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Date:   Mon, 13 Jul 2020 16:30:07 -0500
From:   steve.wahl@hpe.com
To:     Steve Wahl <steve.wahl@hpe.com>, Jonathan Corbet <corbet@lwn.net>,
        Ard Biesheuvel <ardb@kernel.org>,
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        Andy Shevchenko <andy@infradead.org>,
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Cc:     Russ Anderson <rja@hpe.com>
Subject: [patch v3 13/13] x86: Remove (now unused) EFI_UV1_MEMMAP from efi.h
References: <20200713212954.444086564@hpe.com>
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Sender: linux-kernel-owner@vger.kernel.org
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With UV1 support removed, EFI_UV1_MEMMAP is no longer used.

Signed-off-by: Steve Wahl <steve.wahl@hpe.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/x86/include/asm/efi.h |   20 ++------------------
 1 file changed, 2 insertions(+), 18 deletions(-)

--- linux.orig/arch/x86/include/asm/efi.h	2020-07-07 10:49:49.753511000 -0500
+++ linux/arch/x86/include/asm/efi.h	2020-07-07 10:56:15.821045006 -0500
@@ -22,17 +22,7 @@ extern unsigned long efi_fw_vendor, efi_
  *
  * 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(vo
 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 {