From patchwork Tue Jul 7 19:39:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Micha=C5=82_Leszczy=C5=84ski?= X-Patchwork-Id: 11649931 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BF46513B6 for ; Tue, 7 Jul 2020 19:41:56 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A561F206BE for ; Tue, 7 Jul 2020 19:41:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A561F206BE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=cert.pl Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jstSp-0007t4-CS; Tue, 07 Jul 2020 19:41:11 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jstSo-0007no-0c for xen-devel@lists.xenproject.org; Tue, 07 Jul 2020 19:41:10 +0000 X-Inumbo-ID: c9b27083-c089-11ea-8de3-12813bfff9fa Received: from bagnar.nask.net.pl (unknown [195.187.242.196]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id c9b27083-c089-11ea-8de3-12813bfff9fa; Tue, 07 Jul 2020 19:41:02 +0000 (UTC) Received: from bagnar.nask.net.pl (unknown [172.16.9.10]) by bagnar.nask.net.pl (Postfix) with ESMTP id 3F581A26B6; Tue, 7 Jul 2020 21:41:01 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by bagnar.nask.net.pl (Postfix) with ESMTP id 3CA2FA26B9; Tue, 7 Jul 2020 21:41:00 +0200 (CEST) X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" Received: from bagnar.nask.net.pl ([127.0.0.1]) by localhost (bagnar.nask.net.pl [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id Edb0dHd9Z37g; Tue, 7 Jul 2020 21:40:59 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by bagnar.nask.net.pl (Postfix) with ESMTP id 8BB3EA2657; Tue, 7 Jul 2020 21:40:59 +0200 (CEST) X-Virus-Scanned: amavisd-new at bagnar.nask.net.pl X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" Received: from bagnar.nask.net.pl ([127.0.0.1]) by localhost (bagnar.nask.net.pl [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 2Y_eDj3TRnSX; Tue, 7 Jul 2020 21:40:59 +0200 (CEST) Received: from belindir.nask.net.pl (belindir-ext.nask.net.pl [195.187.242.210]) by bagnar.nask.net.pl (Postfix) with ESMTP id 579C1A265A; Tue, 7 Jul 2020 21:40:59 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by belindir.nask.net.pl (Postfix) with ESMTP id 1830E2243D; Tue, 7 Jul 2020 21:40:05 +0200 (CEST) X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" Received: from belindir.nask.net.pl ([127.0.0.1]) by localhost (belindir.nask.net.pl [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id YPKWuYMmlrOk; Tue, 7 Jul 2020 21:39:59 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by belindir.nask.net.pl (Postfix) with ESMTP id D299522444; Tue, 7 Jul 2020 21:39:53 +0200 (CEST) X-Quarantine-ID: <6kPGelPQA59y> X-Virus-Scanned: amavisd-new at belindir.nask.net.pl X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" Received: from belindir.nask.net.pl ([127.0.0.1]) by localhost (belindir.nask.net.pl [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 6kPGelPQA59y; Tue, 7 Jul 2020 21:39:53 +0200 (CEST) Received: from mq-desktop.cert.pl (unknown [195.187.238.217]) by belindir.nask.net.pl (Postfix) with ESMTPSA id 9DBA82242E; Tue, 7 Jul 2020 21:39:53 +0200 (CEST) From: =?utf-8?q?Micha=C5=82_Leszczy=C5=84ski?= To: xen-devel@lists.xenproject.org Subject: [PATCH v6 06/11] x86/hvm: processor trace interface in HVM Date: Tue, 7 Jul 2020 21:39:45 +0200 Message-Id: <1916e06793ffaaa70c471bcd6bcf168597793bd5.1594150543.git.michal.leszczynski@cert.pl> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Julien Grall , Stefano Stabellini , luwei.kang@intel.com, Wei Liu , Andrew Cooper , Michal Leszczynski , Ian Jackson , George Dunlap , Jan Beulich , tamas.lengyel@intel.com, =?utf-8?q?Roger_Pau_Monn=C3=A9?= Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" From: Michal Leszczynski Implement necessary changes in common code/HVM to support processor trace features. Define vmtrace_pt_* API and implement trace buffer allocation/deallocation in common code. Signed-off-by: Michal Leszczynski --- xen/arch/x86/domain.c | 21 +++++++++++++++++++++ xen/common/domain.c | 35 +++++++++++++++++++++++++++++++++++ xen/include/asm-x86/hvm/hvm.h | 20 ++++++++++++++++++++ xen/include/xen/sched.h | 4 ++++ 4 files changed, 80 insertions(+) diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c index b75017b28b..8ce2ab6b8f 100644 --- a/xen/arch/x86/domain.c +++ b/xen/arch/x86/domain.c @@ -2205,6 +2205,27 @@ int domain_relinquish_resources(struct domain *d) altp2m_vcpu_disable_ve(v); } + for_each_vcpu ( d, v ) + { + unsigned int i; + uint64_t nr_pages = v->domain->processor_trace_buf_kb * KB(1); + nr_pages >>= PAGE_SHIFT; + + if ( !v->vmtrace.pt_buf ) + continue; + + for ( i = 0; i < nr_pages; i++ ) + { + struct page_info *pg = mfn_to_page( + mfn_add(page_to_mfn(v->vmtrace.pt_buf), i)); + + put_page_alloc_ref(pg); + put_page_and_type(pg); + } + + v->vmtrace.pt_buf = NULL; + } + if ( is_pv_domain(d) ) { for_each_vcpu ( d, v ) diff --git a/xen/common/domain.c b/xen/common/domain.c index e6e8f88da1..193099a2ab 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -137,6 +137,38 @@ static void vcpu_destroy(struct vcpu *v) free_vcpu_struct(v); } +static int vmtrace_alloc_buffers(struct vcpu *v) +{ + unsigned int i; + struct page_info *pg; + uint64_t size = v->domain->processor_trace_buf_kb * KB(1); + + pg = alloc_domheap_pages(v->domain, get_order_from_bytes(size), + MEMF_no_refcount); + + if ( !pg ) + return -ENOMEM; + + for ( i = 0; i < (size >> PAGE_SHIFT); i++ ) + { + struct page_info *pg_iter = mfn_to_page( + mfn_add(page_to_mfn(pg), i)); + + if ( !get_page_and_type(pg_iter, v->domain, PGT_writable_page) ) + { + /* + * The domain can't possibly know about this page yet, so failure + * here is a clear indication of something fishy going on. + */ + domain_crash(v->domain); + return -ENODATA; + } + } + + v->vmtrace.pt_buf = pg; + return 0; +} + struct vcpu *vcpu_create(struct domain *d, unsigned int vcpu_id) { struct vcpu *v; @@ -162,6 +194,9 @@ struct vcpu *vcpu_create(struct domain *d, unsigned int vcpu_id) v->vcpu_id = vcpu_id; v->dirty_cpu = VCPU_CPU_CLEAN; + if ( d->processor_trace_buf_kb && vmtrace_alloc_buffers(v) != 0 ) + return NULL; + spin_lock_init(&v->virq_lock); tasklet_init(&v->continue_hypercall_tasklet, NULL, NULL); diff --git a/xen/include/asm-x86/hvm/hvm.h b/xen/include/asm-x86/hvm/hvm.h index 1eb377dd82..476a216205 100644 --- a/xen/include/asm-x86/hvm/hvm.h +++ b/xen/include/asm-x86/hvm/hvm.h @@ -214,6 +214,10 @@ struct hvm_function_table { bool_t (*altp2m_vcpu_emulate_ve)(struct vcpu *v); int (*altp2m_vcpu_emulate_vmfunc)(const struct cpu_user_regs *regs); + /* vmtrace */ + int (*vmtrace_control_pt)(struct vcpu *v, bool enable); + int (*vmtrace_get_pt_offset)(struct vcpu *v, uint64_t *offset, uint64_t *size); + /* * Parameters and callbacks for hardware-assisted TSC scaling, * which are valid only when the hardware feature is available. @@ -655,6 +659,22 @@ static inline bool altp2m_vcpu_emulate_ve(struct vcpu *v) return false; } +static inline int vmtrace_control_pt(struct vcpu *v, bool enable) +{ + if ( hvm_funcs.vmtrace_control_pt ) + return hvm_funcs.vmtrace_control_pt(v, enable); + + return -EOPNOTSUPP; +} + +static inline int vmtrace_get_pt_offset(struct vcpu *v, uint64_t *offset, uint64_t *size) +{ + if ( hvm_funcs.vmtrace_get_pt_offset ) + return hvm_funcs.vmtrace_get_pt_offset(v, offset, size); + + return -EOPNOTSUPP; +} + /* * This must be defined as a macro instead of an inline function, * because it uses 'struct vcpu' and 'struct domain' which have diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h index c046e59886..b6f39233aa 100644 --- a/xen/include/xen/sched.h +++ b/xen/include/xen/sched.h @@ -253,6 +253,10 @@ struct vcpu /* vPCI per-vCPU area, used to store data for long running operations. */ struct vpci_vcpu vpci; + struct { + struct page_info *pt_buf; + } vmtrace; + struct arch_vcpu arch; };