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[qemu-s390x] [kvm-unit-tests PATCH 4/5] s390x: Use interrupts in SCLP an
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From: |
Janosch Frank |
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Subject: |
[qemu-s390x] [kvm-unit-tests PATCH 4/5] s390x: Use interrupts in SCLP and add line mode |
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Date: |
Tue, 4 Dec 2018 14:48:37 +0100 |
z/VM isn't fond of vt220, so we need line mode when running under z/VM.
Also we need to properly implement interrupt handling for SCLP,
because on z/VM and LPAR SCLP calls are not synchronous!
Signed-off-by: Janosch Frank <address@hidden>
---
lib/s390x/asm/arch_def.h | 1 +
lib/s390x/asm/interrupt.h | 2 +
lib/s390x/interrupt.c | 12 ++-
lib/s390x/io.c | 2 +-
lib/s390x/sclp-ascii.c | 222 ++++++++++++++++++++++++++++++++++++++--------
lib/s390x/sclp.c | 42 +++++++++
lib/s390x/sclp.h | 71 ++++++++++++++-
7 files changed, 311 insertions(+), 41 deletions(-)
diff --git a/lib/s390x/asm/arch_def.h b/lib/s390x/asm/arch_def.h
index d2cd727..4bbb428 100644
--- a/lib/s390x/asm/arch_def.h
+++ b/lib/s390x/asm/arch_def.h
@@ -15,6 +15,7 @@ struct psw {
uint64_t addr;
};
+#define PSW_MASK_EXT 0x0100000000000000UL
#define PSW_MASK_DAT 0x0400000000000000UL
#define PSW_MASK_PSTATE 0x0001000000000000UL
diff --git a/lib/s390x/asm/interrupt.h b/lib/s390x/asm/interrupt.h
index 013709f..de15d9e 100644
--- a/lib/s390x/asm/interrupt.h
+++ b/lib/s390x/asm/interrupt.h
@@ -11,6 +11,8 @@
#define _ASMS390X_IRQ_H_
#include <asm/arch_def.h>
+#define EXT_IRQ_SERVICE_SIG 0x2401
+
void handle_pgm_int(void);
void handle_ext_int(void);
void handle_mcck_int(void);
diff --git a/lib/s390x/interrupt.c b/lib/s390x/interrupt.c
index cf0a794..7118577 100644
--- a/lib/s390x/interrupt.c
+++ b/lib/s390x/interrupt.c
@@ -12,6 +12,7 @@
#include <libcflat.h>
#include <asm/interrupt.h>
#include <asm/barrier.h>
+#include <sclp.h>
static bool pgm_int_expected;
static struct lowcore *lc;
@@ -107,8 +108,15 @@ void handle_pgm_int(void)
void handle_ext_int(void)
{
- report_abort("Unexpected external call interrupt: at %#lx",
- lc->ext_old_psw.addr);
+ if (lc->ext_int_code != EXT_IRQ_SERVICE_SIG)
+ report_abort("Unexpected external call interrupt: at %#lx",
+ lc->ext_old_psw.addr);
+ else {
+ lc->ext_old_psw.mask &= ~PSW_MASK_EXT;
+ lc->sw_int_cr0 &= ~(1UL << 9);
+ sclp_handle_ext();
+ lc->ext_int_code = 0;
+ }
}
void handle_mcck_int(void)
diff --git a/lib/s390x/io.c b/lib/s390x/io.c
index 7bca637..72041ed 100644
--- a/lib/s390x/io.c
+++ b/lib/s390x/io.c
@@ -44,8 +44,8 @@ void setup(void)
{
setup_args_progname(ipl_args);
setup_facilities();
- sclp_ascii_setup();
sclp_memory_setup();
+ sclp_ascii_setup();
}
void exit(int code)
diff --git a/lib/s390x/sclp-ascii.c b/lib/s390x/sclp-ascii.c
index 893ca17..5e23207 100644
--- a/lib/s390x/sclp-ascii.c
+++ b/lib/s390x/sclp-ascii.c
@@ -11,58 +11,206 @@
#include <libcflat.h>
#include <string.h>
#include <asm/page.h>
+#include <asm/arch_def.h>
+#include <asm/io.h>
#include "sclp.h"
-char _sccb[PAGE_SIZE] __attribute__((__aligned__(4096)));
-/* Perform service call. Return 0 on success, non-zero otherwise. */
-int sclp_service_call(unsigned int command, void *sccb)
+/*
+ * ASCII (IBM PC 437) -> EBCDIC 037
+ */
+static uint8_t _ascebc[256] =
{
- int cc;
+ /*00 NUL SOH STX ETX EOT ENQ ACK BEL */
+ 0x00, 0x01, 0x02, 0x03, 0x37, 0x2D, 0x2E, 0x2F,
+ /*08 BS HT LF VT FF CR SO SI */
+ /* ->NL */
+ 0x16, 0x05, 0x15, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
+ /*10 DLE DC1 DC2 DC3 DC4 NAK SYN ETB */
+ 0x10, 0x11, 0x12, 0x13, 0x3C, 0x3D, 0x32, 0x26,
+ /*18 CAN EM SUB ESC FS GS RS US */
+ /* ->IGS ->IRS ->IUS */
+ 0x18, 0x19, 0x3F, 0x27, 0x22, 0x1D, 0x1E, 0x1F,
+ /*20 SP ! " # $ % & ' */
+ 0x40, 0x5A, 0x7F, 0x7B, 0x5B, 0x6C, 0x50, 0x7D,
+ /*28 ( ) * + , - . / */
+ 0x4D, 0x5D, 0x5C, 0x4E, 0x6B, 0x60, 0x4B, 0x61,
+ /*30 0 1 2 3 4 5 6 7 */
+ 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
+ /*38 8 9 : ; < = > ? */
+ 0xF8, 0xF9, 0x7A, 0x5E, 0x4C, 0x7E, 0x6E, 0x6F,
+ /*40 @ A B C D E F G */
+ 0x7C, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
+ /*48 H I J K L M N O */
+ 0xC8, 0xC9, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6,
+ /*50 P Q R S T U V W */
+ 0xD7, 0xD8, 0xD9, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6,
+ /*58 X Y Z [ \ ] ^ _ */
+ 0xE7, 0xE8, 0xE9, 0xBA, 0xE0, 0xBB, 0xB0, 0x6D,
+ /*60 ` a b c d e f g */
+ 0x79, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+ /*68 h i j k l m n o */
+ 0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96,
+ /*70 p q r s t u v w */
+ 0x97, 0x98, 0x99, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
+ /*78 x y z { | } ~ DL */
+ 0xA7, 0xA8, 0xA9, 0xC0, 0x4F, 0xD0, 0xA1, 0x07,
+ /*80*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*88*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*90*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*98*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*A0*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*A8*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*B0*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*B8*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*C0*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*C8*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*D0*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*D8*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*E0 sz */
+ 0x3F, 0x59, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*E8*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*F0*/
+ 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F, 0x3F,
+ /*F8*/
+ 0x90, 0x3F, 0x3F, 0x3F, 0x3F, 0xEA, 0x3F, 0xFF
+};
- asm volatile(
- " .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */
- " ipm %0\n"
- " srl %0,28"
- : "=&d" (cc) : "d" (command), "a" (__pa(sccb))
- : "cc", "memory");
- if (cc == 3)
- return -1;
- if (cc == 2)
- return -1;
- return 0;
-}
+static bool initialized = false;
-static void sclp_set_write_mask(void)
-{
- WriteEventMask *sccb = (void *)_sccb;
-
- sccb->h.length = sizeof(WriteEventMask);
- sccb->mask_length = sizeof(unsigned int);
- sccb->receive_mask = SCLP_EVENT_MASK_MSG_ASCII;
- sccb->cp_receive_mask = SCLP_EVENT_MASK_MSG_ASCII;
- sccb->send_mask = SCLP_EVENT_MASK_MSG_ASCII;
- sccb->cp_send_mask = SCLP_EVENT_MASK_MSG_ASCII;
-
- sclp_service_call(SCLP_CMD_WRITE_EVENT_MASK, sccb);
-}
-
-void sclp_ascii_setup(void)
-{
- sclp_set_write_mask();
-}
-
-void sclp_print(const char *str)
+static void sclp_print_ascii(const char *str)
{
int len = strlen(str);
WriteEventData *sccb = (void *)_sccb;
+ while (sclp_busy)
+ /* Wait for SCLP request to complete */;
+ sclp_busy = true;
+ memset(sccb, 0, sizeof(*sccb));
sccb->h.length = sizeof(WriteEventData) + len;
sccb->h.function_code = SCLP_FC_NORMAL_WRITE;
sccb->ebh.length = sizeof(EventBufferHeader) + len;
sccb->ebh.type = SCLP_EVENT_ASCII_CONSOLE_DATA;
- sccb->ebh.flags = 0;
memcpy(sccb->data, str, len);
sclp_service_call(SCLP_CMD_WRITE_EVENT_DATA, sccb);
}
+
+static void sclp_print_lm(const char *str)
+{
+ unsigned char *ptr, *end, ch;
+ unsigned int count, offset, len;
+ struct write_sccb *sccb;
+ struct msg_buf *msg;
+ struct mdb *mdb;
+ struct mto *mto;
+ struct go *go;
+
+ while (sclp_busy)
+ /* Wait for SCLP request to complete */;
+ sclp_busy = true;
+ sccb = (struct write_sccb *) _sccb;
+ end = (unsigned char *) sccb + 4096 - 1;
+ memset(sccb, 0, sizeof(*sccb));
+ ptr = (unsigned char *) &sccb->msg.mdb.mto;
+ len = strlen(str);
+ offset = 0;
+ do {
+ for (count = sizeof(*mto); offset < len; count++) {
+ ch = str[offset++];
+ if ((ch == 0x0a) || (ptr + count > end))
+ break;
+ ptr[count] = _ascebc[ch];
+ }
+ mto = (struct mto *) ptr;
+ memset(mto, 0, sizeof(*mto));
+ mto->length = count;
+ mto->type = 4;
+ mto->line_type_flags = LNTPFLGS_ENDTEXT;
+ ptr += count;
+ } while ((offset < len) && (ptr + sizeof(*mto) <= end));
+ len = ptr - (unsigned char *) sccb;
+ sccb->header.length = len - offsetof(struct write_sccb, header);
+ msg = &sccb->msg;
+ msg->header.type = EVTYP_MSG;
+ msg->header.length = len - offsetof(struct write_sccb, msg.header);
+ mdb = &msg->mdb;
+ mdb->header.type = 1;
+ mdb->header.tag = 0xD4C4C240;
+ mdb->header.revision_code = 1;
+ mdb->header.length = len - offsetof(struct write_sccb, msg.mdb.header);
+ go = &mdb->go;
+ go->length = sizeof(*go);
+ go->type = 1;
+ sclp_service_call(SCLP_CMD_WRITE_EVENT_DATA, sccb);
+}
+
+/*
+ * SCLP needs to be initialized by setting a send and receive mask,
+ * indicating which messages the control program (we) want(s) to
+ * send/receive.
+ */
+static bool sclp_set_write_mask(void)
+{
+ WriteEventMask *sccb = (void *)_sccb;
+
+ while (sclp_busy)
+ /* Wait for SCLP request to complete */;
+ sclp_busy = true;
+ memset(_sccb, 0, sizeof(*sccb));
+ sccb->h.length = sizeof(WriteEventMask);
+ sccb->h.function_code = 0;
+ sccb->mask_length = sizeof(sccb_mask_t);
+
+ /* For now we don't process sclp input. */
+ sccb->cp_receive_mask = 0;
+ /* We send ASCII and line mode. */
+ sccb->cp_send_mask = SCLP_EVENT_MASK_MSG_ASCII | SCLP_EVENT_MASK_MSG;
+
+ sclp_service_call(SCLP_CMD_WRITE_EVENT_MASK, sccb);
+ while (sclp_busy) {
+ }
+ /* TODO: exit()? */
+ if (sccb->h.response_code != SCLP_RC_NORMAL_COMPLETION)
+ return false;
+ else {
+ initialized = true;
+ return true;
+ }
+}
+
+void sclp_ascii_setup(void)
+{
+ sclp_set_write_mask();
+}
+
+void sclp_print(const char *str)
+{
+ if (!initialized)
+ return;
+ /*
+ * z/VM advertises a vt220 console which is not functional:
+ * (response code 05F0, "not active because of the state of
+ * the machine"). Hence testing the masks would only work if
+ * we also use stsi data to distinguish z/VM.
+ *
+ * Let's rather print on all available consoles.
+ */
+ sclp_print_ascii(str);
+ sclp_print_lm(str);
+ while (sclp_busy)
+ /* Wait for SCLP request to complete */;
+}
diff --git a/lib/s390x/sclp.c b/lib/s390x/sclp.c
index 1d4a010..cd0e5e5 100644
--- a/lib/s390x/sclp.c
+++ b/lib/s390x/sclp.c
@@ -23,6 +23,9 @@ static uint64_t storage_increment_size;
static uint64_t max_ram_size;
static uint64_t ram_size;
+char _sccb[PAGE_SIZE] __attribute__((__aligned__(4096)));
+volatile bool sclp_busy = false;
+
static void mem_init(phys_addr_t mem_end)
{
phys_addr_t freemem_start = (phys_addr_t)&stacktop;
@@ -30,6 +33,42 @@ static void mem_init(phys_addr_t mem_end)
phys_alloc_init(freemem_start, mem_end - freemem_start);
}
+static void sclp_setup_int(void)
+{
+ uint64_t mask;
+
+ ctl_set_bit(0, 9);
+
+ mask = extract_psw_mask();
+ mask |= PSW_MASK_EXT;
+ load_psw_mask(mask);
+}
+
+void sclp_handle_ext(void)
+{
+ ctl_clear_bit(0, 9);
+ sclp_busy = false;
+}
+
+/* Perform service call. Return 0 on success, non-zero otherwise. */
+int sclp_service_call(unsigned int command, void *sccb)
+{
+ int cc;
+
+ sclp_setup_int();
+ asm volatile(
+ " .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */
+ " ipm %0\n"
+ " srl %0,28"
+ : "=&d" (cc) : "d" (command), "a" (__pa(sccb))
+ : "cc", "memory");
+ if (cc == 3)
+ return -1;
+ if (cc == 2)
+ return -1;
+ return 0;
+}
+
void sclp_memory_setup(void)
{
ReadInfo *ri = (void *)_sccb;
@@ -37,7 +76,10 @@ void sclp_memory_setup(void)
int cc;
ri->h.length = SCCB_SIZE;
+ sclp_busy = true;
sclp_service_call(SCLP_CMDW_READ_SCP_INFO_FORCED, ri);
+ while (sclp_busy)
+ /* Wait for SCLP request to complete */;
/* calculate the storage increment size */
rnsize = ri->rnsize;
diff --git a/lib/s390x/sclp.h b/lib/s390x/sclp.h
index 21d482b..f550afb 100644
--- a/lib/s390x/sclp.h
+++ b/lib/s390x/sclp.h
@@ -174,6 +174,7 @@ typedef struct SCCB {
/* SCLP event masks */
#define SCLP_EVENT_MASK_SIGNAL_QUIESCE 0x00000008
#define SCLP_EVENT_MASK_MSG_ASCII 0x00000040
+#define SCLP_EVENT_MASK_MSG 0x40000000
#define SCLP_UNCONDITIONAL_READ 0x00
#define SCLP_SELECTIVE_READ 0x01
@@ -207,9 +208,77 @@ typedef struct ReadEventData {
uint32_t mask;
} __attribute__((packed)) ReadEventData;
+#define MDBTYP_GO 0x0001
+#define MDBTYP_MTO 0x0004
+#define EVTYP_MSG 0x02
+#define LNTPFLGS_CNTLTEXT 0x8000
+#define LNTPFLGS_LABELTEXT 0x4000
+#define LNTPFLGS_DATATEXT 0x2000
+#define LNTPFLGS_ENDTEXT 0x1000
+#define LNTPFLGS_PROMPTTEXT 0x0800
+
+typedef uint32_t sccb_mask_t;
+
+/* SCLP line mode console related structures. */
+
+struct mto {
+ u16 length;
+ u16 type;
+ u16 line_type_flags;
+ u8 alarm_control;
+ u8 _reserved[3];
+} __attribute__((packed));
+
+struct go {
+ u16 length;
+ u16 type;
+ u32 domid;
+ u8 hhmmss_time[8];
+ u8 th_time[3];
+ u8 reserved_0;
+ u8 dddyyyy_date[7];
+ u8 _reserved_1;
+ u16 general_msg_flags;
+ u8 _reserved_2[10];
+ u8 originating_system_name[8];
+ u8 job_guest_name[8];
+} __attribute__((packed));
+
+struct mdb_header {
+ u16 length;
+ u16 type;
+ u32 tag;
+ u32 revision_code;
+} __attribute__((packed));
+
+struct mdb {
+ struct mdb_header header;
+ struct go go;
+ struct mto mto;
+} __attribute__((packed));
+
+struct evbuf_header {
+ u16 length;
+ u8 type;
+ u8 flags;
+ u16 _reserved;
+} __attribute__((packed));
+
+struct msg_buf {
+ struct evbuf_header header;
+ struct mdb mdb;
+} __attribute__((packed));
+
+struct write_sccb {
+ struct SCCBHeader header;
+ struct msg_buf msg;
+} __packed;
+
+extern char _sccb[];
+volatile bool sclp_busy;
+void sclp_handle_ext(void);
void sclp_ascii_setup(void);
void sclp_print(const char *str);
-extern char _sccb[];
int sclp_service_call(unsigned int command, void *sccb);
void sclp_memory_setup(void);
--
2.14.3
- [qemu-s390x] [kvm-unit-tests PATCH 1/5] s390x: Make tests bootable from disk, (continued)
[qemu-s390x] [kvm-unit-tests PATCH 2/5] s390x: Switch to z/Arch if needed, Janosch Frank, 2018/12/04
[qemu-s390x] [kvm-unit-tests PATCH 3/5] s390x: Add BSS clearing for non ELF boot, Janosch Frank, 2018/12/04
[qemu-s390x] [kvm-unit-tests PATCH 4/5] s390x: Use interrupts in SCLP and add line mode,
Janosch Frank <=
[qemu-s390x] [kvm-unit-tests PATCH 5/5] s390x: Fix sclp-ascii.c indents, Janosch Frank, 2018/12/04