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Date:   Fri, 17 Jul 2020 14:51:06 -0000
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Subject: [tip: x86/platform] x86/efi: Remove unused EFI_UV1_MEMMAP code
Cc:     Steve Wahl <steve.wahl@hpe.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ard Biesheuvel <ardb@kernel.org>, x86 <x86@kernel.org>,
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The following commit has been merged into the x86/platform branch of tip:

Commit-ID:     3bcf25a40b018e632d70bb866d75746748953fbc
Gitweb:        https://git.kernel.org/tip/3bcf25a40b018e632d70bb866d75746748953fbc
Author:        steve.wahl@hpe.com <steve.wahl@hpe.com>
AuthorDate:    Mon, 13 Jul 2020 16:30:07 -05:00
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Fri, 17 Jul 2020 16:47:48 +02:00

x86/efi: Remove unused EFI_UV1_MEMMAP code

With UV1 support removed, EFI_UV1_MEMMAP is no longer used.

Signed-off-by: Steve Wahl <steve.wahl@hpe.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lkml.kernel.org/r/20200713212956.019149227@hpe.com

---
 arch/x86/include/asm/efi.h | 20 ++------------------
 1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index e7d2ccf..b9c2667 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -22,17 +22,7 @@ extern unsigned long efi_fw_vendor, efi_config_table;
  *
  * This is the main reason why we're doing stable VA mappings for RT
  * services.
- *
- * SGI UV1 machines are known to be incompatible with this scheme, so we
- * provide an opt-out for these machines via a DMI quirk that sets the
- * attribute below.
  */
-#define EFI_UV1_MEMMAP         EFI_ARCH_1
-
-static inline bool efi_have_uv1_memmap(void)
-{
-	return IS_ENABLED(CONFIG_X86_UV) && efi_enabled(EFI_UV1_MEMMAP);
-}
 
 #define EFI32_LOADER_SIGNATURE	"EL32"
 #define EFI64_LOADER_SIGNATURE	"EL64"
@@ -122,9 +112,7 @@ struct efi_scratch {
 	efi_sync_low_kernel_mappings();					\
 	kernel_fpu_begin();						\
 	firmware_restrict_branch_speculation_start();			\
-									\
-	if (!efi_have_uv1_memmap())					\
-		efi_switch_mm(&efi_mm);					\
+	efi_switch_mm(&efi_mm);						\
 })
 
 #define arch_efi_call_virt(p, f, args...)				\
@@ -132,9 +120,7 @@ struct efi_scratch {
 
 #define arch_efi_call_virt_teardown()					\
 ({									\
-	if (!efi_have_uv1_memmap())					\
-		efi_switch_mm(efi_scratch.prev_mm);			\
-									\
+	efi_switch_mm(efi_scratch.prev_mm);				\
 	firmware_restrict_branch_speculation_end();			\
 	kernel_fpu_end();						\
 })
@@ -176,8 +162,6 @@ extern void efi_delete_dummy_variable(void);
 extern void efi_switch_mm(struct mm_struct *mm);
 extern void efi_recover_from_page_fault(unsigned long phys_addr);
 extern void efi_free_boot_services(void);
-extern pgd_t * __init efi_uv1_memmap_phys_prolog(void);
-extern void __init efi_uv1_memmap_phys_epilog(pgd_t *save_pgd);
 
 /* kexec external ABI */
 struct efi_setup_data {