR0Q6VSgffF2CWlLgedGH8sHb3uHs8N5gu0YIB3pKnneWbVor3C9keHxujTwfyfUlPdDKGPWCA8kEUkUCEZeZij4pWOzwtajH2b7K6l4erc5ER4uKfmlFjK5tBAEh/EE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728051005; c=relaxed/simple; bh=vrF9jUMfBrFiNavN18zZLj43ZpdBHA7TJjesVWiYw4c=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=RGx7qzWNm6lbh3ARWu3KDbupyxQtEnybAuAbOukEcQwvCJrmmpPoBZ+IGGKdTMyQybgOxpYSROwRo/2k4T8ZzDQ7hH58Lm+uwgwt1A1eZR0HrT5tYY+xMLSQQFrEwelwxpbgXiwI1mhfKzl85H4Hg07svQ6v2M2ZGY1YK2OBiD4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.de; spf=pass smtp.mailfrom=amazon.de; dkim=pass (1024-bit key) header.d=amazon.de header.i=@amazon.de header.b=Cpwj0U9h; arc=none smtp.client-ip=99.78.197.220 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amazon.de header.i=@amazon.de header.b="Cpwj0U9h" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.de; i=@amazon.de; q=dns/txt; s=amazon201209; t=1728051004; x=1759587004; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=OeoT6WkOeJV7Rwi3GpbrV9LuWN/LKpWTB6zvQCrlovE=; b=Cpwj0U9hfHG9iT9rj2BcOB8MG3Coq919g5NgRyEowgXNmBJ3nf8XNtpN NfgUXWU9mTdFQf0jPt1EQPl8ydxY48MCtSOTvt9RjRm7f0SrTSIaXHYS2 CMTUeJpndUn8qYdsi5i5IwK3Ehr+OocI3GRgr9ePFYAOSDIBnjVQRx/9Z Y=; X-IronPort-AV: E=Sophos;i="6.11,177,1725321600"; d="scan'208";a="134729068" Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO smtpout.prod.us-west-2.prod.farcaster.email.amazon.dev) ([10.25.36.210]) by smtp-border-fw-80009.pdx80.corp.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Oct 2024 14:10:02 +0000 Received: from EX19MTAEUA002.ant.amazon.com [10.0.17.79:24900] by smtpin.naws.eu-west-1.prod.farcaster.email.amazon.dev [10.0.17.12:2525] with esmtp (Farcaster) id c23a1a42-86a1-4515-b757-3dc0de7b5e83; Fri, 4 Oct 2024 14:10:01 +0000 (UTC) X-Farcaster-Flow-ID: c23a1a42-86a1-4515-b757-3dc0de7b5e83 Received: from EX19D004EUA004.ant.amazon.com (10.252.50.183) by EX19MTAEUA002.ant.amazon.com (10.252.50.124) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.34; Fri, 4 Oct 2024 14:10:01 +0000 Received: from EX19MTAUEB002.ant.amazon.com (10.252.135.47) by EX19D004EUA004.ant.amazon.com (10.252.50.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.34; Fri, 4 Oct 2024 14:10:00 +0000 Received: from email-imr-corp-prod-iad-all-1a-f1af3bd3.us-east-1.amazon.com (10.43.8.2) by mail-relay.amazon.com (10.252.135.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.34 via Frontend Transport; Fri, 4 Oct 2024 14:10:00 +0000 Received: from dev-dsk-nikwip-1b-bc9ec026.eu-west-1.amazon.com (dev-dsk-nikwip-1b-bc9ec026.eu-west-1.amazon.com [10.253.74.52]) by email-imr-corp-prod-iad-all-1a-f1af3bd3.us-east-1.amazon.com (Postfix) with ESMTPS id DBE154037C; Fri, 4 Oct 2024 14:09:58 +0000 (UTC) From: Nikolas Wipper To: Vitaly Kuznetsov CC: Nicolas Saenz Julienne , Alexander Graf , James Gowans , , Sean Christopherson , "Paolo Bonzini" , Thomas Gleixner , "Ingo Molnar" , Borislav Petkov , Dave Hansen , Nikolas Wipper , , , , , , "Nikolas Wipper" Subject: [PATCH 6/7] KVM: x86: Add trace events to track Hyper-V suspensions Date: Fri, 4 Oct 2024 14:08:09 +0000 Message-ID: <20241004140810.34231-7-nikwip@amazon.de> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20241004140810.34231-1-nikwip@amazon.de> References: <20241004140810.34231-1-nikwip@amazon.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add trace events to track suspensions and unsuspensions vCPUs, because of Hyper-V mechanisms. Signed-off-by: Nikolas Wipper --- arch/x86/kvm/hyperv.c | 4 ++++ arch/x86/kvm/trace.h | 39 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 40ea8340838f..55b8f88a91cb 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2944,6 +2944,8 @@ void kvm_hv_vcpu_suspend_tlb_flush(struct kvm_vcpu *v= cpu, int vcpu_id) /* waiting_on's store should happen before suspended's */ WRITE_ONCE(vcpu->arch.hyperv->waiting_on, vcpu_id); WRITE_ONCE(vcpu->arch.hyperv->suspended, true); + + trace_kvm_hv_vcpu_suspend_tlb_flush(vcpu->vcpu_id, vcpu_id); } =20 void kvm_hv_vcpu_unsuspend_tlb_flush(struct kvm_vcpu *vcpu) @@ -2962,6 +2964,8 @@ void kvm_hv_vcpu_unsuspend_tlb_flush(struct kvm_vcpu = *vcpu) WRITE_ONCE(v->arch.hyperv->waiting_on, -1); WRITE_ONCE(v->arch.hyperv->suspended, false); __set_bit(i, vcpu_mask); + + trace_kvm_hv_vcpu_unsuspend_tlb_flush(v->vcpu_id); } } =20 diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h index d3aeffd6ae75..5564ef52fd9d 100644 --- a/arch/x86/kvm/trace.h +++ b/arch/x86/kvm/trace.h @@ -1871,6 +1871,45 @@ TRACE_EVENT(kvm_rmp_fault, __entry->error_code, __entry->rmp_level, __entry->psmash_ret) ); =20 +/* + * Tracepoint for Hyper-V TlbFlushInhibit suspension + */ +TRACE_EVENT(kvm_hv_vcpu_suspend_tlb_flush, + TP_PROTO(int vcpu_id, int waiting_on), + TP_ARGS(vcpu_id, waiting_on), + + TP_STRUCT__entry( + __field(int, vcpu_id) + __field(int, waiting_on) + ), + + TP_fast_assign( + __entry->vcpu_id =3D vcpu_id; + __entry->waiting_on =3D waiting_on; + ), + + TP_printk("suspending vcpu %u waiting on %u", + __entry->vcpu_id, __entry->waiting_on) +); + +/* + * Tracepoint for Hyper-V TlbFlushInhibit unsuspension + */ +TRACE_EVENT(kvm_hv_vcpu_unsuspend_tlb_flush, + TP_PROTO(int vcpu_id), + TP_ARGS(vcpu_id), + TP_STRUCT__entry( + __field(int, vcpu_id) + ), + + TP_fast_assign( + __entry->vcpu_id =3D vcpu_id; + ), + + TP_printk("unsuspending vcpu %u", + __entry->vcpu_id) +); + #endif /* _TRACE_KVM_H */ =20 #undef TRACE_INCLUDE_PATH --=20 2.40.1 Amazon Web Services Development Center Germany GmbH Krausenstr. 38 10117 Berlin Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss Eingetragen am Amtsgericht Charlottenburg unter HRB 257764 B Sitz: Berlin Ust-ID: DE 365 538 597