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-rw-r--r--arch/x86/kernel/apic/x2apic_phys.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index e03a1e180e81..562a76d433c8 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -20,18 +20,19 @@ static int set_x2apic_phys_mode(char *arg)
20} 20}
21early_param("x2apic_phys", set_x2apic_phys_mode); 21early_param("x2apic_phys", set_x2apic_phys_mode);
22 22
23static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id) 23static bool x2apic_fadt_phys(void)
24{ 24{
25 if (x2apic_phys) 25 if ((acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) &&
26 return x2apic_enabled(); 26 (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
27 else if ((acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) &&
28 (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL) &&
29 x2apic_enabled()) {
30 printk(KERN_DEBUG "System requires x2apic physical mode\n"); 27 printk(KERN_DEBUG "System requires x2apic physical mode\n");
31 return 1; 28 return true;
32 } 29 }
33 else 30 return false;
34 return 0; 31}
32
33static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
34{
35 return x2apic_enabled() && (x2apic_phys || x2apic_fadt_phys());
35} 36}
36 37
37static void 38static void
@@ -82,7 +83,7 @@ static void init_x2apic_ldr(void)
82 83
83static int x2apic_phys_probe(void) 84static int x2apic_phys_probe(void)
84{ 85{
85 if (x2apic_mode && x2apic_phys) 86 if (x2apic_mode && (x2apic_phys || x2apic_fadt_phys()))
86 return 1; 87 return 1;
87 88
88 return apic == &apic_x2apic_phys; 89 return apic == &apic_x2apic_phys;