[PATCH v4 01/18] arm64: Add missing APTable and TCR_ELx.HPD masks
From: Marc Zyngier <maz@kernel.org>
Date: 2024-08-20 10:40:06
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
Although Linux doesn't make use of hierarchical permissions (TFFT!), KVM needs to know where the various bits related to this feature live in the TCR_ELx registers as well as in the page tables. Add the missing bits. Signed-off-by: Marc Zyngier <maz@kernel.org> --- arch/arm64/include/asm/kvm_arm.h | 1 + arch/arm64/include/asm/pgtable-hwdef.h | 9 +++++++++ 2 files changed, 10 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
index d81cc746e0eb..109a85ee6910 100644
--- a/arch/arm64/include/asm/kvm_arm.h
+++ b/arch/arm64/include/asm/kvm_arm.h@@ -107,6 +107,7 @@ /* TCR_EL2 Registers bits */ #define TCR_EL2_DS (1UL << 32) #define TCR_EL2_RES1 ((1U << 31) | (1 << 23)) +#define TCR_EL2_HPD (1 << 24) #define TCR_EL2_TBI (1 << 20) #define TCR_EL2_PS_SHIFT 16 #define TCR_EL2_PS_MASK (7 << TCR_EL2_PS_SHIFT)
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 1f60aa1bc750..07dfbdb14bab 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h@@ -204,6 +204,11 @@ */ #define PTE_S2_MEMATTR(t) (_AT(pteval_t, (t)) << 2) +/* + * Hierarchical permission for Stage-1 tables + */ +#define S1_TABLE_AP (_AT(pmdval_t, 3) << 61) + /* * Highest possible physical address supported. */
@@ -298,6 +303,10 @@ #define TCR_TBI1 (UL(1) << 38) #define TCR_HA (UL(1) << 39) #define TCR_HD (UL(1) << 40) +#define TCR_HPD0_SHIFT 41 +#define TCR_HPD0 (UL(1) << TCR_HPD0_SHIFT) +#define TCR_HPD1_SHIFT 42 +#define TCR_HPD1 (UL(1) << TCR_HPD1_SHIFT) #define TCR_TBID0 (UL(1) << 51) #define TCR_TBID1 (UL(1) << 52) #define TCR_NFD0 (UL(1) << 53)
--
2.39.2