From: Jon Masters <jcm@jonmasters.org>
To: Marc Zyngier <marc.zyngier@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, kvmarm@lists.cs.columbia.edu
Cc: Will Deacon <will.deacon@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@kernel.org>,
Kees Cook <keescook@chromium.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Christoffer Dall <christoffer.dall@arm.com>,
Randy Dunlap <rdunlap@infradead.org>,
Dominik Brodowski <linux@dominikbrodowski.net>,
Julien Grall <julien.grall@arm.com>,
Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH v2 12/17] arm64: KVM: Add ARCH_WORKAROUND_2 support for guests
Date: Sat, 9 Jun 2018 09:09:35 -0400 [thread overview]
Message-ID: <98318e6c-adcd-ddb8-ad92-e7c1fa771c84@jonmasters.org> (raw)
In-Reply-To: <20180529121121.24927-13-marc.zyngier@arm.com>
On 05/29/2018 08:11 AM, Marc Zyngier wrote:
> In order to offer ARCH_WORKAROUND_2 support to guests, we need
> a bit of infrastructure.
>
> Let's add a flag indicating whether or not the guest uses
> SSBD mitigation. Depending on the state of this flag, allow
> KVM to disable ARCH_WORKAROUND_2 before entering the guest,
> and enable it when exiting it.
...Live migration?
Jon.
next prev parent reply other threads:[~2018-06-09 13:10 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-29 12:11 [PATCH v2 00/17] arm64 SSBD (aka Spectre-v4) mitigation Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 01/17] arm/arm64: smccc: Add SMCCC-specific return codes Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 02/17] arm64: Call ARCH_WORKAROUND_2 on transitions between EL0 and EL1 Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 03/17] arm64: Add per-cpu infrastructure to call ARCH_WORKAROUND_2 Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 04/17] arm64: Add ARCH_WORKAROUND_2 probing Marc Zyngier
2018-05-29 13:39 ` Suzuki K Poulose
2018-05-29 12:11 ` [PATCH v2 05/17] arm64: Add 'ssbd' command-line option Marc Zyngier
2018-06-09 12:53 ` Jon Masters
2018-06-09 13:19 ` Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 06/17] arm64: ssbd: Add global mitigation state accessor Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 07/17] arm64: ssbd: Skip apply_ssbd if not using dynamic mitigation Marc Zyngier
2018-06-09 13:03 ` Jon Masters
2018-06-09 13:21 ` Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 08/17] arm64: ssbd: Restore mitigation status on CPU resume Marc Zyngier
2018-05-29 13:35 ` Mark Rutland
2018-05-29 12:11 ` [PATCH v2 09/17] arm64: ssbd: Introduce thread flag to control userspace mitigation Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 10/17] arm64: ssbd: Add prctl interface for per-thread mitigation Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 11/17] arm64: KVM: Add HYP per-cpu accessors Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 12/17] arm64: KVM: Add ARCH_WORKAROUND_2 support for guests Marc Zyngier
2018-06-09 13:09 ` Jon Masters [this message]
2018-06-09 13:21 ` Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 13/17] arm64: KVM: Handle guest's ARCH_WORKAROUND_2 requests Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 14/17] arm64: KVM: Add ARCH_WORKAROUND_2 discovery through ARCH_FEATURES_FUNC_ID Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 15/17] arm64: Add test_and_clear_flag and set_flag atomic assembler primitives Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 16/17] arm64: ssbd: Enable delayed setting of TIF_SSBD Marc Zyngier
2018-05-29 12:11 ` [PATCH v2 17/17] arm64: ssbd: Implement arch_seccomp_spec_mitigate Marc Zyngier
2018-05-30 15:58 ` [PATCH v2 00/17] arm64 SSBD (aka Spectre-v4) mitigation Will Deacon
2018-05-31 16:41 ` Catalin Marinas
2018-05-31 16:55 ` Marc Zyngier
2018-06-09 13:16 ` Jon Masters
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