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From: Mark Rutland <mark.rutland@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: marc.zyngier@arm.com, andre.przywara@arm.com,
	will.deacon@arm.com, dave.martin@arm.com,
	catalin.marinas@arm.com, kvmarm@lists.cs.columbia.edu
Subject: [PATCH 0/3] arm64: alternative: add auto-nop support
Date: Wed,  7 Sep 2016 11:07:07 +0100	[thread overview]
Message-ID: <1473242830-26246-1-git-send-email-mark.rutland@arm.com> (raw)

In some cases where we use pairs of alternative sequences, only one sequence
does valuable work, and the other consists solely of NOPs. We have to manually
ensure that both sequences are the same size, and some NOP sleds are partially
contained unddef ifdefs.

Maintaining this balance is tedious, and the presence of these makes the code
more painful to read than is necessary. These patches add helpers to handle
these cases automatically, making the code more maintainable, and easier to
read.

Thanks,
Mark.

Mark Rutland (3):
  arm64: alternative: add auto-nop infrastructure
  arm64: use alternative auto-nop
  arm64/kvm: use alternative auto-nop

 arch/arm64/include/asm/alternative.h | 71 +++++++++++++++++++++++++++---------
 arch/arm64/include/asm/kvm_mmu.h     | 10 ++---
 arch/arm64/kernel/entry.S            | 10 +----
 arch/arm64/kvm/hyp.S                 |  6 +--
 arch/arm64/lib/copy_page.S           | 13 ++-----
 arch/arm64/mm/proc.S                 |  9 +----
 6 files changed, 66 insertions(+), 53 deletions(-)

-- 
1.9.1

WARNING: multiple messages have this Message-ID (diff)
From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/3] arm64: alternative: add auto-nop support
Date: Wed,  7 Sep 2016 11:07:07 +0100	[thread overview]
Message-ID: <1473242830-26246-1-git-send-email-mark.rutland@arm.com> (raw)

In some cases where we use pairs of alternative sequences, only one sequence
does valuable work, and the other consists solely of NOPs. We have to manually
ensure that both sequences are the same size, and some NOP sleds are partially
contained unddef ifdefs.

Maintaining this balance is tedious, and the presence of these makes the code
more painful to read than is necessary. These patches add helpers to handle
these cases automatically, making the code more maintainable, and easier to
read.

Thanks,
Mark.

Mark Rutland (3):
  arm64: alternative: add auto-nop infrastructure
  arm64: use alternative auto-nop
  arm64/kvm: use alternative auto-nop

 arch/arm64/include/asm/alternative.h | 71 +++++++++++++++++++++++++++---------
 arch/arm64/include/asm/kvm_mmu.h     | 10 ++---
 arch/arm64/kernel/entry.S            | 10 +----
 arch/arm64/kvm/hyp.S                 |  6 +--
 arch/arm64/lib/copy_page.S           | 13 ++-----
 arch/arm64/mm/proc.S                 |  9 +----
 6 files changed, 66 insertions(+), 53 deletions(-)

-- 
1.9.1

             reply	other threads:[~2016-09-07  9:59 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-07 10:07 Mark Rutland [this message]
2016-09-07 10:07 ` [PATCH 0/3] arm64: alternative: add auto-nop support Mark Rutland
2016-09-07 10:07 ` [PATCH 1/3] arm64: alternative: add auto-nop infrastructure Mark Rutland
2016-09-07 10:07   ` Mark Rutland
2016-09-13  8:36   ` Ard Biesheuvel
2016-09-13  8:36     ` Ard Biesheuvel
2016-09-13  8:57     ` Mark Rutland
2016-09-13  8:57       ` Mark Rutland
2016-09-13  8:59       ` Ard Biesheuvel
2016-09-13  8:59         ` Ard Biesheuvel
2016-09-07 10:07 ` [PATCH 2/3] arm64: use alternative auto-nop Mark Rutland
2016-09-07 10:07   ` Mark Rutland
2016-09-07 10:07 ` [PATCH 3/3] arm64/kvm: " Mark Rutland
2016-09-07 10:07   ` Mark Rutland
2016-09-08 11:16   ` Christoffer Dall
2016-09-08 11:16     ` Christoffer Dall
2016-09-08 11:33     ` Mark Rutland
2016-09-08 11:33       ` Mark Rutland

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