[Qemu-devel] [PATCH RFC 0/2] s390x: support zpci in tcg

[Qemu-devel] [PATCH RFC 0/2] s390x: support zpci in tcg

[Cornelia Huck]

This patch set (available at git://github.com/cohuck/qemu pci-tcg)
wires up zpci under tcg. A guest started with

qemu-system-s390x -M s390-ccw-virtio,accel=tcg -cpu qemu,zpci=on -device virtio-net-pci (...)

and a 4.15 kernel in the guest (needed because the requirement for ais
was dropped with

commit 48070c73058be6de9c0d754d441ed7092dfc8f12
Author: Christian Borntraeger <borntraeger@de.ibm.com>
Date:   Mon Oct 30 14:38:58 2017 +0100

    s390/pci: do not require AIS facility

and we don't have a working ais with tcg yet), I get sensible output
out of lspci.

RFC because I'm not sure that I put up the tcg wires in the best way.

Cornelia Huck (2):
  s390x/tcg: wire up pci instructions
  s390x/cpumodel: allow zpci features in qemu model

 target/s390x/gen-features.c |   3 ++
 target/s390x/helper.h       |   9 ++++
 target/s390x/insn-data.def  |  13 +++++
 target/s390x/misc_helper.c  | 123 ++++++++++++++++++++++++++++++++++++++++++++
 target/s390x/translate.c    | 123 ++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 271 insertions(+)

-- 
2.13.6

[Qemu-devel] [PATCH RFC 1/2] s390x/tcg: wire up pci instructions

[Cornelia Huck]

On s390x, pci support is implemented via a set of instructions
(no mmio). Unfortunately, none of them are documented in the
PoP; the code is based upon the existing implementation for KVM
and the Linux zpci driver.

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
 target/s390x/helper.h      |   9 ++++
 target/s390x/insn-data.def |  13 +++++
 target/s390x/misc_helper.c | 123 +++++++++++++++++++++++++++++++++++++++++++++
 target/s390x/translate.c   | 123 +++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 268 insertions(+)

diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index 59a1d9869b..9887efbb3a 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -172,4 +172,13 @@ DEF_HELPER_2(stcrw, void, env, i64)
 DEF_HELPER_3(stsch, void, env, i64, i64)
 DEF_HELPER_3(tsch, void, env, i64, i64)
 DEF_HELPER_2(chsc, void, env, i64)
+
+DEF_HELPER_2(clp, void, env, i32)
+DEF_HELPER_3(pcilg, void, env, i32, i32)
+DEF_HELPER_3(pcistg, void, env, i32, i32)
+DEF_HELPER_4(stpcifc, void, env, i32, i64, i32)
+DEF_HELPER_3(sic, void, env, i64, i64)
+DEF_HELPER_3(rpcit, void, env, i32, i32)
+DEF_HELPER_5(pcistb, void, env, i32, i32, i64, i32)
+DEF_HELPER_4(mpcifc, void, env, i32, i64, i32)
 #endif
diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index 11ee43dcbc..2ffc051072 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1067,4 +1067,17 @@
     /* ??? Not listed in PoO ninth edition, but there's a linux driver that
        uses it: "A CHSC subchannel is usually present on LPAR only."  */
     C(0xb25f, CHSC,  RRE,     Z,   0, insn, 0, 0, chsc, 0)
+
+/* zPCI Instructions */
+    /* None of these instructions are documented in the PoP, so this is all
+       based upon target/s390x/kvm.c and Linux code and likely incomplete */
+    C(0xebd0, PCISTB, RSY_a, PCI, 0, 0, 0, 0, pcistb, 0)
+    C(0xebd1, SIC, RSY_a, PCI, 0, 0, 0, 0, sic, 0)
+    C(0xb9a0, CLP, RRF_c, PCI, 0, 0, 0, 0, clp, 0)
+    C(0xb9d0, PCISTG, RRE, PCI, 0, 0, 0, 0, pcistg, 0)
+    C(0xb9d2, PCILG, RRE, PCI, 0, 0, 0, 0, pcilg, 0)
+    C(0xb9d3, RPCIT, RRE, PCI, 0, 0, 0, 0, rpcit, 0)
+    C(0xe3d0, MPCIFC, RXY_a, PCI, 0, 0, 0, 0, mpcifc, 0)
+    C(0xe3d4, STPCIFC, RXY_a, PCI, 0, 0, 0, 0, stpcifc, 0)
+
 #endif /* CONFIG_USER_ONLY */
diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c
index 86da6aab7e..1271106628 100644
--- a/target/s390x/misc_helper.c
+++ b/target/s390x/misc_helper.c
@@ -36,6 +36,7 @@
 #include "hw/s390x/ebcdic.h"
 #include "hw/s390x/s390-virtio-hcall.h"
 #include "hw/s390x/sclp.h"
+#include "hw/s390x/s390-pci-inst.h"
 #endif
 
 /* #define DEBUG_HELPER */
@@ -560,3 +561,125 @@ uint32_t HELPER(stfle)(CPUS390XState *env, uint64_t addr)
     env->regs[0] = deposit64(env->regs[0], 0, 8, (max_bytes / 8) - 1);
     return count_bytes >= max_bytes ? 0 : 3;
 }
+
+#ifndef CONFIG_USER_ONLY
+void HELPER(clp)(CPUS390XState *env, uint32_t r2)
+{
+    S390CPU *cpu = s390_env_get_cpu(env);
+    int r = -1;
+
+    if (s390_has_feat(S390_FEAT_ZPCI)) {
+        qemu_mutex_lock_iothread();
+        r = clp_service_call(cpu, r2, GETPC());
+        qemu_mutex_unlock_iothread();
+    }
+    if (r) {
+        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
+    }
+}
+
+void HELPER(pcilg)(CPUS390XState *env, uint32_t r1, uint32_t r2)
+{
+    S390CPU *cpu = s390_env_get_cpu(env);
+    int r = -1;
+
+    if (s390_has_feat(S390_FEAT_ZPCI)) {
+        qemu_mutex_lock_iothread();
+        r = pcilg_service_call(cpu, r1, r2, GETPC());
+        qemu_mutex_unlock_iothread();
+    }
+    if (r) {
+        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
+    }
+}
+
+void HELPER(pcistg)(CPUS390XState *env, uint32_t r1, uint32_t r2)
+{
+    S390CPU *cpu = s390_env_get_cpu(env);
+    int r = -1;
+
+    if (s390_has_feat(S390_FEAT_ZPCI)) {
+        qemu_mutex_lock_iothread();
+        r = pcistg_service_call(cpu, r1, r2, GETPC());
+        qemu_mutex_unlock_iothread();
+    }
+    if (r) {
+        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
+    }
+}
+
+void HELPER(stpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba,
+                     uint32_t ar)
+{
+    S390CPU *cpu = s390_env_get_cpu(env);
+    int r = -1;
+
+    if (s390_has_feat(S390_FEAT_ZPCI)) {
+        qemu_mutex_lock_iothread();
+        r = stpcifc_service_call(cpu, r1, fiba, ar, GETPC());
+        qemu_mutex_unlock_iothread();
+    }
+    if (r) {
+        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
+    }
+}
+
+void HELPER(sic)(CPUS390XState *env, uint64_t r1, uint64_t r3)
+{
+    int r;
+
+    qemu_mutex_lock_iothread();
+    r = css_do_sic(env, r1 & 0xffff, (r3 >> 27) & 0x7);
+    qemu_mutex_unlock_iothread();
+    if (r) {
+        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
+    }
+}
+
+void HELPER(rpcit)(CPUS390XState *env, uint32_t r1, uint32_t r2)
+{
+    S390CPU *cpu = s390_env_get_cpu(env);
+    int r = -1;
+
+    if (s390_has_feat(S390_FEAT_ZPCI)) {
+        qemu_mutex_lock_iothread();
+        r = rpcit_service_call(cpu, r1, r2, GETPC());
+        qemu_mutex_unlock_iothread();
+    }
+    if (r) {
+        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
+    }
+}
+
+void HELPER(pcistb)(CPUS390XState *env, uint32_t r1, uint32_t r3,
+                    uint64_t gaddr, uint32_t ar)
+{
+    S390CPU *cpu = s390_env_get_cpu(env);
+    int r = -1;
+
+    if (s390_has_feat(S390_FEAT_ZPCI)) {
+        qemu_mutex_lock_iothread();
+        r = pcistb_service_call(cpu, r1, r3, gaddr, ar, GETPC());
+        qemu_mutex_unlock_iothread();
+    }
+    if (r) {
+        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
+    }
+}
+
+void HELPER(mpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba,
+                    uint32_t ar)
+{
+    S390CPU *cpu = s390_env_get_cpu(env);
+    int r = -1;
+
+    if (s390_has_feat(S390_FEAT_ZPCI)) {
+        qemu_mutex_lock_iothread();
+        r = mpcifc_service_call(cpu, r1, fiba, ar, GETPC());
+        qemu_mutex_unlock_iothread();
+    }
+    if (r) {
+        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
+    }
+}
+#endif
diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index df0b41606d..b73f7143db 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -4777,6 +4777,128 @@ static ExitStatus op_zero2(DisasContext *s, DisasOps *o)
     return NO_EXIT;
 }
 
+#ifndef CONFIG_USER_ONLY
+static ExitStatus op_clp(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 r2 = tcg_const_i32(get_field(s->fields, r2));
+
+    check_privileged(s);
+    gen_helper_clp(cpu_env, r2);
+    tcg_temp_free_i32(r2);
+    set_cc_static(s);
+    return NO_EXIT;
+}
+
+static ExitStatus op_pcilg(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
+    TCGv_i32 r2 = tcg_const_i32(get_field(s->fields, r2));
+
+    check_privileged(s);
+    gen_helper_pcilg(cpu_env, r1, r2);
+    tcg_temp_free_i32(r1);
+    tcg_temp_free_i32(r2);
+    set_cc_static(s);
+    return NO_EXIT;
+}
+
+static ExitStatus op_pcistg(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
+    TCGv_i32 r2 = tcg_const_i32(get_field(s->fields, r2));
+
+    check_privileged(s);
+    gen_helper_pcistg(cpu_env, r1, r2);
+    tcg_temp_free_i32(r1);
+    tcg_temp_free_i32(r2);
+    set_cc_static(s);
+    return NO_EXIT;
+}
+
+static ExitStatus op_stpcifc(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
+    int b2 = get_field(s->fields, b2);
+    int d2 = get_field(s->fields, d2);
+    TCGv_i64 addr;
+    TCGv_i32 ar;
+
+    check_privileged(s);
+    addr = get_address(s, 0, b2, d2);
+    ar = tcg_const_i32(b2);
+    gen_helper_stpcifc(cpu_env, r1, addr, ar);
+    tcg_temp_free_i64(addr);
+    tcg_temp_free_i32(ar);
+    tcg_temp_free_i32(r1);
+    set_cc_static(s);
+    return NO_EXIT;
+}
+
+static ExitStatus op_sic(DisasContext *s, DisasOps *o)
+{
+    int r1 = get_field(s->fields, r1);
+    int r3 = get_field(s->fields, r3);
+
+    check_privileged(s);
+    gen_helper_sic(cpu_env, regs[r1], regs[r3]);
+    set_cc_static(s);
+    return NO_EXIT;
+}
+
+static ExitStatus op_rpcit(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
+    TCGv_i32 r2 = tcg_const_i32(get_field(s->fields, r2));
+
+    check_privileged(s);
+    gen_helper_rpcit(cpu_env, r1, r2);
+    tcg_temp_free_i32(r1);
+    tcg_temp_free_i32(r2);
+    set_cc_static(s);
+    return NO_EXIT;
+}
+
+static ExitStatus op_pcistb(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
+    TCGv_i32 r3 = tcg_const_i32(get_field(s->fields, r3));
+    int b2 = get_field(s->fields, b2);
+    int d2 = get_field(s->fields, d2);
+    TCGv_i64 addr;
+    TCGv_i32 ar;
+
+    check_privileged(s);
+    addr = get_address(s, 0, b2, d2);
+    ar = tcg_const_i32(b2);
+    gen_helper_pcistb(cpu_env, r1, r3, addr, ar);
+    tcg_temp_free_i64(addr);
+    tcg_temp_free_i32(ar);
+    tcg_temp_free_i32(r1);
+    tcg_temp_free_i32(r3);
+    set_cc_static(s);
+    return NO_EXIT;
+}
+
+static ExitStatus op_mpcifc(DisasContext *s, DisasOps *o)
+{
+    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
+    int b2 = get_field(s->fields, b2);
+    int d2 = get_field(s->fields, d2);
+    TCGv_i64 addr;
+    TCGv_i32 ar;
+
+    check_privileged(s);
+    addr = get_address(s, 0, b2, d2);
+    ar = tcg_const_i32(b2);
+    gen_helper_mpcifc(cpu_env, r1, addr, ar);
+    tcg_temp_free_i64(addr);
+    tcg_temp_free_i32(ar);
+    tcg_temp_free_i32(r1);
+    set_cc_static(s);
+    return NO_EXIT;
+}
+#endif
+
 /* ====================================================================== */
 /* The "Cc OUTput" generators.  Given the generated output (and in some cases
    the original inputs), update the various cc data structures in order to
@@ -5708,6 +5830,7 @@ enum DisasInsnEnum {
 #define FAC_MSA4        S390_FEAT_MSA_EXT_4 /* msa-extension-4 facility */
 #define FAC_MSA5        S390_FEAT_MSA_EXT_5 /* msa-extension-5 facility */
 #define FAC_ECT         S390_FEAT_EXTRACT_CPU_TIME
+#define FAC_PCI         S390_FEAT_ZPCI /* z/PCI facility */
 
 static const DisasInsn insn_info[] = {
 #include "insn-data.def"
-- 
2.13.6

[Qemu-devel] [PATCH RFC 2/2] s390x/cpumodel: allow zpci features in qemu model

[Cornelia Huck]

AEN can be provided unconditionally, ZPCI has to be turned on
manually (it should really depend on CONFIG_PCI).

With -cpu qemu,zpci=on, a 4.15 guest kernel can now successfully
detect virtio-pci devices under tcg.

Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
 target/s390x/gen-features.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c
index 0570f597ec..db7ac965a0 100644
--- a/target/s390x/gen-features.c
+++ b/target/s390x/gen-features.c
@@ -574,6 +574,7 @@ static uint16_t qemu_LATEST[] = {
     S390_FEAT_INTERLOCKED_ACCESS_2,
     S390_FEAT_MSA_EXT_4,
     S390_FEAT_MSA_EXT_3,
+    S390_FEAT_ADAPTER_EVENT_NOTIFICATION,
 };
 
 /* add all new definitions before this point */
@@ -582,6 +583,8 @@ static uint16_t qemu_MAX[] = {
     S390_FEAT_STFLE_53,
     /* generates a dependency warning, leave it out for now */
     S390_FEAT_MSA_EXT_5,
+    /* should be conditional on CONFIG_PCI */
+    S390_FEAT_ZPCI,
 };
 
 /****** END FEATURE DEFS ******/
-- 
2.13.6

Re: [Qemu-devel] [PATCH RFC 1/2] s390x/tcg: wire up pci instructions

[David Hildenbrand]

On 29.01.2018 17:52, Cornelia Huck wrote:
> On s390x, pci support is implemented via a set of instructions
> (no mmio). Unfortunately, none of them are documented in the
> PoP; the code is based upon the existing implementation for KVM
> and the Linux zpci driver.
> 
> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
> ---
>  target/s390x/helper.h      |   9 ++++
>  target/s390x/insn-data.def |  13 +++++
>  target/s390x/misc_helper.c | 123 +++++++++++++++++++++++++++++++++++++++++++++
>  target/s390x/translate.c   | 123 +++++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 268 insertions(+)
> 
> diff --git a/target/s390x/helper.h b/target/s390x/helper.h
> index 59a1d9869b..9887efbb3a 100644
> --- a/target/s390x/helper.h
> +++ b/target/s390x/helper.h
> @@ -172,4 +172,13 @@ DEF_HELPER_2(stcrw, void, env, i64)
>  DEF_HELPER_3(stsch, void, env, i64, i64)
>  DEF_HELPER_3(tsch, void, env, i64, i64)
>  DEF_HELPER_2(chsc, void, env, i64)
> +
> +DEF_HELPER_2(clp, void, env, i32)
> +DEF_HELPER_3(pcilg, void, env, i32, i32)
> +DEF_HELPER_3(pcistg, void, env, i32, i32)
> +DEF_HELPER_4(stpcifc, void, env, i32, i64, i32)
> +DEF_HELPER_3(sic, void, env, i64, i64)
> +DEF_HELPER_3(rpcit, void, env, i32, i32)
> +DEF_HELPER_5(pcistb, void, env, i32, i32, i64, i32)
> +DEF_HELPER_4(mpcifc, void, env, i32, i64, i32)
>  #endif
> diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
> index 11ee43dcbc..2ffc051072 100644
> --- a/target/s390x/insn-data.def
> +++ b/target/s390x/insn-data.def
> @@ -1067,4 +1067,17 @@
>      /* ??? Not listed in PoO ninth edition, but there's a linux driver that
>         uses it: "A CHSC subchannel is usually present on LPAR only."  */
>      C(0xb25f, CHSC,  RRE,     Z,   0, insn, 0, 0, chsc, 0)
> +
> +/* zPCI Instructions */
> +    /* None of these instructions are documented in the PoP, so this is all
> +       based upon target/s390x/kvm.c and Linux code and likely incomplete */
> +    C(0xebd0, PCISTB, RSY_a, PCI, 0, 0, 0, 0, pcistb, 0)
> +    C(0xebd1, SIC, RSY_a, PCI, 0, 0, 0, 0, sic, 0)
> +    C(0xb9a0, CLP, RRF_c, PCI, 0, 0, 0, 0, clp, 0)
> +    C(0xb9d0, PCISTG, RRE, PCI, 0, 0, 0, 0, pcistg, 0)
> +    C(0xb9d2, PCILG, RRE, PCI, 0, 0, 0, 0, pcilg, 0)
> +    C(0xb9d3, RPCIT, RRE, PCI, 0, 0, 0, 0, rpcit, 0)
> +    C(0xe3d0, MPCIFC, RXY_a, PCI, 0, 0, 0, 0, mpcifc, 0)
> +    C(0xe3d4, STPCIFC, RXY_a, PCI, 0, 0, 0, 0, stpcifc, 0)
> +
>  #endif /* CONFIG_USER_ONLY */
> diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c
> index 86da6aab7e..1271106628 100644
> --- a/target/s390x/misc_helper.c
> +++ b/target/s390x/misc_helper.c
> @@ -36,6 +36,7 @@
>  #include "hw/s390x/ebcdic.h"
>  #include "hw/s390x/s390-virtio-hcall.h"
>  #include "hw/s390x/sclp.h"
> +#include "hw/s390x/s390-pci-inst.h"
>  #endif
>  
>  /* #define DEBUG_HELPER */
> @@ -560,3 +561,125 @@ uint32_t HELPER(stfle)(CPUS390XState *env, uint64_t addr)
>      env->regs[0] = deposit64(env->regs[0], 0, 8, (max_bytes / 8) - 1);
>      return count_bytes >= max_bytes ? 0 : 3;
>  }
> +
> +#ifndef CONFIG_USER_ONLY
> +void HELPER(clp)(CPUS390XState *env, uint32_t r2)
> +{
> +    S390CPU *cpu = s390_env_get_cpu(env);
> +    int r = -1;
> +
> +    if (s390_has_feat(S390_FEAT_ZPCI)) {
> +        qemu_mutex_lock_iothread();
> +        r = clp_service_call(cpu, r2, GETPC());
> +        qemu_mutex_unlock_iothread();
> +    }
> +    if (r) {
> +        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
> +    }

Hmmm, this handling should not be necessary for TCG. All we should need is:

qemu_mutex_lock_iothread();
r = clp_service_call(cpu, r2, GETPC());
qemu_mutex_unlock_iothread();

We will handle

a) pci not configured in patch nr2 via the CPU model (will propose
something there).

b) we will handle !s390_has_feat(S390_FEAT_ZPCI) although available
later just as other instructions via the "PCI" flag you attached to the
instructions (Richard once posted a patch to do that).

> +}
> +
> +void HELPER(pcilg)(CPUS390XState *env, uint32_t r1, uint32_t r2)
> +{
> +    S390CPU *cpu = s390_env_get_cpu(env);
> +    int r = -1;
> +
> +    if (s390_has_feat(S390_FEAT_ZPCI)) {
> +        qemu_mutex_lock_iothread();
> +        r = pcilg_service_call(cpu, r1, r2, GETPC());
> +        qemu_mutex_unlock_iothread();
> +    }
> +    if (r) {
> +        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
> +    }
> +}
> +
> +void HELPER(pcistg)(CPUS390XState *env, uint32_t r1, uint32_t r2)
> +{
> +    S390CPU *cpu = s390_env_get_cpu(env);
> +    int r = -1;
> +
> +    if (s390_has_feat(S390_FEAT_ZPCI)) {
> +        qemu_mutex_lock_iothread();
> +        r = pcistg_service_call(cpu, r1, r2, GETPC());
> +        qemu_mutex_unlock_iothread();
> +    }
> +    if (r) {
> +        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
> +    }
> +}
> +
> +void HELPER(stpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba,
> +                     uint32_t ar)
> +{
> +    S390CPU *cpu = s390_env_get_cpu(env);
> +    int r = -1;
> +
> +    if (s390_has_feat(S390_FEAT_ZPCI)) {
> +        qemu_mutex_lock_iothread();
> +        r = stpcifc_service_call(cpu, r1, fiba, ar, GETPC());
> +        qemu_mutex_unlock_iothread();
> +    }
> +    if (r) {
> +        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
> +    }
> +}
> +
> +void HELPER(sic)(CPUS390XState *env, uint64_t r1, uint64_t r3)
> +{
> +    int r;
> +
> +    qemu_mutex_lock_iothread();
> +    r = css_do_sic(env, r1 & 0xffff, (r3 >> 27) & 0x7);
> +    qemu_mutex_unlock_iothread();
> +    if (r) {
> +        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
> +    }
> +}
> +
> +void HELPER(rpcit)(CPUS390XState *env, uint32_t r1, uint32_t r2)
> +{
> +    S390CPU *cpu = s390_env_get_cpu(env);
> +    int r = -1;
> +
> +    if (s390_has_feat(S390_FEAT_ZPCI)) {
> +        qemu_mutex_lock_iothread();
> +        r = rpcit_service_call(cpu, r1, r2, GETPC());
> +        qemu_mutex_unlock_iothread();
> +    }
> +    if (r) {
> +        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
> +    }
> +}
> +
> +void HELPER(pcistb)(CPUS390XState *env, uint32_t r1, uint32_t r3,
> +                    uint64_t gaddr, uint32_t ar)
> +{
> +    S390CPU *cpu = s390_env_get_cpu(env);
> +    int r = -1;
> +
> +    if (s390_has_feat(S390_FEAT_ZPCI)) {
> +        qemu_mutex_lock_iothread();
> +        r = pcistb_service_call(cpu, r1, r3, gaddr, ar, GETPC());
> +        qemu_mutex_unlock_iothread();
> +    }
> +    if (r) {
> +        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
> +    }
> +}
> +
> +void HELPER(mpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba,
> +                    uint32_t ar)
> +{
> +    S390CPU *cpu = s390_env_get_cpu(env);
> +    int r = -1;
> +
> +    if (s390_has_feat(S390_FEAT_ZPCI)) {
> +        qemu_mutex_lock_iothread();
> +        r = mpcifc_service_call(cpu, r1, fiba, ar, GETPC());
> +        qemu_mutex_unlock_iothread();
> +    }
> +    if (r) {
> +        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
> +    }
> +}
> +#endif
> diff --git a/target/s390x/translate.c b/target/s390x/translate.c
> index df0b41606d..b73f7143db 100644
> --- a/target/s390x/translate.c
> +++ b/target/s390x/translate.c
> @@ -4777,6 +4777,128 @@ static ExitStatus op_zero2(DisasContext *s, DisasOps *o)
>      return NO_EXIT;
>  }
>  

> +
> +static ExitStatus op_stpcifc(DisasContext *s, DisasOps *o)
> +{
> +    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
> +    int b2 = get_field(s->fields, b2);
> +    int d2 = get_field(s->fields, d2);
> +    TCGv_i64 addr;
> +    TCGv_i32 ar;
> +

You can simply drop b2, d2 and addr, and instead use in1_la2 for the
input value specification:


C(0xe3d4, STPCIFC, RXY_a, PCI, la2, 0, 0, 0, stpcifc, 0)

> +    check_privileged(s);
> +    addr = get_address(s, 0, b2, d2);
> +    ar = tcg_const_i32(b2);
> +    gen_helper_stpcifc(cpu_env, r1, addr, ar);

gen_helper_stpcifc(cpu_env, r1, o->addr1, ar);

> +    tcg_temp_free_i64(addr);
> +    tcg_temp_free_i32(ar);
> +    tcg_temp_free_i32(r1);
> +    set_cc_static(s);
> +    return NO_EXIT;
> +}
> +
> +static ExitStatus op_sic(DisasContext *s, DisasOps *o)
> +{
> +    int r1 = get_field(s->fields, r1);
> +    int r3 = get_field(s->fields, r3);
> +

(these two can be const)
you could use in1_r1 and in2_r3

> +    check_privileged(s);
> +    gen_helper_sic(cpu_env, regs[r1], regs[r3]);

gen_helper_sic(cpu_env, o->in1, o->in2);

> +    set_cc_static(s);

Are you sure this instruction modifies the cc? Can't spot a set_cc when
following the kvm code.

> +    return NO_EXIT;
> +}
> +
> +static ExitStatus op_rpcit(DisasContext *s, DisasOps *o)
> +{
> +    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
> +    TCGv_i32 r2 = tcg_const_i32(get_field(s->fields, r2));
> +
> +    check_privileged(s);
> +    gen_helper_rpcit(cpu_env, r1, r2);
> +    tcg_temp_free_i32(r1);
> +    tcg_temp_free_i32(r2);
> +    set_cc_static(s);
> +    return NO_EXIT;
> +}
> +
> +static ExitStatus op_pcistb(DisasContext *s, DisasOps *o)
> +{
> +    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
> +    TCGv_i32 r3 = tcg_const_i32(get_field(s->fields, r3));
> +    int b2 = get_field(s->fields, b2);
> +    int d2 = get_field(s->fields, d2);

Dito, use in1_la2

> +    TCGv_i64 addr;
> +    TCGv_i32 ar;
> +
> +    check_privileged(s);
> +    addr = get_address(s, 0, b2, d2);
> +    ar = tcg_const_i32(b2);

And you can initialize this directly then

TCGv_i32 ar = tcg_const_i32(get_field(s->fields, b2));

... also applies to the others

> +    gen_helper_pcistb(cpu_env, r1, r3, addr, ar);
> +    tcg_temp_free_i64(addr);
> +    tcg_temp_free_i32(ar);
> +    tcg_temp_free_i32(r1);
> +    tcg_temp_free_i32(r3);
> +    set_cc_static(s);
> +    return NO_EXIT;
> +}
> +
> +static ExitStatus op_mpcifc(DisasContext *s, DisasOps *o)
> +{
> +    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
> +    int b2 = get_field(s->fields, b2);
> +    int d2 = get_field(s->fields, d2);
> +    TCGv_i64 addr;
> +    TCGv_i32 ar;
> +

dito

> +    check_privileged(s);
> +    addr = get_address(s, 0, b2, d2);
> +    ar = tcg_const_i32(b2);
> +    gen_helper_mpcifc(cpu_env, r1, addr, ar);
> +    tcg_temp_free_i64(addr);
> +    tcg_temp_free_i32(ar);
> +    tcg_temp_free_i32(r1);
> +    set_cc_static(s);
> +    return NO_EXIT;
> +}
> +#endif
> +
>  /* ====================================================================== */
>  /* The "Cc OUTput" generators.  Given the generated output (and in some cases
>     the original inputs), update the various cc data structures in order to
> @@ -5708,6 +5830,7 @@ enum DisasInsnEnum {
>  #define FAC_MSA4        S390_FEAT_MSA_EXT_4 /* msa-extension-4 facility */
>  #define FAC_MSA5        S390_FEAT_MSA_EXT_5 /* msa-extension-5 facility */
>  #define FAC_ECT         S390_FEAT_EXTRACT_CPU_TIME
> +#define FAC_PCI         S390_FEAT_ZPCI /* z/PCI facility */
>  
>  static const DisasInsn insn_info[] = {
>  #include "insn-data.def"
> 

Thanks!

-- 

Thanks,

David / dhildenb

Re: [Qemu-devel] [PATCH RFC 2/2] s390x/cpumodel: allow zpci features in qemu model

[David Hildenbrand]

On 29.01.2018 17:52, Cornelia Huck wrote:
> AEN can be provided unconditionally, ZPCI has to be turned on
> manually (it should really depend on CONFIG_PCI).
> 
> With -cpu qemu,zpci=on, a 4.15 guest kernel can now successfully
> detect virtio-pci devices under tcg.
> 
> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
> ---
>  target/s390x/gen-features.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c
> index 0570f597ec..db7ac965a0 100644
> --- a/target/s390x/gen-features.c
> +++ b/target/s390x/gen-features.c
> @@ -574,6 +574,7 @@ static uint16_t qemu_LATEST[] = {
>      S390_FEAT_INTERLOCKED_ACCESS_2,
>      S390_FEAT_MSA_EXT_4,
>      S390_FEAT_MSA_EXT_3,
> +    S390_FEAT_ADAPTER_EVENT_NOTIFICATION,
>  };
>  
>  /* add all new definitions before this point */
> @@ -582,6 +583,8 @@ static uint16_t qemu_MAX[] = {
>      S390_FEAT_STFLE_53,
>      /* generates a dependency warning, leave it out for now */
>      S390_FEAT_MSA_EXT_5,
> +    /* should be conditional on CONFIG_PCI */
> +    S390_FEAT_ZPCI,
>  };
>  

What about something in addition like that, should work for now

diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
index 212a5f0697..62fc8d538d 100644
--- a/target/s390x/cpu_models.c
+++ b/target/s390x/cpu_models.c
@@ -23,6 +23,7 @@
 #include "qapi/qmp/qbool.h"
 #ifndef CONFIG_USER_ONLY
 #include "sysemu/arch_init.h"
+#include "hw/pci/pci.h"
 #endif

 #define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \
@@ -1271,6 +1272,12 @@ static void register_types(void)

     /* init all bitmaps from gnerated data initially */
     s390_init_feat_bitmap(qemu_max_cpu_feat_init, qemu_max_cpu_feat);
+#ifndef CONFIG_USER_ONLY
+    if (!pci_available) {
+        clear_bit(S390_FEAT_ZPCI, qemu_max_cpu_feat);
+    }
+#endif
+
     for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
         s390_init_feat_bitmap(s390_cpu_defs[i].base_init,
                               s390_cpu_defs[i].base_feat);



>  /****** END FEATURE DEFS ******/
> 


-- 

Thanks,

David / dhildenb

Re: [Qemu-devel] [PATCH RFC 2/2] s390x/cpumodel: allow zpci features in qemu model

[Cornelia Huck]

On Tue, 30 Jan 2018 14:09:43 +0100
David Hildenbrand <david@redhat.com> wrote:

> On 29.01.2018 17:52, Cornelia Huck wrote:
> > AEN can be provided unconditionally, ZPCI has to be turned on
> > manually (it should really depend on CONFIG_PCI).

I think we should keep it non-default even with your suggested change.

> > 
> > With -cpu qemu,zpci=on, a 4.15 guest kernel can now successfully
> > detect virtio-pci devices under tcg.
> > 
> > Signed-off-by: Cornelia Huck <cohuck@redhat.com>
> > ---
> >  target/s390x/gen-features.c | 3 +++
> >  1 file changed, 3 insertions(+)
> > 
> > diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c
> > index 0570f597ec..db7ac965a0 100644
> > --- a/target/s390x/gen-features.c
> > +++ b/target/s390x/gen-features.c
> > @@ -574,6 +574,7 @@ static uint16_t qemu_LATEST[] = {
> >      S390_FEAT_INTERLOCKED_ACCESS_2,
> >      S390_FEAT_MSA_EXT_4,
> >      S390_FEAT_MSA_EXT_3,
> > +    S390_FEAT_ADAPTER_EVENT_NOTIFICATION,
> >  };
> >  
> >  /* add all new definitions before this point */
> > @@ -582,6 +583,8 @@ static uint16_t qemu_MAX[] = {
> >      S390_FEAT_STFLE_53,
> >      /* generates a dependency warning, leave it out for now */
> >      S390_FEAT_MSA_EXT_5,
> > +    /* should be conditional on CONFIG_PCI */
> > +    S390_FEAT_ZPCI,
> >  };
> >    
> 
> What about something in addition like that, should work for now
> 
> diff --git a/target/s390x/cpu_models.c b/target/s390x/cpu_models.c
> index 212a5f0697..62fc8d538d 100644
> --- a/target/s390x/cpu_models.c
> +++ b/target/s390x/cpu_models.c
> @@ -23,6 +23,7 @@
>  #include "qapi/qmp/qbool.h"
>  #ifndef CONFIG_USER_ONLY
>  #include "sysemu/arch_init.h"
> +#include "hw/pci/pci.h"
>  #endif
> 
>  #define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \
> @@ -1271,6 +1272,12 @@ static void register_types(void)
> 
>      /* init all bitmaps from gnerated data initially */
>      s390_init_feat_bitmap(qemu_max_cpu_feat_init, qemu_max_cpu_feat);
> +#ifndef CONFIG_USER_ONLY
> +    if (!pci_available) {
> +        clear_bit(S390_FEAT_ZPCI, qemu_max_cpu_feat);
> +    }
> +#endif
> +
>      for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
>          s390_init_feat_bitmap(s390_cpu_defs[i].base_init,
>                                s390_cpu_defs[i].base_feat);
> 
> 

That makes sense, added. Thanks!

> 
> >  /****** END FEATURE DEFS ******/
> >   
> 
> 

Re: [Qemu-devel] [PATCH RFC 1/2] s390x/tcg: wire up pci instructions

[Cornelia Huck]

On Tue, 30 Jan 2018 14:00:12 +0100
David Hildenbrand <david@redhat.com> wrote:

> On 29.01.2018 17:52, Cornelia Huck wrote:
> > On s390x, pci support is implemented via a set of instructions
> > (no mmio). Unfortunately, none of them are documented in the
> > PoP; the code is based upon the existing implementation for KVM
> > and the Linux zpci driver.
> > 
> > Signed-off-by: Cornelia Huck <cohuck@redhat.com>
> > ---
> >  target/s390x/helper.h      |   9 ++++
> >  target/s390x/insn-data.def |  13 +++++
> >  target/s390x/misc_helper.c | 123 +++++++++++++++++++++++++++++++++++++++++++++
> >  target/s390x/translate.c   | 123 +++++++++++++++++++++++++++++++++++++++++++++
> >  4 files changed, 268 insertions(+)
> > 

(...)

> > diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c
> > index 86da6aab7e..1271106628 100644
> > --- a/target/s390x/misc_helper.c
> > +++ b/target/s390x/misc_helper.c
> > @@ -36,6 +36,7 @@
> >  #include "hw/s390x/ebcdic.h"
> >  #include "hw/s390x/s390-virtio-hcall.h"
> >  #include "hw/s390x/sclp.h"
> > +#include "hw/s390x/s390-pci-inst.h"
> >  #endif
> >  
> >  /* #define DEBUG_HELPER */
> > @@ -560,3 +561,125 @@ uint32_t HELPER(stfle)(CPUS390XState *env, uint64_t addr)
> >      env->regs[0] = deposit64(env->regs[0], 0, 8, (max_bytes / 8) - 1);
> >      return count_bytes >= max_bytes ? 0 : 3;
> >  }
> > +
> > +#ifndef CONFIG_USER_ONLY
> > +void HELPER(clp)(CPUS390XState *env, uint32_t r2)
> > +{
> > +    S390CPU *cpu = s390_env_get_cpu(env);
> > +    int r = -1;
> > +
> > +    if (s390_has_feat(S390_FEAT_ZPCI)) {
> > +        qemu_mutex_lock_iothread();
> > +        r = clp_service_call(cpu, r2, GETPC());
> > +        qemu_mutex_unlock_iothread();
> > +    }
> > +    if (r) {
> > +        s390_program_interrupt(env, PGM_OPERATION, 4, GETPC());
> > +    }  
> 
> Hmmm, this handling should not be necessary for TCG. All we should need is:
> 
> qemu_mutex_lock_iothread();
> r = clp_service_call(cpu, r2, GETPC());
> qemu_mutex_unlock_iothread();
> 
> We will handle
> 
> a) pci not configured in patch nr2 via the CPU model (will propose
> something there).
> 
> b) we will handle !s390_has_feat(S390_FEAT_ZPCI) although available
> later just as other instructions via the "PCI" flag you attached to the
> instructions (Richard once posted a patch to do that).

Even better if that works. (Although I don't quite understand how the
FAC_xxx defines interact with the facilities.)

> 
> > +}

(...)

> > diff --git a/target/s390x/translate.c b/target/s390x/translate.c
> > index df0b41606d..b73f7143db 100644
> > --- a/target/s390x/translate.c
> > +++ b/target/s390x/translate.c
> > @@ -4777,6 +4777,128 @@ static ExitStatus op_zero2(DisasContext *s, DisasOps *o)
> >      return NO_EXIT;
> >  }
> >    
> 
> > +
> > +static ExitStatus op_stpcifc(DisasContext *s, DisasOps *o)
> > +{
> > +    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
> > +    int b2 = get_field(s->fields, b2);
> > +    int d2 = get_field(s->fields, d2);
> > +    TCGv_i64 addr;
> > +    TCGv_i32 ar;
> > +  
> 
> You can simply drop b2, d2 and addr, and instead use in1_la2 for the
> input value specification:
> 
> 
> C(0xe3d4, STPCIFC, RXY_a, PCI, la2, 0, 0, 0, stpcifc, 0)
> 
> > +    check_privileged(s);
> > +    addr = get_address(s, 0, b2, d2);
> > +    ar = tcg_const_i32(b2);
> > +    gen_helper_stpcifc(cpu_env, r1, addr, ar);  
> 
> gen_helper_stpcifc(cpu_env, r1, o->addr1, ar);
> 
> > +    tcg_temp_free_i64(addr);
> > +    tcg_temp_free_i32(ar);
> > +    tcg_temp_free_i32(r1);
> > +    set_cc_static(s);
> > +    return NO_EXIT;
> > +}
> > +
> > +static ExitStatus op_sic(DisasContext *s, DisasOps *o)
> > +{
> > +    int r1 = get_field(s->fields, r1);
> > +    int r3 = get_field(s->fields, r3);
> > +  
> 
> (these two can be const)
> you could use in1_r1 and in2_r3
> 
> > +    check_privileged(s);
> > +    gen_helper_sic(cpu_env, regs[r1], regs[r3]);  
> 
> gen_helper_sic(cpu_env, o->in1, o->in2);
> 
> > +    set_cc_static(s);  
> 
> Are you sure this instruction modifies the cc? Can't spot a set_cc when
> following the kvm code.

Ah, you're right. The kernel insn agrees as well.

> 
> > +    return NO_EXIT;
> > +}
> > +
> > +static ExitStatus op_rpcit(DisasContext *s, DisasOps *o)
> > +{
> > +    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
> > +    TCGv_i32 r2 = tcg_const_i32(get_field(s->fields, r2));
> > +
> > +    check_privileged(s);
> > +    gen_helper_rpcit(cpu_env, r1, r2);
> > +    tcg_temp_free_i32(r1);
> > +    tcg_temp_free_i32(r2);
> > +    set_cc_static(s);
> > +    return NO_EXIT;
> > +}
> > +
> > +static ExitStatus op_pcistb(DisasContext *s, DisasOps *o)
> > +{
> > +    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
> > +    TCGv_i32 r3 = tcg_const_i32(get_field(s->fields, r3));
> > +    int b2 = get_field(s->fields, b2);
> > +    int d2 = get_field(s->fields, d2);  
> 
> Dito, use in1_la2
> 
> > +    TCGv_i64 addr;
> > +    TCGv_i32 ar;
> > +
> > +    check_privileged(s);
> > +    addr = get_address(s, 0, b2, d2);
> > +    ar = tcg_const_i32(b2);  
> 
> And you can initialize this directly then
> 
> TCGv_i32 ar = tcg_const_i32(get_field(s->fields, b2));
> 
> ... also applies to the others
> 
> > +    gen_helper_pcistb(cpu_env, r1, r3, addr, ar);
> > +    tcg_temp_free_i64(addr);
> > +    tcg_temp_free_i32(ar);
> > +    tcg_temp_free_i32(r1);
> > +    tcg_temp_free_i32(r3);
> > +    set_cc_static(s);
> > +    return NO_EXIT;
> > +}
> > +
> > +static ExitStatus op_mpcifc(DisasContext *s, DisasOps *o)
> > +{
> > +    TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
> > +    int b2 = get_field(s->fields, b2);
> > +    int d2 = get_field(s->fields, d2);
> > +    TCGv_i64 addr;
> > +    TCGv_i32 ar;
> > +  
> 
> dito

OK, I'll update all these.

> 
> > +    check_privileged(s);
> > +    addr = get_address(s, 0, b2, d2);
> > +    ar = tcg_const_i32(b2);
> > +    gen_helper_mpcifc(cpu_env, r1, addr, ar);
> > +    tcg_temp_free_i64(addr);
> > +    tcg_temp_free_i32(ar);
> > +    tcg_temp_free_i32(r1);
> > +    set_cc_static(s);
> > +    return NO_EXIT;
> > +}
> > +#endif
> > +
> >  /* ====================================================================== */
> >  /* The "Cc OUTput" generators.  Given the generated output (and in some cases
> >     the original inputs), update the various cc data structures in order to
> > @@ -5708,6 +5830,7 @@ enum DisasInsnEnum {
> >  #define FAC_MSA4        S390_FEAT_MSA_EXT_4 /* msa-extension-4 facility */
> >  #define FAC_MSA5        S390_FEAT_MSA_EXT_5 /* msa-extension-5 facility */
> >  #define FAC_ECT         S390_FEAT_EXTRACT_CPU_TIME
> > +#define FAC_PCI         S390_FEAT_ZPCI /* z/PCI facility */
> >  
> >  static const DisasInsn insn_info[] = {
> >  #include "insn-data.def"
> >   
> 
> Thanks!

No, thanks from me :)

Re: [Qemu-devel] [PATCH RFC 1/2] s390x/tcg: wire up pci instructions

[Cornelia Huck]

On Tue, 30 Jan 2018 14:00:12 +0100
David Hildenbrand <david@redhat.com> wrote:

> On 29.01.2018 17:52, Cornelia Huck wrote:
> > On s390x, pci support is implemented via a set of instructions
> > (no mmio). Unfortunately, none of them are documented in the
> > PoP; the code is based upon the existing implementation for KVM
> > and the Linux zpci driver.
> > 
> > Signed-off-by: Cornelia Huck <cohuck@redhat.com>
> > ---
> >  target/s390x/helper.h      |   9 ++++
> >  target/s390x/insn-data.def |  13 +++++
> >  target/s390x/misc_helper.c | 123 +++++++++++++++++++++++++++++++++++++++++++++
> >  target/s390x/translate.c   | 123 +++++++++++++++++++++++++++++++++++++++++++++
> >  4 files changed, 268 insertions(+)
> > 

> > diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
> > index 11ee43dcbc..2ffc051072 100644
> > --- a/target/s390x/insn-data.def
> > +++ b/target/s390x/insn-data.def
> > @@ -1067,4 +1067,17 @@
> >      /* ??? Not listed in PoO ninth edition, but there's a linux driver that
> >         uses it: "A CHSC subchannel is usually present on LPAR only."  */
> >      C(0xb25f, CHSC,  RRE,     Z,   0, insn, 0, 0, chsc, 0)
> > +
> > +/* zPCI Instructions */
> > +    /* None of these instructions are documented in the PoP, so this is all
> > +       based upon target/s390x/kvm.c and Linux code and likely incomplete */
> > +    C(0xebd0, PCISTB, RSY_a, PCI, 0, 0, 0, 0, pcistb, 0)
> > +    C(0xebd1, SIC, RSY_a, PCI, 0, 0, 0, 0, sic, 0)
> > +    C(0xb9a0, CLP, RRF_c, PCI, 0, 0, 0, 0, clp, 0)
> > +    C(0xb9d0, PCISTG, RRE, PCI, 0, 0, 0, 0, pcistg, 0)
> > +    C(0xb9d2, PCILG, RRE, PCI, 0, 0, 0, 0, pcilg, 0)
> > +    C(0xb9d3, RPCIT, RRE, PCI, 0, 0, 0, 0, rpcit, 0)
> > +    C(0xe3d0, MPCIFC, RXY_a, PCI, 0, 0, 0, 0, mpcifc, 0)
> > +    C(0xe3d4, STPCIFC, RXY_a, PCI, 0, 0, 0, 0, stpcifc, 0)
> > +
> >  #endif /* CONFIG_USER_ONLY */

> b) we will handle !s390_has_feat(S390_FEAT_ZPCI) although available
> later just as other instructions via the "PCI" flag you attached to the
> instructions (Richard once posted a patch to do that).

> > @@ -5708,6 +5830,7 @@ enum DisasInsnEnum {
> >  #define FAC_MSA4        S390_FEAT_MSA_EXT_4 /* msa-extension-4 facility */
> >  #define FAC_MSA5        S390_FEAT_MSA_EXT_5 /* msa-extension-5 facility */
> >  #define FAC_ECT         S390_FEAT_EXTRACT_CPU_TIME
> > +#define FAC_PCI         S390_FEAT_ZPCI /* z/PCI facility */

Thinking again: We should probably not attach the PCI flag to SIC, it
is independent of it (although only in use for pci adapters right now).