History log of /openbmc/linux/arch/x86/mm/ident_map.c (Results 1 – 25 of 152)
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# 360823a0 17-Feb-2025 Andrew Jeffery <andrew@codeconstruct.com.au>

Merge tag 'v6.6.78' into for/openbmc/dev-6.6

This is the 6.6.78 stable release

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Merge tag 'v6.6.78' into for/openbmc/dev-6.6

This is the 6.6.78 stable release

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# gpg: Signature made Mon 17 Feb 2025 19:10:53 ACDT
# gpg: using RSA key 647F28654894E3BD457199BE38DBBDC86092693E
# gpg: Good signature from "Greg Kroah-Hartman <gregkh@kernel.org>" [marginal]
# gpg: gregkh@kernel.org: Verified 7 signatures in the past 3 weeks. Encrypted
# 0 messages.
# gpg: Warning: you have yet to encrypt a message to this key!
# gpg: Warning: if you think you've seen more signatures by this key and user
# id, then this key might be a forgery! Carefully examine the email address
# for small variations. If the key is suspect, then use
# gpg --tofu-policy bad 647F28654894E3BD457199BE38DBBDC86092693E
# to mark it as being bad.
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 647F 2865 4894 E3BD 4571 99BE 38DB BDC8 6092 693E

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Revision tags: v6.6.78, v6.6.77, v6.6.76, v6.6.75, v6.6.74, v6.6.73, v6.6.72, v6.6.71, v6.12.9, v6.6.70, v6.12.8, v6.6.69, v6.12.7, v6.6.68, v6.12.6, v6.6.67, v6.12.5, v6.6.66, v6.6.65, v6.12.4, v6.6.64, v6.12.3, v6.12.2, v6.6.63, v6.12.1, v6.12, v6.6.62, v6.6.61, v6.6.60, v6.6.59, v6.6.58, v6.6.57, v6.6.56, v6.6.55, v6.6.54, v6.6.53, v6.6.52, v6.6.51, v6.6.50, v6.6.49, v6.6.48, v6.6.47, v6.6.46, v6.6.45, v6.6.44, v6.6.43, v6.6.42, v6.6.41
# d113f972 17-Jul-2024 Steve Wahl <steve.wahl@hpe.com>

x86/mm/ident_map: Use gbpages only where full GB page should be mapped.

commit cc31744a294584a36bf764a0ffa3255a8e69f036 upstream.

When ident_pud_init() uses only GB pages to create identity maps, l

x86/mm/ident_map: Use gbpages only where full GB page should be mapped.

commit cc31744a294584a36bf764a0ffa3255a8e69f036 upstream.

When ident_pud_init() uses only GB pages to create identity maps, large
ranges of addresses not actually requested can be included in the resulting
table; a 4K request will map a full GB. This can include a lot of extra
address space past that requested, including areas marked reserved by the
BIOS. That allows processor speculation into reserved regions, that on UV
systems can cause system halts.

Only use GB pages when map creation requests include the full GB page of
space. Fall back to using smaller 2M pages when only portions of a GB page
are included in the request.

No attempt is made to coalesce mapping requests. If a request requires a
map entry at the 2M (pmd) level, subsequent mapping requests within the
same 1G region will also be at the pmd level, even if adjacent or
overlapping such requests could have been combined to map a full GB page.
Existing usage starts with larger regions and then adds smaller regions, so
this should not have any great consequence.

Signed-off-by: Steve Wahl <steve.wahl@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Pavin Joseph <me@pavinjoseph.com>
Tested-by: Sarah Brofeldt <srhb@dbc.dk>
Tested-by: Eric Hagberg <ehagberg@gmail.com>
Link: https://lore.kernel.org/all/20240717213121.3064030-3-steve.wahl@hpe.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...


# 278002ed 15-Dec-2024 Andrew Jeffery <andrew@codeconstruct.com.au>

Merge tag 'v6.6.66' into for/openbmc/dev-6.6

This is the 6.6.66 stable release


# af3fde61 04-Dec-2024 David Woodhouse <dwmw@amazon.co.uk>

x86/mm: Add _PAGE_NOPTISHADOW bit to avoid updating userspace page tables

commit d0ceea662d459726487030237689835fcc0483e5 upstream.

The set_p4d() and set_pgd() functions (in 4-level or 5-level page

x86/mm: Add _PAGE_NOPTISHADOW bit to avoid updating userspace page tables

commit d0ceea662d459726487030237689835fcc0483e5 upstream.

The set_p4d() and set_pgd() functions (in 4-level or 5-level page table setups
respectively) assume that the root page table is actually a 8KiB allocation,
with the userspace root immediately after the kernel root page table (so that
the former can enforce NX on on all the subordinate page tables, which are
actually shared).

However, users of the kernel_ident_mapping_init() code do not give it an 8KiB
allocation for its PGD. Both swsusp_arch_resume() and acpi_mp_setup_reset()
allocate only a single 4KiB page. The kexec code on x86_64 currently gets
away with it purely by chance, because it allocates 8KiB for its "control
code page" and then actually uses the first half for the PGD, then copies the
actual trampoline code into the second half only after the identmap code has
finished scribbling over it.

Fix this by defining a _PAGE_NOPTISHADOW bit (which can use the same bit as
_PAGE_SAVED_DIRTY since one is only for the PGD/P4D root and the other is
exclusively for leaf PTEs.). This instructs __pti_set_user_pgtbl() not to
write to the userspace 'shadow' PGD.

Strictly, the _PAGE_NOPTISHADOW bit doesn't need to be written out to the
actual page tables; since __pti_set_user_pgtbl() returns the value to be
written to the kernel page table, it could be filtered out. But there seems
to be no benefit to actually doing so.

Suggested-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/412c90a4df7aef077141d9f68d19cbe5602d6c6d.camel@infradead.org
Cc: stable@kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Revision tags: v6.6.40, v6.6.39, v6.6.38, v6.6.37, v6.6.36, v6.6.35, v6.6.34, v6.6.33, v6.6.32, v6.6.31, v6.6.30, v6.6.29, v6.6.28, v6.6.27
# 86aa961b 10-Apr-2024 Andrew Jeffery <andrew@codeconstruct.com.au>

Merge tag 'v6.6.26' into dev-6.6

This is the 6.6.26 stable release


Revision tags: v6.6.26, v6.6.25, v6.6.24, v6.6.23
# fbc0a833 25-Mar-2024 Ingo Molnar <mingo@kernel.org>

Revert "x86/mm/ident_map: Use gbpages only where full GB page should be mapped."

[ Upstream commit c567f2948f57bdc03ed03403ae0234085f376b7d ]

This reverts commit d794734c9bbfe22f86686dc2909c25f5ffe

Revert "x86/mm/ident_map: Use gbpages only where full GB page should be mapped."

[ Upstream commit c567f2948f57bdc03ed03403ae0234085f376b7d ]

This reverts commit d794734c9bbfe22f86686dc2909c25f5ffe1a572.

While the original change tries to fix a bug, it also unintentionally broke
existing systems, see the regressions reported at:

https://lore.kernel.org/all/3a1b9909-45ac-4f97-ad68-d16ef1ce99db@pavinjoseph.com/

Since d794734c9bbf was also marked for -stable, let's back it out before
causing more damage.

Note that due to another upstream change the revert was not 100% automatic:

0a845e0f6348 mm/treewide: replace pud_large() with pud_leaf()

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: <stable@vger.kernel.org>
Cc: Russ Anderson <rja@hpe.com>
Cc: Steve Wahl <steve.wahl@hpe.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/3a1b9909-45ac-4f97-ad68-d16ef1ce99db@pavinjoseph.com/
Fixes: d794734c9bbf ("x86/mm/ident_map: Use gbpages only where full GB page should be mapped.")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...


# 907835e6 04-Mar-2024 Peter Xu <peterx@redhat.com>

mm/treewide: replace pud_large() with pud_leaf()

[ Upstream commit 0a845e0f6348ccfa2dcc8c450ffd1c9ffe8c4add ]

pud_large() is always defined as pud_leaf(). Merge their usages. Chose
pud_leaf() bec

mm/treewide: replace pud_large() with pud_leaf()

[ Upstream commit 0a845e0f6348ccfa2dcc8c450ffd1c9ffe8c4add ]

pud_large() is always defined as pud_leaf(). Merge their usages. Chose
pud_leaf() because pud_leaf() is a global API, while pud_large() is not.

Link: https://lkml.kernel.org/r/20240305043750.93762-9-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: "Naveen N. Rao" <naveen.n.rao@linux.ibm.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Stable-dep-of: c567f2948f57 ("Revert "x86/mm/ident_map: Use gbpages only where full GB page should be mapped."")
Signed-off-by: Sasha Levin <sashal@kernel.org>

show more ...


# c595db6d 13-Mar-2024 Andrew Jeffery <andrew@codeconstruct.com.au>

Merge tag 'v6.6.18' into dev-6.6

This is the 6.6.18 stable release


Revision tags: v6.6.16, v6.6.15
# 1dc09ca8 26-Jan-2024 Steve Wahl <steve.wahl@hpe.com>

x86/mm/ident_map: Use gbpages only where full GB page should be mapped.

commit d794734c9bbfe22f86686dc2909c25f5ffe1a572 upstream.

When ident_pud_init() uses only gbpages to create identity maps, la

x86/mm/ident_map: Use gbpages only where full GB page should be mapped.

commit d794734c9bbfe22f86686dc2909c25f5ffe1a572 upstream.

When ident_pud_init() uses only gbpages to create identity maps, large
ranges of addresses not actually requested can be included in the
resulting table; a 4K request will map a full GB. On UV systems, this
ends up including regions that will cause hardware to halt the system
if accessed (these are marked "reserved" by BIOS). Even processor
speculation into these regions is enough to trigger the system halt.

Only use gbpages when map creation requests include the full GB page
of space. Fall back to using smaller 2M pages when only portions of a
GB page are included in the request.

No attempt is made to coalesce mapping requests. If a request requires
a map entry at the 2M (pmd) level, subsequent mapping requests within
the same 1G region will also be at the pmd level, even if adjacent or
overlapping such requests could have been combined to map a full
gbpage. Existing usage starts with larger regions and then adds
smaller regions, so this should not have any great consequence.

[ dhansen: fix up comment formatting, simplifty changelog ]

Signed-off-by: Steve Wahl <steve.wahl@hpe.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20240126164841.170866-1-steve.wahl%40hpe.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

show more ...


Revision tags: v6.6.14, v6.6.13, v6.6.12, v6.6.11, v6.6.10, v6.6.9, v6.6.8, v6.6.7, v6.6.6, v6.6.5, v6.6.4, v6.6.3, v6.6.2, v6.5.11, v6.6.1, v6.5.10, v6.6, v6.5.9, v6.5.8, v6.5.7, v6.5.6, v6.5.5, v6.5.4, v6.5.3, v6.5.2, v6.1.51, v6.5.1, v6.1.50, v6.5, v6.1.49, v6.1.48, v6.1.46, v6.1.45, v6.1.44, v6.1.43, v6.1.42, v6.1.41, v6.1.40, v6.1.39, v6.1.38, v6.1.37, v6.1.36, v6.4, v6.1.35, v6.1.34, v6.1.33, v6.1.32, v6.1.31, v6.1.30, v6.1.29, v6.1.28, v6.1.27, v6.1.26, v6.3, v6.1.25, v6.1.24, v6.1.23, v6.1.22, v6.1.21, v6.1.20, v6.1.19, v6.1.18, v6.1.17, v6.1.16, v6.1.15, v6.1.14, v6.1.13, v6.2, v6.1.12, v6.1.11, v6.1.10, v6.1.9, v6.1.8, v6.1.7, v6.1.6, v6.1.5, v6.0.19, v6.0.18, v6.1.4, v6.1.3, v6.0.17, v6.1.2, v6.0.16, v6.1.1, v6.0.15, v6.0.14, v6.0.13, v6.1, v6.0.12, v6.0.11, v6.0.10, v5.15.80, v6.0.9, v5.15.79, v6.0.8, v5.15.78, v6.0.7, v5.15.77, v5.15.76, v6.0.6, v6.0.5, v5.15.75, v6.0.4, v6.0.3, v6.0.2, v5.15.74, v5.15.73, v6.0.1, v5.15.72, v6.0, v5.15.71, v5.15.70, v5.15.69, v5.15.68, v5.15.67, v5.15.66, v5.15.65, v5.15.64, v5.15.63, v5.15.62, v5.15.61, v5.15.60, v5.15.59, v5.19, v5.15.58, v5.15.57, v5.15.56, v5.15.55, v5.15.54, v5.15.53, v5.15.52, v5.15.51, v5.15.50, v5.15.49, v5.15.48, v5.15.47, v5.15.46, v5.15.45, v5.15.44, v5.15.43, v5.15.42, v5.18, v5.15.41, v5.15.40, v5.15.39, v5.15.38, v5.15.37, v5.15.36, v5.15.35, v5.15.34, v5.15.33, v5.15.32, v5.15.31, v5.17, v5.15.30, v5.15.29, v5.15.28, v5.15.27, v5.15.26, v5.15.25, v5.15.24, v5.15.23, v5.15.22, v5.15.21, v5.15.20, v5.15.19, v5.15.18, v5.15.17, v5.4.173, v5.15.16, v5.15.15, v5.16, v5.15.10, v5.15.9, v5.15.8, v5.15.7, v5.15.6, v5.15.5, v5.15.4, v5.15.3, v5.15.2, v5.15.1, v5.15, v5.14.14, v5.14.13, v5.14.12, v5.14.11, v5.14.10, v5.14.9, v5.14.8, v5.14.7, v5.14.6, v5.10.67, v5.10.66, v5.14.5, v5.14.4, v5.10.65, v5.14.3, v5.10.64, v5.14.2, v5.10.63, v5.14.1, v5.10.62, v5.14, v5.10.61, v5.10.60, v5.10.53, v5.10.52, v5.10.51, v5.10.50, v5.10.49, v5.13, v5.10.46, v5.10.43, v5.10.42, v5.10.41, v5.10.40, v5.10.39, v5.4.119, v5.10.36, v5.10.35, v5.10.34, v5.4.116, v5.10.33, v5.12, v5.10.32, v5.10.31, v5.10.30, v5.10.27, v5.10.26, v5.10.25, v5.10.24, v5.10.23, v5.10.22, v5.10.21, v5.10.20, v5.10.19, v5.4.101
# cdd38c5f 24-Feb-2021 Stefan Schmidt <stefan@datenfreihafen.org>

Merge remote-tracking branch 'net/master'


Revision tags: v5.10.18
# cbecf716 22-Feb-2021 Dmitry Torokhov <dmitry.torokhov@gmail.com>

Merge branch 'next' into for-linus

Prepare input updates for 5.12 merge window.


# 415e915f 22-Feb-2021 Dmitry Torokhov <dmitry.torokhov@gmail.com>

Merge tag 'v5.11' into next

Merge with mainline to get latest APIs and device tree bindings.


Revision tags: v5.10.17, v5.11, v5.10.16, v5.10.15, v5.10.14
# 9d4d8572 02-Feb-2021 Russell King <rmk+kernel@armlinux.org.uk>

Merge tag 'amba-make-remove-return-void' of https://git.pengutronix.de/git/ukl/linux into devel-stable

Tag for adaptions to struct amba_driver::remove changing prototype


# 715a1284 15-Jan-2021 Tony Lindgren <tony@atomide.com>

Merge branch 'cpuidle-fix' into fixes


# d263dfa7 15-Jan-2021 Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

Merge drm/drm-next into drm-intel-gt-next

Backmerging to get a common base for merging topic branches between
drm-intel-next and drm-intel-gt-next.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@l

Merge drm/drm-next into drm-intel-gt-next

Backmerging to get a common base for merging topic branches between
drm-intel-next and drm-intel-gt-next.

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

show more ...


# 10205618 08-Jan-2021 Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge drm/drm-next into drm-intel-next

sync-up to not fall too much behind.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>


# 6dcb8bf9 07-Jan-2021 Takashi Iwai <tiwai@suse.de>

Merge branch 'for-linus' into for-next

Back-merge of 5.11-devel branch for syncing the result changes.

Signed-off-by: Takashi Iwai <tiwai@suse.de>


# 7b622755 07-Jan-2021 Takashi Iwai <tiwai@suse.de>

Merge tag 'asoc-fix-v5.11-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v5.11

A collection of mostly driver specific fixes, plus a maintainers

Merge tag 'asoc-fix-v5.11-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v5.11

A collection of mostly driver specific fixes, plus a maintainership
update for TI and a fix for DAPM driver removal paths.

show more ...


# 2313f470 07-Jan-2021 Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

Merge drm/drm-next into drm-misc-next

Staying in sync to drm-next, and to be able to pull ttm fixes.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>


# 8db90aa3 28-Dec-2020 Mark Brown <broonie@kernel.org>

Merge tag 'v5.11-rc1' into spi-5.11

Linux 5.11-rc1


# 2ae6f64c 28-Dec-2020 Mark Brown <broonie@kernel.org>

Merge tag 'v5.11-rc1' into regulator-5.11

Linux 5.11-rc1


# f81325a0 28-Dec-2020 Mark Brown <broonie@kernel.org>

Merge tag 'v5.11-rc1' into asoc-5.11

Linux 5.11-rc1


# 281a94b0 17-Dec-2020 Arnaldo Carvalho de Melo <acme@redhat.com>

Merge remote-tracking branch 'torvalds/master' into perf/core

To pick up fixes and check what UAPI headers need to be synched.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>


# 54d79483 14-Dec-2020 Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'x86_mm_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 mm update from Borislav Petkov:
"A single improvement to check ident_pud_init()'s return value (Arvind

Merge tag 'x86_mm_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 mm update from Borislav Petkov:
"A single improvement to check ident_pud_init()'s return value (Arvind
Sankar)"

* tag 'x86_mm_for_v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm/ident_map: Check for errors from ident_pud_init()

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Revision tags: v5.10, v5.8.17
# 1fcd0091 27-Oct-2020 Arvind Sankar <nivedita@alum.mit.edu>

x86/mm/ident_map: Check for errors from ident_pud_init()

Commit

ea3b5e60ce80 ("x86/mm/ident_map: Add 5-level paging support")

added ident_p4d_init() to support 5-level paging, but this function

x86/mm/ident_map: Check for errors from ident_pud_init()

Commit

ea3b5e60ce80 ("x86/mm/ident_map: Add 5-level paging support")

added ident_p4d_init() to support 5-level paging, but this function
doesn't check and return errors from ident_pud_init().

For example, the decompressor stub uses this code to create an identity
mapping. If it runs out of pages while trying to allocate a PMD
pagetable, the error will be currently ignored.

Fix this to propagate errors.

[ bp: Space out statements for better readability. ]

Fixes: ea3b5e60ce80 ("x86/mm/ident_map: Add 5-level paging support")
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: https://lkml.kernel.org/r/20201027230648.1885111-1-nivedita@alum.mit.edu

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