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From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Zev Weiss <zev@bewilderbeest.net>
Cc: linux-parisc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Helge Deller <deller@gmx.de>,
	Florent Revest <revest@chromium.org>,
	"James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
	"Borislav Petkov (AMD)" <bp@alien8.de>,
	Yin Fengwei <fengwei.yin@intel.com>,
	"Mike Rapoport (IBM)" <rppt@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Kees Cook <keescook@chromium.org>,
	Yang Shi <yang@os.amperecomputing.com>,
	Rick Edgecombe <rick.p.edgecombe@intel.com>,
	Oleg Nesterov <oleg@redhat.com>,
	David Hildenbrand <david@redhat.com>,
	Stefan Roesch <shr@devkernel.io>,
	Josh Triplett <josh@joshtriplett.org>,
	Ondrej Mosnacek <omosnace@redhat.com>,
	Miguel Ojeda <ojeda@kernel.org>,
	linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org,
	Sam James <sam@gentoo.org>,
	stable@vger.kernel.org
Subject: Re: [PATCH RESEND 1/2] prctl: Generalize PR_SET_MDWE support check to be per-arch
Date: Tue, 27 Feb 2024 10:24:40 +0000	[thread overview]
Message-ID: <Zd24aCps4xD28c74@shell.armlinux.org.uk> (raw)
In-Reply-To: <20240227013546.15769-5-zev@bewilderbeest.net>

On Mon, Feb 26, 2024 at 05:35:41PM -0800, Zev Weiss wrote:
> There exist systems other than PARISC where MDWE may not be feasible
> to support; rather than cluttering up the generic code with additional
> arch-specific logic let's add a generic function for checking MDWE
> support and allow each arch to override it as needed.
> 
> Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
> Cc: <stable@vger.kernel.org> # v6.3+

PA-RISC folk need to ack/review-by this patch. Alternatively, it needs
to be restructured to add the arch_memory_deny_write_exec_supported()
override without touching the PA-RISC code, which then makes the Arm
patch independent of the status of the PA-RISC patch. That will allow
the Arm issue to be solved even if an ack is not forthcoming for the
PA-RISC parts.

Alternatively, I wonder whether akpm would be willing to pick up this
patch set as-is.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

WARNING: multiple messages have this Message-ID (diff)
From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Zev Weiss <zev@bewilderbeest.net>
Cc: David Hildenbrand <david@redhat.com>,
	linux-kernel@vger.kernel.org,
	"James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
	Helge Deller <deller@gmx.de>, Miguel Ojeda <ojeda@kernel.org>,
	Florent Revest <revest@chromium.org>,
	Kees Cook <keescook@chromium.org>,
	Stefan Roesch <shr@devkernel.io>, Sam James <sam@gentoo.org>,
	Josh Triplett <josh@joshtriplett.org>,
	"Borislav Petkov \(AMD\)" <bp@alien8.de>,
	Oleg Nesterov <oleg@redhat.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-parisc@vger.kernel.org, Yin Fengwei <fengwei.yin@intel.com>,
	Ondrej Mosnacek <omosnace@redhat.com>,
	stable@vger.kernel.org, Yang Shi <yang@os.amperecomputing.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Rick Edgecombe <rick.p.edgecombe@intel.com>,
	openbmc@lists.ozlabs.org,
	"Mike Rapoport \(IBM\)" <rppt@kernel.org>
Subject: Re: [PATCH RESEND 1/2] prctl: Generalize PR_SET_MDWE support check to be per-arch
Date: Tue, 27 Feb 2024 10:24:40 +0000	[thread overview]
Message-ID: <Zd24aCps4xD28c74@shell.armlinux.org.uk> (raw)
In-Reply-To: <20240227013546.15769-5-zev@bewilderbeest.net>

On Mon, Feb 26, 2024 at 05:35:41PM -0800, Zev Weiss wrote:
> There exist systems other than PARISC where MDWE may not be feasible
> to support; rather than cluttering up the generic code with additional
> arch-specific logic let's add a generic function for checking MDWE
> support and allow each arch to override it as needed.
> 
> Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
> Cc: <stable@vger.kernel.org> # v6.3+

PA-RISC folk need to ack/review-by this patch. Alternatively, it needs
to be restructured to add the arch_memory_deny_write_exec_supported()
override without touching the PA-RISC code, which then makes the Arm
patch independent of the status of the PA-RISC patch. That will allow
the Arm issue to be solved even if an ack is not forthcoming for the
PA-RISC parts.

Alternatively, I wonder whether akpm would be willing to pick up this
patch set as-is.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

WARNING: multiple messages have this Message-ID (diff)
From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Zev Weiss <zev@bewilderbeest.net>
Cc: linux-parisc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Helge Deller <deller@gmx.de>,
	Florent Revest <revest@chromium.org>,
	"James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
	"Borislav Petkov (AMD)" <bp@alien8.de>,
	Yin Fengwei <fengwei.yin@intel.com>,
	"Mike Rapoport (IBM)" <rppt@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Kees Cook <keescook@chromium.org>,
	Yang Shi <yang@os.amperecomputing.com>,
	Rick Edgecombe <rick.p.edgecombe@intel.com>,
	Oleg Nesterov <oleg@redhat.com>,
	David Hildenbrand <david@redhat.com>,
	Stefan Roesch <shr@devkernel.io>,
	Josh Triplett <josh@joshtriplett.org>,
	Ondrej Mosnacek <omosnace@redhat.com>,
	Miguel Ojeda <ojeda@kernel.org>,
	linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org,
	Sam James <sam@gentoo.org>,
	stable@vger.kernel.org
Subject: Re: [PATCH RESEND 1/2] prctl: Generalize PR_SET_MDWE support check to be per-arch
Date: Tue, 27 Feb 2024 10:24:40 +0000	[thread overview]
Message-ID: <Zd24aCps4xD28c74@shell.armlinux.org.uk> (raw)
In-Reply-To: <20240227013546.15769-5-zev@bewilderbeest.net>

On Mon, Feb 26, 2024 at 05:35:41PM -0800, Zev Weiss wrote:
> There exist systems other than PARISC where MDWE may not be feasible
> to support; rather than cluttering up the generic code with additional
> arch-specific logic let's add a generic function for checking MDWE
> support and allow each arch to override it as needed.
> 
> Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
> Cc: <stable@vger.kernel.org> # v6.3+

PA-RISC folk need to ack/review-by this patch. Alternatively, it needs
to be restructured to add the arch_memory_deny_write_exec_supported()
override without touching the PA-RISC code, which then makes the Arm
patch independent of the status of the PA-RISC patch. That will allow
the Arm issue to be solved even if an ack is not forthcoming for the
PA-RISC parts.

Alternatively, I wonder whether akpm would be willing to pick up this
patch set as-is.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2024-02-27 10:24 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-27  1:35 [PATCH RESEND 0/2] ARM: prctl: Reject PR_SET_MDWE where not supported Zev Weiss
2024-02-27  1:35 ` Zev Weiss
2024-02-27  1:35 ` Zev Weiss
2024-02-27  1:35 ` [PATCH RESEND 1/2] prctl: Generalize PR_SET_MDWE support check to be per-arch Zev Weiss
2024-02-27  1:35   ` Zev Weiss
2024-02-27  1:35   ` Zev Weiss
2024-02-27 10:24   ` Russell King (Oracle) [this message]
2024-02-27 10:24     ` Russell King (Oracle)
2024-02-27 10:24     ` Russell King (Oracle)
2024-02-27 19:53     ` Helge Deller
2024-02-27 19:53       ` Helge Deller
2024-02-27 19:53       ` Helge Deller
2024-03-19 17:37       ` Zev Weiss
2024-03-19 17:37         ` Zev Weiss
2024-03-19 17:37         ` Zev Weiss
2024-02-27  1:35 ` [PATCH RESEND 2/2] ARM: prctl: Reject PR_SET_MDWE on pre-ARMv6 Zev Weiss
2024-02-27  1:35   ` Zev Weiss
2024-02-27  1:35   ` Zev Weiss

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