From: James Morse <james.morse@arm.com>
To: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: jmorris@namei.org, sashal@kernel.org, ebiederm@xmission.com,
kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
corbet@lwn.net, catalin.marinas@arm.com, will@kernel.org,
linux-arm-kernel@lists.infradead.org, maz@kernel.org,
vladimir.murzin@arm.com, matthias.bgg@gmail.com,
bhsharma@redhat.com, linux-mm@kvack.org, mark.rutland@arm.com,
steve.capper@arm.com, rfontana@redhat.com, tglx@linutronix.de,
selindag@gmail.com
Subject: Re: [PATCH v9 05/18] arm64: trans_pgd: pass NULL instead of init_mm to *_populate functions
Date: Wed, 29 Apr 2020 18:01:11 +0100 [thread overview]
Message-ID: <d19f4bc5-ad5b-5dad-0d50-271817b6c9aa@arm.com> (raw)
In-Reply-To: <20200326032420.27220-6-pasha.tatashin@soleen.com>
Hi Pavel,
On 26/03/2020 03:24, Pavel Tatashin wrote:
> trans_pgd_* should be independent from mm context because the tables that
> are created by this code are used when there are no mm context around, as
> it is between kernels. Simply replace mm_init's with NULL.
arm64's p?d_populate() helpers don't use the mm parameter, so it doesn't make any
difference. This was originally done so that if we ever needed anything from the mm, we
didn't get a NULL dereference or EL0 behaviour due to a future '!= &init_mm'.
If you think it matters,
Acked-by: James Morse <james.morse@arm.com>
Thanks,
James
WARNING: multiple messages have this Message-ID (diff)
From: James Morse <james.morse@arm.com>
To: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: sashal@kernel.org, mark.rutland@arm.com, vladimir.murzin@arm.com,
corbet@lwn.net, catalin.marinas@arm.com, bhsharma@redhat.com,
steve.capper@arm.com, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org, jmorris@namei.org,
linux-mm@kvack.org, rfontana@redhat.com, ebiederm@xmission.com,
maz@kernel.org, matthias.bgg@gmail.com, tglx@linutronix.de,
will@kernel.org, selindag@gmail.com,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v9 05/18] arm64: trans_pgd: pass NULL instead of init_mm to *_populate functions
Date: Wed, 29 Apr 2020 18:01:11 +0100 [thread overview]
Message-ID: <d19f4bc5-ad5b-5dad-0d50-271817b6c9aa@arm.com> (raw)
In-Reply-To: <20200326032420.27220-6-pasha.tatashin@soleen.com>
Hi Pavel,
On 26/03/2020 03:24, Pavel Tatashin wrote:
> trans_pgd_* should be independent from mm context because the tables that
> are created by this code are used when there are no mm context around, as
> it is between kernels. Simply replace mm_init's with NULL.
arm64's p?d_populate() helpers don't use the mm parameter, so it doesn't make any
difference. This was originally done so that if we ever needed anything from the mm, we
didn't get a NULL dereference or EL0 behaviour due to a future '!= &init_mm'.
If you think it matters,
Acked-by: James Morse <james.morse@arm.com>
Thanks,
James
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: James Morse <james.morse@arm.com>
To: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: sashal@kernel.org, mark.rutland@arm.com, vladimir.murzin@arm.com,
corbet@lwn.net, catalin.marinas@arm.com, bhsharma@redhat.com,
steve.capper@arm.com, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org, jmorris@namei.org,
linux-mm@kvack.org, rfontana@redhat.com, ebiederm@xmission.com,
maz@kernel.org, matthias.bgg@gmail.com, tglx@linutronix.de,
will@kernel.org, selindag@gmail.com,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v9 05/18] arm64: trans_pgd: pass NULL instead of init_mm to *_populate functions
Date: Wed, 29 Apr 2020 18:01:11 +0100 [thread overview]
Message-ID: <d19f4bc5-ad5b-5dad-0d50-271817b6c9aa@arm.com> (raw)
In-Reply-To: <20200326032420.27220-6-pasha.tatashin@soleen.com>
Hi Pavel,
On 26/03/2020 03:24, Pavel Tatashin wrote:
> trans_pgd_* should be independent from mm context because the tables that
> are created by this code are used when there are no mm context around, as
> it is between kernels. Simply replace mm_init's with NULL.
arm64's p?d_populate() helpers don't use the mm parameter, so it doesn't make any
difference. This was originally done so that if we ever needed anything from the mm, we
didn't get a NULL dereference or EL0 behaviour due to a future '!= &init_mm'.
If you think it matters,
Acked-by: James Morse <james.morse@arm.com>
Thanks,
James
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
next prev parent reply other threads:[~2020-04-29 17:01 UTC|newest]
Thread overview: 126+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-26 3:24 [PATCH v9 00/18] arm64: MMU enabled kexec relocation Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 01/18] arm64: kexec: make dtb_mem always enabled Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-04-29 17:00 ` James Morse
2020-04-29 17:00 ` James Morse
2020-04-29 17:00 ` James Morse
2021-01-23 0:17 ` Pavel Tatashin
2021-01-23 0:17 ` Pavel Tatashin
2021-01-23 0:17 ` Pavel Tatashin
2021-01-23 0:17 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 02/18] arm64: hibernate: move page handling function to new trans_pgd.c Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-04-29 17:00 ` James Morse
2020-04-29 17:00 ` James Morse
2020-04-29 17:00 ` James Morse
2021-01-23 0:18 ` Pavel Tatashin
2021-01-23 0:18 ` Pavel Tatashin
2021-01-23 0:18 ` Pavel Tatashin
2021-01-23 0:18 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 03/18] arm64: trans_pgd: make trans_pgd_map_page generic Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2021-01-22 21:52 ` Pavel Tatashin
2021-01-22 21:52 ` Pavel Tatashin
2021-01-22 21:52 ` Pavel Tatashin
2021-01-22 21:52 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 04/18] arm64: trans_pgd: pass allocator trans_pgd_create_copy Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2021-01-23 0:20 ` Pavel Tatashin
2021-01-23 0:20 ` Pavel Tatashin
2021-01-23 0:20 ` Pavel Tatashin
2021-01-23 0:20 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 05/18] arm64: trans_pgd: pass NULL instead of init_mm to *_populate functions Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-04-29 17:01 ` James Morse [this message]
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2021-01-23 0:22 ` Pavel Tatashin
2021-01-23 0:22 ` Pavel Tatashin
2021-01-23 0:22 ` Pavel Tatashin
2021-01-23 0:22 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 06/18] arm64: mm: Always update TCR_EL1 from __cpu_set_tcr_t0sz() Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 07/18] arm64: trans_pgd: hibernate: idmap the single page that holds the copy page routines Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2021-01-23 0:35 ` Pavel Tatashin
2021-01-23 0:35 ` Pavel Tatashin
2021-01-23 0:35 ` Pavel Tatashin
2021-01-23 0:35 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 08/18] arm64: kexec: move relocation function setup Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2021-01-23 1:01 ` Pavel Tatashin
2021-01-23 1:01 ` Pavel Tatashin
2021-01-23 1:01 ` Pavel Tatashin
2021-01-23 1:01 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 09/18] arm64: kexec: call kexec_image_info only once Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2020-03-26 3:24 ` [PATCH v9 10/18] arm64: kexec: cpu_soft_restart change argument types Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2020-04-29 17:01 ` James Morse
2021-01-23 1:14 ` Pavel Tatashin
2021-01-23 1:14 ` Pavel Tatashin
2021-01-23 1:14 ` Pavel Tatashin
2021-01-23 1:14 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 11/18] arm64: kexec: arm64_relocate_new_kernel clean-ups Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-05-07 16:22 ` James Morse
2020-05-07 16:22 ` James Morse
2020-05-07 16:22 ` James Morse
2020-03-26 3:24 ` [PATCH v9 12/18] arm64: kexec: arm64_relocate_new_kernel don't use x0 as temp Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-05-07 16:22 ` James Morse
2020-05-07 16:22 ` James Morse
2020-05-07 16:22 ` James Morse
2020-03-26 3:24 ` [PATCH v9 13/18] arm64: kexec: add expandable argument to relocation function Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-05-07 16:22 ` James Morse
2020-05-07 16:22 ` James Morse
2020-05-07 16:22 ` James Morse
2021-01-23 2:49 ` Pavel Tatashin
2021-01-23 2:49 ` Pavel Tatashin
2021-01-23 2:49 ` Pavel Tatashin
2021-01-23 2:49 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 14/18] arm64: kexec: offset for " Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-05-07 16:22 ` James Morse
2020-05-07 16:22 ` James Morse
2020-05-07 16:22 ` James Morse
2020-03-26 3:24 ` [PATCH v9 15/18] arm64: kexec: kexec EL2 vectors Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-04-29 17:35 ` Marc Zyngier
2020-04-29 17:35 ` Marc Zyngier
2020-04-29 17:35 ` Marc Zyngier
2021-01-25 19:07 ` Pavel Tatashin
2021-01-25 19:07 ` Pavel Tatashin
2021-01-25 19:07 ` Pavel Tatashin
2021-01-25 19:07 ` Pavel Tatashin
2020-05-07 16:21 ` James Morse
2020-05-07 16:21 ` James Morse
2020-05-07 16:21 ` James Morse
2020-03-26 3:24 ` [PATCH v9 16/18] arm64: kexec: configure trans_pgd page table for kexec Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-05-07 16:22 ` James Morse
2020-05-07 16:22 ` James Morse
2020-05-07 16:22 ` James Morse
2020-03-26 3:24 ` [PATCH v9 17/18] arm64: kexec: enable MMU during kexec relocation Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
2020-03-26 3:24 ` [PATCH v9 18/18] arm64: kexec: remove head from relocation argument Pavel Tatashin
2020-03-26 3:24 ` Pavel Tatashin
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