From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Subject: [PATCH 4/5] KVM: arm64: Limit the debug architecture to ARMv8.0
Date: Sun, 16 Feb 2020 18:53:23 +0000 [thread overview]
Message-ID: <20200216185324.32596-5-maz@kernel.org> (raw)
In-Reply-To: <20200216185324.32596-1-maz@kernel.org>
Let's not pretend we support anything but ARMv8.0 as far as the
debug architecture is concerned.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kvm/sys_regs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 06b2d0dc6c73..43087b50a211 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1094,6 +1094,9 @@ static u64 read_id_reg(const struct kvm_vcpu *vcpu,
FEATURE(ID_AA64ISAR1_GPI));
break;
case SYS_ID_AA64DFR0_EL1:
+ /* Limit debug to ARMv8.0 */
+ val &= ~FEATURE(ID_AA64DFR0_DEBUGVER);
+ val |= FIELD_PREP(FEATURE(ID_AA64DFR0_DEBUGVER), 6);
/* Limit PMU to ARMv8.1 */
val &= ~FEATURE(ID_AA64DFR0_PMUVER);
val |= FIELD_PREP(FEATURE(ID_AA64DFR0_PMUVER), 4);
--
2.20.1
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next prev parent reply other threads:[~2020-02-16 18:53 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-16 18:53 [PATCH 0/5] Random debug/PMU fixes for 5.6 Marc Zyngier
2020-02-16 18:53 ` [PATCH 1/5] KVM: arm64: Fix missing RES1 in emulation of DBGBIDR Marc Zyngier
2020-02-18 17:43 ` James Morse
2020-02-18 18:01 ` Robin Murphy
2020-02-18 18:15 ` James Morse
2020-02-16 18:53 ` [PATCH 2/5] KVM: arm64: Refactor filtering of ID registers Marc Zyngier
2020-02-20 14:12 ` Andre Przywara
2020-02-16 18:53 ` [PATCH 3/5] kvm: arm64: Limit PMU version to ARMv8.1 Marc Zyngier
2020-02-18 17:43 ` James Morse
2020-02-19 9:46 ` Marc Zyngier
2020-02-19 10:18 ` James Morse
2020-02-19 11:14 ` Marc Zyngier
2020-02-16 18:53 ` Marc Zyngier [this message]
2020-02-18 17:45 ` [PATCH 4/5] KVM: arm64: Limit the debug architecture to ARMv8.0 James Morse
2020-02-16 18:53 ` [PATCH 5/5] KVM: arm64: Upgrade PMU support to ARMv8.4 Marc Zyngier
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