s390: implement pci instructions

This patch implements the s390 pci instructions in qemu. It allows
to access and drive pci devices attached to the s390 pci bus.
Because of platform constrains devices using IO BARs are not
supported. Also a device has to support MSI/MSI-X to run on s390.

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

hw/s390x/Makefile.objs

@@ -8,4 +8,4 @@ obj-y += ipl.o
 obj-y += css.o
 obj-y += s390-virtio-ccw.o
 obj-y += virtio-ccw.o
-obj-y += s390-pci-bus.o
+obj-y += s390-pci-bus.o s390-pci-inst.o

hw/s390x/s390-pci-inst.h

+/*
+ * s390 PCI instruction definitions
+ *
+ * Copyright 2014 IBM Corp.
+ * Author(s): Frank Blaschka <frank.blaschka@de.ibm.com>
+ *            Hong Bo Li <lihbbj@cn.ibm.com>
+ *            Yi Min Zhao <zyimin@cn.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_PCI_INST_H
+#define HW_S390_PCI_INST_H
+
+#include <sysemu/dma.h>
+
+/* CLP common request & response block size */
+#define CLP_BLK_SIZE 4096
+#define PCI_BAR_COUNT 6
+#define PCI_MAX_FUNCTIONS 4096
+
+typedef struct ClpReqHdr {
+    uint16_t len;
+    uint16_t cmd;
+} QEMU_PACKED ClpReqHdr;
+
+typedef struct ClpRspHdr {
+    uint16_t len;
+    uint16_t rsp;
+} QEMU_PACKED ClpRspHdr;
+
+/* CLP Response Codes */
+#define CLP_RC_OK         0x0010  /* Command request successfully */
+#define CLP_RC_CMD        0x0020  /* Command code not recognized */
+#define CLP_RC_PERM       0x0030  /* Command not authorized */
+#define CLP_RC_FMT        0x0040  /* Invalid command request format */
+#define CLP_RC_LEN        0x0050  /* Invalid command request length */
+#define CLP_RC_8K         0x0060  /* Command requires 8K LPCB */
+#define CLP_RC_RESNOT0    0x0070  /* Reserved field not zero */
+#define CLP_RC_NODATA     0x0080  /* No data available */
+#define CLP_RC_FC_UNKNOWN 0x0100  /* Function code not recognized */
+
+/*
+ * Call Logical Processor - Command Codes
+ */
+#define CLP_LIST_PCI            0x0002
+#define CLP_QUERY_PCI_FN        0x0003
+#define CLP_QUERY_PCI_FNGRP     0x0004
+#define CLP_SET_PCI_FN          0x0005
+
+/* PCI function handle list entry */
+typedef struct ClpFhListEntry {
+    uint16_t device_id;
+    uint16_t vendor_id;
+#define CLP_FHLIST_MASK_CONFIG 0x80000000
+    uint32_t config;
+    uint32_t fid;
+    uint32_t fh;
+} QEMU_PACKED ClpFhListEntry;
+
+#define CLP_RC_SETPCIFN_FH      0x0101 /* Invalid PCI fn handle */
+#define CLP_RC_SETPCIFN_FHOP    0x0102 /* Fn handle not valid for op */
+#define CLP_RC_SETPCIFN_DMAAS   0x0103 /* Invalid DMA addr space */
+#define CLP_RC_SETPCIFN_RES     0x0104 /* Insufficient resources */
+#define CLP_RC_SETPCIFN_ALRDY   0x0105 /* Fn already in requested state */
+#define CLP_RC_SETPCIFN_ERR     0x0106 /* Fn in permanent error state */
+#define CLP_RC_SETPCIFN_RECPND  0x0107 /* Error recovery pending */
+#define CLP_RC_SETPCIFN_BUSY    0x0108 /* Fn busy */
+#define CLP_RC_LISTPCI_BADRT    0x010a /* Resume token not recognized */
+#define CLP_RC_QUERYPCIFG_PFGID 0x010b /* Unrecognized PFGID */
+
+/* request or response block header length */
+#define LIST_PCI_HDR_LEN 32
+
+/* Number of function handles fitting in response block */
+#define CLP_FH_LIST_NR_ENTRIES \
+    ((CLP_BLK_SIZE - 2 * LIST_PCI_HDR_LEN) \
+        / sizeof(ClpFhListEntry))
+
+#define CLP_SET_ENABLE_PCI_FN  0 /* Yes, 0 enables it */
+#define CLP_SET_DISABLE_PCI_FN 1 /* Yes, 1 disables it */
+
+#define CLP_UTIL_STR_LEN 64
+
+#define CLP_MASK_FMT 0xf0000000
+
+/* List PCI functions request */
+typedef struct ClpReqListPci {
+    ClpReqHdr hdr;
+    uint32_t fmt;
+    uint64_t reserved1;
+    uint64_t resume_token;
+    uint64_t reserved2;
+} QEMU_PACKED ClpReqListPci;
+
+/* List PCI functions response */
+typedef struct ClpRspListPci {
+    ClpRspHdr hdr;
+    uint32_t fmt;
+    uint64_t reserved1;
+    uint64_t resume_token;
+    uint32_t mdd;
+    uint16_t max_fn;
+    uint8_t reserved2;
+    uint8_t entry_size;
+    ClpFhListEntry fh_list[CLP_FH_LIST_NR_ENTRIES];
+} QEMU_PACKED ClpRspListPci;
+
+/* Query PCI function request */
+typedef struct ClpReqQueryPci {
+    ClpReqHdr hdr;
+    uint32_t fmt;
+    uint64_t reserved1;
+    uint32_t fh; /* function handle */
+    uint32_t reserved2;
+    uint64_t reserved3;
+} QEMU_PACKED ClpReqQueryPci;
+
+/* Query PCI function response */
+typedef struct ClpRspQueryPci {
+    ClpRspHdr hdr;
+    uint32_t fmt;
+    uint64_t reserved1;
+    uint16_t vfn; /* virtual fn number */
+#define CLP_RSP_QPCI_MASK_UTIL  0x100
+#define CLP_RSP_QPCI_MASK_PFGID 0xff
+    uint16_t ug;
+    uint32_t fid; /* pci function id */
+    uint8_t bar_size[PCI_BAR_COUNT];
+    uint16_t pchid;
+    uint32_t bar[PCI_BAR_COUNT];
+    uint64_t reserved2;
+    uint64_t sdma; /* start dma as */
+    uint64_t edma; /* end dma as */
+    uint32_t reserved3[11];
+    uint32_t uid;
+    uint8_t util_str[CLP_UTIL_STR_LEN]; /* utility string */
+} QEMU_PACKED ClpRspQueryPci;
+
+/* Query PCI function group request */
+typedef struct ClpReqQueryPciGrp {
+    ClpReqHdr hdr;
+    uint32_t fmt;
+    uint64_t reserved1;
+#define CLP_REQ_QPCIG_MASK_PFGID 0xff
+    uint32_t g;
+    uint32_t reserved2;
+    uint64_t reserved3;
+} QEMU_PACKED ClpReqQueryPciGrp;
+
+/* Query PCI function group response */
+typedef struct ClpRspQueryPciGrp {
+    ClpRspHdr hdr;
+    uint32_t fmt;
+    uint64_t reserved1;
+#define CLP_RSP_QPCIG_MASK_NOI 0xfff
+    uint16_t i;
+    uint8_t version;
+#define CLP_RSP_QPCIG_MASK_FRAME   0x2
+#define CLP_RSP_QPCIG_MASK_REFRESH 0x1
+    uint8_t fr;
+    uint16_t reserved2;
+    uint16_t mui;
+    uint64_t reserved3;
+    uint64_t dasm; /* dma address space mask */
+    uint64_t msia; /* MSI address */
+    uint64_t reserved4;
+    uint64_t reserved5;
+} QEMU_PACKED ClpRspQueryPciGrp;
+
+/* Set PCI function request */
+typedef struct ClpReqSetPci {
+    ClpReqHdr hdr;
+    uint32_t fmt;
+    uint64_t reserved1;
+    uint32_t fh; /* function handle */
+    uint16_t reserved2;
+    uint8_t oc; /* operation controls */
+    uint8_t ndas; /* number of dma spaces */
+    uint64_t reserved3;
+} QEMU_PACKED ClpReqSetPci;
+
+/* Set PCI function response */
+typedef struct ClpRspSetPci {
+    ClpRspHdr hdr;
+    uint32_t fmt;
+    uint64_t reserved1;
+    uint32_t fh; /* function handle */
+    uint32_t reserved3;
+    uint64_t reserved4;
+} QEMU_PACKED ClpRspSetPci;
+
+typedef struct ClpReqRspListPci {
+    ClpReqListPci request;
+    ClpRspListPci response;
+} QEMU_PACKED ClpReqRspListPci;
+
+typedef struct ClpReqRspSetPci {
+    ClpReqSetPci request;
+    ClpRspSetPci response;
+} QEMU_PACKED ClpReqRspSetPci;
+
+typedef struct ClpReqRspQueryPci {
+    ClpReqQueryPci request;
+    ClpRspQueryPci response;
+} QEMU_PACKED ClpReqRspQueryPci;
+
+typedef struct ClpReqRspQueryPciGrp {
+    ClpReqQueryPciGrp request;
+    ClpRspQueryPciGrp response;
+} QEMU_PACKED ClpReqRspQueryPciGrp;
+
+/* Load/Store status codes */
+#define ZPCI_PCI_ST_FUNC_NOT_ENABLED        4
+#define ZPCI_PCI_ST_FUNC_IN_ERR             8
+#define ZPCI_PCI_ST_BLOCKED                 12
+#define ZPCI_PCI_ST_INSUF_RES               16
+#define ZPCI_PCI_ST_INVAL_AS                20
+#define ZPCI_PCI_ST_FUNC_ALREADY_ENABLED    24
+#define ZPCI_PCI_ST_DMA_AS_NOT_ENABLED      28
+#define ZPCI_PCI_ST_2ND_OP_IN_INV_AS        36
+#define ZPCI_PCI_ST_FUNC_NOT_AVAIL          40
+#define ZPCI_PCI_ST_ALREADY_IN_RQ_STATE     44
+
+/* Load/Store return codes */
+#define ZPCI_PCI_LS_OK              0
+#define ZPCI_PCI_LS_ERR             1
+#define ZPCI_PCI_LS_BUSY            2
+#define ZPCI_PCI_LS_INVAL_HANDLE    3
+
+/* Modify PCI Function Controls */
+#define ZPCI_MOD_FC_REG_INT     2
+#define ZPCI_MOD_FC_DEREG_INT   3
+#define ZPCI_MOD_FC_REG_IOAT    4
+#define ZPCI_MOD_FC_DEREG_IOAT  5
+#define ZPCI_MOD_FC_REREG_IOAT  6
+#define ZPCI_MOD_FC_RESET_ERROR 7
+#define ZPCI_MOD_FC_RESET_BLOCK 9
+#define ZPCI_MOD_FC_SET_MEASURE 10
+
+/* FIB function controls */
+#define ZPCI_FIB_FC_ENABLED     0x80
+#define ZPCI_FIB_FC_ERROR       0x40
+#define ZPCI_FIB_FC_LS_BLOCKED  0x20
+#define ZPCI_FIB_FC_DMAAS_REG   0x10
+
+/* FIB function controls */
+#define ZPCI_FIB_FC_ENABLED     0x80
+#define ZPCI_FIB_FC_ERROR       0x40
+#define ZPCI_FIB_FC_LS_BLOCKED  0x20
+#define ZPCI_FIB_FC_DMAAS_REG   0x10
+
+/* Function Information Block */
+typedef struct ZpciFib {
+    uint8_t fmt;   /* format */
+    uint8_t reserved1[7];
+    uint8_t fc;                  /* function controls */
+    uint8_t reserved2;
+    uint16_t reserved3;
+    uint32_t reserved4;
+    uint64_t pba;                /* PCI base address */
+    uint64_t pal;                /* PCI address limit */
+    uint64_t iota;               /* I/O Translation Anchor */
+#define FIB_DATA_ISC(x)    (((x) >> 28) & 0x7)
+#define FIB_DATA_NOI(x)    (((x) >> 16) & 0xfff)
+#define FIB_DATA_AIBVO(x) (((x) >> 8) & 0x3f)
+#define FIB_DATA_SUM(x)    (((x) >> 7) & 0x1)
+#define FIB_DATA_AISBO(x)  ((x) & 0x3f)
+    uint32_t data;
+    uint32_t reserved5;
+    uint64_t aibv;               /* Adapter int bit vector address */
+    uint64_t aisb;               /* Adapter int summary bit address */
+    uint64_t fmb_addr;           /* Function measurement address and key */
+    uint32_t reserved6;
+    uint32_t gd;
+} QEMU_PACKED ZpciFib;
+
+int clp_service_call(S390CPU *cpu, uint8_t r2);
+int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2);
+int pcistg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2);
+int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2);
+int pcistb_service_call(S390CPU *cpu, uint8_t r1, uint8_t r3, uint64_t gaddr);
+int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba);
+int stpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba);
+
+#endif

target-s390x/kvm.c

@@ -40,6 +40,7 @@
 #include "exec/gdbstub.h"
 #include "trace.h"
 #include "qapi-event.h"
+#include "hw/s390x/s390-pci-inst.h"
 
 /* #define DEBUG_KVM */
 
@@ -56,6 +57,7 @@
 #define IPA0_B2                         0xb200
 #define IPA0_B9                         0xb900
 #define IPA0_EB                         0xeb00
+#define IPA0_E3                         0xe300
 
 #define PRIV_B2_SCLP_CALL               0x20
 #define PRIV_B2_CSCH                    0x30
@@ -76,8 +78,17 @@
 #define PRIV_B2_XSCH                    0x76
 
 #define PRIV_EB_SQBS                    0x8a
+#define PRIV_EB_PCISTB                  0xd0
+#define PRIV_EB_SIC                     0xd1
 
 #define PRIV_B9_EQBS                    0x9c
+#define PRIV_B9_CLP                     0xa0
+#define PRIV_B9_PCISTG                  0xd0
+#define PRIV_B9_PCILG                   0xd2
+#define PRIV_B9_RPCIT                   0xd3
+
+#define PRIV_E3_MPCIFC                  0xd0
+#define PRIV_E3_STPCIFC                 0xd4
 
 #define DIAG_IPL                        0x308
 #define DIAG_KVM_HYPERCALL              0x500
@@ -839,11 +850,124 @@ static int handle_b2(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
     return rc;
 }
 
+static uint64_t get_base_disp_rxy(S390CPU *cpu, struct kvm_run *run)
+{
+    CPUS390XState *env = &cpu->env;
+    uint32_t x2 = (run->s390_sieic.ipa & 0x000f);
+    uint32_t base2 = run->s390_sieic.ipb >> 28;
+    uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) +
+                     ((run->s390_sieic.ipb & 0xff00) << 4);
+
+    if (disp2 & 0x80000) {
+        disp2 += 0xfff00000;
+    }
+
+    return (base2 ? env->regs[base2] : 0) +
+           (x2 ? env->regs[x2] : 0) + (long)(int)disp2;
+}
+
+static uint64_t get_base_disp_rsy(S390CPU *cpu, struct kvm_run *run)
+{
+    CPUS390XState *env = &cpu->env;
+    uint32_t base2 = run->s390_sieic.ipb >> 28;
+    uint32_t disp2 = ((run->s390_sieic.ipb & 0x0fff0000) >> 16) +
+                     ((run->s390_sieic.ipb & 0xff00) << 4);
+
+    if (disp2 & 0x80000) {
+        disp2 += 0xfff00000;
+    }
+
+    return (base2 ? env->regs[base2] : 0) + (long)(int)disp2;
+}
+
+static int kvm_clp_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+    uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
+
+    return clp_service_call(cpu, r2);
+}
+
+static int kvm_pcilg_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+    uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
+    uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
+
+    return pcilg_service_call(cpu, r1, r2);
+}
+
+static int kvm_pcistg_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+    uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
+    uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
+
+    return pcistg_service_call(cpu, r1, r2);
+}
+
+static int kvm_stpcifc_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+    uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
+    uint64_t fiba;
+
+    cpu_synchronize_state(CPU(cpu));
+    fiba = get_base_disp_rxy(cpu, run);
+
+    return stpcifc_service_call(cpu, r1, fiba);
+}
+
+static int kvm_sic_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+    /* NOOP */
+    return 0;
+}
+
+static int kvm_rpcit_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+    uint8_t r1 = (run->s390_sieic.ipb & 0x00f00000) >> 20;
+    uint8_t r2 = (run->s390_sieic.ipb & 0x000f0000) >> 16;
+
+    return rpcit_service_call(cpu, r1, r2);
+}
+
+static int kvm_pcistb_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+    uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
+    uint8_t r3 = run->s390_sieic.ipa & 0x000f;
+    uint64_t gaddr;
+
+    cpu_synchronize_state(CPU(cpu));
+    gaddr = get_base_disp_rsy(cpu, run);
+
+    return pcistb_service_call(cpu, r1, r3, gaddr);
+}
+
+static int kvm_mpcifc_service_call(S390CPU *cpu, struct kvm_run *run)
+{
+    uint8_t r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
+    uint64_t fiba;
+
+    cpu_synchronize_state(CPU(cpu));
+    fiba = get_base_disp_rxy(cpu, run);
+
+    return mpcifc_service_call(cpu, r1, fiba);
+}
+
 static int handle_b9(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
 {
     int r = 0;
 
     switch (ipa1) {
+    case PRIV_B9_CLP:
+        r = kvm_clp_service_call(cpu, run);
+        break;
+    case PRIV_B9_PCISTG:
+        r = kvm_pcistg_service_call(cpu, run);
+        break;
+    case PRIV_B9_PCILG:
+        r = kvm_pcilg_service_call(cpu, run);
+        break;
+    case PRIV_B9_RPCIT:
+        r = kvm_rpcit_service_call(cpu, run);
+        break;
     case PRIV_B9_EQBS:
         /* just inject exception */
         r = -1;
@@ -862,6 +986,12 @@ static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl)
     int r = 0;
 
     switch (ipbl) {
+    case PRIV_EB_PCISTB:
+        r = kvm_pcistb_service_call(cpu, run);
+        break;
+    case PRIV_EB_SIC:
+        r = kvm_sic_service_call(cpu, run);
+        break;
     case PRIV_EB_SQBS:
         /* just inject exception */
         r = -1;
@@ -875,6 +1005,26 @@ static int handle_eb(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl)
     return r;
 }
 
+static int handle_e3(S390CPU *cpu, struct kvm_run *run, uint8_t ipbl)
+{
+    int r = 0;
+
+    switch (ipbl) {
+    case PRIV_E3_MPCIFC:
+        r = kvm_mpcifc_service_call(cpu, run);
+        break;
+    case PRIV_E3_STPCIFC:
+        r = kvm_stpcifc_service_call(cpu, run);
+        break;
+    default:
+        r = -1;
+        DPRINTF("KVM: unhandled PRIV: 0xe3%x\n", ipbl);
+        break;
+    }
+
+    return r;
+}
+
 static int handle_hypercall(S390CPU *cpu, struct kvm_run *run)
 {
     CPUS390XState *env = &cpu->env;
@@ -1071,6 +1221,9 @@ static int handle_instruction(S390CPU *cpu, struct kvm_run *run)
     case IPA0_EB:
         r = handle_eb(cpu, run, run->s390_sieic.ipb & 0xff);
         break;
+    case IPA0_E3:
+        r = handle_e3(cpu, run, run->s390_sieic.ipb & 0xff);
+        break;
     case IPA0_DIAG:
         r = handle_diag(cpu, run, run->s390_sieic.ipb);
         break;