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-rw-r--r--arch/x86/boot/compressed/Makefile5
-rw-r--r--arch/x86/boot/compressed/efi_mixed.S55
-rw-r--r--arch/x86/boot/compressed/head_32.S13
-rw-r--r--arch/x86/boot/compressed/head_64.S27
-rw-r--r--arch/x86/include/asm/efi.h7
-rw-r--r--arch/x86/include/asm/sev.h2
6 files changed, 12 insertions, 97 deletions
diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index 40d2ff503079..71fc531b95b4 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -74,6 +74,11 @@ LDFLAGS_vmlinux += -z noexecstack
ifeq ($(CONFIG_LD_IS_BFD),y)
LDFLAGS_vmlinux += $(call ld-option,--no-warn-rwx-segments)
endif
+ifeq ($(CONFIG_EFI_STUB),y)
+# ensure that the static EFI stub library will be pulled in, even if it is
+# never referenced explicitly from the startup code
+LDFLAGS_vmlinux += -u efi_pe_entry
+endif
LDFLAGS_vmlinux += -T
hostprogs := mkpiggy
diff --git a/arch/x86/boot/compressed/efi_mixed.S b/arch/x86/boot/compressed/efi_mixed.S
index 8a02a151806d..f4e22ef774ab 100644
--- a/arch/x86/boot/compressed/efi_mixed.S
+++ b/arch/x86/boot/compressed/efi_mixed.S
@@ -269,10 +269,6 @@ SYM_FUNC_START_LOCAL(efi32_entry)
jmp startup_32
SYM_FUNC_END(efi32_entry)
-#define ST32_boottime 60 // offsetof(efi_system_table_32_t, boottime)
-#define BS32_handle_protocol 88 // offsetof(efi_boot_services_32_t, handle_protocol)
-#define LI32_image_base 32 // offsetof(efi_loaded_image_32_t, image_base)
-
/*
* efi_status_t efi32_pe_entry(efi_handle_t image_handle,
* efi_system_table_32_t *sys_table)
@@ -280,8 +276,6 @@ SYM_FUNC_END(efi32_entry)
SYM_FUNC_START(efi32_pe_entry)
pushl %ebp
movl %esp, %ebp
- pushl %eax // dummy push to allocate loaded_image
-
pushl %ebx // save callee-save registers
pushl %edi
@@ -290,48 +284,8 @@ SYM_FUNC_START(efi32_pe_entry)
movl $0x80000003, %eax // EFI_UNSUPPORTED
jnz 2f
- call 1f
-1: pop %ebx
-
- /* Get the loaded image protocol pointer from the image handle */
- leal -4(%ebp), %eax
- pushl %eax // &loaded_image
- leal (loaded_image_proto - 1b)(%ebx), %eax
- pushl %eax // pass the GUID address
- pushl 8(%ebp) // pass the image handle
-
- /*
- * Note the alignment of the stack frame.
- * sys_table
- * handle <-- 16-byte aligned on entry by ABI
- * return address
- * frame pointer
- * loaded_image <-- local variable
- * saved %ebx <-- 16-byte aligned here
- * saved %edi
- * &loaded_image
- * &loaded_image_proto
- * handle <-- 16-byte aligned for call to handle_protocol
- */
-
- movl 12(%ebp), %eax // sys_table
- movl ST32_boottime(%eax), %eax // sys_table->boottime
- call *BS32_handle_protocol(%eax) // sys_table->boottime->handle_protocol
- addl $12, %esp // restore argument space
- testl %eax, %eax
- jnz 2f
-
movl 8(%ebp), %ecx // image_handle
movl 12(%ebp), %edx // sys_table
- movl -4(%ebp), %esi // loaded_image
- movl LI32_image_base(%esi), %esi // loaded_image->image_base
- leal (startup_32 - 1b)(%ebx), %ebp // runtime address of startup_32
- /*
- * We need to set the image_offset variable here since startup_32() will
- * use it before we get to the 64-bit efi_pe_entry() in C code.
- */
- subl %esi, %ebp // calculate image_offset
- movl %ebp, (image_offset - 1b)(%ebx) // save image_offset
xorl %esi, %esi
jmp efi32_entry // pass %ecx, %edx, %esi
// no other registers remain live
@@ -350,15 +304,6 @@ SYM_FUNC_START_NOALIGN(efi64_stub_entry)
SYM_FUNC_END(efi64_stub_entry)
#endif
- .section ".rodata"
- /* EFI loaded image protocol GUID */
- .balign 4
-SYM_DATA_START_LOCAL(loaded_image_proto)
- .long 0x5b1b31a1
- .word 0x9562, 0x11d2
- .byte 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b
-SYM_DATA_END(loaded_image_proto)
-
.data
.balign 8
SYM_DATA_START_LOCAL(efi32_boot_gdt)
diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S
index 3af4a383615b..1cfe9802a42f 100644
--- a/arch/x86/boot/compressed/head_32.S
+++ b/arch/x86/boot/compressed/head_32.S
@@ -84,19 +84,6 @@ SYM_FUNC_START(startup_32)
#ifdef CONFIG_RELOCATABLE
leal startup_32@GOTOFF(%edx), %ebx
-
-#ifdef CONFIG_EFI_STUB
-/*
- * If we were loaded via the EFI LoadImage service, startup_32() will be at an
- * offset to the start of the space allocated for the image. efi_pe_entry() will
- * set up image_offset to tell us where the image actually starts, so that we
- * can use the full available buffer.
- * image_offset = startup_32 - image_base
- * Otherwise image_offset will be zero and has no effect on the calculations.
- */
- subl image_offset@GOTOFF(%edx), %ebx
-#endif
-
movl BP_kernel_alignment(%esi), %eax
decl %eax
addl %eax, %ebx
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index 28f46051c706..bf4a10a5794f 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -146,19 +146,6 @@ SYM_FUNC_START(startup_32)
#ifdef CONFIG_RELOCATABLE
movl %ebp, %ebx
-
-#ifdef CONFIG_EFI_STUB
-/*
- * If we were loaded via the EFI LoadImage service, startup_32 will be at an
- * offset to the start of the space allocated for the image. efi_pe_entry will
- * set up image_offset to tell us where the image actually starts, so that we
- * can use the full available buffer.
- * image_offset = startup_32 - image_base
- * Otherwise image_offset will be zero and has no effect on the calculations.
- */
- subl rva(image_offset)(%ebp), %ebx
-#endif
-
movl BP_kernel_alignment(%esi), %eax
decl %eax
addl %eax, %ebx
@@ -335,20 +322,6 @@ SYM_CODE_START(startup_64)
/* Start with the delta to where the kernel will run at. */
#ifdef CONFIG_RELOCATABLE
leaq startup_32(%rip) /* - $startup_32 */, %rbp
-
-#ifdef CONFIG_EFI_STUB
-/*
- * If we were loaded via the EFI LoadImage service, startup_32 will be at an
- * offset to the start of the space allocated for the image. efi_pe_entry will
- * set up image_offset to tell us where the image actually starts, so that we
- * can use the full available buffer.
- * image_offset = startup_32 - image_base
- * Otherwise image_offset will be zero and has no effect on the calculations.
- */
- movl image_offset(%rip), %eax
- subq %rax, %rbp
-#endif
-
movl BP_kernel_alignment(%rsi), %eax
decl %eax
addq %rax, %rbp
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 8b4be7cecdb8..b0994ae3bc23 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -90,6 +90,8 @@ static inline void efi_fpu_end(void)
}
#ifdef CONFIG_X86_32
+#define EFI_X86_KERNEL_ALLOC_LIMIT (SZ_512M - 1)
+
#define arch_efi_call_virt_setup() \
({ \
efi_fpu_begin(); \
@@ -103,8 +105,7 @@ static inline void efi_fpu_end(void)
})
#else /* !CONFIG_X86_32 */
-
-#define EFI_LOADER_SIGNATURE "EL64"
+#define EFI_X86_KERNEL_ALLOC_LIMIT EFI_ALLOC_LIMIT
extern asmlinkage u64 __efi_call(void *fp, ...);
@@ -218,6 +219,8 @@ efi_status_t efi_set_virtual_address_map(unsigned long memory_map_size,
#ifdef CONFIG_EFI_MIXED
+#define EFI_ALLOC_LIMIT (efi_is_64bit() ? ULONG_MAX : U32_MAX)
+
#define ARCH_HAS_EFISTUB_WRAPPERS
static inline bool efi_is_64bit(void)
diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h
index b97d239e18ea..5b4a1ce3d368 100644
--- a/arch/x86/include/asm/sev.h
+++ b/arch/x86/include/asm/sev.h
@@ -164,6 +164,7 @@ static __always_inline void sev_es_nmi_complete(void)
__sev_es_nmi_complete();
}
extern int __init sev_es_efi_map_ghcbs(pgd_t *pgd);
+extern void sev_enable(struct boot_params *bp);
static inline int rmpadjust(unsigned long vaddr, bool rmp_psize, unsigned long attrs)
{
@@ -218,6 +219,7 @@ static inline void sev_es_ist_exit(void) { }
static inline int sev_es_setup_ap_jump_table(struct real_mode_header *rmh) { return 0; }
static inline void sev_es_nmi_complete(void) { }
static inline int sev_es_efi_map_ghcbs(pgd_t *pgd) { return 0; }
+static inline void sev_enable(struct boot_params *bp) { }
static inline int pvalidate(unsigned long vaddr, bool rmp_psize, bool validate) { return 0; }
static inline int rmpadjust(unsigned long vaddr, bool rmp_psize, unsigned long attrs) { return 0; }
static inline void setup_ghcb(void) { }