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-rw-r--r--arch/x86/kernel/setup.c27
1 files changed, 20 insertions, 7 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 468e98dfd44e..ca45696f30fb 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -921,18 +921,19 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_X86_64
if (max_pfn > max_low_pfn) {
int i;
- for (i = 0; i < e820.nr_map; i++) {
- struct e820entry *ei = &e820.map[i];
+ unsigned long start, end;
+ unsigned long start_pfn, end_pfn;
- if (ei->addr + ei->size <= 1UL << 32)
- continue;
+ for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn,
+ NULL) {
- if (ei->type == E820_RESERVED)
+ end = PFN_PHYS(end_pfn);
+ if (end <= (1UL<<32))
continue;
+ start = PFN_PHYS(start_pfn);
max_pfn_mapped = init_memory_mapping(
- ei->addr < 1UL << 32 ? 1UL << 32 : ei->addr,
- ei->addr + ei->size);
+ max((1UL<<32), start), end);
}
/* can we preseve max_low_pfn ?*/
@@ -1048,6 +1049,18 @@ void __init setup_arch(char **cmdline_p)
arch_init_ideal_nops();
register_refined_jiffies(CLOCK_TICK_RATE);
+
+#ifdef CONFIG_EFI
+ /* Once setup is done above, disable efi_enabled on mismatched
+ * firmware/kernel archtectures since there is no support for
+ * runtime services.
+ */
+ if (efi_enabled && IS_ENABLED(CONFIG_X86_64) != efi_64bit) {
+ pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n");
+ efi_unmap_memmap();
+ efi_enabled = 0;
+ }
+#endif
}
#ifdef CONFIG_X86_32
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