Merge branch 'devel-stable' into for-next

10 files changed, 84 insertions, 16 deletions

diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h
index b62eaeb..abaac5e 100644
--- a/arch/arm/include/asm/cputype.h
+++ b/arch/arm/include/asm/cputype.h
@@ -173,6 +173,11 @@ static inline unsigned int __attribute_const__ read_cpuid_cachetype(void)
 	return read_cpuid(CPUID_CACHETYPE);
 }
 
+static inline unsigned int __attribute_const__ read_cpuid_mputype(void)
+{
+	return read_cpuid(CPUID_MPUIR);
+}
+
 #elif defined(CONFIG_CPU_V7M)
 
 static inline unsigned int __attribute_const__ read_cpuid_id(void)
@@ -185,6 +190,11 @@ static inline unsigned int __attribute_const__ read_cpuid_cachetype(void)
 	return readl(BASEADDR_V7M_SCB + V7M_SCB_CTR);
 }
 
+static inline unsigned int __attribute_const__ read_cpuid_mputype(void)
+{
+	return readl(BASEADDR_V7M_SCB + MPU_TYPE);
+}
+
 #else /* ifdef CONFIG_CPU_CP15 / elif defined(CONFIG_CPU_V7M) */
 
 static inline unsigned int __attribute_const__ read_cpuid_id(void)
diff --git a/arch/arm/include/asm/elf.h b/arch/arm/include/asm/elf.h
index f13ae15..ad0ca4f 100644
--- a/arch/arm/include/asm/elf.h
+++ b/arch/arm/include/asm/elf.h
@@ -100,10 +100,15 @@ struct elf32_hdr;
 extern int elf_check_arch(const struct elf32_hdr *);
 #define elf_check_arch elf_check_arch
 
+#define ELFOSABI_ARM_FDPIC  65	/* ARM FDPIC platform */
+#define elf_check_fdpic(x)  ((x)->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC)
+#define elf_check_const_displacement(x)  ((x)->e_flags & EF_ARM_PIC)
+#define ELF_FDPIC_CORE_EFLAGS  0
+
 #define vmcore_elf64_check_arch(x) (0)
 
-extern int arm_elf_read_implies_exec(const struct elf32_hdr *, int);
-#define elf_read_implies_exec(ex,stk) arm_elf_read_implies_exec(&(ex), stk)
+extern int arm_elf_read_implies_exec(int);
+#define elf_read_implies_exec(ex,stk) arm_elf_read_implies_exec(stk)
 
 struct task_struct;
 int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs);
@@ -120,6 +125,13 @@ int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs);
    have no such handler.  */
 #define ELF_PLAT_INIT(_r, load_addr)	(_r)->ARM_r0 = 0
 
+#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \
+	do { \
+		(_r)->ARM_r7 = _exec_map_addr; \
+		(_r)->ARM_r8 = _interp_map_addr; \
+		(_r)->ARM_r9 = dynamic_addr; \
+	} while(0)
+
 extern void elf_set_personality(const struct elf32_hdr *);
 #define SET_PERSONALITY(ex)	elf_set_personality(&(ex))
 
diff --git a/arch/arm/include/asm/mmu.h b/arch/arm/include/asm/mmu.h
index a5b47421..bdec37c 100644
--- a/arch/arm/include/asm/mmu.h
+++ b/arch/arm/include/asm/mmu.h
@@ -14,6 +14,10 @@ typedef struct {
 #ifdef CONFIG_VDSO
 	unsigned long	vdso;
 #endif
+#ifdef CONFIG_BINFMT_ELF_FDPIC
+	unsigned long	exec_fdpic_loadmap;
+	unsigned long	interp_fdpic_loadmap;
+#endif
 } mm_context_t;
 
 #ifdef CONFIG_CPU_HAS_ASID
@@ -33,6 +37,10 @@ typedef struct {
  */
 typedef struct {
 	unsigned long	end_brk;
+#ifdef CONFIG_BINFMT_ELF_FDPIC
+	unsigned long	exec_fdpic_loadmap;
+	unsigned long	interp_fdpic_loadmap;
+#endif
 } mm_context_t;
 
 #endif
diff --git a/arch/arm/include/asm/mpu.h b/arch/arm/include/asm/mpu.h
index c3247cc..56ec026 100644
--- a/arch/arm/include/asm/mpu.h
+++ b/arch/arm/include/asm/mpu.h
@@ -1,8 +1,6 @@
 #ifndef __ARM_MPU_H
 #define __ARM_MPU_H
 
-#ifdef CONFIG_ARM_MPU
-
 /* MPUIR layout */
 #define MPUIR_nU		1
 #define MPUIR_DREGION		8
@@ -17,6 +15,11 @@
 /* MPU D/I Size Register fields */
 #define MPU_RSR_SZ		1
 #define MPU_RSR_EN		0
+#define MPU_RSR_SD		8
+
+/* Number of subregions (SD) */
+#define MPU_NR_SUBREGS		8
+#define MPU_MIN_SUBREG_SIZE	256
 
 /* The D/I RSR value for an enabled region spanning the whole of memory */
 #define MPU_RSR_ALL_MEM		63
@@ -38,6 +41,7 @@
 #endif
 
 /* Access permission bits of ACR (only define those that we use)*/
+#define MPU_AP_PL1RO_PL0NA	(0x5 << 8)
 #define MPU_AP_PL1RW_PL0RW	(0x3 << 8)
 #define MPU_AP_PL1RW_PL0R0	(0x2 << 8)
 #define MPU_AP_PL1RW_PL0NA	(0x1 << 8)
@@ -46,7 +50,7 @@
 #define MPU_PROBE_REGION	0
 #define MPU_BG_REGION		1
 #define MPU_RAM_REGION		2
-#define MPU_VECTORS_REGION	3
+#define MPU_ROM_REGION		3
 
 /* Maximum number of regions Linux is interested in */
 #define MPU_MAX_REGIONS		16
@@ -64,13 +68,23 @@ struct mpu_rgn {
 };
 
 struct mpu_rgn_info {
-	u32 mpuir;
+	unsigned int used;
 	struct mpu_rgn rgns[MPU_MAX_REGIONS];
 };
 extern struct mpu_rgn_info mpu_rgn_info;
 
-#endif /* __ASSEMBLY__ */
+#ifdef CONFIG_ARM_MPU
+
+extern void __init adjust_lowmem_bounds_mpu(void);
+extern void __init mpu_setup(void);
 
-#endif /* CONFIG_ARM_MPU */
+#else
+
+static inline void adjust_lowmem_bounds_mpu(void) {}
+static inline void mpu_setup(void) {}
+
+#endif /* !CONFIG_ARM_MPU */
+
+#endif /* __ASSEMBLY__ */
 
 #endif
diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h
index c3d5fc1..338cbe0 100644
--- a/arch/arm/include/asm/processor.h
+++ b/arch/arm/include/asm/processor.h
@@ -47,15 +47,24 @@ struct thread_struct {
 
 #define INIT_THREAD  {	}
 
-#ifdef CONFIG_MMU
-#define nommu_start_thread(regs) do { } while (0)
-#else
-#define nommu_start_thread(regs) regs->ARM_r10 = current->mm->start_data
-#endif
-
 #define start_thread(regs,pc,sp)					\
 ({									\
+	unsigned long r7, r8, r9;					\
+									\
+	if (IS_ENABLED(CONFIG_BINFMT_ELF_FDPIC)) {			\
+		r7 = regs->ARM_r7;					\
+		r8 = regs->ARM_r8;					\
+		r9 = regs->ARM_r9;					\
+	}								\
 	memset(regs->uregs, 0, sizeof(regs->uregs));			\
+	if (IS_ENABLED(CONFIG_BINFMT_ELF_FDPIC) &&			\
+	    current->personality & FDPIC_FUNCPTRS) {			\
+		regs->ARM_r7 = r7;					\
+		regs->ARM_r8 = r8;					\
+		regs->ARM_r9 = r9;					\
+		regs->ARM_r10 = current->mm->start_data;		\
+	} else if (!IS_ENABLED(CONFIG_MMU))				\
+		regs->ARM_r10 = current->mm->start_data;		\
 	if (current->personality & ADDR_LIMIT_32BIT)			\
 		regs->ARM_cpsr = USR_MODE;				\
 	else								\
@@ -65,7 +74,6 @@ struct thread_struct {
 	regs->ARM_cpsr |= PSR_ENDSTATE;					\
 	regs->ARM_pc = pc & ~1;		/* pc */			\
 	regs->ARM_sp = sp;		/* sp */			\
-	nommu_start_thread(regs);					\
 })
 
 /* Forward declaration, a strange C thing */
diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h
index 3d6dc8b..709a559 100644
--- a/arch/arm/include/asm/smp.h
+++ b/arch/arm/include/asm/smp.h
@@ -60,7 +60,7 @@ asmlinkage void secondary_start_kernel(void);
  */
 struct secondary_data {
 	union {
-		unsigned long mpu_rgn_szr;
+		struct mpu_rgn_info *mpu_rgn_info;
 		u64 pgdir;
 	};
 	unsigned long swapper_pg_dir;
diff --git a/arch/arm/include/asm/ucontext.h b/arch/arm/include/asm/ucontext.h
index 921d827..b42c75a 100644
--- a/arch/arm/include/asm/ucontext.h
+++ b/arch/arm/include/asm/ucontext.h
@@ -2,6 +2,7 @@
 #define _ASMARM_UCONTEXT_H
 
 #include <asm/fpstate.h>
+#include <asm/user.h>
 
 /*
  * struct sigcontext only has room for the basic registers, but struct
diff --git a/arch/arm/include/asm/v7m.h b/arch/arm/include/asm/v7m.h
index 1fd775c..5de776c 100644
--- a/arch/arm/include/asm/v7m.h
+++ b/arch/arm/include/asm/v7m.h
@@ -57,6 +57,16 @@
 #define	V7M_SCB_CCSIDR		0x80	/* Cache size ID register */
 #define	V7M_SCB_CSSELR		0x84	/* Cache size selection register */
 
+/* Memory-mapped MPU registers for M-class */
+#define MPU_TYPE		0x90
+#define MPU_CTRL		0x94
+#define MPU_CTRL_ENABLE		1
+#define MPU_CTRL_PRIVDEFENA	(1 << 2)
+
+#define MPU_RNR			0x98
+#define MPU_RBAR		0x9c
+#define MPU_RASR		0xa0
+
 /* Cache opeartions */
 #define	V7M_SCB_ICIALLU		0x250	/* I-cache invalidate all to PoU */
 #define	V7M_SCB_ICIMVAU		0x258	/* I-cache invalidate by MVA to PoU */
diff --git a/arch/arm/include/uapi/asm/ptrace.h b/arch/arm/include/uapi/asm/ptrace.h
index 5af0ed1..3173eb9 100644
--- a/arch/arm/include/uapi/asm/ptrace.h
+++ b/arch/arm/include/uapi/asm/ptrace.h
@@ -31,6 +31,10 @@
 #define PTRACE_SETVFPREGS	28
 #define PTRACE_GETHBPREGS	29
 #define PTRACE_SETHBPREGS	30
+#define PTRACE_GETFDPIC		31
+
+#define PTRACE_GETFDPIC_EXEC	0
+#define PTRACE_GETFDPIC_INTERP	1
 
 /*
  * PSR bits
diff --git a/arch/arm/include/uapi/asm/unistd.h b/arch/arm/include/uapi/asm/unistd.h
index 28bd456..575b25f 100644
--- a/arch/arm/include/uapi/asm/unistd.h
+++ b/arch/arm/include/uapi/asm/unistd.h
@@ -35,5 +35,6 @@
 #define __ARM_NR_usr26			(__ARM_NR_BASE+3)
 #define __ARM_NR_usr32			(__ARM_NR_BASE+4)
 #define __ARM_NR_set_tls		(__ARM_NR_BASE+5)
+#define __ARM_NR_get_tls		(__ARM_NR_BASE+6)
 
 #endif /* _UAPI__ASM_ARM_UNISTD_H */