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-rw-r--r--arch/x86/platform/efi/efi.c122
1 files changed, 107 insertions, 15 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 0d3a4fa3456..3ae4128013e 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -51,7 +51,17 @@
int efi_enabled;
EXPORT_SYMBOL(efi_enabled);
-struct efi efi;
+struct efi __read_mostly efi = {
+ .mps = EFI_INVALID_TABLE_ADDR,
+ .acpi = EFI_INVALID_TABLE_ADDR,
+ .acpi20 = EFI_INVALID_TABLE_ADDR,
+ .smbios = EFI_INVALID_TABLE_ADDR,
+ .sal_systab = EFI_INVALID_TABLE_ADDR,
+ .boot_info = EFI_INVALID_TABLE_ADDR,
+ .hcdp = EFI_INVALID_TABLE_ADDR,
+ .uga = EFI_INVALID_TABLE_ADDR,
+ .uv_systab = EFI_INVALID_TABLE_ADDR,
+};
EXPORT_SYMBOL(efi);
struct efi_memory_map memmap;
@@ -79,26 +89,50 @@ early_param("add_efi_memmap", setup_add_efi_memmap);
static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
{
- return efi_call_virt2(get_time, tm, tc);
+ unsigned long flags;
+ efi_status_t status;
+
+ spin_lock_irqsave(&rtc_lock, flags);
+ status = efi_call_virt2(get_time, tm, tc);
+ spin_unlock_irqrestore(&rtc_lock, flags);
+ return status;
}
static efi_status_t virt_efi_set_time(efi_time_t *tm)
{
- return efi_call_virt1(set_time, tm);
+ unsigned long flags;
+ efi_status_t status;
+
+ spin_lock_irqsave(&rtc_lock, flags);
+ status = efi_call_virt1(set_time, tm);
+ spin_unlock_irqrestore(&rtc_lock, flags);
+ return status;
}
static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled,
efi_bool_t *pending,
efi_time_t *tm)
{
- return efi_call_virt3(get_wakeup_time,
- enabled, pending, tm);
+ unsigned long flags;
+ efi_status_t status;
+
+ spin_lock_irqsave(&rtc_lock, flags);
+ status = efi_call_virt3(get_wakeup_time,
+ enabled, pending, tm);
+ spin_unlock_irqrestore(&rtc_lock, flags);
+ return status;
}
static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
{
- return efi_call_virt2(set_wakeup_time,
- enabled, tm);
+ unsigned long flags;
+ efi_status_t status;
+
+ spin_lock_irqsave(&rtc_lock, flags);
+ status = efi_call_virt2(set_wakeup_time,
+ enabled, tm);
+ spin_unlock_irqrestore(&rtc_lock, flags);
+ return status;
}
static efi_status_t virt_efi_get_variable(efi_char16_t *name,
@@ -122,7 +156,7 @@ static efi_status_t virt_efi_get_next_variable(unsigned long *name_size,
static efi_status_t virt_efi_set_variable(efi_char16_t *name,
efi_guid_t *vendor,
- unsigned long attr,
+ u32 attr,
unsigned long data_size,
void *data)
{
@@ -131,6 +165,18 @@ static efi_status_t virt_efi_set_variable(efi_char16_t *name,
data_size, data);
}
+static efi_status_t virt_efi_query_variable_info(u32 attr,
+ u64 *storage_space,
+ u64 *remaining_space,
+ u64 *max_variable_size)
+{
+ if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
+ return EFI_UNSUPPORTED;
+
+ return efi_call_virt4(query_variable_info, attr, storage_space,
+ remaining_space, max_variable_size);
+}
+
static efi_status_t virt_efi_get_next_high_mono_count(u32 *count)
{
return efi_call_virt1(get_next_high_mono_count, count);
@@ -145,6 +191,28 @@ static void virt_efi_reset_system(int reset_type,
data_size, data);
}
+static efi_status_t virt_efi_update_capsule(efi_capsule_header_t **capsules,
+ unsigned long count,
+ unsigned long sg_list)
+{
+ if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
+ return EFI_UNSUPPORTED;
+
+ return efi_call_virt3(update_capsule, capsules, count, sg_list);
+}
+
+static efi_status_t virt_efi_query_capsule_caps(efi_capsule_header_t **capsules,
+ unsigned long count,
+ u64 *max_size,
+ int *reset_type)
+{
+ if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
+ return EFI_UNSUPPORTED;
+
+ return efi_call_virt4(query_capsule_caps, capsules, count, max_size,
+ reset_type);
+}
+
static efi_status_t __init phys_efi_set_virtual_address_map(
unsigned long memory_map_size,
unsigned long descriptor_size,
@@ -164,11 +232,14 @@ static efi_status_t __init phys_efi_set_virtual_address_map(
static efi_status_t __init phys_efi_get_time(efi_time_t *tm,
efi_time_cap_t *tc)
{
+ unsigned long flags;
efi_status_t status;
+ spin_lock_irqsave(&rtc_lock, flags);
efi_call_phys_prelog();
status = efi_call_phys2(efi_phys.get_time, tm, tc);
efi_call_phys_epilog();
+ spin_unlock_irqrestore(&rtc_lock, flags);
return status;
}
@@ -310,14 +381,31 @@ void __init efi_reserve_boot_services(void)
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
efi_memory_desc_t *md = p;
- unsigned long long start = md->phys_addr;
- unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
+ u64 start = md->phys_addr;
+ u64 size = md->num_pages << EFI_PAGE_SHIFT;
if (md->type != EFI_BOOT_SERVICES_CODE &&
md->type != EFI_BOOT_SERVICES_DATA)
continue;
-
- memblock_x86_reserve_range(start, start + size, "EFI Boot");
+ /* Only reserve where possible:
+ * - Not within any already allocated areas
+ * - Not over any memory area (really needed, if above?)
+ * - Not within any part of the kernel
+ * - Not the bios reserved area
+ */
+ if ((start+size >= virt_to_phys(_text)
+ && start <= virt_to_phys(_end)) ||
+ !e820_all_mapped(start, start+size, E820_RAM) ||
+ memblock_x86_check_reserved_size(&start, &size,
+ 1<<EFI_PAGE_SHIFT)) {
+ /* Could not reserve, skip it */
+ md->num_pages = 0;
+ memblock_dbg(PFX "Could not reserve boot range "
+ "[0x%010llx-0x%010llx]\n",
+ start, start+size-1);
+ } else
+ memblock_x86_reserve_range(start, start+size,
+ "EFI Boot");
}
}
@@ -334,6 +422,10 @@ static void __init efi_free_boot_services(void)
md->type != EFI_BOOT_SERVICES_DATA)
continue;
+ /* Could not reserve boot area */
+ if (!size)
+ continue;
+
free_bootmem_late(start, size);
}
}
@@ -483,9 +575,6 @@ void __init efi_init(void)
x86_platform.set_wallclock = efi_set_rtc_mmss;
#endif
- /* Setup for EFI runtime service */
- reboot_type = BOOT_EFI;
-
#if EFI_DEBUG
print_efi_memmap();
#endif
@@ -651,6 +740,9 @@ void __init efi_enter_virtual_mode(void)
efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;
efi.reset_system = virt_efi_reset_system;
efi.set_virtual_address_map = NULL;
+ efi.query_variable_info = virt_efi_query_variable_info;
+ efi.update_capsule = virt_efi_update_capsule;
+ efi.query_capsule_caps = virt_efi_query_capsule_caps;
if (__supported_pte_mask & _PAGE_NX)
runtime_code_page_mkexec();
early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 13:44:20 +0000