X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;ds=sidebyside;f=arch%2Fx86%2Fkernel%2Fmpparse.c;h=d7b6f7fb4fecfd44205d63ab6cfebfb400e8b21a;hb=3dc8d7f07e7496c0c6702e7e4b1acc179fa94019;hp=d86dbf7e54be4384aae5c2c886e3e690780f40f3;hpb=aaae5272118bcce90d11629f15bc01ea8e545e6d;p=karo-tx-linux.git

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index d86dbf7e54be..d7b6f7fb4fec 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -274,6 +274,18 @@ static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt)
 
 void __init default_smp_read_mpc_oem(struct mpc_table *mpc) { }
 
+static void __init smp_register_lapic_address(unsigned long address)
+{
+	mp_lapic_addr = address;
+
+	set_fixmap_nocache(FIX_APIC_BASE, address);
+	if (boot_cpu_physical_apicid == -1U) {
+		boot_cpu_physical_apicid  = read_apic_id();
+		apic_version[boot_cpu_physical_apicid] =
+			 GET_APIC_VERSION(apic_read(APIC_LVR));
+	}
+}
+
 static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
 {
 	char str[16];
@@ -295,6 +307,10 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
 	if (early)
 		return 1;
 
+	/* Initialize the lapic mapping */
+	if (!acpi_lapic)
+		smp_register_lapic_address(mpc->lapic);
+
 	if (mpc->oemptr)
 		x86_init.mpparse.smp_read_mpc_oem(mpc);