Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:

 - nommu updates from Afzal Mohammed cleaning up the vectors support

 - allow DMA memory "mapping" for nommu Benjamin Gaignard

 - fixing a correctness issue with R_ARM_PREL31 relocations in the
   module linker

 - add strlen() prototype for the decompressor

 - support for DEBUG_VIRTUAL from Florian Fainelli

 - adjusting memory bounds after memory reservations have been
   registered

 - unipher cache handling updates from Masahiro Yamada

 - initrd and Thumb Kconfig cleanups

* 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (23 commits)
  ARM: mm: round the initrd reservation to page boundaries
  ARM: mm: clean up initrd initialisation
  ARM: mm: move initrd init code out of arm_memblock_init()
  ARM: 8655/1: improve NOMMU definition of pgprot_*()
  ARM: 8654/1: decompressor: add strlen prototype
  ARM: 8652/1: cache-uniphier: clean up active way setup code
  ARM: 8651/1: cache-uniphier: include <linux/errno.h> instead of <linux/types.h>
  ARM: 8650/1: module: handle negative R_ARM_PREL31 addends correctly
  ARM: 8649/2: nommu: remove Hivecs configuration is asm
  ARM: 8648/2: nommu: display vectors base
  ARM: 8647/2: nommu: dynamic exception base address setting
  ARM: 8646/1: mmu: decouple VECTORS_BASE from Kconfig
  ARM: 8644/1: Reduce "CPU: shutdown" message to debug level
  ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol
  ARM: 8640/1: Add support for CONFIG_DEBUG_VIRTUAL
  ARM: 8639/1: Define KERNEL_START and KERNEL_END
  ARM: 8638/1: mtd: lart: Rename partition defines to be prefixed with PART_
  ARM: 8637/1: Adjust memory boundaries after reservations
  ARM: 8636/1: Cleanup sanity_check_meminfo
  ARM: add CPU_THUMB_CAPABLE to indicate possible Thumb support
  ...

arch/arm/Kconfig

@@ -2,6 +2,7 @@ config ARM
 	bool
 	default y
 	select ARCH_CLOCKSOURCE_DATA
+	select ARCH_HAS_DEBUG_VIRTUAL
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
 	select ARCH_HAS_ELF_RANDOMIZE
 	select ARCH_HAS_SET_MEMORY

arch/arm/Kconfig-nommu

@@ -34,8 +34,7 @@ config PROCESSOR_ID
 	  used instead of the auto-probing which utilizes the register.
 
 config REMAP_VECTORS_TO_RAM
-	bool 'Install vectors to the beginning of RAM' if DRAM_BASE
-	depends on DRAM_BASE
+	bool 'Install vectors to the beginning of RAM'
 	help
 	  The kernel needs to change the hardware exception vectors.
 	  In nommu mode, the hardware exception vectors are normally

arch/arm/boot/compressed/decompress.c

@@ -32,6 +32,7 @@ extern void error(char *);
 
 /* Not needed, but used in some headers pulled in by decompressors */
 extern char * strstr(const char * s1, const char *s2);
+extern size_t strlen(const char *s);
 
 #ifdef CONFIG_KERNEL_GZIP
 #include "../../../../lib/decompress_inflate.c"

arch/arm/common/mcpm_entry.c

@@ -144,7 +144,7 @@ extern unsigned long mcpm_entry_vectors[MAX_NR_CLUSTERS][MAX_CPUS_PER_CLUSTER];
 
 void mcpm_set_entry_vector(unsigned cpu, unsigned cluster, void *ptr)
 {
-	unsigned long val = ptr ? virt_to_phys(ptr) : 0;
+	unsigned long val = ptr ? __pa_symbol(ptr) : 0;
 	mcpm_entry_vectors[cluster][cpu] = val;
 	sync_cache_w(&mcpm_entry_vectors[cluster][cpu]);
 }
@@ -299,8 +299,8 @@ void mcpm_cpu_power_down(void)
 	 * the kernel as if the power_up method just had deasserted reset
 	 * on the CPU.
 	 */
-	phys_reset = (phys_reset_t)(unsigned long)virt_to_phys(cpu_reset);
-	phys_reset(virt_to_phys(mcpm_entry_point));
+	phys_reset = (phys_reset_t)(unsigned long)__pa_symbol(cpu_reset);
+	phys_reset(__pa_symbol(mcpm_entry_point));
 
 	/* should never get here */
 	BUG();
@@ -388,8 +388,8 @@ static int __init nocache_trampoline(unsigned long _arg)
 	__mcpm_outbound_leave_critical(cluster, CLUSTER_DOWN);
 	__mcpm_cpu_down(cpu, cluster);
 
-	phys_reset = (phys_reset_t)(unsigned long)virt_to_phys(cpu_reset);
-	phys_reset(virt_to_phys(mcpm_entry_point));
+	phys_reset = (phys_reset_t)(unsigned long)__pa_symbol(cpu_reset);
+	phys_reset(__pa_symbol(mcpm_entry_point));
 	BUG();
 }
 
@@ -449,7 +449,7 @@ int __init mcpm_sync_init(
 	sync_cache_w(&mcpm_sync);
 
 	if (power_up_setup) {
-		mcpm_power_up_setup_phys = virt_to_phys(power_up_setup);
+		mcpm_power_up_setup_phys = __pa_symbol(power_up_setup);
 		sync_cache_w(&mcpm_power_up_setup_phys);
 	}
 

arch/arm/include/asm/hardware/cache-uniphier.h

@@ -16,7 +16,7 @@
 #ifndef __CACHE_UNIPHIER_H
 #define __CACHE_UNIPHIER_H
 
-#include <linux/types.h>
+#include <linux/errno.h>
 
 #ifdef CONFIG_CACHE_UNIPHIER
 int uniphier_cache_init(void);

arch/arm/include/asm/memory.h

@@ -83,8 +83,15 @@
 #define IOREMAP_MAX_ORDER	24
 #endif
 
+#define VECTORS_BASE		UL(0xffff0000)
+
 #else /* CONFIG_MMU */
 
+#ifndef __ASSEMBLY__
+extern unsigned long vectors_base;
+#define VECTORS_BASE		vectors_base
+#endif
+
 /*
  * The limitation of user task size can grow up to the end of free ram region.
  * It is difficult to define and perhaps will never meet the original meaning
@@ -111,6 +118,13 @@
 
 #endif /* !CONFIG_MMU */
 
+#ifdef CONFIG_XIP_KERNEL
+#define KERNEL_START		_sdata
+#else
+#define KERNEL_START		_stext
+#endif
+#define KERNEL_END		_end
+
 /*
  * We fix the TCM memories max 32 KiB ITCM resp DTCM at these
  * locations
@@ -206,7 +220,7 @@ extern const void *__pv_table_begin, *__pv_table_end;
 	: "r" (x), "I" (__PV_BITS_31_24)		\
 	: "cc")
 
-static inline phys_addr_t __virt_to_phys(unsigned long x)
+static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x)
 {
 	phys_addr_t t;
 
@@ -238,7 +252,7 @@ static inline unsigned long __phys_to_virt(phys_addr_t x)
 #define PHYS_OFFSET	PLAT_PHYS_OFFSET
 #define PHYS_PFN_OFFSET	((unsigned long)(PHYS_OFFSET >> PAGE_SHIFT))
 
-static inline phys_addr_t __virt_to_phys(unsigned long x)
+static inline phys_addr_t __virt_to_phys_nodebug(unsigned long x)
 {
 	return (phys_addr_t)x - PAGE_OFFSET + PHYS_OFFSET;
 }
@@ -254,6 +268,16 @@ static inline unsigned long __phys_to_virt(phys_addr_t x)
 	((((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT) + \
 	 PHYS_PFN_OFFSET)
 
+#define __pa_symbol_nodebug(x)	__virt_to_phys_nodebug((x))
+
+#ifdef CONFIG_DEBUG_VIRTUAL
+extern phys_addr_t __virt_to_phys(unsigned long x);
+extern phys_addr_t __phys_addr_symbol(unsigned long x);
+#else
+#define __virt_to_phys(x)	__virt_to_phys_nodebug(x)
+#define __phys_addr_symbol(x)	__pa_symbol_nodebug(x)
+#endif
+
 /*
  * These are *only* valid on the kernel direct mapped RAM memory.
  * Note: Drivers should NOT use these.  They are the wrong
@@ -276,6 +300,7 @@ static inline void *phys_to_virt(phys_addr_t x)
  * Drivers should NOT use these either.
  */
 #define __pa(x)			__virt_to_phys((unsigned long)(x))
+#define __pa_symbol(x)		__phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
 #define __va(x)			((void *)__phys_to_virt((phys_addr_t)(x)))
 #define pfn_to_kaddr(pfn)	__va((phys_addr_t)(pfn) << PAGE_SHIFT)
 

arch/arm/include/asm/pgtable-nommu.h

@@ -63,9 +63,9 @@ typedef pte_t *pte_addr_t;
 /*
  * Mark the prot value as uncacheable and unbufferable.
  */
-#define pgprot_noncached(prot)	__pgprot(0)
-#define pgprot_writecombine(prot) __pgprot(0)
-#define pgprot_dmacoherent(prot) __pgprot(0)
+#define pgprot_noncached(prot)	(prot)
+#define pgprot_writecombine(prot) (prot)
+#define pgprot_dmacoherent(prot) (prot)
 
 
 /*

arch/arm/kernel/head-nommu.S

@@ -151,11 +151,6 @@ __after_proc_init:
 #endif
 #ifdef CONFIG_CPU_ICACHE_DISABLE
 	bic	r0, r0, #CR_I
-#endif
-#ifdef CONFIG_CPU_HIGH_VECTOR
-	orr	r0, r0, #CR_V
-#else
-	bic	r0, r0, #CR_V
 #endif
 	mcr	p15, 0, r0, c1, c0, 0		@ write control reg
 #elif defined (CONFIG_CPU_V7M)

arch/arm/kernel/module.c

@@ -155,8 +155,17 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
 		       break;
 
 		case R_ARM_PREL31:
-			offset = *(u32 *)loc + sym->st_value - loc;
-			*(u32 *)loc = offset & 0x7fffffff;
+			offset = (*(s32 *)loc << 1) >> 1; /* sign extend */
+			offset += sym->st_value - loc;
+			if (offset >= 0x40000000 || offset < -0x40000000) {
+				pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n",
+				       module->name, relindex, i, symname,
+				       ELF32_R_TYPE(rel->r_info), loc,
+				       sym->st_value);
+				return -ENOEXEC;
+			}
+			*(u32 *)loc &= 0x80000000;
+			*(u32 *)loc |= offset & 0x7fffffff;
 			break;
 
 		case R_ARM_MOVW_ABS_NC:

arch/arm/kernel/setup.c

@@ -81,7 +81,7 @@ __setup("fpe=", fpe_setup);
 extern void init_default_cache_policy(unsigned long);
 extern void paging_init(const struct machine_desc *desc);
 extern void early_paging_init(const struct machine_desc *);
-extern void sanity_check_meminfo(void);
+extern void adjust_lowmem_bounds(void);
 extern enum reboot_mode reboot_mode;
 extern void setup_dma_zone(const struct machine_desc *desc);
 
@@ -1093,8 +1093,14 @@ void __init setup_arch(char **cmdline_p)
 	setup_dma_zone(mdesc);
 	xen_early_init();
 	efi_init();
-	sanity_check_meminfo();
+	/*
+	 * Make sure the calculation for lowmem/highmem is set appropriately
+	 * before reserving/allocating any mmeory
+	 */
+	adjust_lowmem_bounds();
 	arm_memblock_init(mdesc);
+	/* Memory may have been removed so recalculate the bounds. */
+	adjust_lowmem_bounds();
 
 	early_ioremap_reset();
 

arch/arm/kernel/smp.c

@@ -251,7 +251,7 @@ void __cpu_die(unsigned int cpu)
 		pr_err("CPU%u: cpu didn't die\n", cpu);
 		return;
 	}
-	pr_notice("CPU%u: shutdown\n", cpu);
+	pr_debug("CPU%u: shutdown\n", cpu);
 
 	/*
 	 * platform_cpu_kill() is generally expected to do the powering off

arch/arm/mach-alpine/platsmp.c

@@ -27,7 +27,7 @@ static int alpine_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
 	phys_addr_t addr;
 
-	addr = virt_to_phys(secondary_startup);
+	addr = __pa_symbol(secondary_startup);
 
 	if (addr > (phys_addr_t)(uint32_t)(-1)) {
 		pr_err("FAIL: resume address over 32bit (%pa)", &addr);

arch/arm/mach-axxia/platsmp.c

@@ -25,7 +25,7 @@
 static void write_release_addr(u32 release_phys)
 {
 	u32 *virt = (u32 *) phys_to_virt(release_phys);
-	writel_relaxed(virt_to_phys(secondary_startup), virt);
+	writel_relaxed(__pa_symbol(secondary_startup), virt);
 	/* Make sure this store is visible to other CPUs */
 	smp_wmb();
 	__cpuc_flush_dcache_area(virt, sizeof(u32));

arch/arm/mach-bcm/bcm63xx_smp.c

@@ -135,7 +135,7 @@ static int bcm63138_smp_boot_secondary(unsigned int cpu,
 	}
 
 	/* Write the secondary init routine to the BootLUT reset vector */
-	val = virt_to_phys(secondary_startup);
+	val = __pa_symbol(secondary_startup);
 	writel_relaxed(val, bootlut_base + BOOTLUT_RESET_VECT);
 
 	/* Power up the core, will jump straight to its reset vector when we

arch/arm/mach-bcm/platsmp-brcmstb.c

@@ -151,7 +151,7 @@ static void brcmstb_cpu_boot(u32 cpu)
 	 * Set the reset vector to point to the secondary_startup
 	 * routine
 	 */
-	cpu_set_boot_addr(cpu, virt_to_phys(secondary_startup));
+	cpu_set_boot_addr(cpu, __pa_symbol(secondary_startup));
 
 	/* Unhalt the cpu */
 	cpu_rst_cfg_set(cpu, 0);

arch/arm/mach-bcm/platsmp.c

@@ -116,7 +116,7 @@ static int nsp_write_lut(unsigned int cpu)
 		return -ENOMEM;
 	}
 
-	secondary_startup_phy = virt_to_phys(secondary_startup);
+	secondary_startup_phy = __pa_symbol(secondary_startup);
 	BUG_ON(secondary_startup_phy > (phys_addr_t)U32_MAX);
 
 	writel_relaxed(secondary_startup_phy, sku_rom_lut);
@@ -189,7 +189,7 @@ static int kona_boot_secondary(unsigned int cpu, struct task_struct *idle)
 	 * Secondary cores will start in secondary_startup(),
 	 * defined in "arch/arm/kernel/head.S"
 	 */
-	boot_func = virt_to_phys(secondary_startup);
+	boot_func = __pa_symbol(secondary_startup);
 	BUG_ON(boot_func & BOOT_ADDR_CPUID_MASK);
 	BUG_ON(boot_func > (phys_addr_t)U32_MAX);
 

arch/arm/mach-berlin/platsmp.c

@@ -15,6 +15,7 @@
 
 #include <asm/cacheflush.h>
 #include <asm/cp15.h>
+#include <asm/memory.h>
 #include <asm/smp_plat.h>
 #include <asm/smp_scu.h>
 
@@ -75,7 +76,7 @@ static void __init berlin_smp_prepare_cpus(unsigned int max_cpus)
 	if (!cpu_ctrl)
 		goto unmap_scu;
 
-	vectors_base = ioremap(CONFIG_VECTORS_BASE, SZ_32K);
+	vectors_base = ioremap(VECTORS_BASE, SZ_32K);
 	if (!vectors_base)
 		goto unmap_scu;
 
@@ -92,7 +93,7 @@ static void __init berlin_smp_prepare_cpus(unsigned int max_cpus)
 	 * Write the secondary startup address into the SW reset address
 	 * vector. This is used by boot_inst.
 	 */
-	writel(virt_to_phys(secondary_startup), vectors_base + SW_RESET_ADDR);
+	writel(__pa_symbol(secondary_startup), vectors_base + SW_RESET_ADDR);
 
 	iounmap(vectors_base);
 unmap_scu:

arch/arm/mach-exynos/firmware.c

@@ -41,7 +41,7 @@ static int exynos_do_idle(unsigned long mode)
 	case FW_DO_IDLE_AFTR:
 		if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9)
 			exynos_save_cp15();
-		writel_relaxed(virt_to_phys(exynos_cpu_resume_ns),
+		writel_relaxed(__pa_symbol(exynos_cpu_resume_ns),
 			       sysram_ns_base_addr + 0x24);
 		writel_relaxed(EXYNOS_AFTR_MAGIC, sysram_ns_base_addr + 0x20);
 		if (soc_is_exynos3250()) {
@@ -135,7 +135,7 @@ static int exynos_suspend(void)
 		exynos_save_cp15();
 
 	writel(EXYNOS_SLEEP_MAGIC, sysram_ns_base_addr + EXYNOS_BOOT_FLAG);
-	writel(virt_to_phys(exynos_cpu_resume_ns),
+	writel(__pa_symbol(exynos_cpu_resume_ns),
 		sysram_ns_base_addr + EXYNOS_BOOT_ADDR);
 
 	return cpu_suspend(0, exynos_cpu_suspend);

arch/arm/mach-exynos/mcpm-exynos.c

@@ -221,7 +221,7 @@ static void exynos_mcpm_setup_entry_point(void)
 	 */
 	__raw_writel(0xe59f0000, ns_sram_base_addr);     /* ldr r0, [pc, #0] */
 	__raw_writel(0xe12fff10, ns_sram_base_addr + 4); /* bx  r0 */
-	__raw_writel(virt_to_phys(mcpm_entry_point), ns_sram_base_addr + 8);
+	__raw_writel(__pa_symbol(mcpm_entry_point), ns_sram_base_addr + 8);
 }
 
 static struct syscore_ops exynos_mcpm_syscore_ops = {

arch/arm/mach-exynos/platsmp.c

@@ -353,7 +353,7 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
 
 		smp_rmb();
 
-		boot_addr = virt_to_phys(exynos4_secondary_startup);
+		boot_addr = __pa_symbol(exynos4_secondary_startup);
 
 		ret = exynos_set_boot_addr(core_id, boot_addr);
 		if (ret)
@@ -413,7 +413,7 @@ static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
 
 		mpidr = cpu_logical_map(i);
 		core_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
-		boot_addr = virt_to_phys(exynos4_secondary_startup);
+		boot_addr = __pa_symbol(exynos4_secondary_startup);
 
 		ret = exynos_set_boot_addr(core_id, boot_addr);
 		if (ret)

arch/arm/mach-exynos/pm.c

@@ -132,7 +132,7 @@ static void exynos_set_wakeupmask(long mask)
 
 static void exynos_cpu_set_boot_vector(long flags)
 {
-	writel_relaxed(virt_to_phys(exynos_cpu_resume),
+	writel_relaxed(__pa_symbol(exynos_cpu_resume),
 		       exynos_boot_vector_addr());
 	writel_relaxed(flags, exynos_boot_vector_flag());
 }
@@ -238,7 +238,7 @@ static int exynos_cpu0_enter_aftr(void)
 
 abort:
 	if (cpu_online(1)) {
-		unsigned long boot_addr = virt_to_phys(exynos_cpu_resume);
+		unsigned long boot_addr = __pa_symbol(exynos_cpu_resume);
 
 		/*
 		 * Set the boot vector to something non-zero
@@ -330,7 +330,7 @@ static int exynos_cpu1_powerdown(void)
 
 static void exynos_pre_enter_aftr(void)
 {
-	unsigned long boot_addr = virt_to_phys(exynos_cpu_resume);
+	unsigned long boot_addr = __pa_symbol(exynos_cpu_resume);
 
 	(void)exynos_set_boot_addr(1, boot_addr);
 }

arch/arm/mach-exynos/suspend.c

@@ -301,7 +301,7 @@ static void exynos_pm_prepare(void)
 	exynos_pm_enter_sleep_mode();
 
 	/* ensure at least INFORM0 has the resume address */
-	pmu_raw_writel(virt_to_phys(exynos_cpu_resume), S5P_INFORM0);
+	pmu_raw_writel(__pa_symbol(exynos_cpu_resume), S5P_INFORM0);
 }
 
 static void exynos3250_pm_prepare(void)
@@ -318,7 +318,7 @@ static void exynos3250_pm_prepare(void)
 	exynos_pm_enter_sleep_mode();
 
 	/* ensure at least INFORM0 has the resume address */
-	pmu_raw_writel(virt_to_phys(exynos_cpu_resume), S5P_INFORM0);
+	pmu_raw_writel(__pa_symbol(exynos_cpu_resume), S5P_INFORM0);
 }
 
 static void exynos5420_pm_prepare(void)
@@ -343,7 +343,7 @@ static void exynos5420_pm_prepare(void)
 
 	/* ensure at least INFORM0 has the resume address */
 	if (IS_ENABLED(CONFIG_EXYNOS5420_MCPM))
-		pmu_raw_writel(virt_to_phys(mcpm_entry_point), S5P_INFORM0);
+		pmu_raw_writel(__pa_symbol(mcpm_entry_point), S5P_INFORM0);
 
 	tmp = pmu_raw_readl(EXYNOS_L2_OPTION(0));
 	tmp &= ~EXYNOS_L2_USE_RETENTION;

arch/arm/mach-hisi/platmcpm.c

@@ -327,7 +327,7 @@ static int __init hip04_smp_init(void)
 	 */
 	writel_relaxed(hip04_boot_method[0], relocation);
 	writel_relaxed(0xa5a5a5a5, relocation + 4);	/* magic number */
-	writel_relaxed(virt_to_phys(secondary_startup), relocation + 8);
+	writel_relaxed(__pa_symbol(secondary_startup), relocation + 8);
 	writel_relaxed(0, relocation + 12);
 	iounmap(relocation);
 

arch/arm/mach-hisi/platsmp.c

@@ -28,7 +28,7 @@ void hi3xxx_set_cpu_jump(int cpu, void *jump_addr)
 	cpu = cpu_logical_map(cpu);
 	if (!cpu || !ctrl_base)
 		return;
-	writel_relaxed(virt_to_phys(jump_addr), ctrl_base + ((cpu - 1) << 2));
+	writel_relaxed(__pa_symbol(jump_addr), ctrl_base + ((cpu - 1) << 2));
 }
 
 int hi3xxx_get_cpu_jump(int cpu)
@@ -118,7 +118,7 @@ static int hix5hd2_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
 	phys_addr_t jumpaddr;
 
-	jumpaddr = virt_to_phys(secondary_startup);
+	jumpaddr = __pa_symbol(secondary_startup);
 	hix5hd2_set_scu_boot_addr(HIX5HD2_BOOT_ADDRESS, jumpaddr);
 	hix5hd2_set_cpu(cpu, true);
 	arch_send_wakeup_ipi_mask(cpumask_of(cpu));
@@ -156,7 +156,7 @@ static int hip01_boot_secondary(unsigned int cpu, struct task_struct *idle)
 	struct device_node *node;
 
 
-	jumpaddr = virt_to_phys(secondary_startup);
+	jumpaddr = __pa_symbol(secondary_startup);
 	hip01_set_boot_addr(HIP01_BOOT_ADDRESS, jumpaddr);
 
 	node = of_find_compatible_node(NULL, NULL, "hisilicon,hip01-sysctrl");

arch/arm/mach-imx/platsmp.c

@@ -117,7 +117,7 @@ static void __init ls1021a_smp_prepare_cpus(unsigned int max_cpus)
 	dcfg_base = of_iomap(np, 0);
 	BUG_ON(!dcfg_base);
 
-	paddr = virt_to_phys(secondary_startup);
+	paddr = __pa_symbol(secondary_startup);
 	writel_relaxed(cpu_to_be32(paddr), dcfg_base + DCFG_CCSR_SCRATCHRW1);
 
 	iounmap(dcfg_base);

arch/arm/mach-imx/pm-imx6.c

@@ -499,7 +499,7 @@ static int __init imx6q_suspend_init(const struct imx6_pm_socdata *socdata)
 	memset(suspend_ocram_base, 0, sizeof(*pm_info));
 	pm_info = suspend_ocram_base;
 	pm_info->pbase = ocram_pbase;
-	pm_info->resume_addr = virt_to_phys(v7_cpu_resume);
+	pm_info->resume_addr = __pa_symbol(v7_cpu_resume);
 	pm_info->pm_info_size = sizeof(*pm_info);
 
 	/*

arch/arm/mach-imx/src.c

@@ -99,7 +99,7 @@ void imx_enable_cpu(int cpu, bool enable)
 void imx_set_cpu_jump(int cpu, void *jump_addr)
 {
 	cpu = cpu_logical_map(cpu);
-	writel_relaxed(virt_to_phys(jump_addr),
+	writel_relaxed(__pa_symbol(jump_addr),
 		       src_base + SRC_GPR1 + cpu * 8);
 }
 

arch/arm/mach-mediatek/platsmp.c

@@ -122,7 +122,7 @@ static void __init __mtk_smp_prepare_cpus(unsigned int max_cpus, int trustzone)
 	 * write the address of slave startup address into the system-wide
 	 * jump register
 	 */
-	writel_relaxed(virt_to_phys(secondary_startup_arm),
+	writel_relaxed(__pa_symbol(secondary_startup_arm),
 			mtk_smp_base + mtk_smp_info->jump_reg);
 }
 

arch/arm/mach-mvebu/pm.c

@@ -110,7 +110,7 @@ static void mvebu_pm_store_armadaxp_bootinfo(u32 *store_addr)
 {
 	phys_addr_t resume_pc;
 
-	resume_pc = virt_to_phys(armada_370_xp_cpu_resume);
+	resume_pc = __pa_symbol(armada_370_xp_cpu_resume);
 
 	/*
 	 * The bootloader expects the first two words to be a magic

arch/arm/mach-mvebu/pmsu.c

@@ -112,7 +112,7 @@ static const struct of_device_id of_pmsu_table[] = {
 
 void mvebu_pmsu_set_cpu_boot_addr(int hw_cpu, void *boot_addr)
 {
-	writel(virt_to_phys(boot_addr), pmsu_mp_base +
+	writel(__pa_symbol(boot_addr), pmsu_mp_base +
 		PMSU_BOOT_ADDR_REDIRECT_OFFSET(hw_cpu));
 }
 

arch/arm/mach-mvebu/system-controller.c

@@ -153,7 +153,7 @@ void mvebu_system_controller_set_cpu_boot_addr(void *boot_addr)
 	if (of_machine_is_compatible("marvell,armada375"))
 		mvebu_armada375_smp_wa_init();
 
-	writel(virt_to_phys(boot_addr), system_controller_base +
+	writel(__pa_symbol(boot_addr), system_controller_base +
 	       mvebu_sc->resume_boot_addr);
 }
 #endif

arch/arm/mach-omap2/control.c

@@ -315,15 +315,15 @@ void omap3_save_scratchpad_contents(void)
 	scratchpad_contents.boot_config_ptr = 0x0;
 	if (cpu_is_omap3630())
 		scratchpad_contents.public_restore_ptr =
-			virt_to_phys(omap3_restore_3630);
+			__pa_symbol(omap3_restore_3630);
 	else if (omap_rev() != OMAP3430_REV_ES3_0 &&
 					omap_rev() != OMAP3430_REV_ES3_1 &&
 					omap_rev() != OMAP3430_REV_ES3_1_2)
 		scratchpad_contents.public_restore_ptr =
-			virt_to_phys(omap3_restore);
+			__pa_symbol(omap3_restore);
 	else
 		scratchpad_contents.public_restore_ptr =
-			virt_to_phys(omap3_restore_es3);
+			__pa_symbol(omap3_restore_es3);
 
 	if (omap_type() == OMAP2_DEVICE_TYPE_GP)
 		scratchpad_contents.secure_ram_restore_ptr = 0x0;
@@ -395,7 +395,7 @@ void omap3_save_scratchpad_contents(void)
 	sdrc_block_contents.flags = 0x0;
 	sdrc_block_contents.block_size = 0x0;
 
-	arm_context_addr = virt_to_phys(omap3_arm_context);
+	arm_context_addr = __pa_symbol(omap3_arm_context);
 
 	/* Copy all the contents to the scratchpad location */
 	scratchpad_address = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD);

arch/arm/mach-omap2/omap-mpuss-lowpower.c

@@ -273,7 +273,7 @@ int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state)
 	cpu_clear_prev_logic_pwrst(cpu);
 	pwrdm_set_next_pwrst(pm_info->pwrdm, power_state);
 	pwrdm_set_logic_retst(pm_info->pwrdm, cpu_logic_state);
-	set_cpu_wakeup_addr(cpu, virt_to_phys(omap_pm_ops.resume));
+	set_cpu_wakeup_addr(cpu, __pa_symbol(omap_pm_ops.resume));
 	omap_pm_ops.scu_prepare(cpu, power_state);
 	l2x0_pwrst_prepare(cpu, save_state);
 
@@ -325,7 +325,7 @@ int omap4_hotplug_cpu(unsigned int cpu, unsigned int power_state)
 
 	pwrdm_clear_all_prev_pwrst(pm_info->pwrdm);
 	pwrdm_set_next_pwrst(pm_info->pwrdm, power_state);
-	set_cpu_wakeup_addr(cpu, virt_to_phys(omap_pm_ops.hotplug_restart));
+	set_cpu_wakeup_addr(cpu, __pa_symbol(omap_pm_ops.hotplug_restart));
 	omap_pm_ops.scu_prepare(cpu, power_state);
 
 	/*
@@ -467,13 +467,13 @@ void __init omap4_mpuss_early_init(void)
 	sar_base = omap4_get_sar_ram_base();
 
 	if (cpu_is_omap443x())
-		startup_pa = virt_to_phys(omap4_secondary_startup);
+		startup_pa = __pa_symbol(omap4_secondary_startup);
 	else if (cpu_is_omap446x())
-		startup_pa = virt_to_phys(omap4460_secondary_startup);
+		startup_pa = __pa_symbol(omap4460_secondary_startup);
 	else if ((__boot_cpu_mode & MODE_MASK) == HYP_MODE)
-		startup_pa = virt_to_phys(omap5_secondary_hyp_startup);
+		startup_pa = __pa_symbol(omap5_secondary_hyp_startup);
 	else
-		startup_pa = virt_to_phys(omap5_secondary_startup);
+		startup_pa = __pa_symbol(omap5_secondary_startup);
 
 	if (cpu_is_omap44xx())
 		writel_relaxed(startup_pa, sar_base +

arch/arm/mach-omap2/omap-smp.c

@@ -316,9 +316,9 @@ static void __init omap4_smp_prepare_cpus(unsigned int max_cpus)
 	 * A barrier is added to ensure that write buffer is drained
 	 */
 	if (omap_secure_apis_support())
-		omap_auxcoreboot_addr(virt_to_phys(cfg.startup_addr));
+		omap_auxcoreboot_addr(__pa_symbol(cfg.startup_addr));
 	else
-		writel_relaxed(virt_to_phys(cfg.startup_addr),
+		writel_relaxed(__pa_symbol(cfg.startup_addr),
 			       base + OMAP_AUX_CORE_BOOT_1);
 }
 

arch/arm/mach-prima2/platsmp.c

@@ -65,7 +65,7 @@ static int sirfsoc_boot_secondary(unsigned int cpu, struct task_struct *idle)
 	 * waiting for. This would wake up the secondary core from WFE
 	 */
 #define SIRFSOC_CPU1_JUMPADDR_OFFSET 0x2bc
-	__raw_writel(virt_to_phys(sirfsoc_secondary_startup),
+	__raw_writel(__pa_symbol(sirfsoc_secondary_startup),
 		clk_base + SIRFSOC_CPU1_JUMPADDR_OFFSET);
 
 #define SIRFSOC_CPU1_WAKEMAGIC_OFFSET 0x2b8

arch/arm/mach-prima2/pm.c

@@ -54,7 +54,7 @@ static void sirfsoc_set_sleep_mode(u32 mode)
 
 static int sirfsoc_pre_suspend_power_off(void)
 {
-	u32 wakeup_entry = virt_to_phys(cpu_resume);
+	u32 wakeup_entry = __pa_symbol(cpu_resume);
 
 	sirfsoc_rtc_iobrg_writel(wakeup_entry, sirfsoc_pwrc_base +
 		SIRFSOC_PWRC_SCRATCH_PAD1);

arch/arm/mach-pxa/palmz72.c

@@ -249,7 +249,7 @@ static int palmz72_pm_suspend(void)
 	store_ptr = *PALMZ72_SAVE_DWORD;
 
 	/* Setting PSPR to a proper value */
-	PSPR = virt_to_phys(&palmz72_resume_info);
+	PSPR = __pa_symbol(&palmz72_resume_info);
 
 	return 0;
 }

arch/arm/mach-pxa/pxa25x.c

@@ -85,7 +85,7 @@ static void pxa25x_cpu_pm_enter(suspend_state_t state)
 static int pxa25x_cpu_pm_prepare(void)
 {
 	/* set resume return address */
-	PSPR = virt_to_phys(cpu_resume);
+	PSPR = __pa_symbol(cpu_resume);
 	return 0;
 }
 

arch/arm/mach-pxa/pxa27x.c

@@ -168,7 +168,7 @@ static int pxa27x_cpu_pm_valid(suspend_state_t state)
 static int pxa27x_cpu_pm_prepare(void)
 {
 	/* set resume return address */
-	PSPR = virt_to_phys(cpu_resume);
+	PSPR = __pa_symbol(cpu_resume);
 	return 0;
 }
 

arch/arm/mach-pxa/pxa3xx.c

@@ -123,7 +123,7 @@ static void pxa3xx_cpu_pm_suspend(void)
 	PSPR = 0x5c014000;
 
 	/* overwrite with the resume address */
-	*p = virt_to_phys(cpu_resume);
+	*p = __pa_symbol(cpu_resume);
 
 	cpu_suspend(0, pxa3xx_finish_suspend);
 

arch/arm/mach-realview/platsmp-dt.c

@@ -76,7 +76,7 @@ static void __init realview_smp_prepare_cpus(unsigned int max_cpus)
 	}
 	/* Put the boot address in this magic register */
 	regmap_write(map, REALVIEW_SYS_FLAGSSET_OFFSET,
-		     virt_to_phys(versatile_secondary_startup));
+		     __pa_symbol(versatile_secondary_startup));
 }
 
 static const struct smp_operations realview_dt_smp_ops __initconst = {

arch/arm/mach-rockchip/platsmp.c

@@ -156,7 +156,7 @@ static int rockchip_boot_secondary(unsigned int cpu, struct task_struct *idle)
 		 */
 		mdelay(1); /* ensure the cpus other than cpu0 to startup */
 
-		writel(virt_to_phys(secondary_startup), sram_base_addr + 8);
+		writel(__pa_symbol(secondary_startup), sram_base_addr + 8);
 		writel(0xDEADBEAF, sram_base_addr + 4);
 		dsb_sev();
 	}
@@ -195,7 +195,7 @@ static int __init rockchip_smp_prepare_sram(struct device_node *node)
 	}
 
 	/* set the boot function for the sram code */
-	rockchip_boot_fn = virt_to_phys(secondary_startup);
+	rockchip_boot_fn = __pa_symbol(secondary_startup);
 
 	/* copy the trampoline to sram, that runs during startup of the core */
 	memcpy(sram_base_addr, &rockchip_secondary_trampoline, trampoline_sz);

arch/arm/mach-rockchip/pm.c

@@ -62,7 +62,7 @@ static inline u32 rk3288_l2_config(void)
 static void rk3288_config_bootdata(void)
 {
 	rkpm_bootdata_cpusp = rk3288_bootram_phy + (SZ_4K - 8);
-	rkpm_bootdata_cpu_code = virt_to_phys(cpu_resume);
+	rkpm_bootdata_cpu_code = __pa_symbol(cpu_resume);
 
 	rkpm_bootdata_l2ctlr_f  = 1;
 	rkpm_bootdata_l2ctlr = rk3288_l2_config();

arch/arm/mach-s3c24xx/mach-jive.c

@@ -484,7 +484,7 @@ static int jive_pm_suspend(void)
 	 * correct address to resume from. */
 
 	__raw_writel(0x2BED, S3C2412_INFORM0);
-	__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1);
+	__raw_writel(__pa_symbol(s3c_cpu_resume), S3C2412_INFORM1);
 
 	return 0;
 }

arch/arm/mach-s3c24xx/pm-s3c2410.c

@@ -45,7 +45,7 @@ static void s3c2410_pm_prepare(void)
 {
 	/* ensure at least GSTATUS3 has the resume address */
 
-	__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2410_GSTATUS3);
+	__raw_writel(__pa_symbol(s3c_cpu_resume), S3C2410_GSTATUS3);
 
 	S3C_PMDBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
 	S3C_PMDBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));

arch/arm/mach-s3c24xx/pm-s3c2416.c

@@ -48,7 +48,7 @@ static void s3c2416_pm_prepare(void)
 	 * correct address to resume from.
 	 */
 	__raw_writel(0x2BED, S3C2412_INFORM0);
-	__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1);
+	__raw_writel(__pa_symbol(s3c_cpu_resume), S3C2412_INFORM1);
 }
 
 static int s3c2416_pm_add(struct device *dev, struct subsys_interface *sif)

arch/arm/mach-s3c64xx/pm.c

@@ -304,7 +304,7 @@ static void s3c64xx_pm_prepare(void)
 			      wake_irqs, ARRAY_SIZE(wake_irqs));
 
 	/* store address of resume. */
-	__raw_writel(virt_to_phys(s3c_cpu_resume), S3C64XX_INFORM0);
+	__raw_writel(__pa_symbol(s3c_cpu_resume), S3C64XX_INFORM0);
 
 	/* ensure previous wakeup state is cleared before sleeping */
 	__raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT), S3C64XX_WAKEUP_STAT);

arch/arm/mach-s5pv210/pm.c

@@ -69,7 +69,7 @@ static void s5pv210_pm_prepare(void)
 	__raw_writel(s5pv210_irqwake_intmask, S5P_WAKEUP_MASK);
 
 	/* ensure at least INFORM0 has the resume address */
-	__raw_writel(virt_to_phys(s5pv210_cpu_resume), S5P_INFORM0);
+	__raw_writel(__pa_symbol(s5pv210_cpu_resume), S5P_INFORM0);
 
 	tmp = __raw_readl(S5P_SLEEP_CFG);
 	tmp &= ~(S5P_SLEEP_CFG_OSC_EN | S5P_SLEEP_CFG_USBOSC_EN);

arch/arm/mach-sa1100/pm.c

@@ -73,7 +73,7 @@ static int sa11x0_pm_enter(suspend_state_t state)
 	RCSR = RCSR_HWR | RCSR_SWR | RCSR_WDR | RCSR_SMR;
 
 	/* set resume return address */
-	PSPR = virt_to_phys(cpu_resume);
+	PSPR = __pa_symbol(cpu_resume);
 
 	/* go zzz */
 	cpu_suspend(0, sa1100_finish_suspend);

arch/arm/mach-shmobile/platsmp-apmu.c

@@ -190,7 +190,7 @@ static void apmu_parse_dt(void (*fn)(struct resource *res, int cpu, int bit))
 static void __init shmobile_smp_apmu_setup_boot(void)
 {
 	/* install boot code shared by all CPUs */
-	shmobile_boot_fn = virt_to_phys(shmobile_smp_boot);
+	shmobile_boot_fn = __pa_symbol(shmobile_smp_boot);
 }
 
 void __init shmobile_smp_apmu_prepare_cpus(unsigned int max_cpus,
@@ -204,7 +204,7 @@ void __init shmobile_smp_apmu_prepare_cpus(unsigned int max_cpus,
 int shmobile_smp_apmu_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
 	/* For this particular CPU register boot vector */
-	shmobile_smp_hook(cpu, virt_to_phys(secondary_startup), 0);
+	shmobile_smp_hook(cpu, __pa_symbol(secondary_startup), 0);
 
 	return apmu_wrap(cpu, apmu_power_on);
 }
@@ -308,7 +308,7 @@ int shmobile_smp_apmu_cpu_kill(unsigned int cpu)
 #if defined(CONFIG_SUSPEND)
 static int shmobile_smp_apmu_do_suspend(unsigned long cpu)
 {
-	shmobile_smp_hook(cpu, virt_to_phys(cpu_resume), 0);
+	shmobile_smp_hook(cpu, __pa_symbol(cpu_resume), 0);
 	shmobile_smp_apmu_cpu_shutdown(cpu);
 	cpu_do_idle(); /* WFI selects Core Standby */
 	return 1;

arch/arm/mach-shmobile/platsmp-scu.c

@@ -24,7 +24,7 @@ static void __iomem *shmobile_scu_base;
 static int shmobile_scu_cpu_prepare(unsigned int cpu)
 {
 	/* For this particular CPU register SCU SMP boot vector */
-	shmobile_smp_hook(cpu, virt_to_phys(shmobile_boot_scu),
+	shmobile_smp_hook(cpu, __pa_symbol(shmobile_boot_scu),
 			  shmobile_scu_base_phys);
 	return 0;
 }
@@ -33,7 +33,7 @@ void __init shmobile_smp_scu_prepare_cpus(phys_addr_t scu_base_phys,
 					  unsigned int max_cpus)
 {
 	/* install boot code shared by all CPUs */
-	shmobile_boot_fn = virt_to_phys(shmobile_smp_boot);
+	shmobile_boot_fn = __pa_symbol(shmobile_smp_boot);
 
 	/* enable SCU and cache coherency on booting CPU */
 	shmobile_scu_base_phys = scu_base_phys;

arch/arm/mach-socfpga/platsmp.c

@@ -40,7 +40,7 @@ static int socfpga_boot_secondary(unsigned int cpu, struct task_struct *idle)
 
 		memcpy(phys_to_virt(0), &secondary_trampoline, trampoline_size);
 
-		writel(virt_to_phys(secondary_startup),
+		writel(__pa_symbol(secondary_startup),
 		       sys_manager_base_addr + (socfpga_cpu1start_addr & 0x000000ff));
 
 		flush_cache_all();
@@ -63,7 +63,7 @@ static int socfpga_a10_boot_secondary(unsigned int cpu, struct task_struct *idle
 		       SOCFPGA_A10_RSTMGR_MODMPURST);
 		memcpy(phys_to_virt(0), &secondary_trampoline, trampoline_size);
 
-		writel(virt_to_phys(secondary_startup),
+		writel(__pa_symbol(secondary_startup),
 		       sys_manager_base_addr + (socfpga_cpu1start_addr & 0x00000fff));
 
 		flush_cache_all();

arch/arm/mach-spear/platsmp.c

@@ -117,7 +117,7 @@ static void __init spear13xx_smp_prepare_cpus(unsigned int max_cpus)
 	 * (presently it is in SRAM). The BootMonitor waits until it receives a
 	 * soft interrupt, and then the secondary CPU branches to this address.
 	 */
-	__raw_writel(virt_to_phys(spear13xx_secondary_startup), SYS_LOCATION);
+	__raw_writel(__pa_symbol(spear13xx_secondary_startup), SYS_LOCATION);
 }
 
 const struct smp_operations spear13xx_smp_ops __initconst = {

arch/arm/mach-sti/platsmp.c

@@ -103,7 +103,7 @@ static void __init sti_smp_prepare_cpus(unsigned int max_cpus)
 	u32 __iomem *cpu_strt_ptr;
 	u32 release_phys;
 	int cpu;
-	unsigned long entry_pa = virt_to_phys(sti_secondary_startup);
+	unsigned long entry_pa = __pa_symbol(sti_secondary_startup);
 
 	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
 

arch/arm/mach-sunxi/platsmp.c

@@ -80,7 +80,7 @@ static int sun6i_smp_boot_secondary(unsigned int cpu,
 	spin_lock(&cpu_lock);
 
 	/* Set CPU boot address */
-	writel(virt_to_phys(secondary_startup),
+	writel(__pa_symbol(secondary_startup),
 	       cpucfg_membase + CPUCFG_PRIVATE0_REG);
 
 	/* Assert the CPU core in reset */
@@ -162,7 +162,7 @@ static int sun8i_smp_boot_secondary(unsigned int cpu,
 	spin_lock(&cpu_lock);
 
 	/* Set CPU boot address */
-	writel(virt_to_phys(secondary_startup),
+	writel(__pa_symbol(secondary_startup),
 	       cpucfg_membase + CPUCFG_PRIVATE0_REG);
 
 	/* Assert the CPU core in reset */

arch/arm/mach-tango/platsmp.c

@@ -5,7 +5,7 @@
 
 static int tango_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
-	tango_set_aux_boot_addr(virt_to_phys(secondary_startup));
+	tango_set_aux_boot_addr(__pa_symbol(secondary_startup));
 	tango_start_aux_core(cpu);
 	return 0;
 }

arch/arm/mach-tango/pm.c

@@ -5,7 +5,7 @@
 
 static int tango_pm_powerdown(unsigned long arg)
 {
-	tango_suspend(virt_to_phys(cpu_resume));
+	tango_suspend(__pa_symbol(cpu_resume));
 
 	return -EIO; /* tango_suspend has failed */
 }

arch/arm/mach-tegra/reset.c

@@ -94,14 +94,14 @@ void __init tegra_cpu_reset_handler_init(void)
 	__tegra_cpu_reset_handler_data[TEGRA_RESET_MASK_PRESENT] =
 		*((u32 *)cpu_possible_mask);
 	__tegra_cpu_reset_handler_data[TEGRA_RESET_STARTUP_SECONDARY] =
-		virt_to_phys((void *)secondary_startup);
+		__pa_symbol((void *)secondary_startup);
 #endif
 
 #ifdef CONFIG_PM_SLEEP
 	__tegra_cpu_reset_handler_data[TEGRA_RESET_STARTUP_LP1] =
 		TEGRA_IRAM_LPx_RESUME_AREA;
 	__tegra_cpu_reset_handler_data[TEGRA_RESET_STARTUP_LP2] =
-		virt_to_phys((void *)tegra_resume);
+		__pa_symbol((void *)tegra_resume);
 #endif
 
 	tegra_cpu_reset_handler_enable();

arch/arm/mach-ux500/platsmp.c

@@ -79,7 +79,7 @@ static int ux500_boot_secondary(unsigned int cpu, struct task_struct *idle)
 	 * backup ram register at offset 0x1FF0, which is what boot rom code
 	 * is waiting for. This will wake up the secondary core from WFE.
 	 */
-	writel(virt_to_phys(secondary_startup),
+	writel(__pa_symbol(secondary_startup),
 	       backupram + UX500_CPU1_JUMPADDR_OFFSET);
 	writel(0xA1FEED01,
 	       backupram + UX500_CPU1_WAKEMAGIC_OFFSET);

arch/arm/mach-vexpress/dcscb.c

@@ -166,7 +166,7 @@ static int __init dcscb_init(void)
 	 * Future entries into the kernel can now go
 	 * through the cluster entry vectors.
 	 */
-	vexpress_flags_set(virt_to_phys(mcpm_entry_point));
+	vexpress_flags_set(__pa_symbol(mcpm_entry_point));
 
 	return 0;
 }

arch/arm/mach-vexpress/platsmp.c

@@ -79,7 +79,7 @@ static void __init vexpress_smp_dt_prepare_cpus(unsigned int max_cpus)
 	 * until it receives a soft interrupt, and then the
 	 * secondary CPU branches to this address.
 	 */
-	vexpress_flags_set(virt_to_phys(versatile_secondary_startup));
+	vexpress_flags_set(__pa_symbol(versatile_secondary_startup));
 }
 
 const struct smp_operations vexpress_smp_dt_ops __initconst = {

arch/arm/mach-vexpress/tc2_pm.c

@@ -54,7 +54,7 @@ static int tc2_pm_cpu_powerup(unsigned int cpu, unsigned int cluster)
 	if (cluster >= TC2_CLUSTERS || cpu >= tc2_nr_cpus[cluster])
 		return -EINVAL;
 	ve_spc_set_resume_addr(cluster, cpu,
-			       virt_to_phys(mcpm_entry_point));
+			       __pa_symbol(mcpm_entry_point));
 	ve_spc_cpu_wakeup_irq(cluster, cpu, true);
 	return 0;
 }
@@ -159,7 +159,7 @@ static int tc2_pm_wait_for_powerdown(unsigned int cpu, unsigned int cluster)
 
 static void tc2_pm_cpu_suspend_prepare(unsigned int cpu, unsigned int cluster)
 {
-	ve_spc_set_resume_addr(cluster, cpu, virt_to_phys(mcpm_entry_point));
+	ve_spc_set_resume_addr(cluster, cpu, __pa_symbol(mcpm_entry_point));
 }
 
 static void tc2_pm_cpu_is_up(unsigned int cpu, unsigned int cluster)

arch/arm/mach-zx/platsmp.c

@@ -76,7 +76,7 @@ void __init zx_smp_prepare_cpus(unsigned int max_cpus)
 	 * until it receives a soft interrupt, and then the
 	 * secondary CPU branches to this address.
 	 */
-	__raw_writel(virt_to_phys(zx_secondary_startup),
+	__raw_writel(__pa_symbol(zx_secondary_startup),
 		     aonsysctrl_base + AON_SYS_CTRL_RESERVED1);
 
 	iounmap(aonsysctrl_base);
@@ -94,7 +94,7 @@ void __init zx_smp_prepare_cpus(unsigned int max_cpus)
 
 	/* Map the first 4 KB IRAM for suspend usage */
 	sys_iram = __arm_ioremap_exec(ZX_IRAM_BASE, PAGE_SIZE, false);
-	zx_secondary_startup_pa = virt_to_phys(zx_secondary_startup);
+	zx_secondary_startup_pa = __pa_symbol(zx_secondary_startup);
 	fncpy(sys_iram, &zx_resume_jump, zx_suspend_iram_sz);
 }
 

arch/arm/mach-zynq/platsmp.c

@@ -89,7 +89,7 @@ EXPORT_SYMBOL(zynq_cpun_start);
 
 static int zynq_boot_secondary(unsigned int cpu, struct task_struct *idle)
 {
-	return zynq_cpun_start(virt_to_phys(secondary_startup), cpu);
+	return zynq_cpun_start(__pa_symbol(secondary_startup), cpu);
 }
 
 /*

arch/arm/mm/Kconfig

@@ -29,6 +29,7 @@ config CPU_ARM720T
 	select CPU_COPY_V4WT if MMU
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WT if MMU
 	help
 	  A 32-bit RISC processor with 8kByte Cache, Write Buffer and
@@ -46,6 +47,7 @@ config CPU_ARM740T
 	select CPU_CACHE_V4
 	select CPU_CP15_MPU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	help
 	  A 32-bit RISC processor with 8KB cache or 4KB variants,
 	  write buffer and MPU(Protection Unit) built around
@@ -79,6 +81,7 @@ config CPU_ARM920T
 	select CPU_COPY_V4WB if MMU
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
 	help
 	  The ARM920T is licensed to be produced by numerous vendors,
@@ -97,6 +100,7 @@ config CPU_ARM922T
 	select CPU_COPY_V4WB if MMU
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
 	help
 	  The ARM922T is a version of the ARM920T, but with smaller
@@ -116,6 +120,7 @@ config CPU_ARM925T
 	select CPU_COPY_V4WB if MMU
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
  	help
  	  The ARM925T is a mix between the ARM920T and ARM926T, but with
@@ -134,6 +139,7 @@ config CPU_ARM926T
 	select CPU_COPY_V4WB if MMU
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
 	help
 	  This is a variant of the ARM920.  It has slightly different
@@ -170,6 +176,7 @@ config CPU_ARM940T
 	select CPU_CACHE_VIVT
 	select CPU_CP15_MPU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	help
 	  ARM940T is a member of the ARM9TDMI family of general-
 	  purpose microprocessors with MPU and separate 4KB
@@ -188,6 +195,7 @@ config CPU_ARM946E
 	select CPU_CACHE_VIVT
 	select CPU_CP15_MPU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	help
 	  ARM946E-S is a member of the ARM9E-S family of high-
 	  performance, 32-bit system-on-chip processor solutions.
@@ -206,6 +214,7 @@ config CPU_ARM1020
 	select CPU_COPY_V4WB if MMU
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
 	help
 	  The ARM1020 is the 32K cached version of the ARM10 processor,
@@ -225,6 +234,7 @@ config CPU_ARM1020E
 	select CPU_COPY_V4WB if MMU
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
 
 # ARM1022E
@@ -236,6 +246,7 @@ config CPU_ARM1022
 	select CPU_COPY_V4WB if MMU # can probably do better
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
 	help
 	  The ARM1022E is an implementation of the ARMv5TE architecture
@@ -254,6 +265,7 @@ config CPU_ARM1026
 	select CPU_COPY_V4WB if MMU # can probably do better
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
 	help
 	  The ARM1026EJ-S is an implementation of the ARMv5TEJ architecture
@@ -302,6 +314,7 @@ config CPU_XSCALE
 	select CPU_CACHE_VIVT
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
 
 # XScale Core Version 3
@@ -312,6 +325,7 @@ config CPU_XSC3
 	select CPU_CACHE_VIVT
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
 	select IO_36
 
@@ -324,6 +338,7 @@ config CPU_MOHAWK
 	select CPU_COPY_V4WB if MMU
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V4WBI if MMU
 
 # Feroceon
@@ -335,6 +350,7 @@ config CPU_FEROCEON
 	select CPU_COPY_FEROCEON if MMU
 	select CPU_CP15_MMU
 	select CPU_PABRT_LEGACY
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_FEROCEON if MMU
 
 config CPU_FEROCEON_OLD_ID
@@ -367,6 +383,7 @@ config CPU_V6
 	select CPU_CP15_MMU
 	select CPU_HAS_ASID if MMU
 	select CPU_PABRT_V6
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V6 if MMU
 
 # ARMv6k
@@ -381,6 +398,7 @@ config CPU_V6K
 	select CPU_CP15_MMU
 	select CPU_HAS_ASID if MMU
 	select CPU_PABRT_V6
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V6 if MMU
 
 # ARMv7
@@ -396,6 +414,7 @@ config CPU_V7
 	select CPU_CP15_MPU if !MMU
 	select CPU_HAS_ASID if MMU
 	select CPU_PABRT_V7
+	select CPU_THUMB_CAPABLE
 	select CPU_TLB_V7 if MMU
 
 # ARMv7M
@@ -410,11 +429,17 @@ config CPU_V7M
 
 config CPU_THUMBONLY
 	bool
+	select CPU_THUMB_CAPABLE
 	# There are no CPUs available with MMU that don't implement an ARM ISA:
 	depends on !MMU
 	help
 	  Select this if your CPU doesn't support the 32 bit ARM instructions.
 
+config CPU_THUMB_CAPABLE
+	bool
+	help
+	  Select this if your CPU can support Thumb mode.
+
 # Figure out what processor architecture version we should be using.
 # This defines the compiler instruction set which depends on the machine type.
 config CPU_32v3
@@ -655,11 +680,7 @@ config ARCH_DMA_ADDR_T_64BIT
 
 config ARM_THUMB
 	bool "Support Thumb user binaries" if !CPU_THUMBONLY
-	depends on CPU_ARM720T || CPU_ARM740T || CPU_ARM920T || CPU_ARM922T || \
-		CPU_ARM925T || CPU_ARM926T || CPU_ARM940T || CPU_ARM946E || \
-		CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
-		CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_V6 || CPU_V6K || \
-		CPU_V7 || CPU_FEROCEON || CPU_V7M
+	depends on CPU_THUMB_CAPABLE
 	default y
 	help
 	  Say Y if you want to include kernel support for running user space

arch/arm/mm/Makefile

@@ -14,6 +14,7 @@ endif
 
 obj-$(CONFIG_ARM_PTDUMP)	+= dump.o
 obj-$(CONFIG_MODULES)		+= proc-syms.o
+obj-$(CONFIG_DEBUG_VIRTUAL)	+= physaddr.o
 
 obj-$(CONFIG_ALIGNMENT_TRAP)	+= alignment.o
 obj-$(CONFIG_HIGHMEM)		+= highmem.o

arch/arm/mm/cache-uniphier.c

@@ -15,6 +15,7 @@
 
 #define pr_fmt(fmt)		"uniphier: " fmt
 
+#include <linux/bitops.h>
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/log2.h>
@@ -71,8 +72,7 @@
  * @ctrl_base: virtual base address of control registers
  * @rev_base: virtual base address of revision registers
  * @op_base: virtual base address of operation registers
- * @way_present_mask: each bit specifies if the way is present
- * @way_locked_mask: each bit specifies if the way is locked
+ * @way_mask: each bit specifies if the way is present
  * @nsets: number of associativity sets
  * @line_size: line size in bytes
  * @range_op_max_size: max size that can be handled by a single range operation
@@ -83,8 +83,7 @@ struct uniphier_cache_data {
 	void __iomem *rev_base;
 	void __iomem *op_base;
 	void __iomem *way_ctrl_base;
-	u32 way_present_mask;
-	u32 way_locked_mask;
+	u32 way_mask;
 	u32 nsets;
 	u32 line_size;
 	u32 range_op_max_size;
@@ -234,17 +233,13 @@ static void __uniphier_cache_enable(struct uniphier_cache_data *data, bool on)
 	writel_relaxed(val, data->ctrl_base + UNIPHIER_SSCC);
 }
 
-static void __init __uniphier_cache_set_locked_ways(
-					struct uniphier_cache_data *data,
-					u32 way_mask)
+static void __init __uniphier_cache_set_active_ways(
+					struct uniphier_cache_data *data)
 {
 	unsigned int cpu;
 
-	data->way_locked_mask = way_mask & data->way_present_mask;
-
 	for_each_possible_cpu(cpu)
-		writel_relaxed(~data->way_locked_mask & data->way_present_mask,
-			       data->way_ctrl_base + 4 * cpu);
+		writel_relaxed(data->way_mask, data->way_ctrl_base + 4 * cpu);
 }
 
 static void uniphier_cache_maint_range(unsigned long start, unsigned long end,
@@ -307,7 +302,7 @@ static void __init uniphier_cache_enable(void)
 
 	list_for_each_entry(data, &uniphier_cache_list, list) {
 		__uniphier_cache_enable(data, true);
-		__uniphier_cache_set_locked_ways(data, 0);
+		__uniphier_cache_set_active_ways(data);
 	}
 }
 
@@ -382,8 +377,8 @@ static int __init __uniphier_cache_init(struct device_node *np,
 		goto err;
 	}
 
-	data->way_present_mask =
-		((u32)1 << cache_size / data->nsets / data->line_size) - 1;
+	data->way_mask = GENMASK(cache_size / data->nsets / data->line_size - 1,
+				 0);
 
 	data->ctrl_base = of_iomap(np, 0);
 	if (!data->ctrl_base) {

arch/arm/mm/dma-mapping.c

@@ -870,6 +870,9 @@ static int __arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
 				      vma->vm_end - vma->vm_start,
 				      vma->vm_page_prot);
 	}
+#else
+	ret = vm_iomap_memory(vma, vma->vm_start,
+			      (vma->vm_end - vma->vm_start));
 #endif	/* CONFIG_MMU */
 
 	return ret;

arch/arm/mm/dump.c

@@ -18,6 +18,7 @@
 #include <linux/seq_file.h>
 
 #include <asm/fixmap.h>
+#include <asm/memory.h>
 #include <asm/pgtable.h>
 
 struct addr_marker {
@@ -31,8 +32,8 @@ static struct addr_marker address_markers[] = {
 	{ 0,			"vmalloc() Area" },
 	{ VMALLOC_END,		"vmalloc() End" },
 	{ FIXADDR_START,	"Fixmap Area" },
-	{ CONFIG_VECTORS_BASE,	"Vectors" },
-	{ CONFIG_VECTORS_BASE + PAGE_SIZE * 2, "Vectors End" },
+	{ VECTORS_BASE,	"Vectors" },
+	{ VECTORS_BASE + PAGE_SIZE * 2, "Vectors End" },
 	{ -1,			NULL },
 };
 

arch/arm/mm/flush.c

@@ -327,6 +327,12 @@ void flush_dcache_page(struct page *page)
 	if (page == ZERO_PAGE(0))
 		return;
 
+	if (!cache_ops_need_broadcast() && cache_is_vipt_nonaliasing()) {
+		if (test_bit(PG_dcache_clean, &page->flags))
+			clear_bit(PG_dcache_clean, &page->flags);
+		return;
+	}
+
 	mapping = page_mapping(page);
 
 	if (!cache_ops_need_broadcast() &&

arch/arm/mm/init.c

@@ -27,6 +27,7 @@
 #include <asm/cp15.h>
 #include <asm/mach-types.h>
 #include <asm/memblock.h>
+#include <asm/memory.h>
 #include <asm/prom.h>
 #include <asm/sections.h>
 #include <asm/setup.h>
@@ -227,41 +228,59 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
 	return phys;
 }
 
-void __init arm_memblock_init(const struct machine_desc *mdesc)
+static void __init arm_initrd_init(void)
 {
-	/* Register the kernel text, kernel data and initrd with memblock. */
-#ifdef CONFIG_XIP_KERNEL
-	memblock_reserve(__pa(_sdata), _end - _sdata);
-#else
-	memblock_reserve(__pa(_stext), _end - _stext);
-#endif
 #ifdef CONFIG_BLK_DEV_INITRD
+	phys_addr_t start;
+	unsigned long size;
+
 	/* FDT scan will populate initrd_start */
 	if (initrd_start && !phys_initrd_size) {
 		phys_initrd_start = __virt_to_phys(initrd_start);
 		phys_initrd_size = initrd_end - initrd_start;
 	}
+
 	initrd_start = initrd_end = 0;
-	if (phys_initrd_size &&
-	    !memblock_is_region_memory(phys_initrd_start, phys_initrd_size)) {
+
+	if (!phys_initrd_size)
+		return;
+
+	/*
+	 * Round the memory region to page boundaries as per free_initrd_mem()
+	 * This allows us to detect whether the pages overlapping the initrd
+	 * are in use, but more importantly, reserves the entire set of pages
+	 * as we don't want these pages allocated for other purposes.
+	 */
+	start = round_down(phys_initrd_start, PAGE_SIZE);
+	size = phys_initrd_size + (phys_initrd_start - start);
+	size = round_up(size, PAGE_SIZE);
+
+	if (!memblock_is_region_memory(start, size)) {
 		pr_err("INITRD: 0x%08llx+0x%08lx is not a memory region - disabling initrd\n",
-		       (u64)phys_initrd_start, phys_initrd_size);
-		phys_initrd_start = phys_initrd_size = 0;
+		       (u64)start, size);
+		return;
 	}
-	if (phys_initrd_size &&
-	    memblock_is_region_reserved(phys_initrd_start, phys_initrd_size)) {
+
+	if (memblock_is_region_reserved(start, size)) {
 		pr_err("INITRD: 0x%08llx+0x%08lx overlaps in-use memory region - disabling initrd\n",
-		       (u64)phys_initrd_start, phys_initrd_size);
-		phys_initrd_start = phys_initrd_size = 0;
+		       (u64)start, size);
+		return;
 	}
-	if (phys_initrd_size) {
-		memblock_reserve(phys_initrd_start, phys_initrd_size);
+
+	memblock_reserve(start, size);
 
 	/* Now convert initrd to virtual addresses */
 	initrd_start = __phys_to_virt(phys_initrd_start);
 	initrd_end = initrd_start + phys_initrd_size;
-	}
 #endif
+}
+
+void __init arm_memblock_init(const struct machine_desc *mdesc)
+{
+	/* Register the kernel text, kernel data and initrd with memblock. */
+	memblock_reserve(__pa(KERNEL_START), KERNEL_END - KERNEL_START);
+
+	arm_initrd_init();
 
 	arm_mm_memblock_reserve();
 
@@ -521,8 +540,7 @@ void __init mem_init(void)
 			"      .data : 0x%p" " - 0x%p" "   (%4td kB)\n"
 			"       .bss : 0x%p" " - 0x%p" "   (%4td kB)\n",
 
-			MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
-				(PAGE_SIZE)),
+			MLK(VECTORS_BASE, VECTORS_BASE + PAGE_SIZE),
 #ifdef CONFIG_HAVE_TCM
 			MLK(DTCM_OFFSET, (unsigned long) dtcm_end),
 			MLK(ITCM_OFFSET, (unsigned long) itcm_end),

arch/arm/mm/mmu.c

@@ -1152,13 +1152,12 @@ early_param("vmalloc", early_vmalloc);
 
 phys_addr_t arm_lowmem_limit __initdata = 0;
 
-void __init sanity_check_meminfo(void)
+void __init adjust_lowmem_bounds(void)
 {
 	phys_addr_t memblock_limit = 0;
-	int highmem = 0;
 	u64 vmalloc_limit;
 	struct memblock_region *reg;
-	bool should_use_highmem = false;
+	phys_addr_t lowmem_limit = 0;
 
 	/*
 	 * Let's use our own (unoptimized) equivalent of __pa() that is
@@ -1172,43 +1171,18 @@ void __init sanity_check_meminfo(void)
 	for_each_memblock(memory, reg) {
 		phys_addr_t block_start = reg->base;
 		phys_addr_t block_end = reg->base + reg->size;
-		phys_addr_t size_limit = reg->size;
 
-		if (reg->base >= vmalloc_limit)
-			highmem = 1;
-		else
-			size_limit = vmalloc_limit - reg->base;
-
-
-		if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
-
-			if (highmem) {
-				pr_notice("Ignoring RAM at %pa-%pa (!CONFIG_HIGHMEM)\n",
-					  &block_start, &block_end);
-				memblock_remove(reg->base, reg->size);
-				should_use_highmem = true;
-				continue;
-			}
-
-			if (reg->size > size_limit) {
-				phys_addr_t overlap_size = reg->size - size_limit;
-
-				pr_notice("Truncating RAM at %pa-%pa",
-					  &block_start, &block_end);
-				block_end = vmalloc_limit;
-				pr_cont(" to -%pa", &block_end);
-				memblock_remove(vmalloc_limit, overlap_size);
-				should_use_highmem = true;
-			}
-		}
-
-		if (!highmem) {
-			if (block_end > arm_lowmem_limit) {
-				if (reg->size > size_limit)
-					arm_lowmem_limit = vmalloc_limit;
-				else
-					arm_lowmem_limit = block_end;
-			}
+		if (reg->base < vmalloc_limit) {
+			if (block_end > lowmem_limit)
+				/*
+				 * Compare as u64 to ensure vmalloc_limit does
+				 * not get truncated. block_end should always
+				 * fit in phys_addr_t so there should be no
+				 * issue with assignment.
+				 */
+				lowmem_limit = min_t(u64,
+							 vmalloc_limit,
+							 block_end);
 
 			/*
 			 * Find the first non-pmd-aligned page, and point
@@ -1227,14 +1201,13 @@ void __init sanity_check_meminfo(void)
 				if (!IS_ALIGNED(block_start, PMD_SIZE))
 					memblock_limit = block_start;
 				else if (!IS_ALIGNED(block_end, PMD_SIZE))
-					memblock_limit = arm_lowmem_limit;
+					memblock_limit = lowmem_limit;
 			}
 
 		}
 	}
 
-	if (should_use_highmem)
-		pr_notice("Consider using a HIGHMEM enabled kernel.\n");
+	arm_lowmem_limit = lowmem_limit;
 
 	high_memory = __va(arm_lowmem_limit - 1) + 1;
 
@@ -1248,6 +1221,18 @@ void __init sanity_check_meminfo(void)
 	if (!memblock_limit)
 		memblock_limit = arm_lowmem_limit;
 
+	if (!IS_ENABLED(CONFIG_HIGHMEM) || cache_is_vipt_aliasing()) {
+		if (memblock_end_of_DRAM() > arm_lowmem_limit) {
+			phys_addr_t end = memblock_end_of_DRAM();
+
+			pr_notice("Ignoring RAM at %pa-%pa\n",
+				  &memblock_limit, &end);
+			pr_notice("Consider using a HIGHMEM enabled kernel.\n");
+
+			memblock_remove(memblock_limit, end - memblock_limit);
+		}
+	}
+
 	memblock_set_current_limit(memblock_limit);
 }
 
@@ -1437,11 +1422,7 @@ static void __init kmap_init(void)
 static void __init map_lowmem(void)
 {
 	struct memblock_region *reg;
-#ifdef CONFIG_XIP_KERNEL
-	phys_addr_t kernel_x_start = round_down(__pa(_sdata), SECTION_SIZE);
-#else
-	phys_addr_t kernel_x_start = round_down(__pa(_stext), SECTION_SIZE);
-#endif
+	phys_addr_t kernel_x_start = round_down(__pa(KERNEL_START), SECTION_SIZE);
 	phys_addr_t kernel_x_end = round_up(__pa(__init_end), SECTION_SIZE);
 
 	/* Map all the lowmem memory banks. */

arch/arm/mm/nommu.c

@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 
 #include <asm/cacheflush.h>
+#include <asm/cp15.h>
 #include <asm/sections.h>
 #include <asm/page.h>
 #include <asm/setup.h>
@@ -22,6 +23,8 @@
 
 #include "mm.h"
 
+unsigned long vectors_base;
+
 #ifdef CONFIG_ARM_MPU
 struct mpu_rgn_info mpu_rgn_info;
 
@@ -85,7 +88,7 @@ static unsigned long irbar_read(void)
 }
 
 /* MPU initialisation functions */
-void __init sanity_check_meminfo_mpu(void)
+void __init adjust_lowmem_bounds_mpu(void)
 {
 	phys_addr_t phys_offset = PHYS_OFFSET;
 	phys_addr_t aligned_region_size, specified_mem_size, rounded_mem_size;
@@ -274,19 +277,64 @@ void __init mpu_setup(void)
 	}
 }
 #else
-static void sanity_check_meminfo_mpu(void) {}
+static void adjust_lowmem_bounds_mpu(void) {}
 static void __init mpu_setup(void) {}
 #endif /* CONFIG_ARM_MPU */
 
+#ifdef CONFIG_CPU_CP15
+#ifdef CONFIG_CPU_HIGH_VECTOR
+static unsigned long __init setup_vectors_base(void)
+{
+	unsigned long reg = get_cr();
+
+	set_cr(reg | CR_V);
+	return 0xffff0000;
+}
+#else /* CONFIG_CPU_HIGH_VECTOR */
+/* Write exception base address to VBAR */
+static inline void set_vbar(unsigned long val)
+{
+	asm("mcr p15, 0, %0, c12, c0, 0" : : "r" (val) : "cc");
+}
+
+/*
+ * Security extensions, bits[7:4], permitted values,
+ * 0b0000 - not implemented, 0b0001/0b0010 - implemented
+ */
+static inline bool security_extensions_enabled(void)
+{
+	return !!cpuid_feature_extract(CPUID_EXT_PFR1, 4);
+}
+
+static unsigned long __init setup_vectors_base(void)
+{
+	unsigned long base = 0, reg = get_cr();
+
+	set_cr(reg & ~CR_V);
+	if (security_extensions_enabled()) {
+		if (IS_ENABLED(CONFIG_REMAP_VECTORS_TO_RAM))
+			base = CONFIG_DRAM_BASE;
+		set_vbar(base);
+	} else if (IS_ENABLED(CONFIG_REMAP_VECTORS_TO_RAM)) {
+		if (CONFIG_DRAM_BASE != 0)
+			pr_err("Security extensions not enabled, vectors cannot be remapped to RAM, vectors base will be 0x00000000\n");
+	}
+
+	return base;
+}
+#endif /* CONFIG_CPU_HIGH_VECTOR */
+#endif /* CONFIG_CPU_CP15 */
+
 void __init arm_mm_memblock_reserve(void)
 {
 #ifndef CONFIG_CPU_V7M
+	vectors_base = IS_ENABLED(CONFIG_CPU_CP15) ? setup_vectors_base() : 0;
 	/*
 	 * Register the exception vector page.
 	 * some architectures which the DRAM is the exception vector to trap,
 	 * alloc_page breaks with error, although it is not NULL, but "0."
 	 */
-	memblock_reserve(CONFIG_VECTORS_BASE, 2 * PAGE_SIZE);
+	memblock_reserve(vectors_base, 2 * PAGE_SIZE);
 #else /* ifndef CONFIG_CPU_V7M */
 	/*
 	 * There is no dedicated vector page on V7-M. So nothing needs to be
@@ -295,10 +343,10 @@ void __init arm_mm_memblock_reserve(void)
 #endif
 }
 
-void __init sanity_check_meminfo(void)
+void __init adjust_lowmem_bounds(void)
 {
 	phys_addr_t end;
-	sanity_check_meminfo_mpu();
+	adjust_lowmem_bounds_mpu();
 	end = memblock_end_of_DRAM();
 	high_memory = __va(end - 1) + 1;
 	memblock_set_current_limit(end);
@@ -310,7 +358,7 @@ void __init sanity_check_meminfo(void)
  */
 void __init paging_init(const struct machine_desc *mdesc)
 {
-	early_trap_init((void *)CONFIG_VECTORS_BASE);
+	early_trap_init((void *)vectors_base);
 	mpu_setup();
 	bootmem_init();
 }

arch/arm/mm/physaddr.c

+#include <linux/bug.h>
+#include <linux/export.h>
+#include <linux/types.h>
+#include <linux/mmdebug.h>
+#include <linux/mm.h>
+
+#include <asm/sections.h>
+#include <asm/memory.h>
+#include <asm/fixmap.h>
+#include <asm/dma.h>
+
+#include "mm.h"
+
+static inline bool __virt_addr_valid(unsigned long x)
+{
+	/*
+	 * high_memory does not get immediately defined, and there
+	 * are early callers of __pa() against PAGE_OFFSET
+	 */
+	if (!high_memory && x >= PAGE_OFFSET)
+		return true;
+
+	if (high_memory && x >= PAGE_OFFSET && x < (unsigned long)high_memory)
+		return true;
+
+	/*
+	 * MAX_DMA_ADDRESS is a virtual address that may not correspond to an
+	 * actual physical address. Enough code relies on __pa(MAX_DMA_ADDRESS)
+	 * that we just need to work around it and always return true.
+	 */
+	if (x == MAX_DMA_ADDRESS)
+		return true;
+
+	return false;
+}
+
+phys_addr_t __virt_to_phys(unsigned long x)
+{
+	WARN(!__virt_addr_valid(x),
+	     "virt_to_phys used for non-linear address: %pK (%pS)\n",
+	     (void *)x, (void *)x);
+
+	return __virt_to_phys_nodebug(x);
+}
+EXPORT_SYMBOL(__virt_to_phys);
+
+phys_addr_t __phys_addr_symbol(unsigned long x)
+{
+	/* This is bounds checking against the kernel image only.
+	 * __pa_symbol should only be used on kernel symbol addresses.
+	 */
+	VIRTUAL_BUG_ON(x < (unsigned long)KERNEL_START ||
+		       x > (unsigned long)KERNEL_END);
+
+	return __pa_symbol_nodebug(x);
+}
+EXPORT_SYMBOL(__phys_addr_symbol);

drivers/mtd/devices/lart.c

@@ -75,18 +75,18 @@ static char module_name[] = "lart";
 
 /* blob */
 #define NUM_BLOB_BLOCKS		FLASH_NUMBLOCKS_16m_PARAM
-#define BLOB_START			0x00000000
-#define BLOB_LEN			(NUM_BLOB_BLOCKS * FLASH_BLOCKSIZE_PARAM)
+#define PART_BLOB_START		0x00000000
+#define PART_BLOB_LEN		(NUM_BLOB_BLOCKS * FLASH_BLOCKSIZE_PARAM)
 
 /* kernel */
 #define NUM_KERNEL_BLOCKS	7
-#define KERNEL_START		(BLOB_START + BLOB_LEN)
-#define KERNEL_LEN			(NUM_KERNEL_BLOCKS * FLASH_BLOCKSIZE_MAIN)
+#define PART_KERNEL_START	(PART_BLOB_START + PART_BLOB_LEN)
+#define PART_KERNEL_LEN		(NUM_KERNEL_BLOCKS * FLASH_BLOCKSIZE_MAIN)
 
 /* initial ramdisk */
 #define NUM_INITRD_BLOCKS	24
-#define INITRD_START		(KERNEL_START + KERNEL_LEN)
-#define INITRD_LEN			(NUM_INITRD_BLOCKS * FLASH_BLOCKSIZE_MAIN)
+#define PART_INITRD_START	(PART_KERNEL_START + PART_KERNEL_LEN)
+#define PART_INITRD_LEN		(NUM_INITRD_BLOCKS * FLASH_BLOCKSIZE_MAIN)
 
 /*
  * See section 4.0 in "3 Volt Fast Boot Block Flash Memory" Intel Datasheet
@@ -587,20 +587,20 @@ static struct mtd_partition lart_partitions[] = {
 	/* blob */
 	{
 		.name	= "blob",
-		.offset	= BLOB_START,
-		.size	= BLOB_LEN,
+		.offset	= PART_BLOB_START,
+		.size	= PART_BLOB_LEN,
 	},
 	/* kernel */
 	{
 		.name	= "kernel",
-		.offset	= KERNEL_START,		/* MTDPART_OFS_APPEND */
-		.size	= KERNEL_LEN,
+		.offset	= PART_KERNEL_START,	/* MTDPART_OFS_APPEND */
+		.size	= PART_KERNEL_LEN,
 	},
 	/* initial ramdisk / file system */
 	{
 		.name	= "file system",
-		.offset	= INITRD_START,		/* MTDPART_OFS_APPEND */
-		.size	= INITRD_LEN,		/* MTDPART_SIZ_FULL */
+		.offset	= PART_INITRD_START,	/* MTDPART_OFS_APPEND */
+		.size	= PART_INITRD_LEN,	/* MTDPART_SIZ_FULL */
 	}
 };
 #define NUM_PARTITIONS ARRAY_SIZE(lart_partitions)