From: Dave Hansen <dave.hansen@intel.com>
To: Aruna Ramakrishna <aruna.ramakrishna@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
"mingo@redhat.com" <mingo@redhat.com>,
"dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
"x86@kernel.org" <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Rudi Horn <rudi.horn@oracle.com>, Joe Jin <joe.jin@oracle.com>,
Jeff Xu <jeffxu@chromium.org>
Subject: Re: [RFC] Restore PKRU to user-defined value after signal handling
Date: Wed, 6 Nov 2024 11:47:16 -0800 [thread overview]
Message-ID: <19355174-c626-4f64-8158-820b393460d2@intel.com> (raw)
In-Reply-To: <9BA465A2-905D-4D0E-87A6-AB89C28A7B4F@oracle.com>
On 11/6/24 11:40, Aruna Ramakrishna wrote:
> I do not understand why it has to be moved. Would you mind explaining?
You need to know what XSTATE_BV value got written by XSAVE. That's
dependent on: XINUSE and RFBM.
RFBM is 'mask' in xsave_to_user_sigframe().
So you can either completely regenerate 'mask' in
update_pkru_in_sigframe() or you can just pass 'mask' in.
next prev parent reply other threads:[~2024-11-06 19:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-06 18:33 Aruna Ramakrishna
2024-11-06 19:27 ` Dave Hansen
2024-11-06 19:40 ` Aruna Ramakrishna
2024-11-06 19:47 ` Dave Hansen [this message]
2024-11-07 11:41 ` Rudi Horn
2024-11-07 15:56 ` Dave Hansen
2024-11-07 16:03 ` Dave Hansen
2024-11-07 23:56 ` Aruna Ramakrishna
2024-11-08 0:26 ` Dave Hansen
2024-11-08 9:58 ` Rudi Horn
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