From: Marc Zyngier <maz@kernel.org>
To: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: Andre Przywara <andre.przywara@arm.com>,
Will Deacon <will@kernel.org>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
kvm@vger.kernel.org, kvmarm@lists.linux.dev
Subject: Re: [PATCH kvmtool v3 6/6] arm64: Generate HYP timer interrupt specifiers
Date: Mon, 04 Aug 2025 19:15:10 +0100 [thread overview]
Message-ID: <878qjzt0lt.wl-maz@kernel.org> (raw)
In-Reply-To: <aJDIG8cJQjzbwj3w@raptor>
On Mon, 04 Aug 2025 15:47:55 +0100,
Alexandru Elisei <alexandru.elisei@arm.com> wrote:
>
> KVM doesn't allow FEAT_VHE and FEAT_E2H0 to coexist (in
> nested.c::limit_nv_id_reg()), to force E2H to be RES0. Assuming my interpretion
> is correct, shouldn't the check be:
>
> if (!kvm->cfg.arch.nested_virt || kvm->cfg.arch.e2h0)
> nr--;
>
And yet KVM exposes that timer, irrespective of FEAT_VHE. Probably
something that should be addressed.
M.
--
Jazz isn't dead. It just smells funny.
next prev parent reply other threads:[~2025-08-04 18:15 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-29 9:57 [PATCH kvmtool v3 0/6] arm64: Nested virtualization support Andre Przywara
2025-07-29 9:57 ` [PATCH kvmtool v3 1/6] Sync kernel UAPI headers with v6.16 Andre Przywara
2025-07-29 9:57 ` [PATCH kvmtool v3 2/6] arm64: Initial nested virt support Andre Przywara
2025-08-04 14:41 ` Alexandru Elisei
2025-08-04 17:45 ` Marc Zyngier
2025-09-16 12:15 ` Andre Przywara
2025-07-29 9:57 ` [PATCH kvmtool v3 3/6] arm64: nested: add support for setting maintenance IRQ Andre Przywara
2025-08-04 14:43 ` Alexandru Elisei
2025-08-04 17:51 ` Marc Zyngier
2025-09-16 12:16 ` Andre Przywara
2025-07-29 9:57 ` [PATCH kvmtool v3 4/6] arm64: add counter offset control Andre Przywara
2025-08-04 14:45 ` Alexandru Elisei
2025-08-04 17:57 ` Marc Zyngier
2025-09-16 12:17 ` Andre Przywara
2025-07-29 9:57 ` [PATCH kvmtool v3 5/6] arm64: add FEAT_E2H0 support Andre Przywara
2025-08-04 14:45 ` Alexandru Elisei
2025-08-04 18:11 ` Marc Zyngier
2025-07-29 9:57 ` [PATCH kvmtool v3 6/6] arm64: Generate HYP timer interrupt specifiers Andre Przywara
2025-08-04 14:47 ` Alexandru Elisei
2025-08-04 18:15 ` Marc Zyngier [this message]
2025-09-23 16:21 ` Andre Przywara
2025-09-23 18:16 ` Marc Zyngier
2025-07-29 10:03 ` [PATCH kvmtool v3 0/6] arm64: Nested virtualization support Marc Zyngier
2025-09-08 13:25 ` Will Deacon
2025-09-16 8:51 ` Andre Przywara
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