From: David Brazdil <dbrazdil@google.com>
To: Marc Zyngier <maz@kernel.org>
Cc: kvmarm@lists.cs.columbia.edu,
Catalin Marinas <catalin.marinas@arm.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
linux-kernel@vger.kernel.org, Will Deacon <will@kernel.org>,
Tejun Heo <tj@kernel.org>, Dennis Zhou <dennis@kernel.org>,
linux-doc@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>,
kernel-team@android.com, linux-arm-kernel@lists.infradead.org,
Christoph Lameter <cl@linux.com>,
Sudeep Holla <sudeep.holla@arm.com>
Subject: Re: [PATCH v4 00/26] Opt-in always-on nVHE hypervisor
Date: Tue, 8 Dec 2020 19:14:47 +0000 [thread overview]
Message-ID: <20201208191447.47idqf7n2v3hvrdg@google.com> (raw)
In-Reply-To: <160702322202.1501317.9696987088711766533.b4-ty@kernel.org>
Hey Marc,
On Thu, Dec 03, 2020 at 07:23:19PM +0000, Marc Zyngier wrote:
> On Wed, 2 Dec 2020 18:40:56 +0000, David Brazdil wrote:
> > As we progress towards being able to keep guest state private to the
> > host running nVHE hypervisor, this series allows the hypervisor to
> > install itself on newly booted CPUs before the host is allowed to run
> > on them.
> >
> > All functionality described below is opt-in, guarded by an early param
> > 'kvm-arm.mode=protected'. Future patches specific to the new protected
> > mode should be hidden behind the same param.
> >
> > [...]
>
> Applied to kvm-arm64/psci-relay, thanks!
>
> Note that although I pushed it to -next, I still need people to
> eyeball it and give it some Acks. The commit-IDs below will
> thus change as I apply tags, if any.
>
I'm looking at -next and I think the merge with Mark Rutland's el2_setup
refactor didn't go as planned.
The `#ifdef CONFIG_ARM64_VHE` section needs to cover everything between
init_el2 and init_el2_nvhe. Currently the code falls through into VHE init
when CONFIG_ARM64_VHE is not set.
Here's the snippet:
SYM_INNER_LABEL(init_el2, SYM_L_LOCAL)
#ifdef CONFIG_ARM64_VHE
/*
* Check for VHE being present. x2 being non-zero indicates that we
* do have VHE, and that the kernel is intended to run at EL2.
*/
mrs x2, id_aa64mmfr1_el1
ubfx x2, x2, #ID_AA64MMFR1_VHE_SHIFT, #4
cbz x2, init_el2_nvhe
#endif // <--- THIS
<... initialize VHE ...>
msr elr_el2, lr
mov w0, #BOOT_CPU_MODE_EL2
eret
// <--- NEEDS TO MOVE HERE
SYM_INNER_LABEL(init_el2_nvhe, SYM_L_LOCAL)
<... initialize nVHE ...>
-David
next prev parent reply other threads:[~2020-12-08 20:32 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-02 18:40 David Brazdil
2020-12-02 18:40 ` [PATCH v4 01/26] kvm: arm64: Add kvm-arm.mode early kernel parameter David Brazdil
2020-12-02 18:40 ` [PATCH v4 02/26] kvm: arm64: Add ARM64_KVM_PROTECTED_MODE CPU capability David Brazdil
2020-12-02 18:40 ` [PATCH v4 03/26] psci: Support psci_ops.get_version for v0.1 David Brazdil
2020-12-02 18:41 ` [PATCH v4 04/26] psci: Split functions to v0.1 and v0.2+ variants David Brazdil
2020-12-03 10:42 ` Mark Rutland
2020-12-02 18:41 ` [PATCH v4 05/26] psci: Replace psci_function_id array with a struct David Brazdil
2020-12-03 10:43 ` Mark Rutland
2020-12-02 18:41 ` [PATCH v4 06/26] psci: Add accessor for psci_0_1_function_ids David Brazdil
2020-12-03 10:47 ` Mark Rutland
2020-12-03 10:51 ` David Brazdil
2020-12-02 18:41 ` [PATCH v4 07/26] arm64: Make cpu_logical_map() take unsigned int David Brazdil
2020-12-02 18:41 ` [PATCH v4 08/26] arm64: Extract parts of el2_setup into a macro David Brazdil
2020-12-02 18:41 ` [PATCH v4 09/26] kvm: arm64: Remove vector_ptr param of hyp-init David Brazdil
2020-12-02 18:41 ` [PATCH v4 10/26] kvm: arm64: Move hyp-init params to a per-CPU struct David Brazdil
2020-12-02 18:41 ` [PATCH v4 11/26] kvm: arm64: Init MAIR/TCR_EL2 from params struct David Brazdil
2020-12-02 18:41 ` [PATCH v4 12/26] kvm: arm64: Add .hyp.data..ro_after_init ELF section David Brazdil
2020-12-02 18:41 ` [PATCH v4 13/26] kvm: arm64: Support per_cpu_ptr in nVHE hyp code David Brazdil
2020-12-02 18:41 ` [PATCH v4 14/26] kvm: arm64: Create nVHE copy of cpu_logical_map David Brazdil
2020-12-02 18:41 ` [PATCH v4 15/26] kvm: arm64: Add SMC handler in nVHE EL2 David Brazdil
2020-12-03 13:31 ` Marc Zyngier
2020-12-02 18:41 ` [PATCH v4 16/26] kvm: arm64: Bootstrap PSCI " David Brazdil
2020-12-03 10:55 ` Mark Rutland
2020-12-03 13:46 ` Marc Zyngier
2020-12-02 18:41 ` [PATCH v4 17/26] kvm: arm64: Add offset for hyp VA <-> PA conversion David Brazdil
2020-12-07 22:29 ` Qian Cai
2020-12-08 10:08 ` David Brazdil
2020-12-02 18:41 ` [PATCH v4 18/26] kvm: arm64: Forward safe PSCI SMCs coming from host David Brazdil
2020-12-02 18:41 ` [PATCH v4 19/26] kvm: arm64: Extract __do_hyp_init into a helper function David Brazdil
2020-12-02 18:41 ` [PATCH v4 20/26] kvm: arm64: Add function to enter host from KVM nVHE hyp code David Brazdil
2020-12-02 18:41 ` [PATCH v4 21/26] kvm: arm64: Intercept host's CPU_ON SMCs David Brazdil
2020-12-02 18:41 ` [PATCH v4 22/26] kvm: arm64: Intercept host's CPU_SUSPEND PSCI SMCs David Brazdil
2020-12-02 18:41 ` [PATCH v4 23/26] kvm: arm64: Intercept host's SYSTEM_SUSPEND " David Brazdil
2020-12-02 18:41 ` [PATCH v4 24/26] kvm: arm64: Keep nVHE EL2 vector installed David Brazdil
2020-12-02 18:41 ` [PATCH v4 25/26] kvm: arm64: Trap host SMCs in protected mode David Brazdil
2020-12-02 18:41 ` [PATCH v4 26/26] kvm: arm64: Fix EL2 mode availability checks David Brazdil
2020-12-03 19:23 ` [PATCH v4 00/26] Opt-in always-on nVHE hypervisor Marc Zyngier
2020-12-08 19:14 ` David Brazdil [this message]
2020-12-08 20:12 ` Marc Zyngier
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201208191447.47idqf7n2v3hvrdg@google.com \
--to=dbrazdil@google.com \
--cc=catalin.marinas@arm.com \
--cc=cl@linux.com \
--cc=corbet@lwn.net \
--cc=dennis@kernel.org \
--cc=kernel-team@android.com \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lorenzo.pieralisi@arm.com \
--cc=maz@kernel.org \
--cc=sudeep.holla@arm.com \
--cc=tj@kernel.org \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®