From: Will Deacon <will@kernel.org>
To: Marc Zyngier <maz@kernel.org>
Cc: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org,
Peng Liang <liangpeng10@huawei.com>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
kernel-team@android.com
Subject: Re: [PATCH 3/3] KVM: arm64: Handle SCXTNUM_ELx traps
Date: Thu, 5 Nov 2020 22:50:42 +0000 [thread overview]
Message-ID: <20201105225041.GF8842@willie-the-truck> (raw)
In-Reply-To: <20201103171445.271195-4-maz@kernel.org>
On Tue, Nov 03, 2020 at 05:14:45PM +0000, Marc Zyngier wrote:
> As the kernel never sets HCR_EL2.EnSCXT, accesses to SCXTNUM_ELx
> will trap to EL2. Let's handle that as gracefully as possible
> by injecting an UNDEF exception into the guest. This is consistent
> with the guest's view of ID_AA64PFR0_EL1.CSV2 being at most 1.
>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
> arch/arm64/include/asm/sysreg.h | 4 ++++
> arch/arm64/kvm/sys_regs.c | 4 ++++
> 2 files changed, 8 insertions(+)
Acked-by: Will Deacon <will@kernel.org>
Will
next prev parent reply other threads:[~2020-11-05 22:50 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-03 17:14 [PATCH 0/3] KVM: arm64: Another set of CSV2-related fixes Marc Zyngier
2020-11-03 17:14 ` [PATCH 1/3] KVM: arm64: Allow setting of ID_AA64PFR0_EL1.CSV2 from userspace Marc Zyngier
2020-11-05 22:44 ` Will Deacon
2020-11-06 9:57 ` Marc Zyngier
2020-11-03 17:14 ` [PATCH 2/3] KVM: arm64: Rename access_amu() to undef_access() Marc Zyngier
2020-11-05 22:50 ` Will Deacon
2020-11-06 10:54 ` Marc Zyngier
2020-11-03 17:14 ` [PATCH 3/3] KVM: arm64: Handle SCXTNUM_ELx traps Marc Zyngier
2020-11-05 22:50 ` Will Deacon [this message]
2020-11-12 22:21 [PATCH 0/3] KVM/arm64 fixes for 5.10, take #3 Marc Zyngier
2020-11-12 22:21 ` [PATCH 3/3] KVM: arm64: Handle SCXTNUM_ELx traps Marc Zyngier
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