x86/efi: Quirk out SGI UV

Alex reported hitting the following BUG after the EFI 1:1 virtual
mapping work was merged,

 kernel BUG at arch/x86/mm/init_64.c:351!
 invalid opcode: 0000 [#1] SMP
 Call Trace:
  [<ffffffff818aa71d>] init_extra_mapping_uc+0x13/0x15
  [<ffffffff818a5e20>] uv_system_init+0x22b/0x124b
  [<ffffffff8108b886>] ? clockevents_register_device+0x138/0x13d
  [<ffffffff81028dbb>] ? setup_APIC_timer+0xc5/0xc7
  [<ffffffff8108b620>] ? clockevent_delta2ns+0xb/0xd
  [<ffffffff818a3a92>] ? setup_boot_APIC_clock+0x4a8/0x4b7
  [<ffffffff8153d955>] ? printk+0x72/0x74
  [<ffffffff818a1757>] native_smp_prepare_cpus+0x389/0x3d6
  [<ffffffff818957bc>] kernel_init_freeable+0xb7/0x1fb
  [<ffffffff81535530>] ? rest_init+0x74/0x74
  [<ffffffff81535539>] kernel_init+0x9/0xff
  [<ffffffff81541dfc>] ret_from_fork+0x7c/0xb0
  [<ffffffff81535530>] ? rest_init+0x74/0x74

Getting this thing to work with the new mapping scheme would need more
work, so automatically switch to the old memmap layout for SGI UV.

Acked-by: Russ Anderson <rja@sgi.com>
Cc: Alex Thorlton <athorlton@sgi.com
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>

diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 3d6b9f81cc683e63fbdac6c3243ab7069087e0cd..acd86c850414e7f3adfffe860ffd22bd17e0d459 100644 (file)
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -134,6 +134,7 @@ extern void efi_setup_page_tables(void);
 extern void __init old_map_region(efi_memory_desc_t *md);
 extern void __init runtime_code_page_mkexec(void);
 extern void __init efi_runtime_mkexec(void);
+extern void __init efi_apply_memmap_quirks(void);
 
 struct efi_setup_data {
        u64 fw_vendor;

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 06853e6703541f8349106e17330f86621fa984db..ce72964b2f469db1b3c626ecadc18c2998ef98a4 100644 (file)
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1239,14 +1239,8 @@ void __init setup_arch(char **cmdline_p)
        register_refined_jiffies(CLOCK_TICK_RATE);
 
 #ifdef CONFIG_EFI
-       /* Once setup is done above, unmap the EFI memory map on
-        * mismatched firmware/kernel archtectures since there is no
-        * support for runtime services.
-        */
-       if (efi_enabled(EFI_BOOT) && !efi_is_native()) {
-               pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n");
-               efi_unmap_memmap();
-       }
+       if (efi_enabled(EFI_BOOT))
+               efi_apply_memmap_quirks();
 #endif
 }
 

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 1a201ac7cef8a1f7f4ce5cff2a8f8dbc6b540c00..b97acecf3fd95667e2b67bba8f88bb80428480bb 100644 (file)
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -52,6 +52,7 @@
 #include <asm/tlbflush.h>
 #include <asm/x86_init.h>
 #include <asm/rtc.h>
+#include <asm/uv/uv.h>
 
 #define EFI_DEBUG
 
@@ -1210,3 +1211,22 @@ static int __init parse_efi_cmdline(char *str)
        return 0;
 }
 early_param("efi", parse_efi_cmdline);
+
+void __init efi_apply_memmap_quirks(void)
+{
+       /*
+        * Once setup is done earlier, unmap the EFI memory map on mismatched
+        * firmware/kernel architectures since there is no support for runtime
+        * services.
+        */
+       if (!efi_is_native()) {
+               pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n");
+               efi_unmap_memmap();
+       }
+
+       /*
+        * UV doesn't support the new EFI pagetable mapping yet.
+        */
+       if (is_uv_system())
+               set_bit(EFI_OLD_MEMMAP, &x86_efi_facility);
+}