From: Pasha Tatashin <pasha.tatashin@soleen.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morris <jmorris@namei.org>, Sasha Levin <sashal@kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
kexec mailing list <kexec@lists.infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
Jonathan Corbet <corbet@lwn.net>, Will Deacon <will@kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
Vladimir Murzin <vladimir.murzin@arm.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
linux-mm <linux-mm@kvack.org>,
Mark Rutland <mark.rutland@arm.com>,
steve.capper@arm.com, rfontana@redhat.com,
Thomas Gleixner <tglx@linutronix.de>,
Selin Dag <selindag@gmail.com>,
Tyler Hicks <tyhicks@linux.microsoft.com>,
Pingfan Liu <kernelfans@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
madvenka@linux.microsoft.com
Subject: Re: [PATCH v17 15/15] arm64: trans_pgd: remove trans_pgd_map_page()
Date: Thu, 30 Sep 2021 00:12:28 -0400 [thread overview]
Message-ID: <CA+CK2bA4LXSqRNDhen0GVVTz=gYwLmr8FgKCJeyG3iRpy=ULSA@mail.gmail.com> (raw)
In-Reply-To: <YVSXtswhm6iTC3yz@arm.com>
On Wed, Sep 29, 2021 at 12:43 PM Catalin Marinas
<catalin.marinas@arm.com> wrote:
>
> On Thu, Sep 16, 2021 at 07:13:25PM -0400, Pasha Tatashin wrote:
> > The intend of trans_pgd_map_page() was to map contiguous range of VA
> > memory to the memory that is getting relocated during kexec. However,
> > since we are now using linear map instead of contiguous range this
> > function is not needed
> >
> > Suggested-by: Pingfan Liu <kernelfans@gmail.com>
> > Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
> > ---
> > arch/arm64/include/asm/trans_pgd.h | 5 +--
> > arch/arm64/mm/trans_pgd.c | 57 ------------------------------
> > 2 files changed, 1 insertion(+), 61 deletions(-)
> >
> > diff --git a/arch/arm64/include/asm/trans_pgd.h b/arch/arm64/include/asm/trans_pgd.h
> > index 7b04d32b102c..033d400a4ea4 100644
> > --- a/arch/arm64/include/asm/trans_pgd.h
> > +++ b/arch/arm64/include/asm/trans_pgd.h
> > @@ -15,7 +15,7 @@
> > /*
> > * trans_alloc_page
> > * - Allocator that should return exactly one zeroed page, if this
> > - * allocator fails, trans_pgd_create_copy() and trans_pgd_map_page()
> > + * allocator fails, trans_pgd_create_copy() and trans_pgd_idmap_page()
> > * return -ENOMEM error.
> > *
> > * trans_alloc_arg
> > @@ -30,9 +30,6 @@ struct trans_pgd_info {
> > int trans_pgd_create_copy(struct trans_pgd_info *info, pgd_t **trans_pgd,
> > unsigned long start, unsigned long end);
> >
> > -int trans_pgd_map_page(struct trans_pgd_info *info, pgd_t *trans_pgd,
> > - void *page, unsigned long dst_addr, pgprot_t pgprot);
>
> So this function never got used in mainline after commit 7018d467ff2d
> ("arm64: trans_pgd: hibernate: idmap the single page that holds the copy
> page routines"). I guess it's because we merged part of v10 of this
> series and in v12 you dropped the contiguous VA range in favour of a
> copy of the linear map.
This is exactly right. This function was meant for the contiguous-va
relocation version of this series.
Pasha
next prev parent reply other threads:[~2021-09-30 4:13 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-16 23:13 [PATCH v17 00/15] arm64: MMU enabled kexec relocation Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 01/15] arm64: kernel: add helper for booted at EL2 and not VHE Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 02/15] arm64: trans_pgd: hibernate: Add trans_pgd_copy_el2_vectors Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 03/15] arm64: hibernate: abstract ttrb0 setup function Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 04/15] arm64: kexec: flush image and lists during kexec load time Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 05/15] arm64: kexec: skip relocation code for inplace kexec Pasha Tatashin
2021-09-29 12:13 ` Will Deacon
2021-09-30 2:44 ` Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 06/15] arm64: kexec: Use dcache ops macros instead of open-coding Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 07/15] arm64: kexec: pass kimage as the only argument to relocation function Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 08/15] arm64: kexec: configure EL2 vectors for kexec Pasha Tatashin
2021-09-29 12:35 ` Will Deacon
2021-09-30 3:54 ` Pasha Tatashin
2021-09-30 8:16 ` Will Deacon
2021-09-30 11:59 ` Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 09/15] arm64: kexec: relocate in EL1 mode Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 10/15] arm64: kexec: use ld script for relocation function Pasha Tatashin
2021-09-29 12:45 ` Will Deacon
2021-09-30 3:57 ` Pasha Tatashin
2021-09-30 4:08 ` Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 11/15] arm64: kexec: install a copy of the linear-map Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 12/15] arm64: kexec: keep MMU enabled during kexec relocation Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 13/15] arm64: kexec: remove the pre-kexec PoC maintenance Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 14/15] arm64: kexec: remove cpu-reset.h Pasha Tatashin
2021-09-16 23:13 ` [PATCH v17 15/15] arm64: trans_pgd: remove trans_pgd_map_page() Pasha Tatashin
2021-09-29 16:43 ` Catalin Marinas
2021-09-30 4:12 ` Pasha Tatashin [this message]
2021-09-29 12:49 ` [PATCH v17 00/15] arm64: MMU enabled kexec relocation Will Deacon
2021-09-30 4:13 ` Pasha Tatashin
2021-09-29 17:21 ` Catalin Marinas
2021-09-30 4:13 ` Pasha Tatashin
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