static void *efi_runtime_map;
static int nr_efi_runtime_map;
+u64 efi_setup; /* efi setup_data physical address */
+u32 efi_data_len; /* efi setup_data payload length */
/*
* Returns 1 if 'facility' is enabled, 0 otherwise.
}
early_param("efi_no_storage_paranoia", setup_storage_paranoia);
-
static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
{
unsigned long flags;
{
if (efi_enabled(EFI_64BIT)) {
efi_system_table_64_t *systab64;
+ struct efi_setup_data *data = NULL;
u64 tmp = 0;
+ if (efi_setup) {
+ data = early_memremap(efi_setup, sizeof(*data));
+ if (!data)
+ return -ENOMEM;
+ }
systab64 = early_ioremap((unsigned long)phys,
sizeof(*systab64));
if (systab64 == NULL) {
pr_err("Couldn't map the system table!\n");
+ if (data)
+ early_iounmap(data, sizeof(*data));
return -ENOMEM;
}
efi_systab.hdr = systab64->hdr;
- efi_systab.fw_vendor = systab64->fw_vendor;
- tmp |= systab64->fw_vendor;
+ efi_systab.fw_vendor = data ? (unsigned long)data->fw_vendor :
+ systab64->fw_vendor;
+ tmp |= data ? data->fw_vendor : systab64->fw_vendor;
efi_systab.fw_revision = systab64->fw_revision;
efi_systab.con_in_handle = systab64->con_in_handle;
tmp |= systab64->con_in_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.runtime = data ?
+ (void *)(unsigned long)data->runtime :
+ (void *)(unsigned long)systab64->runtime;
+ tmp |= data ? data->runtime : 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;
+ efi_systab.tables = data ? (unsigned long)data->tables :
+ systab64->tables;
+ tmp |= data ? data->tables : systab64->tables;
early_iounmap(systab64, sizeof(*systab64));
+ if (data)
+ early_iounmap(data, sizeof(*data));
#ifdef CONFIG_X86_32
if (tmp >> 32) {
pr_err("EFI data located above 4GB, disabling EFI.\n");
return 0;
}
+/*
+ * A number of config table entries get remapped to virtual addresses
+ * after entering EFI virtual mode. However, the kexec kernel requires
+ * their physical addresses therefore we pass them via setup_data and
+ * correct those entries to their respective physical addresses here.
+ *
+ * Currently only handles smbios which is necessary for some firmware
+ * implementation.
+ */
+static int __init efi_reuse_config(u64 tables, int nr_tables)
+{
+ int i, sz, ret = 0;
+ void *p, *tablep;
+ struct efi_setup_data *data;
+
+ if (!efi_setup)
+ return 0;
+
+ if (!efi_enabled(EFI_64BIT))
+ return 0;
+
+ data = early_memremap(efi_setup, sizeof(*data));
+ if (!data) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (!data->smbios)
+ goto out_memremap;
+
+ sz = sizeof(efi_config_table_64_t);
+
+ p = tablep = early_memremap(tables, nr_tables * sz);
+ if (!p) {
+ pr_err("Could not map Configuration table!\n");
+ ret = -ENOMEM;
+ goto out_memremap;
+ }
+
+ for (i = 0; i < efi.systab->nr_tables; i++) {
+ efi_guid_t guid;
+
+ guid = ((efi_config_table_64_t *)p)->guid;
+
+ if (!efi_guidcmp(guid, SMBIOS_TABLE_GUID))
+ ((efi_config_table_64_t *)p)->table = data->smbios;
+ p += sz;
+ }
+ early_iounmap(tablep, nr_tables * sz);
+
+out_memremap:
+ early_iounmap(data, sizeof(*data));
+out:
+ return ret;
+}
+
+static void get_nr_runtime_map(void)
+{
+ if (!efi_setup)
+ return;
+
+ nr_efi_runtime_map = (efi_data_len - sizeof(struct efi_setup_data)) /
+ sizeof(efi_memory_desc_t);
+}
+
void __init efi_init(void)
{
efi_char16_t *c16;
int i = 0;
void *tmp;
+ get_nr_runtime_map();
#ifdef CONFIG_X86_32
if (boot_params.efi_info.efi_systab_hi ||
boot_params.efi_info.efi_memmap_hi) {
efi.systab->hdr.revision >> 16,
efi.systab->hdr.revision & 0xffff, vendor);
+ if (efi_reuse_config(efi.systab->tables, efi.systab->nr_tables))
+ return;
+
if (efi_config_init(arch_tables))
return;
return -ENOMEM;
}
+/*
+ * Map efi regions which were passed via setup_data. The virt_addr is a fixed
+ * addr which was used in first kernel of a kexec boot.
+ */
+static void __init efi_map_regions_fixed(void)
+{
+ void *p;
+ efi_memory_desc_t *md;
+
+ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ md = p;
+ efi_map_region_fixed(md); /* FIXME: add error handling */
+ get_systab_virt_addr(md);
+ }
+
+}
+
/*
* Map efi memory ranges for runtime serivce and update new_memmap with virtual
* addresses.
* so that we're in a different address space when calling a runtime
* function. For function arguments passing we do copy the PGDs of the
* kernel page table into ->trampoline_pgd prior to each call.
+ *
+ * Specially for kexec boot, efi runtime maps in previous kernel should
+ * be passed in via setup_data. In that case runtime ranges will be mapped
+ * to the same virtual addresses as the first kernel.
*/
void __init efi_enter_virtual_mode(void)
{
return;
}
- efi_merge_regions();
-
- new_memmap = efi_map_regions(&count);
- if (!new_memmap) {
- pr_err("Error reallocating memory, EFI runtime non-functional!\n");
- return;
+ if (efi_setup) {
+ efi_map_regions_fixed();
+ } else {
+ efi_merge_regions();
+ new_memmap = efi_map_regions(&count);
+ if (!new_memmap) {
+ pr_err("Error reallocating memory, EFI runtime non-functional!\n");
+ return;
+ }
}
err = save_runtime_map();
efi_setup_page_tables();
efi_sync_low_kernel_mappings();
- status = phys_efi_set_virtual_address_map(
- memmap.desc_size * count,
- memmap.desc_size,
- memmap.desc_version,
- (efi_memory_desc_t *)__pa(new_memmap));
-
- if (status != EFI_SUCCESS) {
- pr_alert("Unable to switch EFI into virtual mode "
- "(status=%lx)!\n", status);
- panic("EFI call to SetVirtualAddressMap() failed!");
+ if (!efi_setup) {
+ status = phys_efi_set_virtual_address_map(
+ memmap.desc_size * count,
+ memmap.desc_size,
+ memmap.desc_version,
+ (efi_memory_desc_t *)__pa(new_memmap));
+
+ if (status != EFI_SUCCESS) {
+ pr_alert("Unable to switch EFI into virtual mode (status=%lx)!\n",
+ status);
+ panic("EFI call to SetVirtualAddressMap() failed!");
+ }
}
/*
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
0, NULL);
-
- return;
}
/*
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff