From: Marc Zyngier <maz@kernel.org>
To: Oliver Upton <oliver.upton@linux.dev>
Cc: kvmarm@lists.linux.dev, kvm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Quentin Perret <qperret@google.com>,
Will Deacon <will@kernel.org>, James Morse <james.morse@arm.com>,
Fuad Tabba <tabba@google.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>
Subject: Re: (subset) [PATCH v3 00/17] KVM: arm64: Allow using VHE in the nVHE hypervisor
Date: Wed, 14 Jun 2023 17:16:05 +0100 [thread overview]
Message-ID: <7499530a98f6f9e9532f4cf72921a1ad@kernel.org> (raw)
In-Reply-To: <168675651876.3255755.11650251411681563144.b4-ty@linux.dev>
On 2023-06-14 16:31, Oliver Upton wrote:
> On Fri, 9 Jun 2023 17:21:43 +0100, Marc Zyngier wrote:
>> KVM (on ARMv8.0) and pKVM (on all revisions of the architecture) use
>> the split hypervisor model that makes the EL2 code more or less
>> standalone. In the later case, we totally ignore the VHE mode and
>> stick with the good old v8.0 EL2 setup.
>>
>> This is all good, but means that the EL2 code is limited in what it
>> can do with its own address space. This series proposes to remove this
>> limitation and to allow VHE to be used even with the split hypervisor
>> model. This has some potential isolation benefits[1], and eventually
>> allow systems that do not support HCR_EL2.E2H==0 to run pKVM.
>>
>> [...]
>
> I decided we should probably should have this in -next for a bit before
> sending a pull request. We can shove any fixes on top as needed.
Awesome, thanks. There's already one such fix on your way!
Cheers,
M.
--
Jazz is not dead. It just smells funny...
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-06-14 16:16 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-09 16:21 [PATCH v3 00/17] KVM: arm64: Allow using VHE in the nVHE hypervisor Marc Zyngier
2023-06-09 16:21 ` [PATCH v3 01/17] KVM: arm64: Drop is_kernel_in_hyp_mode() from __invalidate_icache_guest_page() Marc Zyngier
2023-06-13 8:20 ` Shaoqin Huang
2023-06-09 16:21 ` [PATCH v3 02/17] arm64: Prevent the use of is_kernel_in_hyp_mode() in hypervisor code Marc Zyngier
2023-06-12 16:59 ` Catalin Marinas
2023-06-13 8:25 ` Shaoqin Huang
2023-06-09 16:21 ` [PATCH v3 03/17] arm64: Turn kaslr_feature_override into a generic SW feature override Marc Zyngier
2023-06-12 17:16 ` Catalin Marinas
2023-06-14 7:26 ` Shaoqin Huang
2023-06-09 16:21 ` [PATCH v3 04/17] arm64: Add KVM_HVHE capability and has_hvhe() predicate Marc Zyngier
2023-06-12 17:24 ` Catalin Marinas
2023-06-14 7:32 ` Shaoqin Huang
2023-06-14 7:35 ` Shaoqin Huang
2023-06-14 16:06 ` Marc Zyngier
2023-06-09 16:21 ` [PATCH v3 05/17] arm64: Don't enable VHE for the kernel if OVERRIDE_HVHE is set Marc Zyngier
2023-06-12 19:12 ` Catalin Marinas
2023-06-12 19:20 ` Oliver Upton
2023-06-09 16:21 ` [PATCH v3 06/17] arm64: Allow EL1 physical timer access when running VHE Marc Zyngier
2023-06-12 19:14 ` Catalin Marinas
2023-06-09 16:21 ` [PATCH v3 07/17] arm64: Use CPACR_EL1 format to set CPTR_EL2 when E2H is set Marc Zyngier
2023-06-12 19:15 ` Catalin Marinas
2023-06-09 16:21 ` [PATCH v3 08/17] KVM: arm64: Remove alternatives from sysreg accessors in VHE hypervisor context Marc Zyngier
2023-06-09 16:21 ` [PATCH v3 09/17] KVM: arm64: Key use of VHE instructions in nVHE code off ARM64_KVM_HVHE Marc Zyngier
2023-06-13 9:57 ` Shaoqin Huang
2023-06-09 16:21 ` [PATCH v3 10/17] KVM: arm64: Force HCR_EL2.E2H when ARM64_KVM_HVHE is set Marc Zyngier
2023-06-09 16:21 ` [PATCH v3 11/17] KVM: arm64: Disable TTBR1_EL2 when using ARM64_KVM_HVHE Marc Zyngier
2023-06-09 16:21 ` [PATCH v3 12/17] KVM: arm64: Adjust EL2 stage-1 leaf AP bits when ARM64_KVM_HVHE is set Marc Zyngier
2023-06-09 16:21 ` [PATCH v3 13/17] KVM: arm64: Rework CPTR_EL2 programming for HVHE configuration Marc Zyngier
2023-06-09 16:21 ` [PATCH v3 14/17] KVM: arm64: Program the timer traps with VHE layout in hVHE mode Marc Zyngier
2023-06-09 16:21 ` [PATCH v3 15/17] KVM: arm64: Force HCR_E2H in guest context when ARM64_KVM_HVHE is set Marc Zyngier
2023-06-09 16:21 ` [PATCH v3 16/17] arm64: Allow arm64_sw.hvhe on command line Marc Zyngier
2023-06-12 19:16 ` Catalin Marinas
2023-06-09 16:22 ` [PATCH v3 17/17] KVM: arm64: Terrible timer hack for M1 with hVHE Marc Zyngier
2023-06-09 16:54 ` [PATCH v3 00/17] KVM: arm64: Allow using VHE in the nVHE hypervisor Marc Zyngier
2023-06-14 15:31 ` (subset) " Oliver Upton
2023-06-14 16:16 ` Marc Zyngier [this message]
2024-07-10 6:45 ` Tangnianyao
2024-07-10 8:51 ` 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=7499530a98f6f9e9532f4cf72921a1ad@kernel.org \
--to=maz@kernel.org \
--cc=james.morse@arm.com \
--cc=kvm@vger.kernel.org \
--cc=kvmarm@lists.linux.dev \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=oliver.upton@linux.dev \
--cc=qperret@google.com \
--cc=suzuki.poulose@arm.com \
--cc=tabba@google.com \
--cc=will@kernel.org \
--cc=yuzenghui@huawei.com \
/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;
as well as URLs for NNTP newsgroup(s).