From: Dave Hansen <dave.hansen@intel.com>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Dmitry Vyukov <dvyukov@google.com>,
peterz@infradead.org, boqun.feng@gmail.com, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com,
hpa@zytor.com, aruna.ramakrishna@oracle.com, elver@google.com
Cc: "Paul E. McKenney" <paulmck@kernel.org>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/4] rseq: Make rseq work with protection keys
Date: Fri, 21 Feb 2025 13:40:50 -0800 [thread overview]
Message-ID: <f0a2dc31-1040-43f8-968d-345acc8a543d@intel.com> (raw)
In-Reply-To: <eb087edd-4ff5-40f8-afcb-e4d94fb2a7ba@efficios.com>
On 2/21/25 13:11, Mathieu Desnoyers wrote:
> I have no clue what a "remote" pkey access is. Is this the io_uring
> use-case ?
Yeah, that's one of them.
It's basically all of the *_user_pages_remote() sites which are places
that the kernel does userspace memory manipulation but doesn't have a
good user *context* with which to do it, thus no good PKRU value.
The "remote" nomenclature is because these are mostly (all??) one
process accessing another process without that other process really
being involved.
next prev parent reply other threads:[~2025-02-21 21:40 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1739790300.git.dvyukov@google.com>
2025-02-17 11:07 ` [PATCH 1/4] pkeys: add API to switch to permissive pkey register Dmitry Vyukov
2025-02-17 20:03 ` Mathieu Desnoyers
2025-02-17 20:08 ` Mathieu Desnoyers
2025-02-17 20:09 ` Mathieu Desnoyers
2025-02-21 17:01 ` Dave Hansen
2025-02-24 13:25 ` Dmitry Vyukov
2025-02-25 16:15 ` Dave Hansen
2025-02-25 21:56 ` Dmitry Vyukov
2025-02-26 10:00 ` Dmitry Vyukov
2025-02-26 17:21 ` Dave Hansen
2025-02-27 13:58 ` Dmitry Vyukov
2025-02-21 17:37 ` Dave Hansen
2025-02-17 11:07 ` [PATCH 2/4] x86/signal: Use switch_to_permissive_pkey_reg() helper Dmitry Vyukov
2025-02-21 16:26 ` Dave Hansen
2025-02-24 13:13 ` Dmitry Vyukov
2025-02-17 11:07 ` [PATCH 3/4] rseq: Make rseq work with protection keys Dmitry Vyukov
2025-02-17 20:21 ` Mathieu Desnoyers
2025-02-18 7:55 ` Dmitry Vyukov
2025-02-18 14:57 ` Mathieu Desnoyers
2025-02-18 15:10 ` Dmitry Vyukov
2025-02-18 15:27 ` Mathieu Desnoyers
2025-02-18 15:37 ` Dmitry Vyukov
2025-02-21 11:22 ` Dmitry Vyukov
2025-02-21 19:41 ` Mathieu Desnoyers
2025-02-21 17:17 ` Dave Hansen
2025-02-21 19:38 ` Mathieu Desnoyers
2025-02-21 19:48 ` Dave Hansen
2025-02-21 20:05 ` Mathieu Desnoyers
2025-02-21 20:50 ` Dave Hansen
2025-02-21 21:11 ` Mathieu Desnoyers
2025-02-21 21:36 ` Mathieu Desnoyers
2025-02-21 21:45 ` Dave Hansen
2025-02-24 13:35 ` Dmitry Vyukov
2025-02-21 21:40 ` Dave Hansen [this message]
2025-02-17 11:07 ` [PATCH 4/4] selftests/rseq: Add test for rseq+pkeys Dmitry Vyukov
2025-02-17 20:23 ` Mathieu Desnoyers
2025-02-21 17:24 ` Dave Hansen
2025-02-24 13:22 ` Dmitry Vyukov
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