linux-fsdevel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Catalin Marinas <catalin.marinas@arm.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: linux-arm-kernel@lists.infradead.org, will.deacon@arm.com,
	marc.zyngier@arm.com, linux@dominikbrodowski.net,
	hch@infradead.org, james.morse@arm.com, viro@zeniv.linux.org.uk,
	linux-fsdevel@vger.kernel.org, dave.martin@arm.com
Subject: Re: [PATCHv3 11/19] arm64: don't reload GPRs after apply_ssbd
Date: Tue, 19 Jun 2018 16:23:07 +0100	[thread overview]
Message-ID: <20180619152306.iz55qshhqsnql5vy@armageddon.cambridge.arm.com> (raw)
In-Reply-To: <20180618120310.39527-12-mark.rutland@arm.com>

On Mon, Jun 18, 2018 at 01:03:02PM +0100, Mark Rutland wrote:
> Now that all of the syscall logic works on the saved pt_regs, apply_ssbd
> can safely corrupt x0-x3 in the entry paths, and we no longer need to
> restore them. So let's remove the logic doing so.
> 
> With that logic gone, we can fold the branch target into the macro, so
> that callers need not deal with this. GAS provides \@, which provides a
> unique value per macro invocation, which we can use to create a unique
> label.
> 
> Signed-off-by: Mark Rutland <mark.rutland@arm.com>
> Acked-by: Marc Zyngier <marc.zyngier@arm.com>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

  reply	other threads:[~2018-06-19 15:23 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-18 12:02 [PATCHv3 00/19] arm64: invoke syscalls with pt_regs Mark Rutland
2018-06-18 12:02 ` [PATCHv3 01/19] arm64: consistently use unsigned long for thread flags Mark Rutland
2018-06-19 10:49   ` Catalin Marinas
2018-06-19 11:19     ` Mark Rutland
2018-06-18 12:02 ` [PATCHv3 02/19] arm64: move SCTLR_EL{1,2} assertions to <asm/sysreg.h> Mark Rutland
2018-06-19 11:02   ` [PATCHv3 02/19] arm64: move SCTLR_EL{1, 2} " Catalin Marinas
2018-06-19 11:48   ` [PATCHv3 02/19] arm64: move SCTLR_EL{1,2} " Mark Rutland
2018-06-18 12:02 ` [PATCHv3 03/19] arm64: introduce sysreg_clear_set() Mark Rutland
2018-06-19 11:44   ` Catalin Marinas
2018-06-19 11:47   ` Marc Zyngier
2018-06-18 12:02 ` [PATCHv3 04/19] arm64: kill config_sctlr_el1() Mark Rutland
2018-06-19 11:44   ` Catalin Marinas
2018-06-18 12:02 ` [PATCHv3 05/19] arm64: kill change_cpacr() Mark Rutland
2018-06-19 11:45   ` Catalin Marinas
2018-06-18 12:02 ` [PATCHv3 06/19] arm64: move sve_user_{enable,disable} to <asm/fpsimd.h> Mark Rutland
2018-06-19 12:00   ` [PATCHv3 06/19] arm64: move sve_user_{enable, disable} " Catalin Marinas
2018-06-19 12:19   ` Dave Martin
2018-06-18 12:02 ` [PATCHv3 07/19] arm64: remove sigreturn wrappers Mark Rutland
2018-06-19 12:47   ` Catalin Marinas
2018-06-18 12:02 ` [PATCHv3 08/19] arm64: convert raw syscall invocation to C Mark Rutland
2018-06-19 13:33   ` Catalin Marinas
2018-06-19 14:21   ` Catalin Marinas
2018-06-19 14:48     ` Mark Rutland
2018-06-19 14:55       ` Catalin Marinas
2018-06-19 14:58         ` Mark Rutland
2018-06-18 12:03 ` [PATCHv3 09/19] arm64: convert syscall trace logic " Mark Rutland
2018-06-19 14:32   ` Catalin Marinas
2018-06-19 15:14     ` Mark Rutland
2018-06-18 12:03 ` [PATCHv3 10/19] arm64: convert native/compat syscall entry " Mark Rutland
2018-06-19 12:18   ` Dave Martin
2018-06-19 13:15     ` Mark Rutland
2018-06-20  9:21       ` Dave Martin
2018-06-19 15:20   ` Catalin Marinas
2018-06-18 12:03 ` [PATCHv3 11/19] arm64: don't reload GPRs after apply_ssbd Mark Rutland
2018-06-19 15:23   ` Catalin Marinas [this message]
2018-06-18 12:03 ` [PATCHv3 12/19] arm64: zero GPRs upon entry from EL0 Mark Rutland
2018-06-19 15:24   ` Catalin Marinas
2018-06-18 12:03 ` [PATCHv3 13/19] kernel: add ksys_personality() Mark Rutland
2018-06-19 15:45   ` Catalin Marinas
2018-06-19 15:53     ` Mark Rutland
2018-06-18 12:03 ` [PATCHv3 14/19] kernel: add kcompat_sys_{f,}statfs64() Mark Rutland
2018-06-18 12:03 ` [PATCHv3 15/19] arm64: remove in-kernel call to sys_personality() Mark Rutland
2018-06-19 15:46   ` Catalin Marinas
2018-06-18 12:03 ` [PATCHv3 16/19] arm64: use {COMPAT,}SYSCALL_DEFINE0 for sigreturn Mark Rutland
2018-06-19 15:48   ` Catalin Marinas
2018-06-18 12:03 ` [PATCHv3 17/19] arm64: use SYSCALL_DEFINE6() for mmap Mark Rutland
2018-06-19 15:50   ` Catalin Marinas
2018-06-18 12:03 ` [PATCHv3 18/19] arm64: convert compat wrappers to C Mark Rutland
2018-06-19 15:51   ` Catalin Marinas
2018-06-18 12:03 ` [PATCHv3 19/19] arm64: implement syscall wrappers Mark Rutland
2018-06-19 16:13   ` Catalin Marinas
2018-06-19 15:38 ` [PATCHv3 00/19] arm64: invoke syscalls with pt_regs Mark Rutland
2018-06-19 16:14   ` 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=20180619152306.iz55qshhqsnql5vy@armageddon.cambridge.arm.com \
    --to=catalin.marinas@arm.com \
    --cc=dave.martin@arm.com \
    --cc=hch@infradead.org \
    --cc=james.morse@arm.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux@dominikbrodowski.net \
    --cc=marc.zyngier@arm.com \
    --cc=mark.rutland@arm.com \
    --cc=viro@zeniv.linux.org.uk \
    --cc=will.deacon@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).