[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/firmware/efi/runtime-wrappers.c b/src/kernel/linux/v4.14/drivers/firmware/efi/runtime-wrappers.c
new file mode 100644
index 0000000..dd7f633
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/firmware/efi/runtime-wrappers.c
@@ -0,0 +1,321 @@
+/*
+ * runtime-wrappers.c - Runtime Services function call wrappers
+ *
+ * Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
+ *
+ * Split off from arch/x86/platform/efi/efi.c
+ *
+ * Copyright (C) 1999 VA Linux Systems
+ * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
+ * Copyright (C) 1999-2002 Hewlett-Packard Co.
+ * Copyright (C) 2005-2008 Intel Co.
+ * Copyright (C) 2013 SuSE Labs
+ *
+ * This file is released under the GPLv2.
+ */
+
+#define pr_fmt(fmt) "efi: " fmt
+
+#include <linux/bug.h>
+#include <linux/efi.h>
+#include <linux/irqflags.h>
+#include <linux/mutex.h>
+#include <linux/semaphore.h>
+#include <linux/stringify.h>
+#include <asm/efi.h>
+
+/*
+ * Wrap around the new efi_call_virt_generic() macros so that the
+ * code doesn't get too cluttered:
+ */
+#define efi_call_virt(f, args...) \
+ efi_call_virt_pointer(efi.systab->runtime, f, args)
+#define __efi_call_virt(f, args...) \
+ __efi_call_virt_pointer(efi.systab->runtime, f, args)
+
+void efi_call_virt_check_flags(unsigned long flags, const char *call)
+{
+ unsigned long cur_flags, mismatch;
+
+ local_save_flags(cur_flags);
+
+ mismatch = flags ^ cur_flags;
+ if (!WARN_ON_ONCE(mismatch & ARCH_EFI_IRQ_FLAGS_MASK))
+ return;
+
+ add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_NOW_UNRELIABLE);
+ pr_err_ratelimited(FW_BUG "IRQ flags corrupted (0x%08lx=>0x%08lx) by EFI %s\n",
+ flags, cur_flags, call);
+ local_irq_restore(flags);
+}
+
+/*
+ * Expose the EFI runtime lock to the UV platform
+ */
+#ifdef CONFIG_X86_UV
+extern struct semaphore __efi_uv_runtime_lock __alias(efi_runtime_lock);
+#endif
+
+/*
+ * According to section 7.1 of the UEFI spec, Runtime Services are not fully
+ * reentrant, and there are particular combinations of calls that need to be
+ * serialized. (source: UEFI Specification v2.4A)
+ *
+ * Table 31. Rules for Reentry Into Runtime Services
+ * +------------------------------------+-------------------------------+
+ * | If previous call is busy in | Forbidden to call |
+ * +------------------------------------+-------------------------------+
+ * | Any | SetVirtualAddressMap() |
+ * +------------------------------------+-------------------------------+
+ * | ConvertPointer() | ConvertPointer() |
+ * +------------------------------------+-------------------------------+
+ * | SetVariable() | ResetSystem() |
+ * | UpdateCapsule() | |
+ * | SetTime() | |
+ * | SetWakeupTime() | |
+ * | GetNextHighMonotonicCount() | |
+ * +------------------------------------+-------------------------------+
+ * | GetVariable() | GetVariable() |
+ * | GetNextVariableName() | GetNextVariableName() |
+ * | SetVariable() | SetVariable() |
+ * | QueryVariableInfo() | QueryVariableInfo() |
+ * | UpdateCapsule() | UpdateCapsule() |
+ * | QueryCapsuleCapabilities() | QueryCapsuleCapabilities() |
+ * | GetNextHighMonotonicCount() | GetNextHighMonotonicCount() |
+ * +------------------------------------+-------------------------------+
+ * | GetTime() | GetTime() |
+ * | SetTime() | SetTime() |
+ * | GetWakeupTime() | GetWakeupTime() |
+ * | SetWakeupTime() | SetWakeupTime() |
+ * +------------------------------------+-------------------------------+
+ *
+ * Due to the fact that the EFI pstore may write to the variable store in
+ * interrupt context, we need to use a lock for at least the groups that
+ * contain SetVariable() and QueryVariableInfo(). That leaves little else, as
+ * none of the remaining functions are actually ever called at runtime.
+ * So let's just use a single lock to serialize all Runtime Services calls.
+ */
+static DEFINE_SEMAPHORE(efi_runtime_lock);
+
+static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
+{
+ efi_status_t status;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(get_time, tm, tc);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static efi_status_t virt_efi_set_time(efi_time_t *tm)
+{
+ efi_status_t status;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(set_time, tm);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled,
+ efi_bool_t *pending,
+ efi_time_t *tm)
+{
+ efi_status_t status;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(get_wakeup_time, enabled, pending, tm);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm)
+{
+ efi_status_t status;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(set_wakeup_time, enabled, tm);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static efi_status_t virt_efi_get_variable(efi_char16_t *name,
+ efi_guid_t *vendor,
+ u32 *attr,
+ unsigned long *data_size,
+ void *data)
+{
+ efi_status_t status;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(get_variable, name, vendor, attr, data_size,
+ data);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static efi_status_t virt_efi_get_next_variable(unsigned long *name_size,
+ efi_char16_t *name,
+ efi_guid_t *vendor)
+{
+ efi_status_t status;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(get_next_variable, name_size, name, vendor);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static efi_status_t virt_efi_set_variable(efi_char16_t *name,
+ efi_guid_t *vendor,
+ u32 attr,
+ unsigned long data_size,
+ void *data)
+{
+ efi_status_t status;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(set_variable, name, vendor, attr, data_size,
+ data);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static efi_status_t
+virt_efi_set_variable_nonblocking(efi_char16_t *name, efi_guid_t *vendor,
+ u32 attr, unsigned long data_size,
+ void *data)
+{
+ efi_status_t status;
+
+ if (down_trylock(&efi_runtime_lock))
+ return EFI_NOT_READY;
+
+ status = efi_call_virt(set_variable, name, vendor, attr, data_size,
+ data);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+
+static efi_status_t virt_efi_query_variable_info(u32 attr,
+ u64 *storage_space,
+ u64 *remaining_space,
+ u64 *max_variable_size)
+{
+ efi_status_t status;
+
+ if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
+ return EFI_UNSUPPORTED;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(query_variable_info, attr, storage_space,
+ remaining_space, max_variable_size);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static efi_status_t
+virt_efi_query_variable_info_nonblocking(u32 attr,
+ u64 *storage_space,
+ u64 *remaining_space,
+ u64 *max_variable_size)
+{
+ efi_status_t status;
+
+ if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
+ return EFI_UNSUPPORTED;
+
+ if (down_trylock(&efi_runtime_lock))
+ return EFI_NOT_READY;
+
+ status = efi_call_virt(query_variable_info, attr, storage_space,
+ remaining_space, max_variable_size);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static efi_status_t virt_efi_get_next_high_mono_count(u32 *count)
+{
+ efi_status_t status;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(get_next_high_mono_count, count);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static void virt_efi_reset_system(int reset_type,
+ efi_status_t status,
+ unsigned long data_size,
+ efi_char16_t *data)
+{
+ if (down_interruptible(&efi_runtime_lock)) {
+ pr_warn("failed to invoke the reset_system() runtime service:\n"
+ "could not get exclusive access to the firmware\n");
+ return;
+ }
+ __efi_call_virt(reset_system, reset_type, status, data_size, data);
+ up(&efi_runtime_lock);
+}
+
+static efi_status_t virt_efi_update_capsule(efi_capsule_header_t **capsules,
+ unsigned long count,
+ unsigned long sg_list)
+{
+ efi_status_t status;
+
+ if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
+ return EFI_UNSUPPORTED;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(update_capsule, capsules, count, sg_list);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+static efi_status_t virt_efi_query_capsule_caps(efi_capsule_header_t **capsules,
+ unsigned long count,
+ u64 *max_size,
+ int *reset_type)
+{
+ efi_status_t status;
+
+ if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)
+ return EFI_UNSUPPORTED;
+
+ if (down_interruptible(&efi_runtime_lock))
+ return EFI_ABORTED;
+ status = efi_call_virt(query_capsule_caps, capsules, count, max_size,
+ reset_type);
+ up(&efi_runtime_lock);
+ return status;
+}
+
+void efi_native_runtime_setup(void)
+{
+ efi.get_time = virt_efi_get_time;
+ efi.set_time = virt_efi_set_time;
+ efi.get_wakeup_time = virt_efi_get_wakeup_time;
+ efi.set_wakeup_time = virt_efi_set_wakeup_time;
+ efi.get_variable = virt_efi_get_variable;
+ efi.get_next_variable = virt_efi_get_next_variable;
+ efi.set_variable = virt_efi_set_variable;
+ efi.set_variable_nonblocking = virt_efi_set_variable_nonblocking;
+ efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;
+ efi.reset_system = virt_efi_reset_system;
+ efi.query_variable_info = virt_efi_query_variable_info;
+ efi.query_variable_info_nonblocking = virt_efi_query_variable_info_nonblocking;
+ efi.update_capsule = virt_efi_update_capsule;
+ efi.query_capsule_caps = virt_efi_query_capsule_caps;
+}