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-rw-r--r--arch/arm64/Kconfig1
-rw-r--r--arch/arm64/include/asm/pgtable-prot.h1
-rw-r--r--arch/arm64/include/asm/pgtable.h21
-rw-r--r--arch/arm64/include/asm/sysreg.h82
-rw-r--r--arch/arm64/mm/fault.c24
-rw-r--r--arch/arm64/mm/mmu.c5
6 files changed, 70 insertions, 64 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 86f81b5afd95..e1ea69994e0f 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -24,6 +24,7 @@ config ARM64
select ARCH_HAS_KCOV
select ARCH_HAS_KEEPINITRD
select ARCH_HAS_MEMBARRIER_SYNC_CORE
+ select ARCH_HAS_PTE_DEVMAP
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_SETUP_DMA_OPS
select ARCH_HAS_SET_DIRECT_MAP
diff --git a/arch/arm64/include/asm/pgtable-prot.h b/arch/arm64/include/asm/pgtable-prot.h
index f318258a14be..92d2e9f28f28 100644
--- a/arch/arm64/include/asm/pgtable-prot.h
+++ b/arch/arm64/include/asm/pgtable-prot.h
@@ -16,6 +16,7 @@
#define PTE_WRITE (PTE_DBM) /* same as DBM (51) */
#define PTE_DIRTY (_AT(pteval_t, 1) << 55)
#define PTE_SPECIAL (_AT(pteval_t, 1) << 56)
+#define PTE_DEVMAP (_AT(pteval_t, 1) << 57)
#define PTE_PROT_NONE (_AT(pteval_t, 1) << 58) /* only when !PTE_VALID */
#ifndef __ASSEMBLY__
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 3052381baaeb..87a4b2ddc1a1 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -79,6 +79,7 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
#define pte_write(pte) (!!(pte_val(pte) & PTE_WRITE))
#define pte_user_exec(pte) (!(pte_val(pte) & PTE_UXN))
#define pte_cont(pte) (!!(pte_val(pte) & PTE_CONT))
+#define pte_devmap(pte) (!!(pte_val(pte) & PTE_DEVMAP))
#define pte_cont_addr_end(addr, end) \
({ unsigned long __boundary = ((addr) + CONT_PTE_SIZE) & CONT_PTE_MASK; \
@@ -206,6 +207,11 @@ static inline pmd_t pmd_mkcont(pmd_t pmd)
return __pmd(pmd_val(pmd) | PMD_SECT_CONT);
}
+static inline pte_t pte_mkdevmap(pte_t pte)
+{
+ return set_pte_bit(pte, __pgprot(PTE_DEVMAP));
+}
+
static inline void set_pte(pte_t *ptep, pte_t pte)
{
WRITE_ONCE(*ptep, pte);
@@ -388,6 +394,11 @@ static inline int pmd_protnone(pmd_t pmd)
#define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#define pmd_devmap(pmd) pte_devmap(pmd_pte(pmd))
+#endif
+#define pmd_mkdevmap(pmd) pte_pmd(pte_mkdevmap(pmd_pte(pmd)))
+
#define __pmd_to_phys(pmd) __pte_to_phys(pmd_pte(pmd))
#define __phys_to_pmd_val(phys) __phys_to_pte_val(phys)
#define pmd_pfn(pmd) ((__pmd_to_phys(pmd) & PMD_MASK) >> PAGE_SHIFT)
@@ -673,6 +684,16 @@ static inline int pmdp_set_access_flags(struct vm_area_struct *vma,
{
return ptep_set_access_flags(vma, address, (pte_t *)pmdp, pmd_pte(entry), dirty);
}
+
+static inline int pud_devmap(pud_t pud)
+{
+ return 0;
+}
+
+static inline int pgd_devmap(pgd_t pgd)
+{
+ return 0;
+}
#endif
/*
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index a7522fca1105..06ebcfef73df 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -9,7 +9,7 @@
#ifndef __ASM_SYSREG_H
#define __ASM_SYSREG_H
-#include <linux/const.h>
+#include <linux/bits.h>
#include <linux/stringify.h>
/*
@@ -478,31 +478,31 @@
#define SYS_CNTV_CVAL_EL02 sys_reg(3, 5, 14, 3, 2)
/* Common SCTLR_ELx flags. */
-#define SCTLR_ELx_DSSBS (_BITUL(44))
-#define SCTLR_ELx_ENIA (_BITUL(31))
-#define SCTLR_ELx_ENIB (_BITUL(30))
-#define SCTLR_ELx_ENDA (_BITUL(27))
-#define SCTLR_ELx_EE (_BITUL(25))
-#define SCTLR_ELx_IESB (_BITUL(21))
-#define SCTLR_ELx_WXN (_BITUL(19))
-#define SCTLR_ELx_ENDB (_BITUL(13))
-#define SCTLR_ELx_I (_BITUL(12))
-#define SCTLR_ELx_SA (_BITUL(3))
-#define SCTLR_ELx_C (_BITUL(2))
-#define SCTLR_ELx_A (_BITUL(1))
-#define SCTLR_ELx_M (_BITUL(0))
+#define SCTLR_ELx_DSSBS (BIT(44))
+#define SCTLR_ELx_ENIA (BIT(31))
+#define SCTLR_ELx_ENIB (BIT(30))
+#define SCTLR_ELx_ENDA (BIT(27))
+#define SCTLR_ELx_EE (BIT(25))
+#define SCTLR_ELx_IESB (BIT(21))
+#define SCTLR_ELx_WXN (BIT(19))
+#define SCTLR_ELx_ENDB (BIT(13))
+#define SCTLR_ELx_I (BIT(12))
+#define SCTLR_ELx_SA (BIT(3))
+#define SCTLR_ELx_C (BIT(2))
+#define SCTLR_ELx_A (BIT(1))
+#define SCTLR_ELx_M (BIT(0))
#define SCTLR_ELx_FLAGS (SCTLR_ELx_M | SCTLR_ELx_A | SCTLR_ELx_C | \
SCTLR_ELx_SA | SCTLR_ELx_I | SCTLR_ELx_IESB)
/* SCTLR_EL2 specific flags. */
-#define SCTLR_EL2_RES1 ((_BITUL(4)) | (_BITUL(5)) | (_BITUL(11)) | (_BITUL(16)) | \
- (_BITUL(18)) | (_BITUL(22)) | (_BITUL(23)) | (_BITUL(28)) | \
- (_BITUL(29)))
-#define SCTLR_EL2_RES0 ((_BITUL(6)) | (_BITUL(7)) | (_BITUL(8)) | (_BITUL(9)) | \
- (_BITUL(10)) | (_BITUL(13)) | (_BITUL(14)) | (_BITUL(15)) | \
- (_BITUL(17)) | (_BITUL(20)) | (_BITUL(24)) | (_BITUL(26)) | \
- (_BITUL(27)) | (_BITUL(30)) | (_BITUL(31)) | \
+#define SCTLR_EL2_RES1 ((BIT(4)) | (BIT(5)) | (BIT(11)) | (BIT(16)) | \
+ (BIT(18)) | (BIT(22)) | (BIT(23)) | (BIT(28)) | \
+ (BIT(29)))
+#define SCTLR_EL2_RES0 ((BIT(6)) | (BIT(7)) | (BIT(8)) | (BIT(9)) | \
+ (BIT(10)) | (BIT(13)) | (BIT(14)) | (BIT(15)) | \
+ (BIT(17)) | (BIT(20)) | (BIT(24)) | (BIT(26)) | \
+ (BIT(27)) | (BIT(30)) | (BIT(31)) | \
(0xffffefffUL << 32))
#ifdef CONFIG_CPU_BIG_ENDIAN
@@ -524,23 +524,23 @@
#endif
/* SCTLR_EL1 specific flags. */
-#define SCTLR_EL1_UCI (_BITUL(26))
-#define SCTLR_EL1_E0E (_BITUL(24))
-#define SCTLR_EL1_SPAN (_BITUL(23))
-#define SCTLR_EL1_NTWE (_BITUL(18))
-#define SCTLR_EL1_NTWI (_BITUL(16))
-#define SCTLR_EL1_UCT (_BITUL(15))
-#define SCTLR_EL1_DZE (_BITUL(14))
-#define SCTLR_EL1_UMA (_BITUL(9))
-#define SCTLR_EL1_SED (_BITUL(8))
-#define SCTLR_EL1_ITD (_BITUL(7))
-#define SCTLR_EL1_CP15BEN (_BITUL(5))
-#define SCTLR_EL1_SA0 (_BITUL(4))
-
-#define SCTLR_EL1_RES1 ((_BITUL(11)) | (_BITUL(20)) | (_BITUL(22)) | (_BITUL(28)) | \
- (_BITUL(29)))
-#define SCTLR_EL1_RES0 ((_BITUL(6)) | (_BITUL(10)) | (_BITUL(13)) | (_BITUL(17)) | \
- (_BITUL(27)) | (_BITUL(30)) | (_BITUL(31)) | \
+#define SCTLR_EL1_UCI (BIT(26))
+#define SCTLR_EL1_E0E (BIT(24))
+#define SCTLR_EL1_SPAN (BIT(23))
+#define SCTLR_EL1_NTWE (BIT(18))
+#define SCTLR_EL1_NTWI (BIT(16))
+#define SCTLR_EL1_UCT (BIT(15))
+#define SCTLR_EL1_DZE (BIT(14))
+#define SCTLR_EL1_UMA (BIT(9))
+#define SCTLR_EL1_SED (BIT(8))
+#define SCTLR_EL1_ITD (BIT(7))
+#define SCTLR_EL1_CP15BEN (BIT(5))
+#define SCTLR_EL1_SA0 (BIT(4))
+
+#define SCTLR_EL1_RES1 ((BIT(11)) | (BIT(20)) | (BIT(22)) | (BIT(28)) | \
+ (BIT(29)))
+#define SCTLR_EL1_RES0 ((BIT(6)) | (BIT(10)) | (BIT(13)) | (BIT(17)) | \
+ (BIT(27)) | (BIT(30)) | (BIT(31)) | \
(0xffffefffUL << 32))
#ifdef CONFIG_CPU_BIG_ENDIAN
@@ -756,13 +756,13 @@
#define ZCR_ELx_LEN_SIZE 9
#define ZCR_ELx_LEN_MASK 0x1ff
-#define CPACR_EL1_ZEN_EL1EN (_BITUL(16)) /* enable EL1 access */
-#define CPACR_EL1_ZEN_EL0EN (_BITUL(17)) /* enable EL0 access, if EL1EN set */
+#define CPACR_EL1_ZEN_EL1EN (BIT(16)) /* enable EL1 access */
+#define CPACR_EL1_ZEN_EL0EN (BIT(17)) /* enable EL0 access, if EL1EN set */
#define CPACR_EL1_ZEN (CPACR_EL1_ZEN_EL1EN | CPACR_EL1_ZEN_EL0EN)
/* Safe value for MPIDR_EL1: Bit31:RES1, Bit30:U:0, Bit24:MT:0 */
-#define SYS_MPIDR_SAFE_VAL (_BITUL(31))
+#define SYS_MPIDR_SAFE_VAL (BIT(31))
#ifdef __ASSEMBLY__
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index c8c61b1eb479..9568c116ac7f 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -59,28 +59,6 @@ static inline const struct fault_info *esr_to_debug_fault_info(unsigned int esr)
return debug_fault_info + DBG_ESR_EVT(esr);
}
-#ifdef CONFIG_KPROBES
-static inline int notify_page_fault(struct pt_regs *regs, unsigned int esr)
-{
- int ret = 0;
-
- /* kprobe_running() needs smp_processor_id() */
- if (!user_mode(regs)) {
- preempt_disable();
- if (kprobe_running() && kprobe_fault_handler(regs, esr))
- ret = 1;
- preempt_enable();
- }
-
- return ret;
-}
-#else
-static inline int notify_page_fault(struct pt_regs *regs, unsigned int esr)
-{
- return 0;
-}
-#endif
-
static void data_abort_decode(unsigned int esr)
{
pr_alert("Data abort info:\n");
@@ -434,7 +412,7 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr,
unsigned long vm_flags = VM_READ | VM_WRITE;
unsigned int mm_flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
- if (notify_page_fault(regs, esr))
+ if (kprobe_page_fault(regs, esr))
return 0;
/*
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 1b49c08dfa2b..e661469cabdd 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -942,6 +942,11 @@ void *__init fixmap_remap_fdt(phys_addr_t dt_phys)
return dt_virt;
}
+int __init arch_ioremap_p4d_supported(void)
+{
+ return 0;
+}
+
int __init arch_ioremap_pud_supported(void)
{
/*
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.