Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into core/efi

Pull v4.4 EFI updates from Matt Fleming:

  - Make the EFI System Resource Table (ESRT) driver explicitly
    non-modular by ripping out the module_* code since Kconfig doesn't
    allow it to be built as a module anyway. (Paul Gortmaker)

  - Make the x86 efi=debug kernel parameter, which enables EFI debug
    code and output, generic and usable by arm64. (Leif Lindholm)

  - Add support to the x86 EFI boot stub for 64-bit Graphics Output
    Protocol frame buffer addresses. (Matt Fleming)

  - Detect when the UEFI v2.5 EFI_PROPERTIES_TABLE feature is enabled
    in the firmware and set an efi.flags bit so the kernel knows when
    it can apply more strict runtime mapping attributes - Ard Biesheuvel

  - Auto-load the efi-pstore module on EFI systems, just like we
    currently do for the efivars module. (Ben Hutchings)

  - Add "efi_fake_mem" kernel parameter which allows the system's EFI
    memory map to be updated with additional attributes for specific
    memory ranges. This is useful for testing the kernel code that handles
    the EFI_MEMORY_MORE_RELIABLE memmap bit even if your firmware
    doesn't include support. (Taku Izumi)

Note: there is a semantic conflict between the following two commits:

  8a53554e12e9 ("x86/efi: Fix multiple GOP device support")
  ae2ee627dc87 ("efifb: Add support for 64-bit frame buffer addresses")

I fixed up the interaction in the merge commit, changing the type of
current_fb_base from u32 to u64.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 22 insertions, 6 deletions

diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index db51c1f..583d539 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -624,7 +624,7 @@ setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
 static efi_status_t
 __gop_query32(struct efi_graphics_output_protocol_32 *gop32,
 	      struct efi_graphics_output_mode_info **info,
-	      unsigned long *size, u32 *fb_base)
+	      unsigned long *size, u64 *fb_base)
 {
 	struct efi_graphics_output_protocol_mode_32 *mode;
 	efi_status_t status;
@@ -650,7 +650,8 @@ setup_gop32(struct screen_info *si, efi_guid_t *proto,
 	unsigned long nr_gops;
 	u16 width, height;
 	u32 pixels_per_scan_line;
-	u32 fb_base;
+	u32 ext_lfb_base;
+	u64 fb_base;
 	struct efi_pixel_bitmask pixel_info;
 	int pixel_format;
 	efi_status_t status;
@@ -667,7 +668,7 @@ setup_gop32(struct screen_info *si, efi_guid_t *proto,
 		bool conout_found = false;
 		void *dummy = NULL;
 		u32 h = handles[i];
-		u32 current_fb_base;
+		u64 current_fb_base;
 
 		status = efi_call_early(handle_protocol, h,
 					proto, (void **)&gop32);
@@ -715,6 +716,13 @@ setup_gop32(struct screen_info *si, efi_guid_t *proto,
 	si->lfb_width = width;
 	si->lfb_height = height;
 	si->lfb_base = fb_base;
+
+	ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
+	if (ext_lfb_base) {
+		si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
+		si->ext_lfb_base = ext_lfb_base;
+	}
+
 	si->pages = 1;
 
 	setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
@@ -729,7 +737,7 @@ out:
 static efi_status_t
 __gop_query64(struct efi_graphics_output_protocol_64 *gop64,
 	      struct efi_graphics_output_mode_info **info,
-	      unsigned long *size, u32 *fb_base)
+	      unsigned long *size, u64 *fb_base)
 {
 	struct efi_graphics_output_protocol_mode_64 *mode;
 	efi_status_t status;
@@ -755,7 +763,8 @@ setup_gop64(struct screen_info *si, efi_guid_t *proto,
 	unsigned long nr_gops;
 	u16 width, height;
 	u32 pixels_per_scan_line;
-	u32 fb_base;
+	u32 ext_lfb_base;
+	u64 fb_base;
 	struct efi_pixel_bitmask pixel_info;
 	int pixel_format;
 	efi_status_t status;
@@ -772,7 +781,7 @@ setup_gop64(struct screen_info *si, efi_guid_t *proto,
 		bool conout_found = false;
 		void *dummy = NULL;
 		u64 h = handles[i];
-		u32 current_fb_base;
+		u64 current_fb_base;
 
 		status = efi_call_early(handle_protocol, h,
 					proto, (void **)&gop64);
@@ -820,6 +829,13 @@ setup_gop64(struct screen_info *si, efi_guid_t *proto,
 	si->lfb_width = width;
 	si->lfb_height = height;
 	si->lfb_base = fb_base;
+
+	ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
+	if (ext_lfb_base) {
+		si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
+		si->ext_lfb_base = ext_lfb_base;
+	}
+
 	si->pages = 1;
 
 	setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);