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Re: CVS commit: src/sys/arch

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  Re: CVS commit: src/sys/arch Ryo ONODERA <ryo@tetera.org> - 2026-07-03 12:26 +0900
    Re: CVS commit: src/sys/arch Taylor R Campbell <riastradh@NetBSD.org> - 2026-07-03 03:36 +0000

#156197 — Re: CVS commit: src/sys/arch

Hi,

With this change, my HP Envy 14 gets crash during boot.
I cannot get the message yet.

I have `no options PCI_RESOURCE` in my kernel config file
and my kernel does not crash anymore on HP Envy 14.

Is this change really safe for any machines?

Thank you.


"Taylor R Campbell" <riastradh@netbsd.org> writes:

> Module Name:	src
> Committed By:	riastradh
> Date:		Thu Jul  2 17:56:50 UTC 2026
>
> Modified Files:
> 	src/sys/arch/amd64/conf: GENERIC
> 	src/sys/arch/i386/conf: GENERIC
>
> Log Message:
> x86/GENERIC: Enable PCI_RESOURCE.
>
> Has been needed for motherboards that are already several years old
> by now, which require the OS to allocate PCI memory regions for some
> devices like iwm(4); let's get some experience with having it on by
> default.
>
> PR port-amd64/59118: Thinkpad T495s - iwm PCI BAR is zero
>
>
> To generate a diff of this commit:
> cvs rdiff -u -r1.621 -r1.622 src/sys/arch/amd64/conf/GENERIC
> cvs rdiff -u -r1.1262 -r1.1263 src/sys/arch/i386/conf/GENERIC
>
> Please note that diffs are not public domain; they are subject to the
> copyright notices on the relevant files.
>
> Modified files:
>
> Index: src/sys/arch/amd64/conf/GENERIC
> diff -u src/sys/arch/amd64/conf/GENERIC:1.621 src/sys/arch/amd64/conf/GENERIC:1.622
> --- src/sys/arch/amd64/conf/GENERIC:1.621	Fri Feb 20 07:54:26 2026
> +++ src/sys/arch/amd64/conf/GENERIC	Thu Jul  2 17:56:49 2026
> @@ -1,4 +1,4 @@
> -# $NetBSD: GENERIC,v 1.621 2026/02/20 07:54:26 yamt Exp $
> +# $NetBSD: GENERIC,v 1.622 2026/07/02 17:56:49 riastradh Exp $
>  #
>  # GENERIC machine description file
>  #
> @@ -22,7 +22,7 @@ include 	"arch/amd64/conf/std.amd64"
>  
>  options 	INCLUDE_CONFIG_FILE	# embed config file in kernel binary
>  
> -#ident		"GENERIC-$Revision: 1.621 $"
> +#ident		"GENERIC-$Revision: 1.622 $"
>  
>  maxusers	64		# estimated number of users
>  
> @@ -320,7 +320,7 @@ acpi0		at mainbus0
>  options 	ACPI_SCANPCI		# find PCI roots using ACPI
>  options 	MPBIOS			# configure CPUs and APICs using MPBIOS
>  options 	MPBIOS_SCANPCI		# MPBIOS configures PCI roots
> -#options 	PCI_RESOURCE		# Allocate unconfigured PCI resources
> +options 	PCI_RESOURCE		# Allocate unconfigured PCI resources
>  #options 	PCI_INTR_FIXUP		# fixup PCI interrupt routing via ACPI
>  #options 	PCI_BUS_FIXUP		# fixup PCI bus numbering
>  #options 	PCI_ADDR_FIXUP		# fixup PCI I/O addresses
>
> Index: src/sys/arch/i386/conf/GENERIC
> diff -u src/sys/arch/i386/conf/GENERIC:1.1262 src/sys/arch/i386/conf/GENERIC:1.1263
> --- src/sys/arch/i386/conf/GENERIC:1.1262	Fri Feb 20 07:54:26 2026
> +++ src/sys/arch/i386/conf/GENERIC	Thu Jul  2 17:56:49 2026
> @@ -1,4 +1,4 @@
> -# $NetBSD: GENERIC,v 1.1262 2026/02/20 07:54:26 yamt Exp $
> +# $NetBSD: GENERIC,v 1.1263 2026/07/02 17:56:49 riastradh Exp $
>  #
>  # GENERIC machine description file
>  #
> @@ -22,7 +22,7 @@ include 	"arch/i386/conf/std.i386"
>  
>  options 	INCLUDE_CONFIG_FILE	# embed config file in kernel binary
>  
> -#ident		"GENERIC-$Revision: 1.1262 $"
> +#ident		"GENERIC-$Revision: 1.1263 $"
>  
>  maxusers	64		# estimated number of users
>  
> @@ -414,7 +414,7 @@ pci*	at elansc? bus ?
>  					# on anything else.
>  #options 	PCIINTR_DEBUG		# super-verbose PCI interrupt fixup
>  
> -#options 	PCI_RESOURCE		# Allocate unconfigured PCI resources
> +options 	PCI_RESOURCE		# Allocate unconfigured PCI resources
>  
>  # PCI fixups, for both PCIBIOS and ACPI
>  #options 	PCI_ADDR_FIXUP		# fixup PCI I/O addresses
>

-- 
Ryo ONODERA // ryo@tetera.org
PGP fingerprint = 82A2 DC91 76E0 A10A 8ABB  FD1B F404 27FA C7D1 15F3

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#156198

> Date: Fri, 03 Jul 2026 12:26:49 +0900
> From: Ryo ONODERA <ryo@tetera.org>
> 
> With this change, my HP Envy 14 gets crash during boot.
> I cannot get the message yet.
> 
> I have `no options PCI_RESOURCE` in my kernel config file
> and my kernel does not crash anymore on HP Envy 14.
> 
> Is this change really safe for any machines?

Possibly not -- this is a high-risk change!  But it is increasingly
needed for modern hardware.  I figured we should try turning it on
well before the next branch so we can iron out any issues with it on a
variety of real hardware.

We have had this on evbarm GENERIC64 for some time, but obviously
there's a lot of variation between machines and I already had to fix a
few issues with it on x86 last year.

Can you share dmesg for your machine, without PCI_RESOURCE?  Can you
also share `acpidump -dt' output?

And can you describe how it crashes -- does it just give a blank
screen, or does it panic during boot with a message you can
photograph, or what?  Do you by any chance have serial console access
(maybe via Intel AMT)?

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