diff options
| author | Radha Mohan Chintakuntla <rchintakuntla@cavium.com> | 2014-03-07 12:49:25 +0400 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-03-13 15:22:36 +0400 |
| commit | 87366d8cf7b3f6dc34633938aa8766e5a390ce33 (patch) | |
| tree | 9af5603c6cf5627207b0b78a44777bdfde6a1f87 /arch/arm64 | |
| parent | 71fdb6bf61bf0692f004f9daf5650392c0cfe300 (diff) | |
| download | linux-87366d8cf7b3f6dc34633938aa8766e5a390ce33.tar.xz | |
arm64: Add boot time configuration of Intermediate Physical Address size
ARMv8 supports a range of physical address bit sizes. The PARange bits
from ID_AA64MMFR0_EL1 register are read during boot-time and the
intermediate physical address size bits are written in the translation
control registers (TCR_EL1 and VTCR_EL2).
There is no change in the VA bits and levels of translation.
Signed-off-by: Radha Mohan Chintakuntla <rchintakuntla@cavium.com>
Reviewed-by: Will Deacon <Will.deacon@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/kvm_arm.h | 15 | ||||
| -rw-r--r-- | arch/arm64/include/asm/pgtable-hwdef.h | 5 | ||||
| -rw-r--r-- | arch/arm64/kvm/hyp-init.S | 6 | ||||
| -rw-r--r-- | arch/arm64/mm/proc.S | 8 |
4 files changed, 21 insertions, 13 deletions
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 0eb398655378..21ef48d32ff2 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -106,7 +106,6 @@ /* VTCR_EL2 Registers bits */ #define VTCR_EL2_PS_MASK (7 << 16) -#define VTCR_EL2_PS_40B (2 << 16) #define VTCR_EL2_TG0_MASK (1 << 14) #define VTCR_EL2_TG0_4K (0 << 14) #define VTCR_EL2_TG0_64K (1 << 14) @@ -129,10 +128,9 @@ * 64kB pages (TG0 = 1) * 2 level page tables (SL = 1) */ -#define VTCR_EL2_FLAGS (VTCR_EL2_PS_40B | VTCR_EL2_TG0_64K | \ - VTCR_EL2_SH0_INNER | VTCR_EL2_ORGN0_WBWA | \ - VTCR_EL2_IRGN0_WBWA | VTCR_EL2_SL0_LVL1 | \ - VTCR_EL2_T0SZ_40B) +#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_64K | VTCR_EL2_SH0_INNER | \ + VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \ + VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B) #define VTTBR_X (38 - VTCR_EL2_T0SZ_40B) #else /* @@ -142,10 +140,9 @@ * 4kB pages (TG0 = 0) * 3 level page tables (SL = 1) */ -#define VTCR_EL2_FLAGS (VTCR_EL2_PS_40B | VTCR_EL2_TG0_4K | \ - VTCR_EL2_SH0_INNER | VTCR_EL2_ORGN0_WBWA | \ - VTCR_EL2_IRGN0_WBWA | VTCR_EL2_SL0_LVL1 | \ - VTCR_EL2_T0SZ_40B) +#define VTCR_EL2_FLAGS (VTCR_EL2_TG0_4K | VTCR_EL2_SH0_INNER | \ + VTCR_EL2_ORGN0_WBWA | VTCR_EL2_IRGN0_WBWA | \ + VTCR_EL2_SL0_LVL1 | VTCR_EL2_T0SZ_40B) #define VTTBR_X (37 - VTCR_EL2_T0SZ_40B) #endif diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index b1d2e26c3c88..f7af66b54cb2 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -100,9 +100,9 @@ #define PTE_HYP PTE_USER /* - * 40-bit physical address supported. + * Highest possible physical address supported. */ -#define PHYS_MASK_SHIFT (40) +#define PHYS_MASK_SHIFT (48) #define PHYS_MASK ((UL(1) << PHYS_MASK_SHIFT) - 1) /* @@ -122,7 +122,6 @@ #define TCR_SHARED ((UL(3) << 12) | (UL(3) << 28)) #define TCR_TG0_64K (UL(1) << 14) #define TCR_TG1_64K (UL(1) << 30) -#define TCR_IPS_40BIT (UL(2) << 32) #define TCR_ASID16 (UL(1) << 36) #define TCR_TBI0 (UL(1) << 37) diff --git a/arch/arm64/kvm/hyp-init.S b/arch/arm64/kvm/hyp-init.S index 2b0244d65c16..d968796f4b2d 100644 --- a/arch/arm64/kvm/hyp-init.S +++ b/arch/arm64/kvm/hyp-init.S @@ -68,6 +68,12 @@ __do_hyp_init: msr tcr_el2, x4 ldr x4, =VTCR_EL2_FLAGS + /* + * Read the PARange bits from ID_AA64MMFR0_EL1 and set the PS bits in + * VTCR_EL2. + */ + mrs x5, ID_AA64MMFR0_EL1 + bfi x4, x5, #16, #3 msr vtcr_el2, x4 mrs x4, mair_el1 diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index e0ef63cd05dc..e085ee6ef4e2 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -209,8 +209,14 @@ ENTRY(__cpu_setup) * Set/prepare TCR and TTBR. We use 512GB (39-bit) address range for * both user and kernel. */ - ldr x10, =TCR_TxSZ(VA_BITS) | TCR_FLAGS | TCR_IPS_40BIT | \ + ldr x10, =TCR_TxSZ(VA_BITS) | TCR_FLAGS | \ TCR_ASID16 | TCR_TBI0 | (1 << 31) + /* + * Read the PARange bits from ID_AA64MMFR0_EL1 and set the IPS bits in + * TCR_EL1. + */ + mrs x9, ID_AA64MMFR0_EL1 + bfi x10, x9, #32, #3 #ifdef CONFIG_ARM64_64K_PAGES orr x10, x10, TCR_TG0_64K orr x10, x10, TCR_TG1_64K |