All of lore.kernel.org
 help / color / mirror / Atom feed
From: Borislav Petkov <bp@suse.de>
To: Vitezslav Samel <vitezslav@samel.cz>
Cc: "Raj, Ashok" <ashok.raj@intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org
Subject: Re: 4.15.17 regression: bisected: timeout during microcode update
Date: Thu, 19 Apr 2018 14:18:41 +0200	[thread overview]
Message-ID: <20180419121840.GF3896@pd.tnic> (raw)
In-Reply-To: <20180419120239.GA2377@pc11.op.pod.cz>

On Thu, Apr 19, 2018 at 02:02:39PM +0200, Vitezslav Samel wrote:
>   Here it is:

Thanks!

> -------------------------------------------------------------
> microcode: __reload_late: CPU1
> microcode: __reload_late: CPU3
> microcode: __reload_late: CPU2
> microcode: __reload_late: CPU0
> microcode: __reload_late: CPU1 reloading
> microcode: __reload_late: CPU3 reloading
> microcode: __reload_late: CPU2 reloading
> microcode: __reload_late: CPU0 reloading
> microcode: __reload_late: CPU3 returning 0x0

Aaaha, there it is.

Ok, debug patch v2, please do the same.

Thx.

---
diff --git a/arch/x86/kernel/cpu/microcode/core.c b/arch/x86/kernel/cpu/microcode/core.c
index 10c4fc2c91f8..737f93422d0b 100644
--- a/arch/x86/kernel/cpu/microcode/core.c
+++ b/arch/x86/kernel/cpu/microcode/core.c
@@ -553,6 +553,8 @@ static int __reload_late(void *info)
 	enum ucode_state err;
 	int ret = 0;
 
+	pr_info("%s: CPU%d\n", __func__, cpu);
+
 	/*
 	 * Wait for all CPUs to arrive. A load will not be attempted unless all
 	 * CPUs show up.
@@ -560,6 +562,8 @@ static int __reload_late(void *info)
 	if (__wait_for_cpus(&late_cpus_in, NSEC_PER_SEC))
 		return -1;
 
+	pr_info("%s: CPU%d reloading\n", __func__, cpu);
+
 	spin_lock(&update_lock);
 	apply_microcode_local(&err);
 	spin_unlock(&update_lock);
@@ -571,9 +575,12 @@ static int __reload_late(void *info)
 	} else if (err == UCODE_UPDATED || err == UCODE_OK) {
 		ret = 1;
 	} else {
+		pr_info("%s: CPU%d returning 0x%x\n", __func__, cpu, err);
 		return ret;
 	}
 
+	pr_info("%s: CPU%d waiting to exit\n", __func__, cpu);
+
 	/*
 	 * Increase the wait timeout to a safe value here since we're
 	 * serializing the microcode update and that could take a while on a
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index 32b8e5724f96..ad0a19154c40 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -727,21 +727,32 @@ static struct microcode_intel *find_patch(struct ucode_cpu_info *uci)
 {
 	struct microcode_header_intel *phdr;
 	struct ucode_patch *iter, *tmp;
+	int cpu = smp_processor_id();
 
 	list_for_each_entry_safe(iter, tmp, &microcode_cache, plist) {
 
 		phdr = (struct microcode_header_intel *)iter->data;
 
+		pr_info("%s: CPU%d, phdr: 0x%x, uci: 0x%x\n",
+			__func__, cpu, phdr->rev, uci->cpu_sig.rev);
+
 		if (phdr->rev <= uci->cpu_sig.rev)
 			continue;
 
+		pr_info("%s: CPU%d, find_matching_signature: sig: 0x%x, pf: 0x%x\n",
+			__func__, cpu, uci->cpu_sig.sig, uci->cpu_sig.pf);
+
 		if (!find_matching_signature(phdr,
 					     uci->cpu_sig.sig,
 					     uci->cpu_sig.pf))
 			continue;
 
+
+		pr_info("%s: CPU%d, found phdr: 0x%x\n", __func__, cpu, phdr->rev);
 		return iter->data;
 	}
+
+	pr_info("%s: CPU%d, NADA\n", __func__, cpu);
 	return NULL;
 }
 
@@ -805,8 +816,10 @@ static enum ucode_state apply_microcode_intel(int cpu)
 	mc = find_patch(uci);
 	if (!mc) {
 		mc = uci->mc;
-		if (!mc)
+		if (!mc) {
+			pr_info("%s: CPU%d, NFOUND\n", __func__, cpu);
 			return UCODE_NFOUND;
+		}
 	}
 
 	/*

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
-- 

  reply	other threads:[~2018-04-19 12:18 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-18  8:11 Vitezslav Samel
2018-04-18 10:07 ` Borislav Petkov
2018-04-18 12:08   ` Vitezslav Samel
2018-04-18 12:22     ` Borislav Petkov
2018-04-18 13:53       ` Raj, Ashok
2018-04-18 16:14         ` Borislav Petkov
2018-04-19  5:35         ` Vitezslav Samel
2018-04-19  7:22           ` Raj, Ashok
2018-04-19 10:48           ` Borislav Petkov
2018-04-19 12:02             ` Vitezslav Samel
2018-04-19 12:18               ` Borislav Petkov [this message]
2018-04-19 12:32                 ` Raj, Ashok
2018-04-19 13:48                   ` Vitezslav Samel
2018-04-19 13:46                 ` Vitezslav Samel
2018-04-19 16:37                   ` Borislav Petkov
2018-04-20  6:20                     ` Vitezslav Samel
2018-04-20  9:52                       ` Borislav Petkov
2018-04-20 10:01                         ` Vitezslav Samel
2018-04-20 10:32                           ` Borislav Petkov
2018-04-20 10:34                             ` [PATCH 1/2] x86/microcode/intel: Save microcode patch unconditionally Borislav Petkov
2018-04-20 10:54                               ` Vitezslav Samel
2018-04-20 15:59                               ` Raj, Ashok
2018-04-20 10:37                             ` [PATCH 2/2] x86/microcode: Do not exit early from __reload_late() Borislav Petkov
2018-04-20 10:54                               ` Vitezslav Samel
2018-04-20 16:00                               ` Raj, Ashok
2018-04-21  8:19 ` [PATCH 1/2] x86/microcode/intel: Save microcode patch unconditionally Borislav Petkov
2018-04-21  8:19   ` [PATCH 2/2] x86/microcode: Do not exit early from __reload_late() Borislav Petkov
2018-04-24  7:52     ` [tip:x86/urgent] " tip-bot for Borislav Petkov
2018-04-24  7:51   ` [tip:x86/urgent] x86/microcode/intel: Save microcode patch unconditionally tip-bot for Borislav Petkov

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180419121840.GF3896@pd.tnic \
    --to=bp@suse.de \
    --cc=ashok.raj@intel.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=vitezslav@samel.cz \
    --subject='Re: 4.15.17 regression: bisected: timeout during microcode update' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.