From patchwork Thu Sep 26 13:53:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chao Gao X-Patchwork-Id: 11162787 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 08A19912 for ; Thu, 26 Sep 2019 13:51:15 +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 E1528207FF for ; Thu, 26 Sep 2019 13:51:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E1528207FF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none 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 4.89) (envelope-from ) id 1iDU9Y-00024N-65; Thu, 26 Sep 2019 13:49:52 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1iDU9W-00023m-83 for xen-devel@lists.xenproject.org; Thu, 26 Sep 2019 13:49:50 +0000 X-Inumbo-ID: 7d7576b6-e064-11e9-8628-bc764e2007e4 Received: from mga04.intel.com (unknown [192.55.52.120]) by localhost (Halon) with ESMTPS id 7d7576b6-e064-11e9-8628-bc764e2007e4; Thu, 26 Sep 2019 13:49:41 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Sep 2019 06:49:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,552,1559545200"; d="scan'208";a="189126026" Received: from gao-cwp.sh.intel.com ([10.239.159.26]) by fmsmga008.fm.intel.com with ESMTP; 26 Sep 2019 06:49:39 -0700 From: Chao Gao To: xen-devel@lists.xenproject.org Date: Thu, 26 Sep 2019 21:53:30 +0800 Message-Id: <1569506015-26938-3-git-send-email-chao.gao@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1569506015-26938-1-git-send-email-chao.gao@intel.com> References: <1569506015-26938-1-git-send-email-chao.gao@intel.com> Subject: [Xen-devel] [PATCH v11 2/7] microcode: unify ucode loading during system bootup and resuming X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Sergey Dyasli , Ashok Raj , Wei Liu , Andrew Cooper , Jan Beulich , Chao Gao , =?utf-8?q?R?= =?utf-8?q?oger_Pau_Monn=C3=A9?= MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" During system bootup and resuming, CPUs just load the cached ucode. So one unified function microcode_update_one() is introduced. It takes a boolean to indicate whether ->start_update should be called. Since early_microcode_update_cpu() is only called on BSP (APs call the unified function), start_update is always true and so remove this parameter. There is a functional change: ->start_update is called on BSP and ->end_update_percpu is called during system resuming. They are not invoked by previous microcode_resume_cpu(). Signed-off-by: Chao Gao Reviewed-by: Jan Beulich --- Changes in v10: - call ->start_update for system resume from suspension Changes in v9: - return -EOPNOTSUPP rather than 0 if microcode_ops is NULL in microcode_update_one() - rebase and fix conflicts. Changes in v8: - split out from the previous patch --- xen/arch/x86/acpi/power.c | 2 +- xen/arch/x86/microcode.c | 91 +++++++++++++++++++---------------------- xen/arch/x86/smpboot.c | 5 +-- xen/include/asm-x86/processor.h | 4 +- 4 files changed, 45 insertions(+), 57 deletions(-) diff --git a/xen/arch/x86/acpi/power.c b/xen/arch/x86/acpi/power.c index 269b140..01e6aec 100644 --- a/xen/arch/x86/acpi/power.c +++ b/xen/arch/x86/acpi/power.c @@ -278,7 +278,7 @@ static int enter_state(u32 state) console_end_sync(); - microcode_resume_cpu(); + microcode_update_one(true); if ( !recheck_cpu_features(0) ) panic("Missing previously available feature(s)\n"); diff --git a/xen/arch/x86/microcode.c b/xen/arch/x86/microcode.c index 3ea2a6e..9c0e5c4 100644 --- a/xen/arch/x86/microcode.c +++ b/xen/arch/x86/microcode.c @@ -203,24 +203,6 @@ static struct microcode_patch *parse_blob(const char *buf, size_t len) return NULL; } -int microcode_resume_cpu(void) -{ - int err; - struct cpu_signature *sig = &this_cpu(cpu_sig); - - if ( !microcode_ops ) - return 0; - - spin_lock(µcode_mutex); - - err = microcode_ops->collect_cpu_info(sig); - if ( likely(!err) ) - err = microcode_ops->apply_microcode(microcode_cache); - spin_unlock(µcode_mutex); - - return err; -} - void microcode_free_patch(struct microcode_patch *microcode_patch) { microcode_ops->free_patch(microcode_patch->mc); @@ -391,11 +373,38 @@ static int __init microcode_init(void) } __initcall(microcode_init); -int __init early_microcode_update_cpu(bool start_update) +/* Load a cached update to current cpu */ +int microcode_update_one(bool start_update) +{ + int err; + + if ( !microcode_ops ) + return -EOPNOTSUPP; + + microcode_ops->collect_cpu_info(&this_cpu(cpu_sig)); + + if ( start_update && microcode_ops->start_update ) + { + err = microcode_ops->start_update(); + if ( err ) + return err; + } + + err = microcode_update_cpu(NULL); + + if ( microcode_ops->end_update_percpu ) + microcode_ops->end_update_percpu(); + + return err; +} + +/* BSP calls this function to parse ucode blob and then apply an update. */ +int __init early_microcode_update_cpu(void) { int rc = 0; void *data = NULL; size_t len; + struct microcode_patch *patch; if ( !microcode_ops ) return -ENOSYS; @@ -411,44 +420,26 @@ int __init early_microcode_update_cpu(bool start_update) data = bootstrap_map(&ucode_mod); } - microcode_ops->collect_cpu_info(&this_cpu(cpu_sig)); - if ( !data ) return -ENOMEM; - if ( start_update ) + patch = parse_blob(data, len); + if ( IS_ERR(patch) ) { - struct microcode_patch *patch; - - patch = parse_blob(data, len); - if ( IS_ERR(patch) ) - { - printk(XENLOG_WARNING "Parsing microcode blob error %ld\n", - PTR_ERR(patch)); - return PTR_ERR(patch); - } - - if ( !patch ) - return -ENOENT; - - spin_lock(µcode_mutex); - rc = microcode_update_cache(patch); - spin_unlock(µcode_mutex); - ASSERT(rc); - - if ( microcode_ops->start_update ) - rc = microcode_ops->start_update(); - - if ( rc ) - return rc; + printk(XENLOG_WARNING "Parsing microcode blob error %ld\n", + PTR_ERR(patch)); + return PTR_ERR(patch); } - rc = microcode_update_cpu(NULL); + if ( !patch ) + return -ENOENT; - if ( microcode_ops->end_update_percpu ) - microcode_ops->end_update_percpu(); + spin_lock(µcode_mutex); + rc = microcode_update_cache(patch); + spin_unlock(µcode_mutex); + ASSERT(rc); - return rc; + return microcode_update_one(true); } int __init early_microcode_init(void) @@ -468,7 +459,7 @@ int __init early_microcode_init(void) microcode_ops->collect_cpu_info(&this_cpu(cpu_sig)); if ( ucode_mod.mod_end || ucode_blob.size ) - rc = early_microcode_update_cpu(true); + rc = early_microcode_update_cpu(); } return rc; diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c index 73a1afc..179f6b6 100644 --- a/xen/arch/x86/smpboot.c +++ b/xen/arch/x86/smpboot.c @@ -360,10 +360,7 @@ void start_secondary(void *unused) initialize_cpu_data(cpu); - if ( system_state <= SYS_STATE_smp_boot ) - early_microcode_update_cpu(false); - else - microcode_resume_cpu(); + microcode_update_one(false); /* * If MSR_SPEC_CTRL is available, apply Xen's default setting and discard diff --git a/xen/include/asm-x86/processor.h b/xen/include/asm-x86/processor.h index a673372..c92956f 100644 --- a/xen/include/asm-x86/processor.h +++ b/xen/include/asm-x86/processor.h @@ -569,9 +569,9 @@ int guest_wrmsr_xen(struct vcpu *v, uint32_t idx, uint64_t val); void microcode_set_module(unsigned int); int microcode_update(XEN_GUEST_HANDLE_PARAM(const_void), unsigned long len); -int microcode_resume_cpu(void); -int early_microcode_update_cpu(bool start_update); +int early_microcode_update_cpu(void); int early_microcode_init(void); +int microcode_update_one(bool start_update); int microcode_init_intel(void); int microcode_init_amd(void);