Merge branch 'x86-amd-nb-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[cascardo/linux.git] / arch / x86 / kernel / setup.c

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index df172c1..ed95652 100644 (file)
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -501,7 +501,18 @@ static inline unsigned long long get_total_mem(void)
        return total << PAGE_SHIFT;
 }
 
-#define DEFAULT_BZIMAGE_ADDR_MAX 0x37FFFFFF
+/*
+ * Keep the crash kernel below this limit.  On 32 bits earlier kernels
+ * would limit the kernel to the low 512 MiB due to mapping restrictions.
+ * On 64 bits, kexec-tools currently limits us to 896 MiB; increase this
+ * limit once kexec-tools are fixed.
+ */
+#ifdef CONFIG_X86_32
+# define CRASH_KERNEL_ADDR_MAX (512 << 20)
+#else
+# define CRASH_KERNEL_ADDR_MAX (896 << 20)
+#endif
+
 static void __init reserve_crashkernel(void)
 {
        unsigned long long total_mem;
@@ -520,10 +531,10 @@ static void __init reserve_crashkernel(void)
                const unsigned long long alignment = 16<<20;    /* 16M */
 
                /*
-                *  kexec want bzImage is below DEFAULT_BZIMAGE_ADDR_MAX
+                *  kexec want bzImage is below CRASH_KERNEL_ADDR_MAX
                 */
                crash_base = memblock_find_in_range(alignment,
-                              DEFAULT_BZIMAGE_ADDR_MAX, crash_size, alignment);
+                              CRASH_KERNEL_ADDR_MAX, crash_size, alignment);
 
                if (crash_base == MEMBLOCK_ERROR) {
                        pr_info("crashkernel reservation failed - No suitable area found.\n");
@@ -769,7 +780,6 @@ void __init setup_arch(char **cmdline_p)
 
        x86_init.oem.arch_setup();
 
-       resource_alloc_from_bottom = 0;
        iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
        setup_memory_map();
        parse_setup_data();