diff options
| author |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2019-07-10 23:24:10 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2019-07-10 23:24:10 -0700 |
| commit | 597473720f4dc69749542bfcfed4a927a43d935e (patch) | |
| tree | 711bf773910fb93d1dd9120c633adc807685e0d8 /arch/arm64/kernel/head.S | |
| parent | Input: atmel_mxt_ts - fix leak in mxt_update_cfg() (diff) | |
| parent | Input: gpio_keys_polled - allow specifying name of input device (diff) | |
| download | linux-dev-597473720f4dc69749542bfcfed4a927a43d935e.tar.xz linux-dev-597473720f4dc69749542bfcfed4a927a43d935e.zip | |
Merge branch 'next' into for-linus
Prepare input updates for 5.3 merge window.
Diffstat (limited to 'arch/arm64/kernel/head.S')
| -rw-r--r-- | arch/arm64/kernel/head.S | 50 |
1 files changed, 43 insertions, 7 deletions
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index 4471f570a295..eecf7927dab0 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -31,6 +31,7 @@ #include <asm/cache.h> #include <asm/cputype.h> #include <asm/elf.h> +#include <asm/image.h> #include <asm/kernel-pgtable.h> #include <asm/kvm_arm.h> #include <asm/memory.h> @@ -91,7 +92,7 @@ _head: .quad 0 // reserved .quad 0 // reserved .quad 0 // reserved - .ascii "ARM\x64" // Magic number + .ascii ARM64_IMAGE_MAGIC // Magic number #ifdef CONFIG_EFI .long pe_header - _head // Offset to the PE header. @@ -318,6 +319,19 @@ __create_page_tables: adrp x0, idmap_pg_dir adrp x3, __idmap_text_start // __pa(__idmap_text_start) +#ifdef CONFIG_ARM64_USER_VA_BITS_52 + mrs_s x6, SYS_ID_AA64MMFR2_EL1 + and x6, x6, #(0xf << ID_AA64MMFR2_LVA_SHIFT) + mov x5, #52 + cbnz x6, 1f +#endif + mov x5, #VA_BITS +1: + adr_l x6, vabits_user + str x5, [x6] + dmb sy + dc ivac, x6 // Invalidate potentially stale cache line + /* * VA_BITS may be too small to allow for an ID mapping to be created * that covers system RAM if that is located sufficiently high in the @@ -461,6 +475,7 @@ ENDPROC(__primary_switched) ENTRY(kimage_vaddr) .quad _text - TEXT_OFFSET +EXPORT_SYMBOL(kimage_vaddr) /* * If we're fortunate enough to boot at EL2, ensure that the world is @@ -496,10 +511,9 @@ ENTRY(el2_setup) #endif /* Hyp configuration. */ - mov x0, #HCR_RW // 64-bit EL1 + mov_q x0, HCR_HOST_NVHE_FLAGS cbz x2, set_hcr - orr x0, x0, #HCR_TGE // Enable Host Extensions - orr x0, x0, #HCR_E2H + mov_q x0, HCR_HOST_VHE_FLAGS set_hcr: msr hcr_el2, x0 isb @@ -525,8 +539,7 @@ set_hcr: /* GICv3 system register access */ mrs x0, id_aa64pfr0_el1 ubfx x0, x0, #24, #4 - cmp x0, #1 - b.ne 3f + cbz x0, 3f mrs_s x0, SYS_ICC_SRE_EL2 orr x0, x0, #ICC_SRE_EL2_SRE // Set ICC_SRE_EL2.SRE==1 @@ -707,6 +720,7 @@ secondary_startup: /* * Common entry point for secondary CPUs. */ + bl __cpu_secondary_check52bitva bl __cpu_setup // initialise processor adrp x1, swapper_pg_dir bl __enable_mmu @@ -769,6 +783,7 @@ ENTRY(__enable_mmu) phys_to_ttbr x1, x1 phys_to_ttbr x2, x2 msr ttbr0_el1, x2 // load TTBR0 + offset_ttbr1 x1 msr ttbr1_el1, x1 // load TTBR1 isb msr sctlr_el1, x0 @@ -784,9 +799,30 @@ ENTRY(__enable_mmu) ret ENDPROC(__enable_mmu) +ENTRY(__cpu_secondary_check52bitva) +#ifdef CONFIG_ARM64_USER_VA_BITS_52 + ldr_l x0, vabits_user + cmp x0, #52 + b.ne 2f + + mrs_s x0, SYS_ID_AA64MMFR2_EL1 + and x0, x0, #(0xf << ID_AA64MMFR2_LVA_SHIFT) + cbnz x0, 2f + + update_early_cpu_boot_status \ + CPU_STUCK_IN_KERNEL | CPU_STUCK_REASON_52_BIT_VA, x0, x1 +1: wfe + wfi + b 1b + +#endif +2: ret +ENDPROC(__cpu_secondary_check52bitva) + __no_granule_support: /* Indicate that this CPU can't boot and is stuck in the kernel */ - update_early_cpu_boot_status CPU_STUCK_IN_KERNEL, x1, x2 + update_early_cpu_boot_status \ + CPU_STUCK_IN_KERNEL | CPU_STUCK_REASON_NO_GRAN, x1, x2 1: wfe wfi |