From: Yeoreum Yun <yeoreum.yun@arm.com>
To: Oliver Upton <oupton@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev,
kvm@vger.kernel.org, linux-kselftest@vger.kernel.org,
catalin.marinas@arm.com, will@kernel.org, maz@kernel.org,
miko.lenczewski@arm.com, kevin.brodsky@arm.com,
broonie@kernel.org, ardb@kernel.org, suzuki.poulose@arm.com,
lpieralisi@kernel.org, joey.gouly@arm.com, yuzenghui@huawei.com
Subject: Re: [PATCH v14 7/8] KVM: arm64: use CASLT instruction for swapping guest descriptor
Date: Thu, 26 Feb 2026 13:52:45 +0000 [thread overview]
Message-ID: <aaBQLTOe2NwoVZf8@e129823.arm.com> (raw)
In-Reply-To: <aaAwtrrJ-qFrqktX@kernel.org>
Hi Oliver,
> On Wed, Feb 25, 2026 at 06:27:07PM +0000, Yeoreum Yun wrote:
> > + asm volatile(__LSUI_PREAMBLE
> > + "1: caslt %[old], %[new], %[addr]\n"
>
> The other two flavors of this use relaxed ordering, why can't we do the
> same with LSUI?
Right. I've misunderstood caslt is relaxed symantic.
I should change with CAST.
Thanks!
--
Sincerely,
Yeoreum Yun
next prev parent reply other threads:[~2026-02-26 13:53 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-25 18:27 [PATCH v14 0/8] support FEAT_LSUI Yeoreum Yun
2026-02-25 18:27 ` [PATCH v14 1/8] arm64: cpufeature: add FEAT_LSUI Yeoreum Yun
2026-02-25 18:27 ` [PATCH v14 2/8] KVM: arm64: expose FEAT_LSUI to guest Yeoreum Yun
2026-02-25 18:27 ` [PATCH v14 3/8] KVM: arm64: kselftest: set_id_regs: add test for FEAT_LSUI Yeoreum Yun
2026-02-25 18:27 ` [PATCH v14 4/8] arm64: futex: refactor futex atomic operation Yeoreum Yun
2026-02-25 18:27 ` [PATCH v14 5/8] arm64: futex: support futex with FEAT_LSUI Yeoreum Yun
2026-02-25 18:27 ` [PATCH v14 6/8] arm64: armv8_deprecated: disable swp emulation when FEAT_LSUI present Yeoreum Yun
2026-02-25 18:27 ` [PATCH v14 7/8] KVM: arm64: use CASLT instruction for swapping guest descriptor Yeoreum Yun
2026-02-26 11:16 ` Marc Zyngier
2026-02-26 14:05 ` Yeoreum Yun
2026-02-26 14:52 ` Suzuki K Poulose
2026-02-27 8:31 ` Yeoreum Yun
2026-02-26 11:28 ` Suzuki K Poulose
2026-02-26 13:53 ` Yeoreum Yun
2026-02-26 11:38 ` Oliver Upton
2026-02-26 13:52 ` Yeoreum Yun [this message]
2026-02-25 18:27 ` [PATCH v14 8/8] arm64: Kconfig: add support for LSUI Yeoreum Yun
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