From: Jan Beulich <jbeulich@suse.com> To: Chao Gao <chao.gao@intel.com> Cc: xen-devel@lists.xenproject.org, "Roger Pau Monné" <roger.pau@citrix.com>, "Ashok Raj" <ashok.raj@intel.com>, "Wei Liu" <wl@xen.org>, "Andrew Cooper" <andrew.cooper3@citrix.com> Subject: Re: [Xen-devel] [PATCH v9 10/15] microcode: split out apply_microcode() from cpu_request_microcode() Date: Thu, 29 Aug 2019 12:19:32 +0200 Message-ID: <86fbb756-85ce-5def-87bc-6a90cce22018@suse.com> (raw) In-Reply-To: <1566177928-19114-11-git-send-email-chao.gao@intel.com> On 19.08.2019 03:25, Chao Gao wrote: > @@ -300,32 +322,44 @@ int microcode_update(XEN_GUEST_HANDLE_PARAM(const_void) buf, unsigned long len) > if ( microcode_ops == NULL ) > return -EINVAL; > > - info = xmalloc_bytes(sizeof(*info) + len); > - if ( info == NULL ) > + buffer = xmalloc_bytes(len); > + if ( !buffer ) > return -ENOMEM; > > - ret = copy_from_guest(info->buffer, buf, len); > - if ( ret != 0 ) > + if ( copy_from_guest(buffer, buf, len) ) > { > - xfree(info); > - return ret; > + ret = -EFAULT; > + goto free; > } > > - info->buffer_size = len; > - info->error = 0; > - info->cpu = cpumask_first(&cpu_online_map); > - > if ( microcode_ops->start_update ) > { > ret = microcode_ops->start_update(); > if ( ret != 0 ) > - { > - xfree(info); > - return ret; > - } > + goto free; > } > > - return continue_hypercall_on_cpu(info->cpu, do_microcode_update, info); > + patch = parse_blob(buffer, len); > + if ( IS_ERR(patch) ) > + { > + ret = PTR_ERR(patch); > + printk(XENLOG_INFO "Parsing microcode blob error %d\n", ret); I think this wants to be at least XENLOG_WARNING. > @@ -372,23 +406,46 @@ int __init early_microcode_update_cpu(bool start_update) > > microcode_ops->collect_cpu_info(&this_cpu(cpu_sig)); > > - if ( data ) > + if ( !data ) > + return -ENOMEM; > + > + if ( start_update ) > { > - if ( start_update && microcode_ops->start_update ) > + struct microcode_patch *patch; > + > + if ( microcode_ops->start_update ) > rc = microcode_ops->start_update(); > > if ( rc ) > return rc; > > - rc = microcode_update_cpu(data, len); > + patch = parse_blob(data, len); > + if ( IS_ERR(patch) ) > + { > + printk(XENLOG_INFO "Parsing microcode blob error %ld\n", Same here. > + PTR_ERR(patch)); > + return PTR_ERR(patch); > + } > + > + if ( !patch ) > + { > + printk(XENLOG_INFO "No ucode found. Update aborted!\n"); Here I'm not sure the message is worthwhile to have. > @@ -41,8 +42,6 @@ struct cpu_signature { > DECLARE_PER_CPU(struct cpu_signature, cpu_sig); > extern const struct microcode_ops *microcode_ops; > > -const struct microcode_patch *microcode_get_cache(void); > -bool microcode_update_cache(struct microcode_patch *patch); If you remove the declaration but not the definition, then the latter should become static. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
next prev parent reply index Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-08-19 1:25 [Xen-devel] [PATCH v9 00/15] improve late microcode loading Chao Gao 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 01/15] microcode/intel: extend microcode_update_match() Chao Gao 2019-08-28 15:12 ` Jan Beulich 2019-08-29 7:15 ` Chao Gao 2019-08-29 7:14 ` Jan Beulich 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 02/15] microcode/amd: fix memory leak Chao Gao 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 03/15] microcode/amd: distinguish old and mismatched ucode in microcode_fits() Chao Gao 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 04/15] microcode: introduce a global cache of ucode patch Chao Gao 2019-08-22 11:11 ` Roger Pau Monné 2019-08-28 15:21 ` Jan Beulich 2019-08-29 10:18 ` Jan Beulich 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 05/15] microcode: clean up microcode_resume_cpu Chao Gao 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 06/15] microcode: remove struct ucode_cpu_info Chao Gao 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 07/15] microcode: remove pointless 'cpu' parameter Chao Gao 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 08/15] microcode/amd: call svm_host_osvw_init() in common code Chao Gao 2019-08-22 13:08 ` Roger Pau Monné 2019-08-28 15:26 ` Jan Beulich 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 09/15] microcode: pass a patch pointer to apply_microcode() Chao Gao 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 10/15] microcode: split out apply_microcode() from cpu_request_microcode() Chao Gao 2019-08-22 13:59 ` Roger Pau Monné 2019-08-29 10:06 ` Jan Beulich 2019-08-30 3:22 ` Chao Gao 2019-08-30 7:25 ` Jan Beulich 2019-08-29 10:19 ` Jan Beulich [this message] 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 11/15] microcode: unify loading update during CPU resuming and AP wakeup Chao Gao 2019-08-22 14:10 ` Roger Pau Monné 2019-08-22 16:44 ` Chao Gao 2019-08-23 9:09 ` Roger Pau Monné 2019-08-29 7:37 ` Chao Gao 2019-08-29 8:16 ` Roger Pau Monné 2019-08-29 10:26 ` Jan Beulich 2019-08-29 10:29 ` Jan Beulich 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 12/15] microcode: reduce memory allocation and copy when creating a patch Chao Gao 2019-08-23 8:11 ` Roger Pau Monné 2019-08-26 7:03 ` Chao Gao 2019-08-26 8:11 ` Roger Pau Monné 2019-08-29 10:47 ` Jan Beulich 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 13/15] x86/microcode: Synchronize late microcode loading Chao Gao 2019-08-19 10:27 ` Sergey Dyasli 2019-08-19 14:49 ` Chao Gao 2019-08-29 12:06 ` Jan Beulich 2019-08-30 3:30 ` Chao Gao 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 14/15] microcode: remove microcode_update_lock Chao Gao 2019-08-19 1:25 ` [Xen-devel] [PATCH v9 15/15] microcode: block #NMI handling when loading an ucode Chao Gao 2019-08-23 8:46 ` Sergey Dyasli 2019-08-26 8:07 ` Chao Gao 2019-08-27 4:52 ` Chao Gao 2019-08-28 8:52 ` Sergey Dyasli 2019-08-29 12:11 ` Jan Beulich 2019-08-30 6:35 ` Chao Gao 2019-09-09 5:52 ` Chao Gao 2019-09-09 6:16 ` Jan Beulich 2019-08-29 12:22 ` Jan Beulich 2019-08-30 6:33 ` Chao Gao 2019-08-30 7:30 ` Jan Beulich 2019-08-22 7:51 ` [Xen-devel] [PATCH v9 00/15] improve late microcode loading Sergey Dyasli 2019-08-22 15:39 ` Chao Gao
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