From: Catalin Marinas <catalin.marinas@arm.com>
To: Marc Zyngier <maz@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>,
Mark Brown <broonie@kernel.org>, Will Deacon <will@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Andrew Morton <akpm@linux-foundation.org>,
Oliver Upton <oliver.upton@linux.dev>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Arnd Bergmann <arnd@arndb.de>, Oleg Nesterov <oleg@redhat.com>,
Eric Biederman <ebiederm@xmission.com>,
Shuah Khan <shuah@kernel.org>,
"Rick P. Edgecombe" <rick.p.edgecombe@intel.com>,
Deepak Gupta <debug@rivosinc.com>,
Ard Biesheuvel <ardb@kernel.org>,
Szabolcs Nagy <Szabolcs.Nagy@arm.com>,
Kees Cook <kees@kernel.org>, "H.J. Lu" <hjl.tools@gmail.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Florian Weimer <fweimer@redhat.com>,
Christian Brauner <brauner@kernel.org>,
Thiago Jung Bauermann <thiago.bauermann@linaro.org>,
Ross Burton <ross.burton@arm.com>,
David Spickett <david.spickett@arm.com>,
Yury Khrustalev <yury.khrustalev@arm.com>,
Wilco Dijkstra <wilco.dijkstra@arm.com>,
linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org,
linux-arch@vger.kernel.org, linux-mm@kvack.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org
Subject: Re: [PATCH v13 11/40] arm64/gcs: Provide basic EL2 setup to allow GCS usage at EL0 and EL1
Date: Mon, 14 Oct 2024 17:31:47 +0100 [thread overview]
Message-ID: <Zw1Hc38CwFS2XE6c@arm.com> (raw)
In-Reply-To: <86h69i6bpy.wl-maz@kernel.org>
On Fri, Oct 11, 2024 at 01:55:05PM +0100, Marc Zyngier wrote:
> On Thu, 10 Oct 2024 18:16:52 +0100,
> Catalin Marinas <catalin.marinas@arm.com> wrote:
> >
> > On Thu, Oct 10, 2024 at 04:18:13PM +0100, Marc Zyngier wrote:
> > > From 20c98d2647c11db1e40768f92c5998ff5d764a3a Mon Sep 17 00:00:00 2001
> > > From: Marc Zyngier <maz@kernel.org>
> > > Date: Thu, 10 Oct 2024 16:13:26 +0100
> > > Subject: [PATCH] KVM: arm64: Shave a few bytes from the EL2 idmap code
> > >
> > > Our idmap is becoming too big, to the point where it doesn't fit in
> > > a 4kB page anymore.
> > >
> > > There are some low-hanging fruits though, such as the el2_init_state
> > > horror that is expanded 3 times in the kernel. Let's at least limit
> > > ourselves to two copies, which makes the kernel link again.
> > >
> > > At some point, we'll have to have a better way of doing this.
> > >
> > > Reported-by: Nathan Chancellor <nathan@kernel.org>
> > > Signed-off-by: Marc Zyngier <maz@kernel.org>
> > > Link: https://lore.kernel.org/r/20241009204903.GA3353168@thelio-3990X
> >
> > Thanks Marc for the quick fix. It looks fine to me, it will keep the
> > linker quiet for a while. I pushed it to arm64 for-kernelci for the time
> > being, see if anything falls apart. I'll apply it properly once it gets
> > a bit more testing.
>
> Works for me. But if that helps, I can also queue it as a KVM fix for
> 6.12, leaving the GCS branch unencumbered. Just let me know.
That would help, thanks. The for-kernelci branch merges the latest mainline
rc anyway, so it will no longer blow up allmodconfig tests.
--
Catalin
next prev parent reply other threads:[~2024-10-14 16:31 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-01 22:58 [PATCH v13 00/40] arm64/gcs: Provide support for GCS in userspace Mark Brown
2024-10-01 22:58 ` [PATCH v13 01/40] mm: Introduce ARCH_HAS_USER_SHADOW_STACK Mark Brown
2024-10-01 22:58 ` [PATCH v13 02/40] mm: Define VM_HIGH_ARCH_6 Mark Brown
2024-10-01 22:58 ` [PATCH v13 03/40] arm64/mm: Restructure arch_validate_flags() for extensibility Mark Brown
2024-10-01 22:58 ` [PATCH v13 04/40] prctl: arch-agnostic prctl for shadow stack Mark Brown
2024-10-01 23:13 ` Deepak Gupta
2024-10-01 22:58 ` [PATCH v13 05/40] mman: Add map_shadow_stack() flags Mark Brown
2024-10-01 22:58 ` [PATCH v13 06/40] arm64: Document boot requirements for Guarded Control Stacks Mark Brown
2024-10-01 22:58 ` [PATCH v13 07/40] arm64/gcs: Document the ABI " Mark Brown
2024-10-01 22:58 ` [PATCH v13 08/40] arm64/sysreg: Add definitions for architected GCS caps Mark Brown
2024-10-01 22:58 ` [PATCH v13 09/40] arm64/gcs: Add manual encodings of GCS instructions Mark Brown
2024-10-01 22:58 ` [PATCH v13 10/40] arm64/gcs: Provide put_user_gcs() Mark Brown
2024-10-01 22:58 ` [PATCH v13 11/40] arm64/gcs: Provide basic EL2 setup to allow GCS usage at EL0 and EL1 Mark Brown
2024-10-09 20:49 ` Nathan Chancellor
2024-10-10 15:18 ` Marc Zyngier
2024-10-10 17:16 ` Catalin Marinas
2024-10-11 12:55 ` Marc Zyngier
2024-10-14 16:31 ` Catalin Marinas [this message]
2024-10-15 13:05 ` Catalin Marinas
2024-10-01 22:58 ` [PATCH v13 12/40] arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS) Mark Brown
2024-10-01 22:58 ` [PATCH v13 13/40] arm64/mm: Allocate PIE slots for EL0 guarded control stack Mark Brown
2024-10-01 22:58 ` [PATCH v13 14/40] mm: Define VM_SHADOW_STACK for arm64 when we support GCS Mark Brown
2024-10-01 22:58 ` [PATCH v13 15/40] arm64/mm: Map pages for guarded control stack Mark Brown
2024-10-01 22:58 ` [PATCH v13 16/40] KVM: arm64: Manage GCS access and registers for guests Mark Brown
2024-10-02 0:24 ` Marc Zyngier
2024-10-02 15:55 ` Marc Zyngier
2024-10-02 18:24 ` Mark Brown
2024-10-02 19:29 ` Marc Zyngier
2024-10-03 14:50 ` Mark Brown
2024-10-01 22:58 ` [PATCH v13 17/40] arm64/idreg: Add overrride for GCS Mark Brown
2024-10-01 22:58 ` [PATCH v13 18/40] arm64/hwcap: Add hwcap " Mark Brown
2024-10-03 16:25 ` Yury Khrustalev
2024-10-01 22:58 ` [PATCH v13 19/40] arm64/traps: Handle GCS exceptions Mark Brown
2024-10-01 22:58 ` [PATCH v13 20/40] arm64/mm: Handle GCS data aborts Mark Brown
2024-10-01 22:59 ` [PATCH v13 21/40] arm64/gcs: Context switch GCS state for EL0 Mark Brown
2024-10-01 22:59 ` [PATCH v13 22/40] arm64/gcs: Ensure that new threads have a GCS Mark Brown
2024-10-04 11:18 ` Catalin Marinas
2024-10-04 11:50 ` Mark Brown
2024-10-01 22:59 ` [PATCH v13 23/40] arm64/gcs: Implement shadow stack prctl() interface Mark Brown
2024-10-01 22:59 ` [PATCH v13 24/40] arm64/mm: Implement map_shadow_stack() Mark Brown
2024-10-01 22:59 ` [PATCH v13 25/40] arm64/signal: Set up and restore the GCS context for signal handlers Mark Brown
2024-10-01 22:59 ` [PATCH v13 26/40] arm64/signal: Expose GCS state in signal frames Mark Brown
2024-10-01 22:59 ` [PATCH v13 27/40] arm64/ptrace: Expose GCS via ptrace and core files Mark Brown
2024-10-01 22:59 ` [PATCH v13 28/40] arm64: Add Kconfig for Guarded Control Stack (GCS) Mark Brown
2024-10-01 22:59 ` [PATCH v13 29/40] kselftest/arm64: Verify the GCS hwcap Mark Brown
2024-10-01 22:59 ` [PATCH v13 30/40] kselftest/arm64: Add GCS as a detected feature in the signal tests Mark Brown
2024-10-01 22:59 ` [PATCH v13 31/40] kselftest/arm64: Add framework support for GCS to signal handling tests Mark Brown
2024-10-01 22:59 ` [PATCH v13 32/40] kselftest/arm64: Allow signals tests to specify an expected si_code Mark Brown
2024-10-01 22:59 ` [PATCH v13 33/40] kselftest/arm64: Always run signals tests with GCS enabled Mark Brown
2024-10-01 22:59 ` [PATCH v13 34/40] kselftest/arm64: Add very basic GCS test program Mark Brown
2024-10-01 22:59 ` [PATCH v13 35/40] kselftest/arm64: Add a GCS test program built with the system libc Mark Brown
2024-10-01 22:59 ` [PATCH v13 36/40] kselftest/arm64: Add test coverage for GCS mode locking Mark Brown
2024-10-01 22:59 ` [PATCH v13 37/40] kselftest/arm64: Add GCS signal tests Mark Brown
2024-10-01 22:59 ` [PATCH v13 38/40] kselftest/arm64: Add a GCS stress test Mark Brown
2024-10-01 22:59 ` [PATCH v13 39/40] kselftest/arm64: Enable GCS for the FP stress tests Mark Brown
2024-10-01 22:59 ` [PATCH v13 40/40] KVM: selftests: arm64: Add GCS registers to get-reg-list Mark Brown
2024-10-04 13:52 ` (subset) [PATCH v13 00/40] arm64/gcs: Provide support for GCS in userspace Catalin Marinas
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Zw1Hc38CwFS2XE6c@arm.com \
--to=catalin.marinas@arm.com \
--cc=Szabolcs.Nagy@arm.com \
--cc=akpm@linux-foundation.org \
--cc=aou@eecs.berkeley.edu \
--cc=ardb@kernel.org \
--cc=arnd@arndb.de \
--cc=brauner@kernel.org \
--cc=broonie@kernel.org \
--cc=corbet@lwn.net \
--cc=david.spickett@arm.com \
--cc=debug@rivosinc.com \
--cc=ebiederm@xmission.com \
--cc=fweimer@redhat.com \
--cc=hjl.tools@gmail.com \
--cc=james.morse@arm.com \
--cc=kees@kernel.org \
--cc=kvmarm@lists.linux.dev \
--cc=linux-arch@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-riscv@lists.infradead.org \
--cc=maz@kernel.org \
--cc=nathan@kernel.org \
--cc=oleg@redhat.com \
--cc=oliver.upton@linux.dev \
--cc=palmer@dabbelt.com \
--cc=paul.walmsley@sifive.com \
--cc=rick.p.edgecombe@intel.com \
--cc=ross.burton@arm.com \
--cc=shuah@kernel.org \
--cc=suzuki.poulose@arm.com \
--cc=thiago.bauermann@linaro.org \
--cc=wilco.dijkstra@arm.com \
--cc=will@kernel.org \
--cc=yury.khrustalev@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).