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diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h
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+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Adjunct processor (AP) interfaces
+ *
+ * Copyright IBM Corp. 2017
+ *
+ * Author(s): Tony Krowiak <akrowia@linux.vnet.ibm.com>
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Harald Freudenberger <freude@de.ibm.com>
+ */
+
+#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,
+ * card and queue index are 8 bit values, otherwise
+ * card index is 6 bit and queue index a 4 bit value.
+ */
+typedef unsigned int ap_qid_t;
+
+#define AP_MKQID(_card, _queue) (((_card) & 0xff) << 8 | ((_queue) & 0xff))
+#define AP_QID_CARD(_qid) (((_qid) >> 8) & 0xff)
+#define AP_QID_QUEUE(_qid) ((_qid) & 0xff)
+
+/**
+ * struct ap_queue_status - Holds the AP queue status.
+ * @queue_empty: Shows if queue is empty
+ * @replies_waiting: Waiting replies
+ * @queue_full: Is 1 if the queue is full
+ * @irq_enabled: Shows if interrupts are enabled for the AP
+ * @response_code: Holds the 8 bit response code
+ *
+ * The ap queue status word is returned by all three AP functions
+ * (PQAP, NQAP and DQAP). There's a set of flags in the first
+ * byte, followed by a 1 byte response code.
+ */
+struct ap_queue_status {
+ unsigned int queue_empty : 1;
+ unsigned int replies_waiting : 1;
+ unsigned int queue_full : 1;
+ unsigned int : 3;
+ unsigned int async : 1;
+ unsigned int irq_enabled : 1;
+ unsigned int response_code : 8;
+ 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;
+ };
+};
+
+/**
+ * ap_intructions_available() - Test if AP instructions are available.
+ *
+ * Returns true if the AP instructions are installed, otherwise false.
+ */
+static inline bool ap_instructions_available(void)
+{
+ unsigned long reg0 = AP_MKQID(0, 0);
+ unsigned long reg1 = 0;
+
+ asm volatile(
+ " 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)
+ : [reg1] "+&d" (reg1)
+ : [reg0] "d" (reg0)
+ : "cc", "0", "1", "2");
+ return reg1 != 0;
+}
+
+/* TAPQ register GR2 response struct */
+struct ap_tapq_gr2 {
+ union {
+ unsigned long value;
+ struct {
+ unsigned int fac : 32; /* facility bits */
+ unsigned int apinfo : 32; /* ap type, ... */
+ };
+ struct {
+ unsigned int s : 1; /* APSC */
+ unsigned int m : 1; /* AP4KM */
+ unsigned int c : 1; /* AP4KC */
+ unsigned int mode : 3;
+ unsigned int n : 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
+ *
+ * Returns AP queue status structure.
+ */
+static inline struct ap_queue_status ap_tapq(ap_qid_t qid, struct ap_tapq_gr2 *info)
+{
+ 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->value = reg2;
+ return reg1.status;
+}
+
+/**
+ * ap_test_queue(): Test adjunct processor queue.
+ * @qid: The AP queue number
+ * @tbit: Test facilities bit
+ * @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,
+ struct ap_tapq_gr2 *info)
+{
+ if (tbit)
+ qid |= 1UL << 23; /* set T bit*/
+ return ap_tapq(qid, info);
+}
+
+/**
+ * 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, int fbit)
+{
+ unsigned long reg0 = qid | (1UL << 24); /* fc 1UL is RAPQ */
+ union ap_queue_status_reg reg1;
+
+ if (fbit)
+ reg0 |= 1UL << 22;
+
+ asm volatile(
+ " 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, int fbit)
+{
+ unsigned long reg0 = qid | (2UL << 24); /* fc 2UL is ZAPQ */
+ union ap_queue_status_reg reg1;
+
+ if (fbit)
+ reg0 |= 1UL << 22;
+
+ asm volatile(
+ " 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;
+}
+
+/**
+ * struct ap_config_info - convenience struct for AP crypto
+ * config info as returned by the ap_qci() function.
+ */
+struct ap_config_info {
+ unsigned int apsc : 1; /* S bit */
+ unsigned int apxa : 1; /* N bit */
+ unsigned int qact : 1; /* C bit */
+ unsigned int rc8a : 1; /* R bit */
+ 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 _reserved1[16];
+} __aligned(8);
+
+/**
+ * ap_qci(): Get AP configuration data
+ *
+ * Returns 0 on success, or -EOPNOTSUPP.
+ */
+static inline int ap_qci(struct ap_config_info *config)
+{
+ unsigned long reg0 = 4UL << 24; /* fc 4UL is QCI */
+ unsigned long reg1 = -EOPNOTSUPP;
+ struct ap_config_info *reg2 = config;
+
+ asm volatile(
+ " 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)
+ : [reg1] "+&d" (reg1)
+ : [reg0] "d" (reg0), [reg2] "d" (reg2)
+ : "cc", "memory", "0", "2");
+
+ return reg1;
+}
+
+/*
+ * struct ap_qirq_ctrl - convenient struct for easy invocation
+ * of the ap_aqic() function. This struct is passed as GR1
+ * parameter to the PQAP(AQIC) instruction. For details please
+ * see the AR documentation.
+ */
+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)
+ * @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,
+ union ap_qirq_ctrl qirqctrl,
+ phys_addr_t pa_ind)
+{
+ unsigned long reg0 = qid | (3UL << 24); /* fc 3UL is AQIC */
+ union ap_queue_status_reg reg1;
+ unsigned long reg2 = pa_ind;
+
+ reg1.value = qirqctrl.value;
+
+ asm volatile(
+ " 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;
+}
+
+/*
+ * union ap_qact_ap_info - used together with the
+ * ap_aqic() function to provide a convenient way
+ * to handle the ap info needed by the qact function.
+ */
+union ap_qact_ap_info {
+ unsigned long val;
+ struct {
+ unsigned int : 3;
+ unsigned int mode : 3;
+ unsigned int : 26;
+ unsigned int cat : 8;
+ unsigned int : 8;
+ unsigned char ver[2];
+ };
+};
+
+/**
+ * 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
+ * in GR2 is stored in.
+ *
+ * Returns AP queue status. Check response_code field for failures.
+ */
+static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,
+ union ap_qact_ap_info *apinfo)
+{
+ unsigned long reg0 = qid | (5UL << 24) | ((ifbit & 0x01) << 22);
+ union ap_queue_status_reg reg1;
+ unsigned long reg2;
+
+ reg1.value = apinfo->val;
+
+ asm volatile(
+ " 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
+ * @psmid: The program supplied message identifier
+ * @msg: The message text
+ * @length: The message length
+ *
+ * Returns AP queue status structure.
+ * Condition code 1 on NQAP can't happen because the L bit is 1.
+ * Condition code 2 on NQAP also means the send is incomplete,
+ * because a segment boundary was reached. The NQAP is repeated.
+ */
+static inline struct ap_queue_status ap_nqap(ap_qid_t qid,
+ unsigned long long psmid,
+ void *msg, size_t length)
+{
+ 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 (
+ " 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: 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
+ * but only partially. The response is incomplete, hence the
+ * DQAP is repeated.
+ * Condition code 2 on DQAP also means the receive is incomplete,
+ * this time because a segment boundary was reached. Again, the
+ * DQAP is repeated.
+ * 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 *psmid,
+ void *msg, size_t msglen,
+ size_t *length,
+ size_t *reslength,
+ unsigned long *resgr0)
+{
+ 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(
+ " 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;
+}
+
+/*
+ * Interface to tell the AP bus code that a configuration
+ * change has happened. The bus code should at least do
+ * an ap bus resource rescan.
+ */
+#if IS_ENABLED(CONFIG_ZCRYPT)
+void ap_bus_cfg_chg(void);
+#else
+static inline void ap_bus_cfg_chg(void){}
+#endif
+
+#endif /* _ASM_S390_AP_H_ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 21:05:03 +0000