From: Will Deacon <will@kernel.org>
To: David Brazdil <dbrazdil@google.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
linux-kernel@vger.kernel.org, James Morse <james.morse@arm.com>,
linux-arm-kernel@lists.infradead.org,
Marc Zyngier <maz@kernel.org>, Tejun Heo <tj@kernel.org>,
Dennis Zhou <dennis@kernel.org>, Christoph Lameter <cl@linux.com>,
kernel-team@android.com, kvmarm@lists.cs.columbia.edu,
Julien Thierry <julien.thierry.kdev@gmail.com>
Subject: Re: [PATCH v4 07/10] kvm: arm64: Duplicate arm64_ssbd_callback_required for nVHE hyp
Date: Tue, 29 Sep 2020 18:37:28 +0100 [thread overview]
Message-ID: <20200929173728.GD14317@willie-the-truck> (raw)
In-Reply-To: <20200922204910.7265-8-dbrazdil@google.com>
On Tue, Sep 22, 2020 at 09:49:07PM +0100, David Brazdil wrote:
> Hyp keeps track of which cores require SSBD callback by accessing a
> kernel-proper global variable. Create an nVHE symbol of the same name
> and copy the value from kernel proper to nVHE as KVM is being enabled
> on a core.
>
> Done in preparation for separating percpu memory owned by kernel
> proper and nVHE.
>
> Signed-off-by: David Brazdil <dbrazdil@google.com>
> ---
> arch/arm64/include/asm/kvm_mmu.h | 14 +++++++++++++-
> arch/arm64/kernel/image-vars.h | 1 -
> arch/arm64/kvm/arm.c | 3 +++
> arch/arm64/kvm/hyp/nvhe/switch.c | 3 +++
> 4 files changed, 19 insertions(+), 2 deletions(-)
Acked-by: Will Deacon <will@kernel.org>
Marc: please take a look at for-next/ghostbusters on the arm64 tree, as
that has the patches which remove this stuff entirely. I had to rebase
the branch today because I screwed up some of the SoBs but the HEAD is
now stable at 780c083a8f84.
Will
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next prev parent reply other threads:[~2020-09-29 17:39 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 20:49 [PATCH v4 00/10] Independent per-CPU data section for nVHE David Brazdil
2020-09-22 20:49 ` [PATCH v4 01/10] kvm: arm64: Partially link nVHE hyp code, simplify HYPCOPY David Brazdil
2020-09-22 20:49 ` [PATCH v4 02/10] kvm: arm64: Move nVHE hyp namespace macros to hyp_image.h David Brazdil
2020-09-22 20:49 ` [PATCH v4 03/10] kvm: arm64: Only define __kvm_ex_table for CONFIG_KVM David Brazdil
2020-09-22 20:49 ` [PATCH v4 04/10] kvm: arm64: Remove __hyp_this_cpu_read David Brazdil
2020-09-29 17:30 ` Will Deacon
2020-09-22 20:49 ` [PATCH v4 05/10] kvm: arm64: Remove hyp_adr/ldr_this_cpu David Brazdil
2020-09-29 17:34 ` Will Deacon
2020-09-29 17:46 ` Marc Zyngier
2020-09-22 20:49 ` [PATCH v4 06/10] kvm: arm64: Add helpers for accessing nVHE hyp per-cpu vars David Brazdil
2020-09-22 20:49 ` [PATCH v4 07/10] kvm: arm64: Duplicate arm64_ssbd_callback_required for nVHE hyp David Brazdil
2020-09-29 17:37 ` Will Deacon [this message]
2020-09-22 20:49 ` [PATCH v4 08/10] kvm: arm64: Create separate instances of kvm_host_data for VHE/nVHE David Brazdil
2020-09-22 20:49 ` [PATCH v4 09/10] kvm: arm64: Set up hyp percpu data for nVHE David Brazdil
2020-09-29 17:50 ` Will Deacon
2020-09-22 20:49 ` [PATCH v4 10/10] kvm: arm64: Remove unnecessary hyp mappings David Brazdil
2020-09-29 17:49 ` Will Deacon
2020-09-24 10:10 ` [PATCH v4 00/10] Independent per-CPU data section for nVHE Christopher Lameter
2020-10-02 8:19 ` Marc Zyngier
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