| /* |
| * I/O instructions for S/390 |
| * |
| * Copyright 2012, 2015 IBM Corp. |
| * Author(s): Cornelia Huck <cornelia.huck@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. |
| */ |
| |
| #include "qemu/osdep.h" |
| |
| #include "cpu.h" |
| #include "internal.h" |
| #include "hw/s390x/ioinst.h" |
| #include "trace.h" |
| #include "hw/s390x/s390-pci-bus.h" |
| #include "hw/s390x/pv.h" |
| |
| /* All I/O instructions but chsc use the s format */ |
| static uint64_t get_address_from_regs(CPUS390XState *env, uint32_t ipb, |
| uint8_t *ar) |
| { |
| /* |
| * Addresses for protected guests are all offsets into the |
| * satellite block which holds the IO control structures. Those |
| * control structures are always starting at offset 0 and are |
| * always aligned and accessible. So we can return 0 here which |
| * will pass the following address checks. |
| */ |
| if (s390_is_pv()) { |
| *ar = 0; |
| return 0; |
| } |
| return decode_basedisp_s(env, ipb, ar); |
| } |
| |
| int ioinst_disassemble_sch_ident(uint32_t value, int *m, int *cssid, int *ssid, |
| int *schid) |
| { |
| if (!IOINST_SCHID_ONE(value)) { |
| return -EINVAL; |
| } |
| if (!IOINST_SCHID_M(value)) { |
| if (IOINST_SCHID_CSSID(value)) { |
| return -EINVAL; |
| } |
| *cssid = 0; |
| *m = 0; |
| } else { |
| *cssid = IOINST_SCHID_CSSID(value); |
| *m = 1; |
| } |
| *ssid = IOINST_SCHID_SSID(value); |
| *schid = IOINST_SCHID_NR(value); |
| return 0; |
| } |
| |
| void ioinst_handle_xsch(S390CPU *cpu, uint64_t reg1, uintptr_t ra) |
| { |
| int cssid, ssid, schid, m; |
| SubchDev *sch; |
| |
| if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) { |
| s390_program_interrupt(&cpu->env, PGM_OPERAND, ra); |
| return; |
| } |
| trace_ioinst_sch_id("xsch", cssid, ssid, schid); |
| sch = css_find_subch(m, cssid, ssid, schid); |
| if (!sch || !css_subch_visible(sch)) { |
| setcc(cpu, 3); |
| return; |
| } |
| setcc(cpu, css_do_xsch(sch)); |
| } |
| |
| void ioinst_handle_csch(S390CPU *cpu, uint64_t reg1, uintptr_t ra) |
| { |
| int cssid, ssid, schid, m; |
| SubchDev *sch; |
| |
| if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) { |
| s390_program_interrupt(&cpu->env, PGM_OPERAND, ra); |
| return; |
| } |
| trace_ioinst_sch_id("csch", cssid, ssid, schid); |
| sch = css_find_subch(m, cssid, ssid, schid); |
| if (!sch || !css_subch_visible(sch)) { |
| setcc(cpu, 3); |
| return; |
| } |
| setcc(cpu, css_do_csch(sch)); |
| } |
| |
| void ioinst_handle_hsch(S390CPU *cpu, uint64_t reg1, uintptr_t ra) |
| { |
| int cssid, ssid, schid, m; |
| SubchDev *sch; |
| |
| if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) { |
| s390_program_interrupt(&cpu->env, PGM_OPERAND, ra); |
| return; |
| } |
| trace_ioinst_sch_id("hsch", cssid, ssid, schid); |
| sch = css_find_subch(m, cssid, ssid, schid); |
| if (!sch || !css_subch_visible(sch)) { |
| setcc(cpu, 3); |
| return; |
| } |
| setcc(cpu, css_do_hsch(sch)); |
| } |
| |
| static int ioinst_schib_valid(SCHIB *schib) |
| { |
| if ((be16_to_cpu(schib->pmcw.flags) & PMCW_FLAGS_MASK_INVALID) || |
| (be32_to_cpu(schib->pmcw.chars) & PMCW_CHARS_MASK_INVALID)) { |
| return 0; |
| } |
| /* Disallow extended measurements for now. */ |
| if (be32_to_cpu(schib->pmcw.chars) & PMCW_CHARS_MASK_XMWME) { |
| return 0; |
| } |
| return 1; |
| } |
| |
| void ioinst_handle_msch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra) |
| { |
| int cssid, ssid, schid, m; |
| SubchDev *sch; |
| SCHIB schib; |
| uint64_t addr; |
| CPUS390XState *env = &cpu->env; |
| uint8_t ar; |
| |
| addr = get_address_from_regs(env, ipb, &ar); |
| if (addr & 3) { |
| s390_program_interrupt(env, PGM_SPECIFICATION, ra); |
| return; |
| } |
| if (s390_is_pv()) { |
| s390_cpu_pv_mem_read(cpu, addr, &schib, sizeof(schib)); |
| } else if (s390_cpu_virt_mem_read(cpu, addr, ar, &schib, sizeof(schib))) { |
| s390_cpu_virt_mem_handle_exc(cpu, ra); |
| return; |
| } |
| if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid) || |
| !ioinst_schib_valid(&schib)) { |
| s390_program_interrupt(env, PGM_OPERAND, ra); |
| return; |
| } |
| trace_ioinst_sch_id("msch", cssid, ssid, schid); |
| sch = css_find_subch(m, cssid, ssid, schid); |
| if (!sch || !css_subch_visible(sch)) { |
| setcc(cpu, 3); |
| return; |
| } |
| setcc(cpu, css_do_msch(sch, &schib)); |
| } |
| |
| static void copy_orb_from_guest(ORB *dest, const ORB *src) |
| { |
| dest->intparm = be32_to_cpu(src->intparm); |
| dest->ctrl0 = be16_to_cpu(src->ctrl0); |
| dest->lpm = src->lpm; |
| dest->ctrl1 = src->ctrl1; |
| dest->cpa = be32_to_cpu(src->cpa); |
| } |
| |
| static int ioinst_orb_valid(ORB *orb) |
| { |
| if ((orb->ctrl0 & ORB_CTRL0_MASK_INVALID) || |
| (orb->ctrl1 & ORB_CTRL1_MASK_INVALID)) { |
| return 0; |
| } |
| /* We don't support MIDA. */ |
| if (orb->ctrl1 & ORB_CTRL1_MASK_MIDAW) { |
| return 0; |
| } |
| if ((orb->cpa & HIGH_ORDER_BIT) != 0) { |
| return 0; |
| } |
| return 1; |
| } |
| |
| void ioinst_handle_ssch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra) |
| { |
| int cssid, ssid, schid, m; |
| SubchDev *sch; |
| ORB orig_orb, orb; |
| uint64_t addr; |
| CPUS390XState *env = &cpu->env; |
| uint8_t ar; |
| |
| addr = get_address_from_regs(env, ipb, &ar); |
| if (addr & 3) { |
| s390_program_interrupt(env, PGM_SPECIFICATION, ra); |
| return; |
| } |
| if (s390_is_pv()) { |
| s390_cpu_pv_mem_read(cpu, addr, &orig_orb, sizeof(orb)); |
| } else if (s390_cpu_virt_mem_read(cpu, addr, ar, &orig_orb, sizeof(orb))) { |
| s390_cpu_virt_mem_handle_exc(cpu, ra); |
| return; |
| } |
| copy_orb_from_guest(&orb, &orig_orb); |
| if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid) || |
| !ioinst_orb_valid(&orb)) { |
| s390_program_interrupt(env, PGM_OPERAND, ra); |
| return; |
| } |
| trace_ioinst_sch_id("ssch", cssid, ssid, schid); |
| sch = css_find_subch(m, cssid, ssid, schid); |
| if (!sch || !css_subch_visible(sch)) { |
| setcc(cpu, 3); |
| return; |
| } |
| setcc(cpu, css_do_ssch(sch, &orb)); |
| } |
| |
| void ioinst_handle_stcrw(S390CPU *cpu, uint32_t ipb, uintptr_t ra) |
| { |
| CRW crw; |
| uint64_t addr; |
| int cc; |
| CPUS390XState *env = &cpu->env; |
| uint8_t ar; |
| |
| addr = get_address_from_regs(env, ipb, &ar); |
| if (addr & 3) { |
| s390_program_interrupt(env, PGM_SPECIFICATION, ra); |
| return; |
| } |
| |
| cc = css_do_stcrw(&crw); |
| /* 0 - crw stored, 1 - zeroes stored */ |
| |
| if (s390_is_pv()) { |
| s390_cpu_pv_mem_write(cpu, addr, &crw, sizeof(crw)); |
| setcc(cpu, cc); |
| } else { |
| if (s390_cpu_virt_mem_write(cpu, addr, ar, &crw, sizeof(crw)) == 0) { |
| setcc(cpu, cc); |
| } else { |
| if (cc == 0) { |
| /* Write failed: requeue CRW since STCRW is suppressing */ |
| css_undo_stcrw(&crw); |
| } |
| s390_cpu_virt_mem_handle_exc(cpu, ra); |
| } |
| } |
| } |
| |
| void ioinst_handle_stsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, |
| uintptr_t ra) |
| { |
| int cssid, ssid, schid, m; |
| SubchDev *sch; |
| uint64_t addr; |
| int cc; |
| SCHIB schib; |
| CPUS390XState *env = &cpu->env; |
| uint8_t ar; |
| |
| addr = get_address_from_regs(env, ipb, &ar); |
| if (addr & 3) { |
| s390_program_interrupt(env, PGM_SPECIFICATION, ra); |
| return; |
| } |
| |
| if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) { |
| /* |
| * The Ultravisor checks schid bit 16 to be one and bits 0-12 |
| * to be 0 and injects a operand exception itself. |
| * |
| * Hence we should never end up here. |
| */ |
| g_assert(!s390_is_pv()); |
| /* |
| * As operand exceptions have a lower priority than access exceptions, |
| * we check whether the memory area is writeable (injecting the |
| * access execption if it is not) first. |
| */ |
| if (!s390_cpu_virt_mem_check_write(cpu, addr, ar, sizeof(schib))) { |
| s390_program_interrupt(env, PGM_OPERAND, ra); |
| } else { |
| s390_cpu_virt_mem_handle_exc(cpu, ra); |
| } |
| return; |
| } |
| trace_ioinst_sch_id("stsch", cssid, ssid, schid); |
| sch = css_find_subch(m, cssid, ssid, schid); |
| if (sch) { |
| if (css_subch_visible(sch)) { |
| cc = css_do_stsch(sch, &schib); |
| } else { |
| /* Indicate no more subchannels in this css/ss */ |
| cc = 3; |
| } |
| } else { |
| if (css_schid_final(m, cssid, ssid, schid)) { |
| cc = 3; /* No more subchannels in this css/ss */ |
| } else { |
| /* Store an empty schib. */ |
| memset(&schib, 0, sizeof(schib)); |
| cc = 0; |
| } |
| } |
| if (cc != 3) { |
| if (s390_is_pv()) { |
| s390_cpu_pv_mem_write(cpu, addr, &schib, sizeof(schib)); |
| } else if (s390_cpu_virt_mem_write(cpu, addr, ar, &schib, |
| sizeof(schib)) != 0) { |
| s390_cpu_virt_mem_handle_exc(cpu, ra); |
| return; |
| } |
| } else { |
| /* Access exceptions have a higher priority than cc3 */ |
| if (!s390_is_pv() && |
| s390_cpu_virt_mem_check_write(cpu, addr, ar, sizeof(schib)) != 0) { |
| s390_cpu_virt_mem_handle_exc(cpu, ra); |
| return; |
| } |
| } |
| setcc(cpu, cc); |
| } |
| |
| int ioinst_handle_tsch(S390CPU *cpu, uint64_t reg1, uint32_t ipb, uintptr_t ra) |
| { |
| CPUS390XState *env = &cpu->env; |
| int cssid, ssid, schid, m; |
| SubchDev *sch; |
| IRB irb; |
| uint64_t addr; |
| int cc, irb_len; |
| uint8_t ar; |
| |
| if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) { |
| s390_program_interrupt(env, PGM_OPERAND, ra); |
| return -EIO; |
| } |
| trace_ioinst_sch_id("tsch", cssid, ssid, schid); |
| addr = get_address_from_regs(env, ipb, &ar); |
| if (addr & 3) { |
| s390_program_interrupt(env, PGM_SPECIFICATION, ra); |
| return -EIO; |
| } |
| |
| sch = css_find_subch(m, cssid, ssid, schid); |
| if (sch && css_subch_visible(sch)) { |
| cc = css_do_tsch_get_irb(sch, &irb, &irb_len); |
| } else { |
| cc = 3; |
| } |
| /* 0 - status pending, 1 - not status pending, 3 - not operational */ |
| if (cc != 3) { |
| if (s390_is_pv()) { |
| s390_cpu_pv_mem_write(cpu, addr, &irb, irb_len); |
| } else if (s390_cpu_virt_mem_write(cpu, addr, ar, &irb, irb_len) != 0) { |
| s390_cpu_virt_mem_handle_exc(cpu, ra); |
| return -EFAULT; |
| } |
| css_do_tsch_update_subch(sch); |
| } else { |
| irb_len = sizeof(irb) - sizeof(irb.emw); |
| /* Access exceptions have a higher priority than cc3 */ |
| if (!s390_is_pv() && |
| s390_cpu_virt_mem_check_write(cpu, addr, ar, irb_len) != 0) { |
| s390_cpu_virt_mem_handle_exc(cpu, ra); |
| return -EFAULT; |
| } |
| } |
| |
| setcc(cpu, cc); |
| return 0; |
| } |
| |
| typedef struct ChscReq { |
| uint16_t len; |
| uint16_t command; |
| uint32_t param0; |
| uint32_t param1; |
| uint32_t param2; |
| } QEMU_PACKED ChscReq; |
| |
| typedef struct ChscResp { |
| uint16_t len; |
| uint16_t code; |
| uint32_t param; |
| char data[]; |
| } QEMU_PACKED ChscResp; |
| |
| #define CHSC_MIN_RESP_LEN 0x0008 |
| |
| #define CHSC_SCPD 0x0002 |
| #define CHSC_SCSC 0x0010 |
| #define CHSC_SDA 0x0031 |
| #define CHSC_SEI 0x000e |
| |
| #define CHSC_SCPD_0_M 0x20000000 |
| #define CHSC_SCPD_0_C 0x10000000 |
| #define CHSC_SCPD_0_FMT 0x0f000000 |
| #define CHSC_SCPD_0_CSSID 0x00ff0000 |
| #define CHSC_SCPD_0_RFMT 0x00000f00 |
| #define CHSC_SCPD_0_RES 0xc000f000 |
| #define CHSC_SCPD_1_RES 0xffffff00 |
| #define CHSC_SCPD_01_CHPID 0x000000ff |
| static void ioinst_handle_chsc_scpd(ChscReq *req, ChscResp *res) |
| { |
| uint16_t len = be16_to_cpu(req->len); |
| uint32_t param0 = be32_to_cpu(req->param0); |
| uint32_t param1 = be32_to_cpu(req->param1); |
| uint16_t resp_code; |
| int rfmt; |
| uint16_t cssid; |
| uint8_t f_chpid, l_chpid; |
| int desc_size; |
| int m; |
| |
| rfmt = (param0 & CHSC_SCPD_0_RFMT) >> 8; |
| if ((rfmt == 0) || (rfmt == 1)) { |
| rfmt = !!(param0 & CHSC_SCPD_0_C); |
| } |
| if ((len != 0x0010) || (param0 & CHSC_SCPD_0_RES) || |
| (param1 & CHSC_SCPD_1_RES) || req->param2) { |
| resp_code = 0x0003; |
| goto out_err; |
| } |
| if (param0 & CHSC_SCPD_0_FMT) { |
| resp_code = 0x0007; |
| goto out_err; |
| } |
| cssid = (param0 & CHSC_SCPD_0_CSSID) >> 16; |
| m = param0 & CHSC_SCPD_0_M; |
| if (cssid != 0) { |
| if (!m || !css_present(cssid)) { |
| resp_code = 0x0008; |
| goto out_err; |
| } |
| } |
| f_chpid = param0 & CHSC_SCPD_01_CHPID; |
| l_chpid = param1 & CHSC_SCPD_01_CHPID; |
| if (l_chpid < f_chpid) { |
| resp_code = 0x0003; |
| goto out_err; |
| } |
| /* css_collect_chp_desc() is endian-aware */ |
| desc_size = css_collect_chp_desc(m, cssid, f_chpid, l_chpid, rfmt, |
| &res->data); |
| res->code = cpu_to_be16(0x0001); |
| res->len = cpu_to_be16(8 + desc_size); |
| res->param = cpu_to_be32(rfmt); |
| return; |
| |
| out_err: |
| res->code = cpu_to_be16(resp_code); |
| res->len = cpu_to_be16(CHSC_MIN_RESP_LEN); |
| res->param = cpu_to_be32(rfmt); |
| } |
| |
| #define CHSC_SCSC_0_M 0x20000000 |
| #define CHSC_SCSC_0_FMT 0x000f0000 |
| #define CHSC_SCSC_0_CSSID 0x0000ff00 |
| #define CHSC_SCSC_0_RES 0xdff000ff |
| static void ioinst_handle_chsc_scsc(ChscReq *req, ChscResp *res) |
| { |
| uint16_t len = be16_to_cpu(req->len); |
| uint32_t param0 = be32_to_cpu(req->param0); |
| uint8_t cssid; |
| uint16_t resp_code; |
| uint32_t general_chars[510]; |
| uint32_t chsc_chars[508]; |
| |
| if (len != 0x0010) { |
| resp_code = 0x0003; |
| goto out_err; |
| } |
| |
| if (param0 & CHSC_SCSC_0_FMT) { |
| resp_code = 0x0007; |
| goto out_err; |
| } |
| cssid = (param0 & CHSC_SCSC_0_CSSID) >> 8; |
| if (cssid != 0) { |
| if (!(param0 & CHSC_SCSC_0_M) || !css_present(cssid)) { |
| resp_code = 0x0008; |
| goto out_err; |
| } |
| } |
| if ((param0 & CHSC_SCSC_0_RES) || req->param1 || req->param2) { |
| resp_code = 0x0003; |
| goto out_err; |
| } |
| res->code = cpu_to_be16(0x0001); |
| res->len = cpu_to_be16(4080); |
| res->param = 0; |
| |
| memset(general_chars, 0, sizeof(general_chars)); |
| memset(chsc_chars, 0, sizeof(chsc_chars)); |
| |
| general_chars[0] = cpu_to_be32(0x03000000); |
| general_chars[1] = cpu_to_be32(0x00079000); |
| general_chars[3] = cpu_to_be32(0x00080000); |
| |
| chsc_chars[0] = cpu_to_be32(0x40000000); |
| chsc_chars[3] = cpu_to_be32(0x00040000); |
| |
| memcpy(res->data, general_chars, sizeof(general_chars)); |
| memcpy(res->data + sizeof(general_chars), chsc_chars, sizeof(chsc_chars)); |
| return; |
| |
| out_err: |
| res->code = cpu_to_be16(resp_code); |
| res->len = cpu_to_be16(CHSC_MIN_RESP_LEN); |
| res->param = 0; |
| } |
| |
| #define CHSC_SDA_0_FMT 0x0f000000 |
| #define CHSC_SDA_0_OC 0x0000ffff |
| #define CHSC_SDA_0_RES 0xf0ff0000 |
| #define CHSC_SDA_OC_MCSSE 0x0 |
| #define CHSC_SDA_OC_MSS 0x2 |
| static void ioinst_handle_chsc_sda(ChscReq *req, ChscResp *res) |
| { |
| uint16_t resp_code = 0x0001; |
| uint16_t len = be16_to_cpu(req->len); |
| uint32_t param0 = be32_to_cpu(req->param0); |
| uint16_t oc; |
| int ret; |
| |
| if ((len != 0x0400) || (param0 & CHSC_SDA_0_RES)) { |
| resp_code = 0x0003; |
| goto out; |
| } |
| |
| if (param0 & CHSC_SDA_0_FMT) { |
| resp_code = 0x0007; |
| goto out; |
| } |
| |
| oc = param0 & CHSC_SDA_0_OC; |
| switch (oc) { |
| case CHSC_SDA_OC_MCSSE: |
| ret = css_enable_mcsse(); |
| if (ret == -EINVAL) { |
| resp_code = 0x0101; |
| goto out; |
| } |
| break; |
| case CHSC_SDA_OC_MSS: |
| ret = css_enable_mss(); |
| if (ret == -EINVAL) { |
| resp_code = 0x0101; |
| goto out; |
| } |
| break; |
| default: |
| resp_code = 0x0003; |
| goto out; |
| } |
| |
| out: |
| res->code = cpu_to_be16(resp_code); |
| res->len = cpu_to_be16(CHSC_MIN_RESP_LEN); |
| res->param = 0; |
| } |
| |
| static int chsc_sei_nt0_get_event(void *res) |
| { |
| /* no events yet */ |
| return 1; |
| } |
| |
| static int chsc_sei_nt0_have_event(void) |
| { |
| /* no events yet */ |
| return 0; |
| } |
| |
| static int chsc_sei_nt2_get_event(void *res) |
| { |
| if (s390_has_feat(S390_FEAT_ZPCI)) { |
| return pci_chsc_sei_nt2_get_event(res); |
| } |
| return 1; |
| } |
| |
| static int chsc_sei_nt2_have_event(void) |
| { |
| if (s390_has_feat(S390_FEAT_ZPCI)) { |
| return pci_chsc_sei_nt2_have_event(); |
| } |
| return 0; |
| } |
| |
| #define CHSC_SEI_NT0 (1ULL << 63) |
| #define CHSC_SEI_NT2 (1ULL << 61) |
| static void ioinst_handle_chsc_sei(ChscReq *req, ChscResp *res) |
| { |
| uint64_t selection_mask = ldq_p(&req->param1); |
| uint8_t *res_flags = (uint8_t *)res->data; |
| int have_event = 0; |
| int have_more = 0; |
| |
| /* regarding architecture nt0 can not be masked */ |
| have_event = !chsc_sei_nt0_get_event(res); |
| have_more = chsc_sei_nt0_have_event(); |
| |
| if (selection_mask & CHSC_SEI_NT2) { |
| if (!have_event) { |
| have_event = !chsc_sei_nt2_get_event(res); |
| } |
| |
| if (!have_more) { |
| have_more = chsc_sei_nt2_have_event(); |
| } |
| } |
| |
| if (have_event) { |
| res->code = cpu_to_be16(0x0001); |
| if (have_more) { |
| (*res_flags) |= 0x80; |
| } else { |
| (*res_flags) &= ~0x80; |
| css_clear_sei_pending(); |
| } |
| } else { |
| res->code = cpu_to_be16(0x0005); |
| res->len = cpu_to_be16(CHSC_MIN_RESP_LEN); |
| } |
| } |
| |
| static void ioinst_handle_chsc_unimplemented(ChscResp *res) |
| { |
| res->len = cpu_to_be16(CHSC_MIN_RESP_LEN); |
| res->code = cpu_to_be16(0x0004); |
| res->param = 0; |
| } |
| |
| void ioinst_handle_chsc(S390CPU *cpu, uint32_t ipb, uintptr_t ra) |
| { |
| ChscReq *req; |
| ChscResp *res; |
| uint64_t addr = 0; |
| int reg; |
| uint16_t len; |
| uint16_t command; |
| CPUS390XState *env = &cpu->env; |
| uint8_t buf[TARGET_PAGE_SIZE]; |
| |
| trace_ioinst("chsc"); |
| reg = (ipb >> 20) & 0x00f; |
| if (!s390_is_pv()) { |
| addr = env->regs[reg]; |
| } |
| /* Page boundary? */ |
| if (addr & 0xfff) { |
| s390_program_interrupt(env, PGM_SPECIFICATION, ra); |
| return; |
| } |
| /* |
| * Reading sizeof(ChscReq) bytes is currently enough for all of our |
| * present CHSC sub-handlers ... if we ever need more, we should take |
| * care of req->len here first. |
| */ |
| if (s390_is_pv()) { |
| s390_cpu_pv_mem_read(cpu, addr, buf, sizeof(ChscReq)); |
| } else if (s390_cpu_virt_mem_read(cpu, addr, reg, buf, sizeof(ChscReq))) { |
| s390_cpu_virt_mem_handle_exc(cpu, ra); |
| return; |
| } |
| req = (ChscReq *)buf; |
| len = be16_to_cpu(req->len); |
| /* Length field valid? */ |
| if ((len < 16) || (len > 4088) || (len & 7)) { |
| s390_program_interrupt(env, PGM_OPERAND, ra); |
| return; |
| } |
| memset((char *)req + len, 0, TARGET_PAGE_SIZE - len); |
| res = (void *)((char *)req + len); |
| command = be16_to_cpu(req->command); |
| trace_ioinst_chsc_cmd(command, len); |
| switch (command) { |
| case CHSC_SCSC: |
| ioinst_handle_chsc_scsc(req, res); |
| break; |
| case CHSC_SCPD: |
| ioinst_handle_chsc_scpd(req, res); |
| break; |
| case CHSC_SDA: |
| ioinst_handle_chsc_sda(req, res); |
| break; |
| case CHSC_SEI: |
| ioinst_handle_chsc_sei(req, res); |
| break; |
| default: |
| ioinst_handle_chsc_unimplemented(res); |
| break; |
| } |
| |
| if (s390_is_pv()) { |
| s390_cpu_pv_mem_write(cpu, addr + len, res, be16_to_cpu(res->len)); |
| setcc(cpu, 0); /* Command execution complete */ |
| } else { |
| if (!s390_cpu_virt_mem_write(cpu, addr + len, reg, res, |
| be16_to_cpu(res->len))) { |
| setcc(cpu, 0); /* Command execution complete */ |
| } else { |
| s390_cpu_virt_mem_handle_exc(cpu, ra); |
| } |
| } |
| } |
| |
| #define SCHM_REG1_RES(_reg) (_reg & 0x000000000ffffffc) |
| #define SCHM_REG1_MBK(_reg) ((_reg & 0x00000000f0000000) >> 28) |
| #define SCHM_REG1_UPD(_reg) ((_reg & 0x0000000000000002) >> 1) |
| #define SCHM_REG1_DCT(_reg) (_reg & 0x0000000000000001) |
| |
| void ioinst_handle_schm(S390CPU *cpu, uint64_t reg1, uint64_t reg2, |
| uint32_t ipb, uintptr_t ra) |
| { |
| uint8_t mbk; |
| int update; |
| int dct; |
| CPUS390XState *env = &cpu->env; |
| |
| trace_ioinst("schm"); |
| |
| if (SCHM_REG1_RES(reg1)) { |
| s390_program_interrupt(env, PGM_OPERAND, ra); |
| return; |
| } |
| |
| mbk = SCHM_REG1_MBK(reg1); |
| update = SCHM_REG1_UPD(reg1); |
| dct = SCHM_REG1_DCT(reg1); |
| |
| if (update && (reg2 & 0x000000000000001f)) { |
| s390_program_interrupt(env, PGM_OPERAND, ra); |
| return; |
| } |
| |
| css_do_schm(mbk, update, dct, update ? reg2 : 0); |
| } |
| |
| void ioinst_handle_rsch(S390CPU *cpu, uint64_t reg1, uintptr_t ra) |
| { |
| int cssid, ssid, schid, m; |
| SubchDev *sch; |
| |
| if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) { |
| s390_program_interrupt(&cpu->env, PGM_OPERAND, ra); |
| return; |
| } |
| trace_ioinst_sch_id("rsch", cssid, ssid, schid); |
| sch = css_find_subch(m, cssid, ssid, schid); |
| if (!sch || !css_subch_visible(sch)) { |
| setcc(cpu, 3); |
| return; |
| } |
| setcc(cpu, css_do_rsch(sch)); |
| } |
| |
| #define RCHP_REG1_RES(_reg) (_reg & 0x00000000ff00ff00) |
| #define RCHP_REG1_CSSID(_reg) ((_reg & 0x0000000000ff0000) >> 16) |
| #define RCHP_REG1_CHPID(_reg) (_reg & 0x00000000000000ff) |
| void ioinst_handle_rchp(S390CPU *cpu, uint64_t reg1, uintptr_t ra) |
| { |
| int cc; |
| uint8_t cssid; |
| uint8_t chpid; |
| int ret; |
| CPUS390XState *env = &cpu->env; |
| |
| if (RCHP_REG1_RES(reg1)) { |
| s390_program_interrupt(env, PGM_OPERAND, ra); |
| return; |
| } |
| |
| cssid = RCHP_REG1_CSSID(reg1); |
| chpid = RCHP_REG1_CHPID(reg1); |
| |
| trace_ioinst_chp_id("rchp", cssid, chpid); |
| |
| ret = css_do_rchp(cssid, chpid); |
| |
| switch (ret) { |
| case -ENODEV: |
| cc = 3; |
| break; |
| case -EBUSY: |
| cc = 2; |
| break; |
| case 0: |
| cc = 0; |
| break; |
| default: |
| /* Invalid channel subsystem. */ |
| s390_program_interrupt(env, PGM_OPERAND, ra); |
| return; |
| } |
| setcc(cpu, cc); |
| } |
| |
| #define SAL_REG1_INVALID(_reg) (_reg & 0x0000000080000000) |
| void ioinst_handle_sal(S390CPU *cpu, uint64_t reg1, uintptr_t ra) |
| { |
| /* We do not provide address limit checking, so let's suppress it. */ |
| if (SAL_REG1_INVALID(reg1) || reg1 & 0x000000000000ffff) { |
| s390_program_interrupt(&cpu->env, PGM_OPERAND, ra); |
| } |
| } |
