From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org
Cc: James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Oliver Upton <oliver.upton@linux.dev>,
Zenghui Yu <yuzenghui@huawei.com>,
Joey Gouly <joey.gouly@arm.com>
Subject: [PATCH 1/4] KVM: arm64: nv: Add TCPAC/TTA to CPTR->CPACR conversion helper
Date: Tue, 4 Jun 2024 14:05:50 +0100 [thread overview]
Message-ID: <20240604130553.199981-2-maz@kernel.org> (raw)
In-Reply-To: <20240604130553.199981-1-maz@kernel.org>
We are missing the propagation of CPTR_EL2.{TCPAC,TTA} into
the CPACR format. Make sure we preserve these bits.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/include/asm/kvm_nested.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/kvm_nested.h b/arch/arm64/include/asm/kvm_nested.h
index 5d55f76254c3..07cf6c64f0d0 100644
--- a/arch/arm64/include/asm/kvm_nested.h
+++ b/arch/arm64/include/asm/kvm_nested.h
@@ -32,7 +32,7 @@ static inline u64 translate_tcr_el2_to_tcr_el1(u64 tcr)
static inline u64 translate_cptr_el2_to_cpacr_el1(u64 cptr_el2)
{
- u64 cpacr_el1 = 0;
+ u64 cpacr_el1 = CPACR_ELx_RES1;
if (cptr_el2 & CPTR_EL2_TTA)
cpacr_el1 |= CPACR_ELx_TTA;
@@ -41,6 +41,8 @@ static inline u64 translate_cptr_el2_to_cpacr_el1(u64 cptr_el2)
if (!(cptr_el2 & CPTR_EL2_TZ))
cpacr_el1 |= CPACR_ELx_ZEN;
+ cpacr_el1 |= cptr_el2 & (CPTR_EL2_TCPAC | CPTR_EL2_TAM);
+
return cpacr_el1;
}
--
2.39.2
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next prev parent reply other threads:[~2024-06-04 13:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-04 13:05 [PATCH 0/4] KVM: arm64: nv: Add CPTR_EL2 handling Marc Zyngier
2024-06-04 13:05 ` Marc Zyngier [this message]
2024-06-04 13:05 ` [PATCH 2/4] KVM: arm64: nv: Add trap description for CPTR_EL2 Marc Zyngier
2024-06-04 13:05 ` [PATCH 3/4] KVM: arm64: nv: Add additional trap setup " Marc Zyngier
2024-06-04 13:05 ` [PATCH 4/4] KVM: arm64: nv: Handle CPACR_EL1 traps Marc Zyngier
2024-06-04 18:49 ` [PATCH 0/4] KVM: arm64: nv: Add CPTR_EL2 handling Oliver Upton
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