Re: port-amd64/54489: panic: assertion "rcr4() & CR4_SMAP" failed on HP DL380 Gen10

[Takahiro Kambe <taca%back-street.net@localhost>]

The following reply was made to PR port-amd64/54489; it has been noted by GNATS.

From: Takahiro Kambe <taca%back-street.net@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: port-amd64/54489: panic: assertion "rcr4() & CR4_SMAP" failed
 on HP DL380 Gen10
Date: Thu, 13 Aug 2020 00:03:14 +0900 (JST)

 Hi,
 
 In message <20190826151500.50B6F7A1DC%mollari.NetBSD.org@localhost>
 	on Mon, 26 Aug 2019 15:15:00 +0000 (UTC),
 	tnn%nygren.pp.se@localhost wrote:
 >>Number:         54489
 >>Category:       port-amd64
 >>Synopsis:       panic: assertion "rcr4() & CR4_SMAP" failed on HP DL380 Gen10
 >>Confidential:   no
 >>Severity:       serious
 >>Priority:       medium
 >>Responsible:    port-amd64-maintainer
 >>State:          open
 >>Class:          sw-bug
 >>Submitter-Id:   net
 >>Arrival-Date:   Mon Aug 26 15:15:00 +0000 2019
 >>Originator:     Tobias Nygren
 >>Release:        9.99.10
 I met the same problem with a machine at my office.
 
 HPE Proliant MicroServer Gen10 Plus
 
 Release 9.99.70 and I have several photo of screen.
 
 >>Description:
 > Tried to boot a -current GENERIC kernel on a dual socket HP DL380 Gen10.
 > 
 > It failed with assertion "rcr4() & CR4_SMAP" at arch/x86/x86/patch.c line 299 during multiprocessor hatch.
 The same failure.
 
 > The machine has:
 > Slot 0: 16 core "Intel(R) Xeon(R) Gold 6130 CPU 2 2.10GHz"  
 > Slot 1: 16 core "Intel(R) Xeon(R) Gold 6130 CPU 2 2.10GHz"  
 > Memory: 384 GB RAM.
 Intel(R) Xeon (R) E-23224 CPU @ 3.40GHz
 Memory: 16GB
 
 > I tried to #if 0 the SMAP code but then the kernel asserted later with "ci->ci_tlbstate != TLBSTATE_VALID" in x86/pmap.c line 2792.
 I've confirmed the same situation.
 
 > State-Changed-From-To: open->feedback
 > State-Changed-By: maxv%NetBSD.org@localhost
 > State-Changed-When: Tue, 29 Oct 2019 10:20:06 +0000
 > State-Changed-Why:
 > On which CPU does the SMAP KASSERT fire?
 "cpu0" in my case.
 
 -- 
 Takahiro Kambe <taca%back-street.net@localhost>