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Diffstat (limited to 'arch/s390/include/asm/ap.h')
-rw-r--r--arch/s390/include/asm/ap.h436
1 files changed, 310 insertions, 126 deletions
diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h
index aea32dda3d14..43ac4a64f49b 100644
--- a/arch/s390/include/asm/ap.h
+++ b/arch/s390/include/asm/ap.h
@@ -12,6 +12,9 @@
#ifndef _ASM_S390_AP_H_
#define _ASM_S390_AP_H_
+#include <linux/io.h>
+#include <asm/asm-extable.h>
+
/**
* The ap_qid_t identifier of an ap queue.
* If the AP facilities test (APFT) facility is available,
@@ -40,10 +43,24 @@ struct ap_queue_status {
unsigned int queue_empty : 1;
unsigned int replies_waiting : 1;
unsigned int queue_full : 1;
- unsigned int _pad1 : 4;
+ unsigned int : 3;
+ unsigned int async : 1;
unsigned int irq_enabled : 1;
unsigned int response_code : 8;
- unsigned int _pad2 : 16;
+ unsigned int : 16;
+};
+
+/*
+ * AP queue status reg union to access the reg1
+ * register with the lower 32 bits comprising the
+ * ap queue status.
+ */
+union ap_queue_status_reg {
+ unsigned long value;
+ struct {
+ u32 _pad;
+ struct ap_queue_status status;
+ };
};
/**
@@ -53,54 +70,98 @@ struct ap_queue_status {
*/
static inline bool ap_instructions_available(void)
{
- register unsigned long reg0 asm ("0") = AP_MKQID(0, 0);
- register unsigned long reg1 asm ("1") = 0;
- register unsigned long reg2 asm ("2") = 0;
+ unsigned long reg0 = AP_MKQID(0, 0);
+ unsigned long reg1 = 0;
asm volatile(
- " .long 0xb2af0000\n" /* PQAP(TAPQ) */
- "0: la %0,1\n"
+ " lgr 0,%[reg0]\n" /* qid into gr0 */
+ " lghi 1,0\n" /* 0 into gr1 */
+ " lghi 2,0\n" /* 0 into gr2 */
+ " .insn rre,0xb2af0000,0,0\n" /* PQAP(TAPQ) */
+ "0: la %[reg1],1\n" /* 1 into reg1 */
"1:\n"
EX_TABLE(0b, 1b)
- : "+d" (reg1), "+d" (reg2)
- : "d" (reg0)
- : "cc");
+ : [reg1] "+&d" (reg1)
+ : [reg0] "d" (reg0)
+ : "cc", "0", "1", "2");
return reg1 != 0;
}
+/* TAPQ register GR2 response struct */
+struct ap_tapq_hwinfo {
+ union {
+ unsigned long value;
+ struct {
+ unsigned int fac : 32; /* facility bits */
+ unsigned int apinfo : 32; /* ap type, ... */
+ };
+ struct {
+ unsigned int apsc : 1; /* APSC */
+ unsigned int mex4k : 1; /* AP4KM */
+ unsigned int crt4k : 1; /* AP4KC */
+ unsigned int cca : 1; /* D */
+ unsigned int accel : 1; /* A */
+ unsigned int ep11 : 1; /* X */
+ unsigned int apxa : 1; /* APXA */
+ unsigned int : 1;
+ unsigned int class : 8;
+ unsigned int bs : 2; /* SE bind/assoc */
+ unsigned int : 14;
+ unsigned int at : 8; /* ap type */
+ unsigned int nd : 8; /* nr of domains */
+ unsigned int : 4;
+ unsigned int ml : 4; /* apxl ml */
+ unsigned int : 4;
+ unsigned int qd : 4; /* queue depth */
+ };
+ };
+};
+
+/*
+ * Convenience defines to be used with the bs field from struct ap_tapq_gr2
+ */
+#define AP_BS_Q_USABLE 0
+#define AP_BS_Q_USABLE_NO_SECURE_KEY 1
+#define AP_BS_Q_AVAIL_FOR_BINDING 2
+#define AP_BS_Q_UNUSABLE 3
+
/**
* ap_tapq(): Test adjunct processor queue.
* @qid: The AP queue number
- * @info: Pointer to queue descriptor
+ * @info: Pointer to tapq hwinfo struct
*
* Returns AP queue status structure.
*/
-static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info)
+static inline struct ap_queue_status ap_tapq(ap_qid_t qid,
+ struct ap_tapq_hwinfo *info)
{
- register unsigned long reg0 asm ("0") = qid;
- register struct ap_queue_status reg1 asm ("1");
- register unsigned long reg2 asm ("2");
-
- asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */
- : "=d" (reg1), "=d" (reg2)
- : "d" (reg0)
- : "cc");
+ union ap_queue_status_reg reg1;
+ unsigned long reg2;
+
+ asm volatile(
+ " lgr 0,%[qid]\n" /* qid into gr0 */
+ " lghi 2,0\n" /* 0 into gr2 */
+ " .insn rre,0xb2af0000,0,0\n" /* PQAP(TAPQ) */
+ " lgr %[reg1],1\n" /* gr1 (status) into reg1 */
+ " lgr %[reg2],2\n" /* gr2 into reg2 */
+ : [reg1] "=&d" (reg1.value), [reg2] "=&d" (reg2)
+ : [qid] "d" (qid)
+ : "cc", "0", "1", "2");
if (info)
- *info = reg2;
- return reg1;
+ info->value = reg2;
+ return reg1.status;
}
/**
* ap_test_queue(): Test adjunct processor queue.
* @qid: The AP queue number
* @tbit: Test facilities bit
- * @info: Pointer to queue descriptor
+ * @info: Ptr to tapq gr2 struct
*
* Returns AP queue status structure.
*/
-static inline struct ap_queue_status ap_test_queue(ap_qid_t qid,
- int tbit,
- unsigned long *info)
+static inline struct ap_queue_status ap_test_queue(ap_qid_t qid, int tbit,
+ struct ap_tapq_hwinfo *info)
{
if (tbit)
qid |= 1UL << 23; /* set T bit*/
@@ -110,39 +171,51 @@ static inline struct ap_queue_status ap_test_queue(ap_qid_t qid,
/**
* ap_pqap_rapq(): Reset adjunct processor queue.
* @qid: The AP queue number
+ * @fbit: if != 0 set F bit
*
* Returns AP queue status structure.
*/
-static inline struct ap_queue_status ap_rapq(ap_qid_t qid)
+static inline struct ap_queue_status ap_rapq(ap_qid_t qid, int fbit)
{
- register unsigned long reg0 asm ("0") = qid | (1UL << 24);
- register struct ap_queue_status reg1 asm ("1");
+ unsigned long reg0 = qid | (1UL << 24); /* fc 1UL is RAPQ */
+ union ap_queue_status_reg reg1;
+
+ if (fbit)
+ reg0 |= 1UL << 22;
asm volatile(
- ".long 0xb2af0000" /* PQAP(RAPQ) */
- : "=d" (reg1)
- : "d" (reg0)
- : "cc");
- return reg1;
+ " lgr 0,%[reg0]\n" /* qid arg into gr0 */
+ " .insn rre,0xb2af0000,0,0\n" /* PQAP(RAPQ) */
+ " lgr %[reg1],1\n" /* gr1 (status) into reg1 */
+ : [reg1] "=&d" (reg1.value)
+ : [reg0] "d" (reg0)
+ : "cc", "0", "1");
+ return reg1.status;
}
/**
* ap_pqap_zapq(): Reset and zeroize adjunct processor queue.
* @qid: The AP queue number
+ * @fbit: if != 0 set F bit
*
* Returns AP queue status structure.
*/
-static inline struct ap_queue_status ap_zapq(ap_qid_t qid)
+static inline struct ap_queue_status ap_zapq(ap_qid_t qid, int fbit)
{
- register unsigned long reg0 asm ("0") = qid | (2UL << 24);
- register struct ap_queue_status reg1 asm ("1");
+ unsigned long reg0 = qid | (2UL << 24); /* fc 2UL is ZAPQ */
+ union ap_queue_status_reg reg1;
+
+ if (fbit)
+ reg0 |= 1UL << 22;
asm volatile(
- ".long 0xb2af0000" /* PQAP(ZAPQ) */
- : "=d" (reg1)
- : "d" (reg0)
- : "cc");
- return reg1;
+ " lgr 0,%[reg0]\n" /* qid arg into gr0 */
+ " .insn rre,0xb2af0000,0,0\n" /* PQAP(ZAPQ) */
+ " lgr %[reg1],1\n" /* gr1 (status) into reg1 */
+ : [reg1] "=&d" (reg1.value)
+ : [reg0] "d" (reg0)
+ : "cc", "0", "1");
+ return reg1.status;
}
/**
@@ -154,15 +227,16 @@ struct ap_config_info {
unsigned int apxa : 1; /* N bit */
unsigned int qact : 1; /* C bit */
unsigned int rc8a : 1; /* R bit */
- unsigned char _reserved1 : 4;
- unsigned char _reserved2[3];
- unsigned char Na; /* max # of APs - 1 */
- unsigned char Nd; /* max # of Domains - 1 */
- unsigned char _reserved3[10];
+ unsigned int : 4;
+ unsigned int apsb : 1; /* B bit */
+ unsigned int : 23;
+ unsigned char na; /* max # of APs - 1 */
+ unsigned char nd; /* max # of Domains - 1 */
+ unsigned char _reserved0[10];
unsigned int apm[8]; /* AP ID mask */
unsigned int aqm[8]; /* AP (usage) queue mask */
unsigned int adm[8]; /* AP (control) domain mask */
- unsigned char _reserved4[16];
+ unsigned char _reserved1[16];
} __aligned(8);
/**
@@ -172,18 +246,20 @@ struct ap_config_info {
*/
static inline int ap_qci(struct ap_config_info *config)
{
- register unsigned long reg0 asm ("0") = 4UL << 24;
- register unsigned long reg1 asm ("1") = -EOPNOTSUPP;
- register struct ap_config_info *reg2 asm ("2") = config;
+ unsigned long reg0 = 4UL << 24; /* fc 4UL is QCI */
+ unsigned long reg1 = -EOPNOTSUPP;
+ struct ap_config_info *reg2 = config;
asm volatile(
- ".long 0xb2af0000\n" /* PQAP(QCI) */
- "0: la %0,0\n"
+ " lgr 0,%[reg0]\n" /* QCI fc into gr0 */
+ " lgr 2,%[reg2]\n" /* ptr to config into gr2 */
+ " .insn rre,0xb2af0000,0,0\n" /* PQAP(QCI) */
+ "0: la %[reg1],0\n" /* good case, QCI fc available */
"1:\n"
EX_TABLE(0b, 1b)
- : "+d" (reg1)
- : "d" (reg0), "d" (reg2)
- : "cc", "memory");
+ : [reg1] "+&d" (reg1)
+ : [reg0] "d" (reg0), [reg2] "d" (reg2)
+ : "cc", "memory", "0", "2");
return reg1;
}
@@ -194,47 +270,50 @@ static inline int ap_qci(struct ap_config_info *config)
* parameter to the PQAP(AQIC) instruction. For details please
* see the AR documentation.
*/
-struct ap_qirq_ctrl {
- unsigned int _res1 : 8;
- unsigned int zone : 8; /* zone info */
- unsigned int ir : 1; /* ir flag: enable (1) or disable (0) irq */
- unsigned int _res2 : 4;
- unsigned int gisc : 3; /* guest isc field */
- unsigned int _res3 : 6;
- unsigned int gf : 2; /* gisa format */
- unsigned int _res4 : 1;
- unsigned int gisa : 27; /* gisa origin */
- unsigned int _res5 : 1;
- unsigned int isc : 3; /* irq sub class */
+union ap_qirq_ctrl {
+ unsigned long value;
+ struct {
+ unsigned int : 8;
+ unsigned int zone : 8; /* zone info */
+ unsigned int ir : 1; /* ir flag: enable (1) or disable (0) irq */
+ unsigned int : 4;
+ unsigned int gisc : 3; /* guest isc field */
+ unsigned int : 6;
+ unsigned int gf : 2; /* gisa format */
+ unsigned int : 1;
+ unsigned int gisa : 27; /* gisa origin */
+ unsigned int : 1;
+ unsigned int isc : 3; /* irq sub class */
+ };
};
/**
* ap_aqic(): Control interruption for a specific AP.
* @qid: The AP queue number
* @qirqctrl: struct ap_qirq_ctrl (64 bit value)
- * @ind: The notification indicator byte
+ * @pa_ind: Physical address of the notification indicator byte
*
* Returns AP queue status.
*/
static inline struct ap_queue_status ap_aqic(ap_qid_t qid,
- struct ap_qirq_ctrl qirqctrl,
- void *ind)
+ union ap_qirq_ctrl qirqctrl,
+ phys_addr_t pa_ind)
{
- register unsigned long reg0 asm ("0") = qid | (3UL << 24);
- register union {
- unsigned long value;
- struct ap_qirq_ctrl qirqctrl;
- struct ap_queue_status status;
- } reg1 asm ("1");
- register void *reg2 asm ("2") = ind;
+ unsigned long reg0 = qid | (3UL << 24); /* fc 3UL is AQIC */
+ union ap_queue_status_reg reg1;
+ unsigned long reg2 = pa_ind;
- reg1.qirqctrl = qirqctrl;
+ reg1.value = qirqctrl.value;
asm volatile(
- ".long 0xb2af0000" /* PQAP(AQIC) */
- : "+d" (reg1)
- : "d" (reg0), "d" (reg2)
- : "cc");
+ " lgr 0,%[reg0]\n" /* qid param into gr0 */
+ " lgr 1,%[reg1]\n" /* irq ctrl into gr1 */
+ " lgr 2,%[reg2]\n" /* ni addr into gr2 */
+ " .insn rre,0xb2af0000,0,0\n" /* PQAP(AQIC) */
+ " lgr %[reg1],1\n" /* gr1 (status) into reg1 */
+ : [reg1] "+&d" (reg1.value)
+ : [reg0] "d" (reg0), [reg2] "d" (reg2)
+ : "cc", "memory", "0", "1", "2");
return reg1.status;
}
@@ -257,7 +336,7 @@ union ap_qact_ap_info {
};
/**
- * ap_qact(): Query AP combatibility type.
+ * ap_qact(): Query AP compatibility type.
* @qid: The AP queue number
* @apinfo: On input the info about the AP queue. On output the
* alternate AP queue info provided by the qact function
@@ -268,25 +347,78 @@ union ap_qact_ap_info {
static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,
union ap_qact_ap_info *apinfo)
{
- register unsigned long reg0 asm ("0") = qid | (5UL << 24)
- | ((ifbit & 0x01) << 22);
- register union {
- unsigned long value;
- struct ap_queue_status status;
- } reg1 asm ("1");
- register unsigned long reg2 asm ("2");
+ unsigned long reg0 = qid | (5UL << 24) | ((ifbit & 0x01) << 22);
+ union ap_queue_status_reg reg1;
+ unsigned long reg2;
reg1.value = apinfo->val;
asm volatile(
- ".long 0xb2af0000" /* PQAP(QACT) */
- : "+d" (reg1), "=d" (reg2)
- : "d" (reg0)
- : "cc");
+ " lgr 0,%[reg0]\n" /* qid param into gr0 */
+ " lgr 1,%[reg1]\n" /* qact in info into gr1 */
+ " .insn rre,0xb2af0000,0,0\n" /* PQAP(QACT) */
+ " lgr %[reg1],1\n" /* gr1 (status) into reg1 */
+ " lgr %[reg2],2\n" /* qact out info into reg2 */
+ : [reg1] "+&d" (reg1.value), [reg2] "=&d" (reg2)
+ : [reg0] "d" (reg0)
+ : "cc", "0", "1", "2");
apinfo->val = reg2;
return reg1.status;
}
+/*
+ * ap_bapq(): SE bind AP queue.
+ * @qid: The AP queue number
+ *
+ * Returns AP queue status structure.
+ *
+ * Invoking this function in a non-SE environment
+ * may case a specification exception.
+ */
+static inline struct ap_queue_status ap_bapq(ap_qid_t qid)
+{
+ unsigned long reg0 = qid | (7UL << 24); /* fc 7 is BAPQ */
+ union ap_queue_status_reg reg1;
+
+ asm volatile(
+ " lgr 0,%[reg0]\n" /* qid arg into gr0 */
+ " .insn rre,0xb2af0000,0,0\n" /* PQAP(BAPQ) */
+ " lgr %[reg1],1\n" /* gr1 (status) into reg1 */
+ : [reg1] "=&d" (reg1.value)
+ : [reg0] "d" (reg0)
+ : "cc", "0", "1");
+
+ return reg1.status;
+}
+
+/*
+ * ap_aapq(): SE associate AP queue.
+ * @qid: The AP queue number
+ * @sec_idx: The secret index
+ *
+ * Returns AP queue status structure.
+ *
+ * Invoking this function in a non-SE environment
+ * may case a specification exception.
+ */
+static inline struct ap_queue_status ap_aapq(ap_qid_t qid, unsigned int sec_idx)
+{
+ unsigned long reg0 = qid | (8UL << 24); /* fc 8 is AAPQ */
+ unsigned long reg2 = sec_idx;
+ union ap_queue_status_reg reg1;
+
+ asm volatile(
+ " lgr 0,%[reg0]\n" /* qid arg into gr0 */
+ " lgr 2,%[reg2]\n" /* secret index into gr2 */
+ " .insn rre,0xb2af0000,0,0\n" /* PQAP(AAPQ) */
+ " lgr %[reg1],1\n" /* gr1 (status) into reg1 */
+ : [reg1] "=&d" (reg1.value)
+ : [reg0] "d" (reg0), [reg2] "d" (reg2)
+ : "cc", "0", "1", "2");
+
+ return reg1.status;
+}
+
/**
* ap_nqap(): Send message to adjunct processor queue.
* @qid: The AP queue number
@@ -303,28 +435,36 @@ static inline struct ap_queue_status ap_nqap(ap_qid_t qid,
unsigned long long psmid,
void *msg, size_t length)
{
- register unsigned long reg0 asm ("0") = qid | 0x40000000UL;
- register struct ap_queue_status reg1 asm ("1");
- register unsigned long reg2 asm ("2") = (unsigned long) msg;
- register unsigned long reg3 asm ("3") = (unsigned long) length;
- register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32);
- register unsigned long reg5 asm ("5") = psmid & 0xffffffff;
+ unsigned long reg0 = qid | 0x40000000UL; /* 0x4... is last msg part */
+ union register_pair nqap_r1, nqap_r2;
+ union ap_queue_status_reg reg1;
+
+ nqap_r1.even = (unsigned int)(psmid >> 32);
+ nqap_r1.odd = psmid & 0xffffffff;
+ nqap_r2.even = (unsigned long)msg;
+ nqap_r2.odd = (unsigned long)length;
asm volatile (
- "0: .long 0xb2ad0042\n" /* NQAP */
- " brc 2,0b"
- : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3)
- : "d" (reg4), "d" (reg5)
- : "cc", "memory");
- return reg1;
+ " lgr 0,%[reg0]\n" /* qid param in gr0 */
+ "0: .insn rre,0xb2ad0000,%[nqap_r1],%[nqap_r2]\n"
+ " brc 2,0b\n" /* handle partial completion */
+ " lgr %[reg1],1\n" /* gr1 (status) into reg1 */
+ : [reg0] "+&d" (reg0), [reg1] "=&d" (reg1.value),
+ [nqap_r2] "+&d" (nqap_r2.pair)
+ : [nqap_r1] "d" (nqap_r1.pair)
+ : "cc", "memory", "0", "1");
+ return reg1.status;
}
/**
* ap_dqap(): Receive message from adjunct processor queue.
* @qid: The AP queue number
* @psmid: Pointer to program supplied message identifier
- * @msg: The message text
- * @length: The message length
+ * @msg: Pointer to message buffer
+ * @msglen: Message buffer size
+ * @length: Pointer to length of actually written bytes
+ * @reslength: Residual length on return
+ * @resgr0: input: gr0 value (only used if != 0), output: residual gr0 content
*
* Returns AP queue status structure.
* Condition code 1 on DQAP means the receive has taken place
@@ -336,28 +476,72 @@ static inline struct ap_queue_status ap_nqap(ap_qid_t qid,
* Note that gpr2 is used by the DQAP instruction to keep track of
* any 'residual' length, in case the instruction gets interrupted.
* Hence it gets zeroed before the instruction.
+ * If the message does not fit into the buffer, this function will
+ * return with a truncated message and the reply in the firmware queue
+ * is not removed. This is indicated to the caller with an
+ * ap_queue_status response_code value of all bits on (0xFF) and (if
+ * the reslength ptr is given) the remaining length is stored in
+ * *reslength and (if the resgr0 ptr is given) the updated gr0 value
+ * for further processing of this msg entry is stored in *resgr0. The
+ * caller needs to detect this situation and should invoke ap_dqap
+ * with a valid resgr0 ptr and a value in there != 0 to indicate that
+ * *resgr0 is to be used instead of qid to further process this entry.
*/
static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
- unsigned long long *psmid,
- void *msg, size_t length)
+ unsigned long *psmid,
+ void *msg, size_t msglen,
+ size_t *length,
+ size_t *reslength,
+ unsigned long *resgr0)
{
- register unsigned long reg0 asm("0") = qid | 0x80000000UL;
- register struct ap_queue_status reg1 asm ("1");
- register unsigned long reg2 asm("2") = 0UL;
- register unsigned long reg4 asm("4") = (unsigned long) msg;
- register unsigned long reg5 asm("5") = (unsigned long) length;
- register unsigned long reg6 asm("6") = 0UL;
- register unsigned long reg7 asm("7") = 0UL;
+ unsigned long reg0 = resgr0 && *resgr0 ? *resgr0 : qid | 0x80000000UL;
+ union ap_queue_status_reg reg1;
+ unsigned long reg2;
+ union register_pair rp1, rp2;
+ rp1.even = 0UL;
+ rp1.odd = 0UL;
+ rp2.even = (unsigned long)msg;
+ rp2.odd = (unsigned long)msglen;
asm volatile(
- "0: .long 0xb2ae0064\n" /* DQAP */
- " brc 6,0b\n"
- : "+d" (reg0), "=d" (reg1), "+d" (reg2),
- "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7)
- : : "cc", "memory");
- *psmid = (((unsigned long long) reg6) << 32) + reg7;
- return reg1;
+ " lgr 0,%[reg0]\n" /* qid param into gr0 */
+ " lghi 2,0\n" /* 0 into gr2 (res length) */
+ "0: ltgr %N[rp2],%N[rp2]\n" /* check buf len */
+ " jz 2f\n" /* go out if buf len is 0 */
+ "1: .insn rre,0xb2ae0000,%[rp1],%[rp2]\n"
+ " brc 6,0b\n" /* handle partial complete */
+ "2: lgr %[reg0],0\n" /* gr0 (qid + info) into reg0 */
+ " lgr %[reg1],1\n" /* gr1 (status) into reg1 */
+ " lgr %[reg2],2\n" /* gr2 (res length) into reg2 */
+ : [reg0] "+&d" (reg0), [reg1] "=&d" (reg1.value),
+ [reg2] "=&d" (reg2), [rp1] "+&d" (rp1.pair),
+ [rp2] "+&d" (rp2.pair)
+ :
+ : "cc", "memory", "0", "1", "2");
+
+ if (reslength)
+ *reslength = reg2;
+ if (reg2 != 0 && rp2.odd == 0) {
+ /*
+ * Partially complete, status in gr1 is not set.
+ * Signal the caller that this dqap is only partially received
+ * with a special status response code 0xFF and *resgr0 updated
+ */
+ reg1.status.response_code = 0xFF;
+ if (resgr0)
+ *resgr0 = reg0;
+ } else {
+ *psmid = (rp1.even << 32) + rp1.odd;
+ if (resgr0)
+ *resgr0 = 0;
+ }
+
+ /* update *length with the nr of bytes stored into the msg buffer */
+ if (length)
+ *length = msglen - rp2.odd;
+
+ return reg1.status;
}
/*
@@ -368,7 +552,7 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
#if IS_ENABLED(CONFIG_ZCRYPT)
void ap_bus_cfg_chg(void);
#else
-static inline void ap_bus_cfg_chg(void){};
+static inline void ap_bus_cfg_chg(void){}
#endif
#endif /* _ASM_S390_AP_H_ */