#f " called with too many arguments (" #p ">" #n ")"); \
})
+static inline void efi_fpu_begin(void)
+{
+ /*
+ * The UEFI calling convention (UEFI spec 2.3.2 and 2.3.4) requires
+ * that FCW and MXCSR (64-bit) must be initialized prior to calling
+ * UEFI code. (Oddly the spec does not require that the FPU stack
+ * be empty.)
+ */
+ kernel_fpu_begin_mask(KFPU_387 | KFPU_MXCSR);
+}
+
+static inline void efi_fpu_end(void)
+{
+ kernel_fpu_end();
+}
+
#ifdef CONFIG_X86_32
#define arch_efi_call_virt_setup() \
({ \
- kernel_fpu_begin(); \
+ efi_fpu_begin(); \
firmware_restrict_branch_speculation_start(); \
})
#define arch_efi_call_virt_teardown() \
({ \
firmware_restrict_branch_speculation_end(); \
- kernel_fpu_end(); \
+ efi_fpu_end(); \
})
#define arch_efi_call_virt(p, f, args...) p->f(args)
#define arch_efi_call_virt_setup() \
({ \
efi_sync_low_kernel_mappings(); \
- kernel_fpu_begin(); \
+ efi_fpu_begin(); \
firmware_restrict_branch_speculation_start(); \
efi_switch_mm(&efi_mm); \
})
({ \
efi_switch_mm(efi_scratch.prev_mm); \
firmware_restrict_branch_speculation_end(); \
- kernel_fpu_end(); \
+ efi_fpu_end(); \
})
#ifdef CONFIG_KASAN
virtual_map);
efi_switch_mm(&efi_mm);
- kernel_fpu_begin();
+ efi_fpu_begin();
/* Disable interrupts around EFI calls: */
local_irq_save(flags);
descriptor_version, virtual_map);
local_irq_restore(flags);
- kernel_fpu_end();
+ efi_fpu_end();
/* grab the virtually remapped EFI runtime services table pointer */
efi.runtime = READ_ONCE(systab->runtime);