From: Nicholas Piggin <npiggin@gmail.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Michael Ellerman <mpe@ellerman.id.au>,
msuchanek@suse.de, Paul Mackerras <paulus@samba.org>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [RFC PATCH v3 15/15] powerpc/kernel: Do not inconditionally save non volatile registers on system call
Date: Tue, 07 Apr 2020 11:10:54 +1000 [thread overview]
Message-ID: <1586221719.pt68ef9jgc.astroid@bobo.none> (raw)
In-Reply-To: <1299b6b50facf78458e7db265fb9936595ea009a.1586196948.git.christophe.leroy@c-s.fr>
Christophe Leroy's on April 7, 2020 4:16 am:
> + ret = syscall_exit_prepare_end(ret, regs, ti_flags);
> + if (unlikely(ret & 0x80000000)) {
> + ret &= ~0x80000000;
We could just add our own set of defines for these, there's no real
reason to use _TIF_RESTOREALL as I had.
Thanks,
Nick
prev parent reply other threads:[~2020-04-07 1:12 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-06 18:16 [RFC PATCH v3 01/15] powerpc/syscall: Refactorise from Nick Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 02/15] powerpc/radix: Make kuap_check_amr() and kuap_restore_amr() generic Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 03/15] powerpc/32s: Create C version of kuap_restore() and kuap_check() Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 04/15] powerpc/8xx: " Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 05/15] powerpc/irq: Add helpers to get and set regs->softe Christophe Leroy
2020-04-07 0:50 ` Nicholas Piggin
2020-04-06 18:16 ` [RFC PATCH v3 06/15] powerpc/irq: Add new helpers to play with MSR_EE and MSR_RI on PPC32 Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 07/15] powerpc/irq: Add stub irq_soft_mask_return() for PPC32 Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 08/15] powerpc/syscall: Rename syscall_64.c into syscall.c Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 09/15] powerpc/syscall: Make syscall_64.c buildable on PPC32 Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 10/15] powerpc/syscall: Use is_compat_task() Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 11/15] powerpc/syscall: Save r3 in regs->orig_r3 Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 12/15] powerpc/syscall: Selectively check MSR_RI and MSR_PR on syscall entry Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 13/15] powerpc/syscall: system call implement entry/exit logic in C for PPC32 Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 14/15] powerpc/syscall: Avoid stack frame in likely part of syscall_call_exception() Christophe Leroy
2020-04-06 18:16 ` [RFC PATCH v3 15/15] powerpc/kernel: Do not inconditionally save non volatile registers on system call Christophe Leroy
2020-04-07 1:10 ` Nicholas Piggin [this message]
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