5 files changed, 53 insertions, 6 deletions
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 606a4b6a9812..43a82e59c59d 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -242,6 +242,7 @@ static inline bool efi_is_64bit(void)
 		__efi_early()->runtime_services), __VA_ARGS__)
 
 extern bool efi_reboot_required(void);
+extern bool efi_is_table_address(unsigned long phys_addr);
 
 #else
 static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {}
@@ -249,6 +250,10 @@ static inline bool efi_reboot_required(void)
 {
 	return false;
 }
+static inline  bool efi_is_table_address(unsigned long phys_addr)
+{
+	return false;
+}
 #endif /* CONFIG_EFI */
 
 #endif /* _ASM_X86_EFI_H */
diff --git a/arch/x86/include/asm/uv/uv.h b/arch/x86/include/asm/uv/uv.h
index e60c45fd3679..6bc6d89d8e2a 100644
--- a/arch/x86/include/asm/uv/uv.h
+++ b/arch/x86/include/asm/uv/uv.h
@@ -12,10 +12,12 @@ struct mm_struct;
 #ifdef CONFIG_X86_UV
 #include <linux/efi.h>
 
+extern unsigned long uv_systab_phys;
+
 extern enum uv_system_type get_uv_system_type(void);
 static inline bool is_early_uv_system(void)
 {
-	return !((efi.uv_systab == EFI_INVALID_TABLE_ADDR) || !efi.uv_systab);
+	return uv_systab_phys && uv_systab_phys != EFI_INVALID_TABLE_ADDR;
 }
 extern int is_uv_system(void);
 extern int is_uv_hubless(void);
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 63e99f15d7cf..a39dcdb5ae34 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -19,6 +19,7 @@
 
 #include <asm/set_memory.h>
 #include <asm/e820/api.h>
+#include <asm/efi.h>
 #include <asm/fixmap.h>
 #include <asm/pgtable.h>
 #include <asm/tlbflush.h>
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index a7189a3b4d70..c202e1b07e29 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -59,11 +59,34 @@ static efi_system_table_t efi_systab __initdata;
 
 static efi_config_table_type_t arch_tables[] __initdata = {
 #ifdef CONFIG_X86_UV
-	{UV_SYSTEM_TABLE_GUID, "UVsystab", &efi.uv_systab},
+	{UV_SYSTEM_TABLE_GUID, "UVsystab", &uv_systab_phys},
 #endif
 	{NULL_GUID, NULL, NULL},
 };
 
+static const unsigned long * const efi_tables[] = {
+	&efi.mps,
+	&efi.acpi,
+	&efi.acpi20,
+	&efi.smbios,
+	&efi.smbios3,
+	&efi.boot_info,
+	&efi.hcdp,
+	&efi.uga,
+#ifdef CONFIG_X86_UV
+	&uv_systab_phys,
+#endif
+	&efi.fw_vendor,
+	&efi.runtime,
+	&efi.config_table,
+	&efi.esrt,
+	&efi.properties_table,
+	&efi.mem_attr_table,
+#ifdef CONFIG_EFI_RCI2_TABLE
+	&rci2_table_phys,
+#endif
+};
+
 u64 efi_setup;		/* efi setup_data physical address */
 
 static int add_efi_memmap __initdata;
@@ -1049,3 +1072,17 @@ static int __init arch_parse_efi_cmdline(char *str)
 	return 0;
 }
 early_param("efi", arch_parse_efi_cmdline);
+
+bool efi_is_table_address(unsigned long phys_addr)
+{
+	unsigned int i;
+
+	if (phys_addr == EFI_INVALID_TABLE_ADDR)
+		return false;
+
+	for (i = 0; i < ARRAY_SIZE(efi_tables); i++)
+		if (*(efi_tables[i]) == phys_addr)
+			return true;
+
+	return false;
+}
diff --git a/arch/x86/platform/uv/bios_uv.c b/arch/x86/platform/uv/bios_uv.c
index 7c69652ffeea..c2ee31953372 100644
--- a/arch/x86/platform/uv/bios_uv.c
+++ b/arch/x86/platform/uv/bios_uv.c
@@ -14,6 +14,8 @@
 #include <asm/uv/bios.h>
 #include <asm/uv/uv_hub.h>
 
+unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
+
 struct uv_systab *uv_systab;
 
 static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
@@ -185,13 +187,13 @@ EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
 void uv_bios_init(void)
 {
 	uv_systab = NULL;
-	if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
-	    !efi.uv_systab || efi_runtime_disabled()) {
+	if ((uv_systab_phys == EFI_INVALID_TABLE_ADDR) ||
+	    !uv_systab_phys || efi_runtime_disabled()) {
 		pr_crit("UV: UVsystab: missing\n");
 		return;
 	}
 
-	uv_systab = ioremap(efi.uv_systab, sizeof(struct uv_systab));
+	uv_systab = ioremap(uv_systab_phys, sizeof(struct uv_systab));
 	if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
 		pr_err("UV: UVsystab: bad signature!\n");
 		iounmap(uv_systab);
@@ -203,7 +205,7 @@ void uv_bios_init(void)
 		int size = uv_systab->size;
 
 		iounmap(uv_systab);
-		uv_systab = ioremap(efi.uv_systab, size);
+		uv_systab = ioremap(uv_systab_phys, size);
 		if (!uv_systab) {
 			pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
 			return;