From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/5] arm64: alternative: Allow immediate branch as alternative instruction
Date: Thu, 26 Mar 2015 22:31:51 +0000 [thread overview]
Message-ID: <20150326223150.GD23836@arm.com> (raw)
In-Reply-To: <20150326221955.4b8fe6f0@arm.com>
On Thu, Mar 26, 2015 at 10:19:55PM +0000, Marc Zyngier wrote:
> On Thu, 26 Mar 2015 22:03:23 +0000
> Will Deacon <will.deacon@arm.com> wrote:
> > On Thu, Mar 19, 2015 at 01:59:33PM +0000, Marc Zyngier wrote:
> > > + for (i = 0; i < alt->alt_len; i += sizeof(insn)) {
> > > + insn = get_alt_insn(origptr + i, replptr + i);
> > > + *(u32 *)(origptr + i) = insn;
> >
> > My brain's not firing on all cylinders right now, but do you need a
> > cpu_to_le32 here?
>
> I'm not 100% awake myself (probably some acute form of firmwaritis),
> but I suspect you're quite right (get_alt_insn calls aarch64_insn_read,
> which does a le32_to_cpu). Obviously, we need to revert the conversion
> when writing the instruction back.
>
> Do you want a fixup on top of this, or would you prefer me to respin
> the series?
Please respin and add my acks.
Will
next prev parent reply other threads:[~2015-03-26 22:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-19 13:59 [PATCH 0/5] arm64: Patching branches for fun and profit Marc Zyngier
2015-03-19 13:59 ` [PATCH 1/5] arm64: insn: Add aarch64_insn_decode_immediate Marc Zyngier
2015-03-19 13:59 ` [PATCH 2/5] arm64: alternative: Allow immediate branch as alternative instruction Marc Zyngier
2015-03-26 22:03 ` Will Deacon
2015-03-26 22:19 ` Marc Zyngier
2015-03-26 22:31 ` Will Deacon [this message]
2015-03-27 10:42 ` Jon Medhurst (Tixy)
2015-03-27 11:08 ` Marc Zyngier
2015-03-19 13:59 ` [PATCH 3/5] arm64: Extract feature parsing code from cpu_errata.c Marc Zyngier
2015-03-19 13:59 ` [PATCH 4/5] arm64: alternative: Introduce feature for GICv3 CPU interface Marc Zyngier
2015-03-19 13:59 ` [PATCH 5/5] arm64: KVM: Switch vgic save/restore to alternative_insn Marc Zyngier
2015-03-26 22:04 ` [PATCH 0/5] arm64: Patching branches for fun and profit Will Deacon
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