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-rw-r--r--arch/x86/include/asm/efi.h2
-rw-r--r--arch/x86/kernel/setup.c10
-rw-r--r--arch/x86/platform/efi/efi.c377
3 files changed, 279 insertions, 110 deletions
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 844f735fd63..c9dcc181d4d 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -95,7 +95,7 @@ extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
extern int add_efi_memmap;
extern void efi_set_executable(efi_memory_desc_t *md, bool executable);
-extern void efi_memblock_x86_reserve_range(void);
+extern int efi_memblock_x86_reserve_range(void);
extern void efi_call_phys_prelog(void);
extern void efi_call_phys_epilog(void);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index d7d5099fe87..88638883176 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -749,10 +749,16 @@ void __init setup_arch(char **cmdline_p)
#endif
#ifdef CONFIG_EFI
if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
- EFI_LOADER_SIGNATURE, 4)) {
+ "EL32", 4)) {
efi_enabled = 1;
- efi_memblock_x86_reserve_range();
+ efi_64bit = false;
+ } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
+ "EL64", 4)) {
+ efi_enabled = 1;
+ efi_64bit = true;
}
+ if (efi_enabled && efi_memblock_x86_reserve_range())
+ efi_enabled = 0;
#endif
x86_init.oem.arch_setup();
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 4cf9bd0a165..92660edaa1e 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -26,6 +26,8 @@
* Skip non-WB memory and ignore empty memory ranges.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/efi.h>
@@ -47,7 +49,6 @@
#include <asm/x86_init.h>
#define EFI_DEBUG 1
-#define PFX "EFI: "
int efi_enabled;
EXPORT_SYMBOL(efi_enabled);
@@ -67,6 +68,9 @@ EXPORT_SYMBOL(efi);
struct efi_memory_map memmap;
+bool efi_64bit;
+static bool efi_native;
+
static struct efi efi_phys __initdata;
static efi_system_table_t efi_systab __initdata;
@@ -254,7 +258,7 @@ int efi_set_rtc_mmss(unsigned long nowtime)
status = efi.get_time(&eft, &cap);
if (status != EFI_SUCCESS) {
- printk(KERN_ERR "Oops: efitime: can't read time!\n");
+ pr_err("Oops: efitime: can't read time!\n");
return -1;
}
@@ -268,7 +272,7 @@ int efi_set_rtc_mmss(unsigned long nowtime)
status = efi.set_time(&eft);
if (status != EFI_SUCCESS) {
- printk(KERN_ERR "Oops: efitime: can't write time!\n");
+ pr_err("Oops: efitime: can't write time!\n");
return -1;
}
return 0;
@@ -282,7 +286,7 @@ unsigned long efi_get_time(void)
status = efi.get_time(&eft, &cap);
if (status != EFI_SUCCESS)
- printk(KERN_ERR "Oops: efitime: can't read time!\n");
+ pr_err("Oops: efitime: can't read time!\n");
return mktime(eft.year, eft.month, eft.day, eft.hour,
eft.minute, eft.second);
@@ -338,11 +342,16 @@ static void __init do_add_efi_memmap(void)
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
}
-void __init efi_memblock_x86_reserve_range(void)
+int __init efi_memblock_x86_reserve_range(void)
{
unsigned long pmap;
#ifdef CONFIG_X86_32
+ /* Can't handle data above 4GB at this time */
+ if (boot_params.efi_info.efi_memmap_hi) {
+ pr_err("Memory map is above 4GB, disabling EFI.\n");
+ return -EINVAL;
+ }
pmap = boot_params.efi_info.efi_memmap;
#else
pmap = (boot_params.efi_info.efi_memmap |
@@ -354,6 +363,8 @@ void __init efi_memblock_x86_reserve_range(void)
memmap.desc_version = boot_params.efi_info.efi_memdesc_version;
memmap.desc_size = boot_params.efi_info.efi_memdesc_size;
memblock_reserve(pmap, memmap.nr_map * memmap.desc_size);
+
+ return 0;
}
#if EFI_DEBUG
@@ -367,7 +378,7 @@ static void __init print_efi_memmap(void)
p < memmap.map_end;
p += memmap.desc_size, i++) {
md = p;
- printk(KERN_INFO PFX "mem%02u: type=%u, attr=0x%llx, "
+ pr_info("mem%02u: type=%u, attr=0x%llx, "
"range=[0x%016llx-0x%016llx) (%lluMB)\n",
i, md->type, md->attribute, md->phys_addr,
md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
@@ -400,7 +411,7 @@ void __init efi_reserve_boot_services(void)
memblock_is_region_reserved(start, size)) {
/* Could not reserve, skip it */
md->num_pages = 0;
- memblock_dbg(PFX "Could not reserve boot range "
+ memblock_dbg("Could not reserve boot range "
"[0x%010llx-0x%010llx]\n",
start, start+size-1);
} else
@@ -429,103 +440,172 @@ static void __init efi_free_boot_services(void)
}
}
-void __init efi_init(void)
+static int __init efi_systab_init(void *phys)
{
- efi_config_table_t *config_tables;
- efi_runtime_services_t *runtime;
- efi_char16_t *c16;
- char vendor[100] = "unknown";
- int i = 0;
- void *tmp;
+ if (efi_64bit) {
+ efi_system_table_64_t *systab64;
+ u64 tmp = 0;
+
+ systab64 = early_ioremap((unsigned long)phys,
+ sizeof(*systab64));
+ if (systab64 == NULL) {
+ pr_err("Couldn't map the system table!\n");
+ return -ENOMEM;
+ }
+ efi_systab.hdr = systab64->hdr;
+ efi_systab.fw_vendor = systab64->fw_vendor;
+ tmp |= systab64->fw_vendor;
+ efi_systab.fw_revision = systab64->fw_revision;
+ efi_systab.con_in_handle = systab64->con_in_handle;
+ tmp |= systab64->con_in_handle;
+ efi_systab.con_in = systab64->con_in;
+ tmp |= systab64->con_in;
+ efi_systab.con_out_handle = systab64->con_out_handle;
+ tmp |= systab64->con_out_handle;
+ efi_systab.con_out = systab64->con_out;
+ tmp |= systab64->con_out;
+ efi_systab.stderr_handle = systab64->stderr_handle;
+ tmp |= systab64->stderr_handle;
+ efi_systab.stderr = systab64->stderr;
+ tmp |= systab64->stderr;
+ efi_systab.runtime = (void *)(unsigned long)systab64->runtime;
+ tmp |= systab64->runtime;
+ efi_systab.boottime = (void *)(unsigned long)systab64->boottime;
+ tmp |= systab64->boottime;
+ efi_systab.nr_tables = systab64->nr_tables;
+ efi_systab.tables = systab64->tables;
+ tmp |= systab64->tables;
+
+ early_iounmap(systab64, sizeof(*systab64));
#ifdef CONFIG_X86_32
- efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab;
-#else
- efi_phys.systab = (efi_system_table_t *)
- (boot_params.efi_info.efi_systab |
- ((__u64)boot_params.efi_info.efi_systab_hi<<32));
+ if (tmp >> 32) {
+ pr_err("EFI data located above 4GB, disabling EFI.\n");
+ return -EINVAL;
+ }
#endif
+ } else {
+ efi_system_table_32_t *systab32;
+
+ systab32 = early_ioremap((unsigned long)phys,
+ sizeof(*systab32));
+ if (systab32 == NULL) {
+ pr_err("Couldn't map the system table!\n");
+ return -ENOMEM;
+ }
+
+ efi_systab.hdr = systab32->hdr;
+ efi_systab.fw_vendor = systab32->fw_vendor;
+ efi_systab.fw_revision = systab32->fw_revision;
+ efi_systab.con_in_handle = systab32->con_in_handle;
+ efi_systab.con_in = systab32->con_in;
+ efi_systab.con_out_handle = systab32->con_out_handle;
+ efi_systab.con_out = systab32->con_out;
+ efi_systab.stderr_handle = systab32->stderr_handle;
+ efi_systab.stderr = systab32->stderr;
+ efi_systab.runtime = (void *)(unsigned long)systab32->runtime;
+ efi_systab.boottime = (void *)(unsigned long)systab32->boottime;
+ efi_systab.nr_tables = systab32->nr_tables;
+ efi_systab.tables = systab32->tables;
+
+ early_iounmap(systab32, sizeof(*systab32));
+ }
- efi.systab = early_ioremap((unsigned long)efi_phys.systab,
- sizeof(efi_system_table_t));
- if (efi.systab == NULL)
- printk(KERN_ERR "Couldn't map the EFI system table!\n");
- memcpy(&efi_systab, efi.systab, sizeof(efi_system_table_t));
- early_iounmap(efi.systab, sizeof(efi_system_table_t));
efi.systab = &efi_systab;
/*
* Verify the EFI Table
*/
- if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
- printk(KERN_ERR "EFI system table signature incorrect!\n");
+ if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) {
+ pr_err("System table signature incorrect!\n");
+ return -EINVAL;
+ }
if ((efi.systab->hdr.revision >> 16) == 0)
- printk(KERN_ERR "Warning: EFI system table version "
+ pr_err("Warning: System table version "
"%d.%02d, expected 1.00 or greater!\n",
efi.systab->hdr.revision >> 16,
efi.systab->hdr.revision & 0xffff);
- /*
- * Show what we know for posterity
- */
- c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2);
- if (c16) {
- for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i)
- vendor[i] = *c16++;
- vendor[i] = '\0';
- } else
- printk(KERN_ERR PFX "Could not map the firmware vendor!\n");
- early_iounmap(tmp, 2);
+ return 0;
+}
- printk(KERN_INFO "EFI v%u.%.02u by %s\n",
- efi.systab->hdr.revision >> 16,
- efi.systab->hdr.revision & 0xffff, vendor);
+static int __init efi_config_init(u64 tables, int nr_tables)
+{
+ void *config_tables, *tablep;
+ int i, sz;
+
+ if (efi_64bit)
+ sz = sizeof(efi_config_table_64_t);
+ else
+ sz = sizeof(efi_config_table_32_t);
/*
* Let's see what config tables the firmware passed to us.
*/
- config_tables = early_ioremap(
- efi.systab->tables,
- efi.systab->nr_tables * sizeof(efi_config_table_t));
- if (config_tables == NULL)
- printk(KERN_ERR "Could not map EFI Configuration Table!\n");
+ config_tables = early_ioremap(tables, nr_tables * sz);
+ if (config_tables == NULL) {
+ pr_err("Could not map Configuration table!\n");
+ return -ENOMEM;
+ }
- printk(KERN_INFO);
+ tablep = config_tables;
+ pr_info("");
for (i = 0; i < efi.systab->nr_tables; i++) {
- if (!efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID)) {
- efi.mps = config_tables[i].table;
- printk(" MPS=0x%lx ", config_tables[i].table);
- } else if (!efi_guidcmp(config_tables[i].guid,
- ACPI_20_TABLE_GUID)) {
- efi.acpi20 = config_tables[i].table;
- printk(" ACPI 2.0=0x%lx ", config_tables[i].table);
- } else if (!efi_guidcmp(config_tables[i].guid,
- ACPI_TABLE_GUID)) {
- efi.acpi = config_tables[i].table;
- printk(" ACPI=0x%lx ", config_tables[i].table);
- } else if (!efi_guidcmp(config_tables[i].guid,
- SMBIOS_TABLE_GUID)) {
- efi.smbios = config_tables[i].table;
- printk(" SMBIOS=0x%lx ", config_tables[i].table);
+ efi_guid_t guid;
+ unsigned long table;
+
+ if (efi_64bit) {
+ u64 table64;
+ guid = ((efi_config_table_64_t *)tablep)->guid;
+ table64 = ((efi_config_table_64_t *)tablep)->table;
+ table = table64;
+#ifdef CONFIG_X86_32
+ if (table64 >> 32) {
+ pr_cont("\n");
+ pr_err("Table located above 4GB, disabling EFI.\n");
+ early_iounmap(config_tables,
+ efi.systab->nr_tables * sz);
+ return -EINVAL;
+ }
+#endif
+ } else {
+ guid = ((efi_config_table_32_t *)tablep)->guid;
+ table = ((efi_config_table_32_t *)tablep)->table;
+ }
+ if (!efi_guidcmp(guid, MPS_TABLE_GUID)) {
+ efi.mps = table;
+ pr_cont(" MPS=0x%lx ", table);
+ } else if (!efi_guidcmp(guid, ACPI_20_TABLE_GUID)) {
+ efi.acpi20 = table;
+ pr_cont(" ACPI 2.0=0x%lx ", table);
+ } else if (!efi_guidcmp(guid, ACPI_TABLE_GUID)) {
+ efi.acpi = table;
+ pr_cont(" ACPI=0x%lx ", table);
+ } else if (!efi_guidcmp(guid, SMBIOS_TABLE_GUID)) {
+ efi.smbios = table;
+ pr_cont(" SMBIOS=0x%lx ", table);
#ifdef CONFIG_X86_UV
- } else if (!efi_guidcmp(config_tables[i].guid,
- UV_SYSTEM_TABLE_GUID)) {
- efi.uv_systab = config_tables[i].table;
- printk(" UVsystab=0x%lx ", config_tables[i].table);
+ } else if (!efi_guidcmp(guid, UV_SYSTEM_TABLE_GUID)) {
+ efi.uv_systab = table;
+ pr_cont(" UVsystab=0x%lx ", table);
#endif
- } else if (!efi_guidcmp(config_tables[i].guid,
- HCDP_TABLE_GUID)) {
- efi.hcdp = config_tables[i].table;
- printk(" HCDP=0x%lx ", config_tables[i].table);
- } else if (!efi_guidcmp(config_tables[i].guid,
- UGA_IO_PROTOCOL_GUID)) {
- efi.uga = config_tables[i].table;
- printk(" UGA=0x%lx ", config_tables[i].table);
+ } else if (!efi_guidcmp(guid, HCDP_TABLE_GUID)) {
+ efi.hcdp = table;
+ pr_cont(" HCDP=0x%lx ", table);
+ } else if (!efi_guidcmp(guid, UGA_IO_PROTOCOL_GUID)) {
+ efi.uga = table;
+ pr_cont(" UGA=0x%lx ", table);
}
+ tablep += sz;
}
- printk("\n");
- early_iounmap(config_tables,
- efi.systab->nr_tables * sizeof(efi_config_table_t));
+ pr_cont("\n");
+ early_iounmap(config_tables, efi.systab->nr_tables * sz);
+ return 0;
+}
+
+static int __init efi_runtime_init(void)
+{
+ efi_runtime_services_t *runtime;
/*
* Check out the runtime services table. We need to map
@@ -535,43 +615,116 @@ void __init efi_init(void)
*/
runtime = early_ioremap((unsigned long)efi.systab->runtime,
sizeof(efi_runtime_services_t));
- if (runtime != NULL) {
- /*
- * We will only need *early* access to the following
- * two EFI runtime services before set_virtual_address_map
- * is invoked.
- */
- efi_phys.get_time = (efi_get_time_t *)runtime->get_time;
- efi_phys.set_virtual_address_map =
- (efi_set_virtual_address_map_t *)
- runtime->set_virtual_address_map;
- /*
- * Make efi_get_time can be called before entering
- * virtual mode.
- */
- efi.get_time = phys_efi_get_time;
- } else
- printk(KERN_ERR "Could not map the EFI runtime service "
- "table!\n");
+ if (!runtime) {
+ pr_err("Could not map the runtime service table!\n");
+ return -ENOMEM;
+ }
+ /*
+ * We will only need *early* access to the following
+ * two EFI runtime services before set_virtual_address_map
+ * is invoked.
+ */
+ efi_phys.get_time = (efi_get_time_t *)runtime->get_time;
+ efi_phys.set_virtual_address_map =
+ (efi_set_virtual_address_map_t *)
+ runtime->set_virtual_address_map;
+ /*
+ * Make efi_get_time can be called before entering
+ * virtual mode.
+ */
+ efi.get_time = phys_efi_get_time;
early_iounmap(runtime, sizeof(efi_runtime_services_t));
+ return 0;
+}
+
+static int __init efi_memmap_init(void)
+{
/* Map the EFI memory map */
memmap.map = early_ioremap((unsigned long)memmap.phys_map,
memmap.nr_map * memmap.desc_size);
- if (memmap.map == NULL)
- printk(KERN_ERR "Could not map the EFI memory map!\n");
+ if (memmap.map == NULL) {
+ pr_err("Could not map the memory map!\n");
+ return -ENOMEM;
+ }
memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
- if (memmap.desc_size != sizeof(efi_memory_desc_t))
- printk(KERN_WARNING
- "Kernel-defined memdesc doesn't match the one from EFI!\n");
-
if (add_efi_memmap)
do_add_efi_memmap();
+ return 0;
+}
+
+void __init efi_init(void)
+{
+ efi_char16_t *c16;
+ char vendor[100] = "unknown";
+ int i = 0;
+ void *tmp;
+
+#ifdef CONFIG_X86_32
+ if (boot_params.efi_info.efi_systab_hi ||
+ boot_params.efi_info.efi_memmap_hi) {
+ pr_info("Table located above 4GB, disabling EFI.\n");
+ efi_enabled = 0;
+ return;
+ }
+ efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab;
+ efi_native = !efi_64bit;
+#else
+ efi_phys.systab = (efi_system_table_t *)
+ (boot_params.efi_info.efi_systab |
+ ((__u64)boot_params.efi_info.efi_systab_hi<<32));
+ efi_native = efi_64bit;
+#endif
+
+ if (efi_systab_init(efi_phys.systab)) {
+ efi_enabled = 0;
+ return;
+ }
+
+ /*
+ * Show what we know for posterity
+ */
+ c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2);
+ if (c16) {
+ for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i)
+ vendor[i] = *c16++;
+ vendor[i] = '\0';
+ } else
+ pr_err("Could not map the firmware vendor!\n");
+ early_iounmap(tmp, 2);
+
+ pr_info("EFI v%u.%.02u by %s\n",
+ efi.systab->hdr.revision >> 16,
+ efi.systab->hdr.revision & 0xffff, vendor);
+
+ if (efi_config_init(efi.systab->tables, efi.systab->nr_tables)) {
+ efi_enabled = 0;
+ return;
+ }
+
+ /*
+ * Note: We currently don't support runtime services on an EFI
+ * that doesn't match the kernel 32/64-bit mode.
+ */
+
+ if (!efi_native)
+ pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n");
+ else if (efi_runtime_init()) {
+ efi_enabled = 0;
+ return;
+ }
+
+ if (efi_memmap_init()) {
+ efi_enabled = 0;
+ return;
+ }
#ifdef CONFIG_X86_32
- x86_platform.get_wallclock = efi_get_time;
- x86_platform.set_wallclock = efi_set_rtc_mmss;
+ if (efi_native) {
+ x86_platform.get_wallclock = efi_get_time;
+ x86_platform.set_wallclock = efi_set_rtc_mmss;
+ }
#endif
#if EFI_DEBUG
@@ -629,6 +782,14 @@ void __init efi_enter_virtual_mode(void)
efi.systab = NULL;
+ /*
+ * We don't do virtual mode, since we don't do runtime services, on
+ * non-native EFI
+ */
+
+ if (!efi_native)
+ goto out;
+
/* Merge contiguous regions of the same type and attribute */
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
u64 prev_size;
@@ -677,7 +838,7 @@ void __init efi_enter_virtual_mode(void)
md->virt_addr = (u64) (unsigned long) va;
if (!va) {
- printk(KERN_ERR PFX "ioremap of 0x%llX failed!\n",
+ pr_err("ioremap of 0x%llX failed!\n",
(unsigned long long)md->phys_addr);
continue;
}
@@ -711,8 +872,8 @@ void __init efi_enter_virtual_mode(void)
(efi_memory_desc_t *)__pa(new_memmap));
if (status != EFI_SUCCESS) {
- printk(KERN_ALERT "Unable to switch EFI into virtual mode "
- "(status=%lx)!\n", status);
+ pr_alert("Unable to switch EFI into virtual mode "
+ "(status=%lx)!\n", status);
panic("EFI call to SetVirtualAddressMap() failed!");
}
@@ -744,6 +905,8 @@ void __init efi_enter_virtual_mode(void)
efi.query_capsule_caps = virt_efi_query_capsule_caps;
if (__supported_pte_mask & _PAGE_NX)
runtime_code_page_mkexec();
+
+out:
early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
memmap.map = NULL;
kfree(new_memmap);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-24 13:40:11 +0000