--- zzzz-none-000/linux-4.4.271/arch/arm/mm/mmu.c	2021-06-03 06:22:09.000000000 +0000
+++ dakota-7530ac-750/linux-4.4.271/arch/arm/mm/mmu.c	2023-01-11 09:25:41.000000000 +0000
@@ -20,6 +20,7 @@
 
 #include <asm/cp15.h>
 #include <asm/cputype.h>
+#include <asm/kasan.h>
 #include <asm/sections.h>
 #include <asm/cachetype.h>
 #include <asm/fixmap.h>
@@ -37,6 +38,9 @@
 #include <asm/mach/map.h>
 #include <asm/mach/pci.h>
 #include <asm/fixmap.h>
+#if defined(CONFIG_AVM_BOOTMEM)
+#include <asm/mach_avm.h>
+#endif/*--- #if defined(CONFIG_AVM_BOOTMEM) ---*/
 
 #include "fault.h"
 #include "mm.h"
@@ -63,7 +67,7 @@
 #define CPOLICY_WRITEALLOC	4
 
 static unsigned int cachepolicy __initdata = CPOLICY_WRITEBACK;
-static unsigned int ecc_mask __initdata = 0;
+static unsigned int ecc_mask __initdata;
 pgprot_t pgprot_user;
 pgprot_t pgprot_kernel;
 pgprot_t pgprot_hyp_device;
@@ -122,7 +126,7 @@
 };
 
 #ifdef CONFIG_CPU_CP15
-static unsigned long initial_pmd_value __initdata = 0;
+static unsigned long initial_pmd_value __initdata;
 
 /*
  * Initialise the cache_policy variable with the initial state specified
@@ -185,6 +189,7 @@
 
 	if (selected != cachepolicy) {
 		unsigned long cr = __clear_cr(cache_policies[selected].cr_mask);
+
 		cachepolicy = selected;
 		flush_cache_all();
 		set_cr(cr);
@@ -196,6 +201,7 @@
 static int __init early_nocache(char *__unused)
 {
 	char *p = "buffered";
+
 	pr_warn("nocache is deprecated; use cachepolicy=%s\n", p);
 	early_cachepolicy(p);
 	return 0;
@@ -205,6 +211,7 @@
 static int __init early_nowrite(char *__unused)
 {
 	char *p = "uncached";
+
 	pr_warn("nowb is deprecated; use cachepolicy=%s\n", p);
 	early_cachepolicy(p);
 	return 0;
@@ -239,9 +246,9 @@
 
 #endif /* ifdef CONFIG_CPU_CP15 / else */
 
-#define PROT_PTE_DEVICE		L_PTE_PRESENT|L_PTE_YOUNG|L_PTE_DIRTY|L_PTE_XN
+#define PROT_PTE_DEVICE		(L_PTE_PRESENT|L_PTE_YOUNG|L_PTE_DIRTY|L_PTE_XN)
 #define PROT_PTE_S2_DEVICE	PROT_PTE_DEVICE
-#define PROT_SECT_DEVICE	PMD_TYPE_SECT|PMD_SECT_AP_WRITE
+#define PROT_SECT_DEVICE	(PMD_TYPE_SECT|PMD_SECT_AP_WRITE)
 
 static struct mem_type mem_types[] = {
 	[MT_DEVICE] = {		  /* Strongly ordered / ARMv6 shared device */
@@ -653,6 +660,7 @@
 
 	for (i = 0; i < 16; i++) {
 		pteval_t v = pgprot_val(protection_map[i]);
+
 		protection_map[i] = __pgprot(v | user_pgprot);
 	}
 
@@ -690,6 +698,7 @@
 
 	for (i = 0; i < ARRAY_SIZE(mem_types); i++) {
 		struct mem_type *t = &mem_types[i];
+
 		if (t->prot_l1)
 			t->prot_l1 |= PMD_DOMAIN(t->domain);
 		if (t->prot_sect)
@@ -715,6 +724,7 @@
 static void __init *early_alloc_aligned(unsigned long sz, unsigned long align)
 {
 	void *ptr = __va(memblock_alloc(sz, align));
+
 	memset(ptr, 0, sz);
 	return ptr;
 }
@@ -728,6 +738,7 @@
 {
 	if (pmd_none(*pmd)) {
 		pte_t *pte = early_alloc(PTE_HWTABLE_OFF + PTE_HWTABLE_SIZE);
+
 		__pmd_populate(pmd, __pa(pte), prot);
 	}
 	BUG_ON(pmd_bad(*pmd));
@@ -739,6 +750,7 @@
 				  const struct mem_type *type)
 {
 	pte_t *pte = early_pte_alloc(pmd, addr, type->prot_l1);
+
 	do {
 		set_pte_ext(pte, pfn_pte(pfn, __pgprot(type->prot_pte)), 0);
 		pfn++;
@@ -1106,7 +1118,7 @@
 }
 early_param("vmalloc", early_vmalloc);
 
-phys_addr_t arm_lowmem_limit __initdata = 0;
+phys_addr_t arm_lowmem_limit __initdata;
 
 void __init sanity_check_meminfo(void)
 {
@@ -1205,13 +1217,16 @@
 	/*
 	 * Clear out all the mappings below the kernel image.
 	 */
-	for (addr = 0; addr < MODULES_VADDR; addr += PMD_SIZE)
+	for (addr = 0; addr < TASK_SIZE; addr += PMD_SIZE)
 		pmd_clear(pmd_off_k(addr));
 
 #ifdef CONFIG_XIP_KERNEL
 	/* The XIP kernel is mapped in the module area -- skip over it */
 	addr = ((unsigned long)_etext + PMD_SIZE - 1) & PMD_MASK;
 #endif
+#ifdef CONFIG_KASAN
+	addr = MODULES_VADDR;
+#endif
 	for ( ; addr < PAGE_OFFSET; addr += PMD_SIZE)
 		pmd_clear(pmd_off_k(addr));
 
@@ -1259,6 +1274,32 @@
 #endif
 }
 
+
+/* AVM MAP IO */
+#ifdef CONFIG_AVM_FASTIRQ
+#define IO_DEV(p, sz) { \
+		.virtual = (unsigned long)(IO_ADDR(p)), \
+		.pfn = __phys_to_pfn(p), \
+		.length = sz, \
+		.type = MT_DEVICE, \
+	}
+
+static struct map_desc avm_io_map[] __initdata = {
+	/* Always map EDMA IO, may be unused. */
+	   IO_DEV(0x0c080000, SZ_8K)
+#ifdef CONFIG_AVM_ICE
+	 , IO_DEV(0x0103a008, SZ_8)
+#endif
+};
+/*
+ * Map fix-mapped I/O that is needed before full MMU operation
+ */
+static void __init avm_map_io(void)
+{
+	iotable_init(avm_io_map, ARRAY_SIZE(avm_io_map));
+}
+#endif
+
 /*
  * Set up the device mappings.  Since we clear out the page tables for all
  * mappings above VMALLOC_START, except early fixmap, we might remove debug
@@ -1347,6 +1388,9 @@
 	/*
 	 * Ask the machine support to map in the statically mapped devices.
 	 */
+#ifdef CONFIG_AVM_FASTIRQ
+	avm_map_io();
+#endif
 	if (mdesc->map_io)
 		mdesc->map_io();
 	else
@@ -1593,4 +1637,5 @@
 
 	empty_zero_page = virt_to_page(zero_page);
 	__flush_dcache_page(NULL, empty_zero_page);
+	kasan_init();
 }