From: Marc Zyngier <maz@kernel.org>
To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Cc: kernel-team@android.com, James Morse <james.morse@arm.com>,
stable@vger.kernel.org,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: [PATCH v2 1/9] KVM: arm64: Introduce handling of AArch32 TTBCR2 traps
Date: Tue, 10 Nov 2020 13:36:11 +0000 [thread overview]
Message-ID: <20201110133619.451157-2-maz@kernel.org> (raw)
In-Reply-To: <20201110133619.451157-1-maz@kernel.org>
ARMv8.2 introduced TTBCR2, which shares TCR_EL1 with TTBCR.
Gracefully handle traps to this register when HCR_EL2.TVM is set.
Cc: stable@vger.kernel.org
Reported-by: James Morse <james.morse@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/include/asm/kvm_host.h | 1 +
arch/arm64/kvm/sys_regs.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 7a1faf917f3c..803cb2427b54 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -212,6 +212,7 @@ enum vcpu_sysreg {
#define c2_TTBR1 (TTBR1_EL1 * 2) /* Translation Table Base Register 1 */
#define c2_TTBR1_high (c2_TTBR1 + 1) /* TTBR1 top 32 bits */
#define c2_TTBCR (TCR_EL1 * 2) /* Translation Table Base Control R. */
+#define c2_TTBCR2 (c2_TTBCR + 1) /* Translation Table Base Control R. 2 */
#define c3_DACR (DACR32_EL2 * 2)/* Domain Access Control Register */
#define c5_DFSR (ESR_EL1 * 2) /* Data Fault Status Register */
#define c5_IFSR (IFSR32_EL2 * 2)/* Instruction Fault Status Register */
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 26c7c25f8a6d..afdf18d694cb 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1925,6 +1925,7 @@ static const struct sys_reg_desc cp15_regs[] = {
{ Op1( 0), CRn( 2), CRm( 0), Op2( 0), access_vm_reg, NULL, c2_TTBR0 },
{ Op1( 0), CRn( 2), CRm( 0), Op2( 1), access_vm_reg, NULL, c2_TTBR1 },
{ Op1( 0), CRn( 2), CRm( 0), Op2( 2), access_vm_reg, NULL, c2_TTBCR },
+ { Op1( 0), CRn( 2), CRm( 0), Op2( 3), access_vm_reg, NULL, c2_TTBCR2 },
{ Op1( 0), CRn( 3), CRm( 0), Op2( 0), access_vm_reg, NULL, c3_DACR },
{ Op1( 0), CRn( 5), CRm( 0), Op2( 0), access_vm_reg, NULL, c5_DFSR },
{ Op1( 0), CRn( 5), CRm( 0), Op2( 1), access_vm_reg, NULL, c5_IFSR },
--
2.28.0
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next prev parent reply other threads:[~2020-11-10 13:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-10 13:36 [PATCH v2 0/9] KVM: arm64: Kill the copro array Marc Zyngier
2020-11-10 13:36 ` Marc Zyngier [this message]
2020-11-10 13:36 ` [PATCH v2 2/9] KVM: arm64: Move AArch32 exceptions over to AArch64 sysregs Marc Zyngier
2020-11-10 13:36 ` [PATCH v2 3/9] KVM: arm64: Add AArch32 mapping annotation Marc Zyngier
2020-11-10 13:36 ` [PATCH v2 4/9] KVM: arm64: Map AArch32 cp15 register to AArch64 sysregs Marc Zyngier
2020-11-10 13:36 ` [PATCH v2 5/9] KVM: arm64: Map AArch32 cp14 " Marc Zyngier
2020-11-10 13:36 ` [PATCH v2 6/9] KVM: arm64: Drop is_32bit trap attribute Marc Zyngier
2020-11-10 13:36 ` [PATCH v2 7/9] KVM: arm64: Drop is_aarch32 " Marc Zyngier
2020-11-10 13:36 ` [PATCH v2 8/9] KVM: arm64: Drop legacy copro shadow register Marc Zyngier
2020-11-10 13:36 ` [PATCH v2 9/9] KVM: arm64: Drop kvm_coproc.h Marc Zyngier
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