obj-y = s390-virtio-bus.o s390-virtio.o
obj-y := $(addprefix ../,$(obj-y))
+obj-y += sclp.o
--- /dev/null
+/*
+ * SCLP Support
+ *
+ * Copyright IBM, Corp. 2012
+ *
+ * Authors:
+ * Christian Borntraeger <borntraeger@de.ibm.com>
+ * Heinz Graalfs <graalfs@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at your
+ * option) any later version. See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "cpu.h"
+#include "kvm.h"
+#include "memory.h"
+
+#include "sclp.h"
+
+/* Provide information about the configuration, CPUs and storage */
+static void read_SCP_info(SCCB *sccb)
+{
+ ReadInfo *read_info = (ReadInfo *) sccb;
+ int shift = 0;
+
+ while ((ram_size >> (20 + shift)) > 65535) {
+ shift++;
+ }
+ read_info->rnmax = cpu_to_be16(ram_size >> (20 + shift));
+ read_info->rnsize = 1 << shift;
+ sccb->h.response_code = cpu_to_be16(SCLP_RC_NORMAL_READ_COMPLETION);
+}
+
+static void sclp_execute(SCCB *sccb, uint64_t code)
+{
+ switch (code) {
+ case SCLP_CMDW_READ_SCP_INFO:
+ case SCLP_CMDW_READ_SCP_INFO_FORCED:
+ read_SCP_info(sccb);
+ break;
+ default:
+ sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND);
+ break;
+ }
+}
+
+int sclp_service_call(uint32_t sccb, uint64_t code)
+{
+ int r = 0;
+ SCCB work_sccb;
+
+ hwaddr sccb_len = sizeof(SCCB);
+
+ /* first some basic checks on program checks */
+ if (cpu_physical_memory_is_io(sccb)) {
+ r = -PGM_ADDRESSING;
+ goto out;
+ }
+ if (sccb & ~0x7ffffff8ul) {
+ r = -PGM_SPECIFICATION;
+ goto out;
+ }
+
+ /*
+ * we want to work on a private copy of the sccb, to prevent guests
+ * from playing dirty tricks by modifying the memory content after
+ * the host has checked the values
+ */
+ cpu_physical_memory_read(sccb, &work_sccb, sccb_len);
+
+ /* Valid sccb sizes */
+ if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader) ||
+ be16_to_cpu(work_sccb.h.length) > SCCB_SIZE) {
+ r = -PGM_SPECIFICATION;
+ goto out;
+ }
+
+ sclp_execute((SCCB *)&work_sccb, code);
+
+ cpu_physical_memory_write(sccb, &work_sccb,
+ be16_to_cpu(work_sccb.h.length));
+
+ sclp_service_interrupt(sccb);
+
+out:
+ return r;
+}
+
+void sclp_service_interrupt(uint32_t sccb)
+{
+ s390_sclp_extint(sccb & ~3);
+}
+
+/* qemu object creation and initialization functions */
+
+static void s390_sclp_device_class_init(ObjectClass *klass, void *data)
+{
+ SysBusDeviceClass *dc = SYS_BUS_DEVICE_CLASS(klass);
+
+ dc->init = s390_sclp_dev_init;
+}
+
+static TypeInfo s390_sclp_device_info = {
+ .name = TYPE_DEVICE_S390_SCLP,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(S390SCLPDevice),
+ .class_init = s390_sclp_device_class_init,
+ .class_size = sizeof(S390SCLPDeviceClass),
+ .abstract = true,
+};
+
+static void s390_sclp_register_types(void)
+{
+ type_register_static(&s390_sclp_device_info);
+}
+
+type_init(s390_sclp_register_types)
--- /dev/null
+/*
+ * SCLP Support
+ *
+ * Copyright IBM, Corp. 2012
+ *
+ * Authors:
+ * Christian Borntraeger <borntraeger@de.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at your
+ * option) any later version. See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef HW_S390_SCLP_H
+#define HW_S390_SCLP_H
+
+#include <hw/sysbus.h>
+#include <hw/qdev.h>
+
+/* SCLP command codes */
+#define SCLP_CMDW_READ_SCP_INFO 0x00020001
+#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
+
+/* SCLP response codes */
+#define SCLP_RC_NORMAL_READ_COMPLETION 0x0010
+#define SCLP_RC_INVALID_SCLP_COMMAND 0x01f0
+
+/* Service Call Control Block (SCCB) and its elements */
+
+#define SCCB_SIZE 4096
+
+/*
+ * Normally packed structures are not the right thing to do, since all code
+ * must take care of endianess. We cant use ldl_phys and friends for two
+ * reasons, though:
+ * - some of the embedded structures below the SCCB can appear multiple times
+ * at different locations, so there is no fixed offset
+ * - we work on a private copy of the SCCB, since there are several length
+ * fields, that would cause a security nightmare if we allow the guest to
+ * alter the structure while we parse it. We cannot use ldl_p and friends
+ * either without doing pointer arithmetics
+ * So we have to double check that all users of sclp data structures use the
+ * right endianess wrappers.
+ */
+typedef struct SCCBHeader {
+ uint16_t length;
+ uint8_t function_code;
+ uint8_t control_mask[3];
+ uint16_t response_code;
+} QEMU_PACKED SCCBHeader;
+
+#define SCCB_DATA_LEN (SCCB_SIZE - sizeof(SCCBHeader))
+
+typedef struct ReadInfo {
+ SCCBHeader h;
+ uint16_t rnmax;
+ uint8_t rnsize;
+} QEMU_PACKED ReadInfo;
+
+typedef struct SCCB {
+ SCCBHeader h;
+ char data[SCCB_DATA_LEN];
+ } QEMU_PACKED SCCB;
+
+typedef struct S390SCLPDevice {
+ SysBusDevice busdev;
+} S390SCLPDevice;
+
+typedef struct S390SCLPDeviceClass {
+ DeviceClass qdev;
+ int (*init)(S390SCLPDevice *sdev);
+} S390SCLPDeviceClass;
+
+void sclp_service_interrupt(uint32_t sccb);
+
+#endif
return cc_names[cc_op];
}
-/* SCLP PV interface defines */
-#define SCLP_CMDW_READ_SCP_INFO 0x00020001
-#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
-
-#define SCP_LENGTH 0x00
-#define SCP_FUNCTION_CODE 0x02
-#define SCP_CONTROL_MASK 0x03
-#define SCP_RESPONSE_CODE 0x06
-#define SCP_MEM_CODE 0x08
-#define SCP_INCREMENT 0x0a
-
typedef struct LowCore
{
/* prefix area: defined by architecture */
void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr);
int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
target_ulong *raddr, int *flags);
-int sclp_service_call(CPUS390XState *env, uint32_t sccb, uint64_t code);
+int sclp_service_call(uint32_t sccb, uint64_t code);
uint32_t calc_cc(CPUS390XState *env, uint32_t cc_op, uint64_t src, uint64_t dst,
uint64_t vr);
#define SIGP_STORE_STATUS_ADDR 0x0e
#define SIGP_SET_ARCH 0x12
-#define SCLP_CMDW_READ_SCP_INFO 0x00020001
-#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
-
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
KVM_CAP_LAST_INFO
};
sccb = env->regs[ipbh0 & 0xf];
code = env->regs[(ipbh0 & 0xf0) >> 4];
- r = sclp_service_call(env, sccb, code);
+ r = sclp_service_call(sccb, code);
if (r < 0) {
enter_pgmcheck(env, -r);
}
}
}
-/*
- * ret < 0 indicates program check, ret = 0, 1, 2, 3 -> cc
- */
-int sclp_service_call(CPUS390XState *env, uint32_t sccb, uint64_t code)
-{
- int r = 0;
- int shift = 0;
-
-#ifdef DEBUG_HELPER
- printf("sclp(0x%x, 0x%" PRIx64 ")\n", sccb, code);
-#endif
-
- /* basic checks */
- if (cpu_physical_memory_is_io(sccb)) {
- return -PGM_ADDRESSING;
- }
- if (sccb & ~0x7ffffff8ul) {
- return -PGM_SPECIFICATION;
- }
-
- switch (code) {
- case SCLP_CMDW_READ_SCP_INFO:
- case SCLP_CMDW_READ_SCP_INFO_FORCED:
- while ((ram_size >> (20 + shift)) > 65535) {
- shift++;
- }
- stw_phys(sccb + SCP_MEM_CODE, ram_size >> (20 + shift));
- stb_phys(sccb + SCP_INCREMENT, 1 << shift);
- stw_phys(sccb + SCP_RESPONSE_CODE, 0x10);
-
- s390_sclp_extint(sccb & ~3);
- break;
- default:
-#ifdef DEBUG_HELPER
- printf("KVM: invalid sclp call 0x%x / 0x%" PRIx64 "x\n", sccb, code);
-#endif
- r = 3;
- break;
- }
-
- return r;
-}
-
/* SCLP service call */
uint32_t HELPER(servc)(CPUS390XState *env, uint32_t r1, uint64_t r2)
{
int r;
- r = sclp_service_call(env, r1, r2);
+ r = sclp_service_call(r1, r2);
if (r < 0) {
program_interrupt(env, -r, 4);
return 0;
projects / sdk / emulator / qemu.git / commitdiff