X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=arch%2Fs390%2Fkernel%2Fearly.c;h=3b7e7dddc324a6985a09758ce9636da5e6cae8c6;hb=6d1f23f204c9e4638bd30ff3a768c47e40cd3ac0;hp=c00856ad4e5a15b00450322053914964122f7cf7;hpb=b74b953b998bcc2db91b694446f3a2619ec32de6;p=karo-tx-linux.git

diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index c00856ad4e5a..3b7e7dddc324 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -208,7 +208,8 @@ static noinline __init void init_kernel_storage_key(void)
 	end_pfn = PFN_UP(__pa(&_end));
 
 	for (init_pfn = 0 ; init_pfn < end_pfn; init_pfn++)
-		page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
+		page_set_storage_key(init_pfn << PAGE_SHIFT,
+				     PAGE_DEFAULT_KEY, 0);
 }
 
 static __initdata struct sysinfo_3_2_2 vmms __aligned(PAGE_SIZE);
@@ -255,13 +256,33 @@ static noinline __init void setup_lowcore_early(void)
 	s390_base_pgm_handler_fn = early_pgm_check_handler;
 }
 
+static noinline __init void setup_facility_list(void)
+{
+	unsigned long nr;
+
+	S390_lowcore.stfl_fac_list = 0;
+	asm volatile(
+		"	.insn	s,0xb2b10000,0(0)\n" /* stfl */
+		"0:\n"
+		EX_TABLE(0b,0b) : "=m" (S390_lowcore.stfl_fac_list));
+	memcpy(&S390_lowcore.stfle_fac_list, &S390_lowcore.stfl_fac_list, 4);
+	nr = 4;				/* # bytes stored by stfl */
+	if (test_facility(7)) {
+		/* More facility bits available with stfle */
+		register unsigned long reg0 asm("0") = MAX_FACILITY_BIT/64 - 1;
+		asm volatile(".insn s,0xb2b00000,%0" /* stfle */
+			     : "=m" (S390_lowcore.stfle_fac_list), "+d" (reg0)
+			     : : "cc");
+		nr = (reg0 + 1) * 8;	/* # bytes stored by stfle */
+	}
+	memset((char *) S390_lowcore.stfle_fac_list + nr, 0,
+	       MAX_FACILITY_BIT/8 - nr);
+}
+
 static noinline __init void setup_hpage(void)
 {
 #ifndef CONFIG_DEBUG_PAGEALLOC
-	unsigned int facilities;
-
-	facilities = stfl();
-	if (!(facilities & (1UL << 23)) || !(facilities & (1UL << 29)))
+	if (!test_facility(2) || !test_facility(8))
 		return;
 	S390_lowcore.machine_flags |= MACHINE_FLAG_HPAGE;
 	__ctl_set_bit(0, 23);
@@ -355,18 +376,15 @@ static __init void detect_diag44(void)
 static __init void detect_machine_facilities(void)
 {
 #ifdef CONFIG_64BIT
-	unsigned int facilities;
-	unsigned long long facility_bits;
-
-	facilities = stfl();
-	if (facilities & (1 << 28))
+	if (test_facility(3))
 		S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE;
-	if (facilities & (1 << 23))
+	if (test_facility(8))
 		S390_lowcore.machine_flags |= MACHINE_FLAG_PFMF;
-	if (facilities & (1 << 4))
+	if (test_facility(11))
+		S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY;
+	if (test_facility(27))
 		S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS;
-	if ((stfle(&facility_bits, 1) > 0) &&
-	    (facility_bits & (1ULL << (63 - 40))))
+	if (test_facility(40))
 		S390_lowcore.machine_flags |= MACHINE_FLAG_SPP;
 #endif
 }
@@ -447,6 +465,7 @@ void __init startup_init(void)
 	lockdep_off();
 	sort_main_extable();
 	setup_lowcore_early();
+	setup_facility_list();
 	detect_machine_type();
 	ipl_update_parameters();
 	setup_boot_command_line();