summaryrefslogtreecommitdiff
path: root/arch/arm64
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 02:05:52 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 02:05:52 +0300
commitf5a8160c1e055c0fd8d16a5b3ac97c638365b0db (patch)
treeca713af0131da5424cd46d25e47127bc648a9259 /arch/arm64
parent7eeef2abe87dc0d8c276f97ccfdb1f42d9d1e4d8 (diff)
parent78b9bc947b18ed16b6c2c573d774e6d54ad9452d (diff)
downloadlinux-f5a8160c1e055c0fd8d16a5b3ac97c638365b0db.tar.xz
Merge branch 'core-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI changes from Ingo Molnar: "The main changes in this cycle were: - further EFI code generalization to make it more workable for ARM64 - various extensions, such as 64-bit framebuffer address support, UEFI v2.5 EFI_PROPERTIES_TABLE support - code modularization simplifications and cleanups - new debugging parameters - various fixes and smaller additions" * 'core-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits) efi: Fix warning of int-to-pointer-cast on x86 32-bit builds efi: Use correct type for struct efi_memory_map::phys_map x86/efi: Fix kernel panic when CONFIG_DEBUG_VIRTUAL is enabled efi: Add "efi_fake_mem" boot option x86/efi: Rename print_efi_memmap() to efi_print_memmap() efi: Auto-load the efi-pstore module efi: Introduce EFI_NX_PE_DATA bit and set it from properties table efi: Add support for UEFIv2.5 Properties table efi: Add EFI_MEMORY_MORE_RELIABLE support to efi_md_typeattr_format() efifb: Add support for 64-bit frame buffer addresses efi/arm64: Clean up efi_get_fdt_params() interface arm64: Use core efi=debug instead of uefi_debug command line parameter efi/x86: Move efi=debug option parsing to core drivers/firmware: Make efi/esrt.c driver explicitly non-modular efi: Use the generic efi.memmap instead of 'memmap' acpi/apei: Use appropriate pgprot_t to map GHES memory arm64, acpi/apei: Implement arch_apei_get_mem_attributes() arm64/mm: Add PROT_DEVICE_nGnRnE and PROT_NORMAL_WT acpi, x86: Implement arch_apei_get_mem_attributes() efi, x86: Rearrange efi_mem_attributes() ...
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/include/asm/acpi.h5
-rw-r--r--arch/arm64/include/asm/memory.h1
-rw-r--r--arch/arm64/include/asm/pgtable.h2
-rw-r--r--arch/arm64/kernel/acpi.c29
-rw-r--r--arch/arm64/kernel/efi.c23
-rw-r--r--arch/arm64/mm/proc.S4
6 files changed, 47 insertions, 17 deletions
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
index 208cec08a74f..5f8a38dee274 100644
--- a/arch/arm64/include/asm/acpi.h
+++ b/arch/arm64/include/asm/acpi.h
@@ -92,4 +92,9 @@ static inline const char *acpi_get_enable_method(int cpu)
{
return acpi_psci_present() ? "psci" : NULL;
}
+
+#ifdef CONFIG_ACPI_APEI
+pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
+#endif
+
#endif /*_ASM_ACPI_H*/
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 6b4c3ad75a2a..67027c611dbd 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -94,6 +94,7 @@
#define MT_DEVICE_GRE 2
#define MT_NORMAL_NC 3
#define MT_NORMAL 4
+#define MT_NORMAL_WT 5
/*
* Memory types for Stage-2 translation
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 26b066690593..571ca0ed4f05 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -60,8 +60,10 @@ extern void __pgd_error(const char *file, int line, unsigned long val);
#define PROT_DEFAULT (PTE_TYPE_PAGE | PTE_AF | PTE_SHARED)
#define PROT_SECT_DEFAULT (PMD_TYPE_SECT | PMD_SECT_AF | PMD_SECT_S)
+#define PROT_DEVICE_nGnRnE (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_ATTRINDX(MT_DEVICE_nGnRnE))
#define PROT_DEVICE_nGnRE (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_ATTRINDX(MT_DEVICE_nGnRE))
#define PROT_NORMAL_NC (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_ATTRINDX(MT_NORMAL_NC))
+#define PROT_NORMAL_WT (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_ATTRINDX(MT_NORMAL_WT))
#define PROT_NORMAL (PROT_DEFAULT | PTE_PXN | PTE_UXN | PTE_ATTRINDX(MT_NORMAL))
#define PROT_SECT_DEVICE_nGnRE (PROT_SECT_DEFAULT | PMD_SECT_PXN | PMD_SECT_UXN | PMD_ATTRINDX(MT_DEVICE_nGnRE))
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
index 19de7537e7d3..137d537ddceb 100644
--- a/arch/arm64/kernel/acpi.c
+++ b/arch/arm64/kernel/acpi.c
@@ -29,6 +29,11 @@
#include <asm/cpu_ops.h>
#include <asm/smp_plat.h>
+#ifdef CONFIG_ACPI_APEI
+# include <linux/efi.h>
+# include <asm/pgtable.h>
+#endif
+
int acpi_noirq = 1; /* skip ACPI IRQ initialization */
int acpi_disabled = 1;
EXPORT_SYMBOL(acpi_disabled);
@@ -230,3 +235,27 @@ void __init acpi_gic_init(void)
early_acpi_os_unmap_memory((char *)table, tbl_size);
}
+
+#ifdef CONFIG_ACPI_APEI
+pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
+{
+ /*
+ * According to "Table 8 Map: EFI memory types to AArch64 memory
+ * types" of UEFI 2.5 section 2.3.6.1, each EFI memory type is
+ * mapped to a corresponding MAIR attribute encoding.
+ * The EFI memory attribute advises all possible capabilities
+ * of a memory region. We use the most efficient capability.
+ */
+
+ u64 attr;
+
+ attr = efi_mem_attributes(addr);
+ if (attr & EFI_MEMORY_WB)
+ return PAGE_KERNEL;
+ if (attr & EFI_MEMORY_WT)
+ return __pgprot(PROT_NORMAL_WT);
+ if (attr & EFI_MEMORY_WC)
+ return __pgprot(PROT_NORMAL_NC);
+ return __pgprot(PROT_DEVICE_nGnRnE);
+}
+#endif
diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index 13671a9cf016..61eb1d17586a 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -51,15 +51,6 @@ static struct mm_struct efi_mm = {
INIT_MM_CONTEXT(efi_mm)
};
-static int uefi_debug __initdata;
-static int __init uefi_debug_setup(char *str)
-{
- uefi_debug = 1;
-
- return 0;
-}
-early_param("uefi_debug", uefi_debug_setup);
-
static int __init is_normal_ram(efi_memory_desc_t *md)
{
if (md->attribute & EFI_MEMORY_WB)
@@ -171,14 +162,14 @@ static __init void reserve_regions(void)
efi_memory_desc_t *md;
u64 paddr, npages, size;
- if (uefi_debug)
+ if (efi_enabled(EFI_DBG))
pr_info("Processing EFI memory map:\n");
for_each_efi_memory_desc(&memmap, md) {
paddr = md->phys_addr;
npages = md->num_pages;
- if (uefi_debug) {
+ if (efi_enabled(EFI_DBG)) {
char buf[64];
pr_info(" 0x%012llx-0x%012llx %s",
@@ -194,11 +185,11 @@ static __init void reserve_regions(void)
if (is_reserve_region(md)) {
memblock_reserve(paddr, size);
- if (uefi_debug)
+ if (efi_enabled(EFI_DBG))
pr_cont("*");
}
- if (uefi_debug)
+ if (efi_enabled(EFI_DBG))
pr_cont("\n");
}
@@ -210,14 +201,14 @@ void __init efi_init(void)
struct efi_fdt_params params;
/* Grab UEFI information placed in FDT by stub */
- if (!efi_get_fdt_params(&params, uefi_debug))
+ if (!efi_get_fdt_params(&params))
return;
efi_system_table = params.system_table;
memblock_reserve(params.mmap & PAGE_MASK,
PAGE_ALIGN(params.mmap_size + (params.mmap & ~PAGE_MASK)));
- memmap.phys_map = (void *)params.mmap;
+ memmap.phys_map = params.mmap;
memmap.map = early_memremap(params.mmap, params.mmap_size);
memmap.map_end = memmap.map + params.mmap_size;
memmap.desc_size = params.desc_size;
@@ -291,7 +282,7 @@ static int __init arm64_enable_runtime_services(void)
pr_info("Remapping and enabling EFI services.\n");
mapsize = memmap.map_end - memmap.map;
- memmap.map = (__force void *)ioremap_cache((phys_addr_t)memmap.phys_map,
+ memmap.map = (__force void *)ioremap_cache(memmap.phys_map,
mapsize);
if (!memmap.map) {
pr_err("Failed to remap EFI memory map\n");
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index e4ee7bd8830a..7783ff05f74c 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -163,12 +163,14 @@ ENTRY(__cpu_setup)
* DEVICE_GRE 010 00001100
* NORMAL_NC 011 01000100
* NORMAL 100 11111111
+ * NORMAL_WT 101 10111011
*/
ldr x5, =MAIR(0x00, MT_DEVICE_nGnRnE) | \
MAIR(0x04, MT_DEVICE_nGnRE) | \
MAIR(0x0c, MT_DEVICE_GRE) | \
MAIR(0x44, MT_NORMAL_NC) | \
- MAIR(0xff, MT_NORMAL)
+ MAIR(0xff, MT_NORMAL) | \
+ MAIR(0xbb, MT_NORMAL_WT)
msr mair_el1, x5
/*
* Prepare SCTLR