From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, "Andy Lutomirski" <luto@kernel.org>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
kvm@vger.kernel.org, "Jason A. Donenfeld" <Jason@zx2c4.com>,
"Rik van Riel" <riel@surriel.com>,
"Sebastian Andrzej Siewior" <bigeasy@linutronix.de>
Subject: [RFC PATCH 07/10] x86/entry: add TIF_LOAD_FPU
Date: Wed, 12 Sep 2018 15:33:50 +0200 [thread overview]
Message-ID: <20180912133353.20595-8-bigeasy@linutronix.de> (raw)
In-Reply-To: <20180912133353.20595-1-bigeasy@linutronix.de>
Add TIF_LOAD_FPU. This is reserved for loading the FPU registers before
returning to userpace. It is introduced now, so we can add code handling
it now before adding the main feature.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
arch/x86/include/asm/thread_info.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
index cd6920674b905..cd910fd8c8c4c 100644
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -83,6 +83,7 @@ struct thread_info {
#define TIF_SYSCALL_EMU 6 /* syscall emulation active */
#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
#define TIF_SECCOMP 8 /* secure computing */
+#define TIF_LOAD_FPU 10 /* load FPU on return to userspace */
#define TIF_USER_RETURN_NOTIFY 11 /* notify kernel of userspace return */
#define TIF_UPROBE 12 /* breakpointed or singlestepping */
#define TIF_PATCH_PENDING 13 /* pending live patching update */
@@ -110,6 +111,7 @@ struct thread_info {
#define _TIF_SYSCALL_EMU (1 << TIF_SYSCALL_EMU)
#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP (1 << TIF_SECCOMP)
+#define _TIF_LOAD_FPU (1 << TIF_LOAD_FPU)
#define _TIF_USER_RETURN_NOTIFY (1 << TIF_USER_RETURN_NOTIFY)
#define _TIF_UPROBE (1 << TIF_UPROBE)
#define _TIF_PATCH_PENDING (1 << TIF_PATCH_PENDING)
--
2.19.0
next prev parent reply other threads:[~2018-09-12 13:36 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-12 13:33 [RFC PATCH] x86: load FPU registers on return to userland Sebastian Andrzej Siewior
2018-09-12 13:33 ` [RFC PATCH 01/10] x86/entry: remove _TIF_ALLWORK_MASK Sebastian Andrzej Siewior
2018-09-27 14:21 ` Sebastian Andrzej Siewior
2018-09-12 13:33 ` [RFC PATCH 02/10] kvm: x86: make kvm_{load|put}_guest_fpu() static Sebastian Andrzej Siewior
2018-09-12 13:33 ` [RFC PATCH 03/10] x86/fpu: add (__)make_fpregs_active helpers Sebastian Andrzej Siewior
2018-09-12 13:33 ` [RFC PATCH 04/10] x86/fpu: eager switch PKRU state Sebastian Andrzej Siewior
2018-09-12 14:18 ` Paolo Bonzini
2018-09-12 15:24 ` Andy Lutomirski
2018-09-12 15:30 ` Paolo Bonzini
2018-09-14 20:35 ` [RFC PATCH 04/10 v2 ] " Sebastian Andrzej Siewior
2018-09-17 8:37 ` Paolo Bonzini
2018-09-18 14:27 ` Sebastian Andrzej Siewior
2018-09-18 15:07 ` Paolo Bonzini
2018-09-18 15:11 ` Rik van Riel
2018-09-18 15:29 ` Paolo Bonzini
2018-09-18 16:04 ` Sebastian Andrzej Siewior
2018-09-18 17:29 ` Rik van Riel
2018-09-19 5:55 ` Paolo Bonzini
2018-09-19 16:57 ` Sebastian Andrzej Siewior
2018-09-19 17:00 ` Paolo Bonzini
2018-09-19 17:19 ` Sebastian Andrzej Siewior
2018-09-19 19:38 ` Rik van Riel
2018-09-19 19:49 ` Andy Lutomirski
2018-09-12 15:20 ` [RFC PATCH 04/10] " Andy Lutomirski
2018-09-12 15:30 ` Rik van Riel
2018-09-12 15:49 ` Andy Lutomirski
2018-09-19 16:58 ` Sebastian Andrzej Siewior
2018-09-12 13:33 ` [RFC PATCH 05/10] x86/pkeys: Drop the preempt-disable section Sebastian Andrzej Siewior
2018-09-12 13:33 ` [RFC PATCH 06/10] x86/fpu: Always store the registers in copy_fpstate_to_sigframe() Sebastian Andrzej Siewior
2018-09-12 13:33 ` Sebastian Andrzej Siewior [this message]
2018-09-12 13:33 ` [RFC PATCH 08/10] x86/fpu: prepare copy_fpstate_to_sigframe for TIF_LOAD_FPU Sebastian Andrzej Siewior
2018-09-12 13:33 ` [RFC PATCH 09/10] x86/fpu: copy non-resident FPU state at fork time Sebastian Andrzej Siewior
2018-09-12 13:33 ` [RFC PATCH 10/10] x86/fpu: defer FPU state load until return to userspace Sebastian Andrzej Siewior
2018-09-12 15:47 ` Andy Lutomirski
2018-09-19 17:05 ` Sebastian Andrzej Siewior
2018-09-21 3:45 ` Andy Lutomirski
2018-09-21 4:15 ` Andy Lutomirski
2018-09-26 11:12 ` Sebastian Andrzej Siewior
2018-09-26 14:34 ` Andy Lutomirski
2018-09-26 15:32 ` Sebastian Andrzej Siewior
2018-09-26 16:24 ` Andy Lutomirski
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