From: Heiko Carstens <hca@linux.ibm.com>
Date: Fri, 7 Feb 2025 14:49:08 +0000 (+0100)
Subject: s390/vx: Convert cpu_has_vx() to cpu feature function
X-Git-Tag: v6.15-rc1~113^2~40
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=db14f78ecb02292e5013d7f46cf01be4d006262d;p=thirdparty%2Flinux.git

s390/vx: Convert cpu_has_vx() to cpu feature function

Instead of having a private cpu_has_vx() implementation use the new common
cpu feature method. Move the facility detection to the decompressor so it
matches all other cpu features.

Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---

diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c
index 9c4b2b317af26..98649e5049895 100644
--- a/arch/s390/boot/startup.c
+++ b/arch/s390/boot/startup.c
@@ -141,6 +141,8 @@ static void detect_facilities(void)
 		set_machine_feature(MFEATURE_TX);
 		local_ctl_set_bit(0, CR0_TRANSACTIONAL_EXECUTION_BIT);
 	}
+	if (cpu_has_vx())
+		local_ctl_set_bit(0, CR0_VECTOR_BIT);
 }
 
 static int cmma_test_essa(void)
diff --git a/arch/s390/include/asm/cpufeature.h b/arch/s390/include/asm/cpufeature.h
index 026a43b86fd72..781f45e88821c 100644
--- a/arch/s390/include/asm/cpufeature.h
+++ b/arch/s390/include/asm/cpufeature.h
@@ -31,5 +31,6 @@ int cpu_have_feature(unsigned int nr);
 #define cpu_has_seq_insn()	test_facility(85)
 #define cpu_has_tlb_lc()	test_facility(51)
 #define cpu_has_topology()	test_facility(11)
+#define cpu_has_vx()		test_facility(129)
 
 #endif /* __ASM_S390_CPUFEATURE_H */
diff --git a/arch/s390/include/asm/fpu.h b/arch/s390/include/asm/fpu.h
index c84cb33913e29..960c6c67ad6cf 100644
--- a/arch/s390/include/asm/fpu.h
+++ b/arch/s390/include/asm/fpu.h
@@ -44,6 +44,7 @@
 #ifndef _ASM_S390_FPU_H
 #define _ASM_S390_FPU_H
 
+#include <linux/cpufeature.h>
 #include <linux/processor.h>
 #include <linux/preempt.h>
 #include <linux/string.h>
@@ -51,12 +52,6 @@
 #include <asm/sigcontext.h>
 #include <asm/fpu-types.h>
 #include <asm/fpu-insn.h>
-#include <asm/facility.h>
-
-static inline bool cpu_has_vx(void)
-{
-	return likely(test_facility(129));
-}
 
 enum {
 	KERNEL_FPC_BIT = 0,
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index fc30eb222ee9f..081f67abe05ea 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -184,16 +184,10 @@ static noinline __init void setup_lowcore_early(void)
 	lc->return_mcck_lpswe = gen_lpswe(__LC_RETURN_MCCK_PSW);
 }
 
-static __init void detect_machine_facilities(void)
-{
-	if (test_facility(129))
-		system_ctl_set_bit(0, CR0_VECTOR_BIT);
-}
-
 static inline void save_vector_registers(void)
 {
 #ifdef CONFIG_CRASH_DUMP
-	if (test_facility(129))
+	if (cpu_has_vx())
 		save_vx_regs(boot_cpu_vector_save_area);
 #endif
 }
@@ -232,7 +226,6 @@ void __init startup_init(void)
 	setup_lowcore_early();
 	setup_arch_string();
 	setup_boot_command_line();
-	detect_machine_facilities();
 	save_vector_registers();
 	setup_topology();
 	sclp_early_detect();
diff --git a/lib/raid6/s390vx.uc b/lib/raid6/s390vx.uc
index 863e2d3209389..8aa53eb2f3958 100644
--- a/lib/raid6/s390vx.uc
+++ b/lib/raid6/s390vx.uc
@@ -11,6 +11,7 @@
  * This file is postprocessed using unroll.awk.
  */
 
+#include <linux/cpufeature.h>
 #include <linux/raid/pq.h>
 #include <asm/fpu.h>