Merge branch 'for-rmk/virt/kvm/core' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable

2 files changed, 66 insertions, 11 deletions

diff --git a/arch/arm/mm/idmap.c b/arch/arm/mm/idmap.c
index 99db769307e..2dffc010cc4 100644
--- a/arch/arm/mm/idmap.c
+++ b/arch/arm/mm/idmap.c
@@ -1,4 +1,6 @@
+#include <linux/module.h>
 #include <linux/kernel.h>
+#include <linux/slab.h>
 
 #include <asm/cputype.h>
 #include <asm/idmap.h>
@@ -6,6 +8,7 @@
 #include <asm/pgtable.h>
 #include <asm/sections.h>
 #include <asm/system_info.h>
+#include <asm/virt.h>
 
 pgd_t *idmap_pgd;
 
@@ -59,11 +62,17 @@ static void idmap_add_pud(pgd_t *pgd, unsigned long addr, unsigned long end,
 	} while (pud++, addr = next, addr != end);
 }
 
-static void identity_mapping_add(pgd_t *pgd, unsigned long addr, unsigned long end)
+static void identity_mapping_add(pgd_t *pgd, const char *text_start,
+				 const char *text_end, unsigned long prot)
 {
-	unsigned long prot, next;
+	unsigned long addr, end;
+	unsigned long next;
+
+	addr = virt_to_phys(text_start);
+	end = virt_to_phys(text_end);
+
+	prot |= PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AF;
 
-	prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_SECT_AF;
 	if (cpu_architecture() <= CPU_ARCH_ARMv5TEJ && !cpu_is_xscale())
 		prot |= PMD_BIT4;
 
@@ -74,28 +83,52 @@ static void identity_mapping_add(pgd_t *pgd, unsigned long addr, unsigned long e
 	} while (pgd++, addr = next, addr != end);
 }
 
+#if defined(CONFIG_ARM_VIRT_EXT) && defined(CONFIG_ARM_LPAE)
+pgd_t *hyp_pgd;
+
+extern char  __hyp_idmap_text_start[], __hyp_idmap_text_end[];
+
+static int __init init_static_idmap_hyp(void)
+{
+	hyp_pgd = kzalloc(PTRS_PER_PGD * sizeof(pgd_t), GFP_KERNEL);
+	if (!hyp_pgd)
+		return -ENOMEM;
+
+	pr_info("Setting up static HYP identity map for 0x%p - 0x%p\n",
+		__hyp_idmap_text_start, __hyp_idmap_text_end);
+	identity_mapping_add(hyp_pgd, __hyp_idmap_text_start,
+			     __hyp_idmap_text_end, PMD_SECT_AP1);
+
+	return 0;
+}
+#else
+static int __init init_static_idmap_hyp(void)
+{
+	return 0;
+}
+#endif
+
 extern char  __idmap_text_start[], __idmap_text_end[];
 
 static int __init init_static_idmap(void)
 {
-	phys_addr_t idmap_start, idmap_end;
+	int ret;
 
 	idmap_pgd = pgd_alloc(&init_mm);
 	if (!idmap_pgd)
 		return -ENOMEM;
 
-	/* Add an identity mapping for the physical address of the section. */
-	idmap_start = virt_to_phys((void *)__idmap_text_start);
-	idmap_end = virt_to_phys((void *)__idmap_text_end);
+	pr_info("Setting up static identity map for 0x%p - 0x%p\n",
+		__idmap_text_start, __idmap_text_end);
+	identity_mapping_add(idmap_pgd, __idmap_text_start,
+			     __idmap_text_end, 0);
 
-	pr_info("Setting up static identity map for 0x%llx - 0x%llx\n",
-		(long long)idmap_start, (long long)idmap_end);
-	identity_mapping_add(idmap_pgd, idmap_start, idmap_end);
+	ret = init_static_idmap_hyp();
 
 	/* Flush L1 for the hardware to see this page table content */
 	flush_cache_louis();
 
-	return 0;
+	return ret;
 }
 early_initcall(init_static_idmap);
 
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 9f0610243bd..1f51d712b55 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -57,6 +57,9 @@ static unsigned int cachepolicy __initdata = CPOLICY_WRITEBACK;
 static unsigned int ecc_mask __initdata = 0;
 pgprot_t pgprot_user;
 pgprot_t pgprot_kernel;
+pgprot_t pgprot_hyp_device;
+pgprot_t pgprot_s2;
+pgprot_t pgprot_s2_device;
 
 EXPORT_SYMBOL(pgprot_user);
 EXPORT_SYMBOL(pgprot_kernel);
@@ -66,34 +69,46 @@ struct cachepolicy {
 	unsigned int	cr_mask;
 	pmdval_t	pmd;
 	pteval_t	pte;
+	pteval_t	pte_s2;
 };
 
+#ifdef CONFIG_ARM_LPAE
+#define s2_policy(policy)	policy
+#else
+#define s2_policy(policy)	0
+#endif
+
 static struct cachepolicy cache_policies[] __initdata = {
 	{
 		.policy		= "uncached",
 		.cr_mask	= CR_W|CR_C,
 		.pmd		= PMD_SECT_UNCACHED,
 		.pte		= L_PTE_MT_UNCACHED,
+		.pte_s2		= s2_policy(L_PTE_S2_MT_UNCACHED),
 	}, {
 		.policy		= "buffered",
 		.cr_mask	= CR_C,
 		.pmd		= PMD_SECT_BUFFERED,
 		.pte		= L_PTE_MT_BUFFERABLE,
+		.pte_s2		= s2_policy(L_PTE_S2_MT_UNCACHED),
 	}, {
 		.policy		= "writethrough",
 		.cr_mask	= 0,
 		.pmd		= PMD_SECT_WT,
 		.pte		= L_PTE_MT_WRITETHROUGH,
+		.pte_s2		= s2_policy(L_PTE_S2_MT_WRITETHROUGH),
 	}, {
 		.policy		= "writeback",
 		.cr_mask	= 0,
 		.pmd		= PMD_SECT_WB,
 		.pte		= L_PTE_MT_WRITEBACK,
+		.pte_s2		= s2_policy(L_PTE_S2_MT_WRITEBACK),
 	}, {
 		.policy		= "writealloc",
 		.cr_mask	= 0,
 		.pmd		= PMD_SECT_WBWA,
 		.pte		= L_PTE_MT_WRITEALLOC,
+		.pte_s2		= s2_policy(L_PTE_S2_MT_WRITEBACK),
 	}
 };
 
@@ -310,6 +325,7 @@ static void __init build_mem_type_table(void)
 	struct cachepolicy *cp;
 	unsigned int cr = get_cr();
 	pteval_t user_pgprot, kern_pgprot, vecs_pgprot;
+	pteval_t hyp_device_pgprot, s2_pgprot, s2_device_pgprot;
 	int cpu_arch = cpu_architecture();
 	int i;
 
@@ -421,6 +437,8 @@ static void __init build_mem_type_table(void)
 	 */
 	cp = &cache_policies[cachepolicy];
 	vecs_pgprot = kern_pgprot = user_pgprot = cp->pte;
+	s2_pgprot = cp->pte_s2;
+	hyp_device_pgprot = s2_device_pgprot = mem_types[MT_DEVICE].prot_pte;
 
 	/*
 	 * ARMv6 and above have extended page tables.
@@ -444,6 +462,7 @@ static void __init build_mem_type_table(void)
 			user_pgprot |= L_PTE_SHARED;
 			kern_pgprot |= L_PTE_SHARED;
 			vecs_pgprot |= L_PTE_SHARED;
+			s2_pgprot |= L_PTE_SHARED;
 			mem_types[MT_DEVICE_WC].prot_sect |= PMD_SECT_S;
 			mem_types[MT_DEVICE_WC].prot_pte |= L_PTE_SHARED;
 			mem_types[MT_DEVICE_CACHED].prot_sect |= PMD_SECT_S;
@@ -498,6 +517,9 @@ static void __init build_mem_type_table(void)
 	pgprot_user   = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | user_pgprot);
 	pgprot_kernel = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG |
 				 L_PTE_DIRTY | kern_pgprot);
+	pgprot_s2  = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | s2_pgprot);
+	pgprot_s2_device  = __pgprot(s2_device_pgprot);
+	pgprot_hyp_device  = __pgprot(hyp_device_pgprot);
 
 	mem_types[MT_LOW_VECTORS].prot_l1 |= ecc_mask;
 	mem_types[MT_HIGH_VECTORS].prot_l1 |= ecc_mask;