Commit: f38a71b01f839c7b65ea73ddd507903cb9489ed6 - qemu (git)

Commit MetaInfo

• Revisión: f38a71b01f839c7b65ea73ddd507903cb9489ed6 (tree)
• Tiempo: 2020-01-10 22:19:34
• Autor: Peter Maydell <peter.maydell@lina...>
• Commiter: Peter Maydell

Log Message

Testing fixes and semiconsole support:

- build fix (missing x86-iommu stubs)
- python fixes for freebsd and OSX
- nicer reporting of acceptance failures
- fix build nesting of fp-test (breaks bsds)
- semihosting clean-ups
- support for blocking semihosting console

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Merge remote-tracking branch 'remotes/stsquad/tags/pull-testing-and-semihosting-090120-2' into staging

Testing fixes and semiconsole support:

- build fix (missing x86-iommu stubs)
- python fixes for freebsd and OSX
- nicer reporting of acceptance failures
- fix build nesting of fp-test (breaks bsds)
- semihosting clean-ups
- support for blocking semihosting console

# gpg: Signature made Thu 09 Jan 2020 11:42:51 GMT
# gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <[e-mail]>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44

* remotes/stsquad/tags/pull-testing-and-semihosting-090120-2:

tests/tcg: add user version of dumb-as-bricks semiconsole test
tests/tcg: extract semi_call into a header and expand
tests/tcg: add a dumb-as-bricks semihosting console test
semihosting: add qemu_semihosting_console_inc for SYS_READC
target/arm: only update pc after semihosting completes
target/arm: remove unused EXCP_SEMIHOST leg
testing: don't nest build for fp-test
travis.yml: install homebrew python for OS X
travis.yml: duplicate before_script for MacOSX
travis.yml: Detach build and test steps
travis.yml: avocado: Print logs of non-pass tests only
freebsd: use python37
tests/vm: update openbsd to release 6.6
hw/i386/x86-iommu: Add missing stubs

Signed-off-by: Peter Maydell <[e-mail]>

Cambiar Resumen

• modified: .travis.yml
• modified: hw/i386/x86-iommu-stub.c
• modified: hw/semihosting/console.c
• modified: include/hw/semihosting/console.h
• modified: include/hw/semihosting/semihost.h
• modified: linux-user/aarch64/cpu_loop.c
• modified: linux-user/arm/cpu_loop.c
• modified: linux-user/arm/semihost.c
• modified: stubs/semihost.c
• modified: target/arm/arm-semi.c
• modified: target/arm/helper.c
• modified: target/arm/m_helper.c
• modified: target/arm/translate-a64.c
• modified: target/arm/translate.c
• modified: tests/Makefile.include
• modified: tests/fp/Makefile
• modified: tests/tcg/aarch64/Makefile.softmmu-target
• modified: tests/tcg/aarch64/Makefile.target
• add: tests/tcg/aarch64/system/semiconsole.c
• modified: tests/tcg/arm/Makefile.target
• add: tests/tcg/arm/semicall.h
• add: tests/tcg/arm/semiconsole.c
• modified: tests/tcg/arm/semihosting.c
• modified: tests/vm/freebsd
• modified: tests/vm/openbsd
• modified: vl.c

Diferencia incremental

--- a/.travis.yml
+++ b/.travis.yml
@@ -51,13 +51,6 @@ addons:
       - sparse
       - uuid-dev
       - gcovr
-  homebrew:
-    packages:
-      - ccache
-      - glib
-      - pixman
-      - gnu-sed
-    update: true
 
 
 # The channel name "irc.oftc.net#qemu" is encrypted against qemu/qemu
@@ -89,12 +82,12 @@ git:
 
 
 before_script:
-  - if [ "$TRAVIS_OS_NAME" == "osx" ] ; then export PATH="/usr/local/opt/ccache/libexec:$PATH" ; fi
   - if command -v ccache ; then ccache --zero-stats ; fi
   - mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR}
   - ${SRC_DIR}/configure ${BASE_CONFIG} ${CONFIG} || { cat config.log && exit 1; }
 script:
-  - make -j3 && travis_retry ${TEST_CMD}
+  - BUILD_RC=0 && make -j3 || BUILD_RC=$?
+  - if [ "$BUILD_RC" -eq 0 ] ; then travis_retry ${TEST_CMD} ; else $(exit $BUILD_RC); fi
 after_script:
   - if command -v ccache ; then ccache --show-stats ; fi
 
@@ -239,6 +232,21 @@ matrix:
       os: osx
       osx_image: xcode10.3
       compiler: clang
+      addons:
+        homebrew:
+          packages:
+            - ccache
+            - glib
+            - pixman
+            - gnu-sed
+            - python
+          update: true
+      before_script:
+        - brew link --overwrite python
+        - export PATH="/usr/local/opt/ccache/libexec:$PATH"
+        - if command -v ccache ; then ccache --zero-stats ; fi
+        - mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR}
+        - ${SRC_DIR}/configure ${BASE_CONFIG} ${CONFIG} || { cat config.log && exit 1; }
 
 
     # Python builds
@@ -262,8 +270,8 @@ matrix:
     - env:
         - CONFIG="--python=/usr/bin/python3 --target-list=x86_64-softmmu,mips-softmmu,mips64el-softmmu,aarch64-softmmu,arm-softmmu,s390x-softmmu,alpha-softmmu,ppc-softmmu,ppc64-softmmu,m68k-softmmu,sparc-softmmu"
         - TEST_CMD="make check-acceptance"
-      after_failure:
-        - cat tests/results/latest/job.log
+      after_script:
+        - python3 -c 'import json; r = json.load(open("tests/results/latest/results.json")); [print(t["logfile"]) for t in r["tests"] if t["status"] not in ("PASS", "SKIP")]' | xargs cat
       addons:
         apt:
           packages:

--- a/hw/i386/x86-iommu-stub.c
+++ b/hw/i386/x86-iommu-stub.c
@@ -32,3 +32,12 @@ X86IOMMUState *x86_iommu_get_default(void)
     return NULL;
 }
 
+bool x86_iommu_ir_supported(X86IOMMUState *s)
+{
+    return false;
+}
+
+IommuType x86_iommu_get_type(void)
+{
+    abort();
+}

--- a/hw/semihosting/console.c
+++ b/hw/semihosting/console.c
@@ -20,8 +20,15 @@
 #include "hw/semihosting/semihost.h"
 #include "hw/semihosting/console.h"
 #include "exec/gdbstub.h"
+#include "exec/exec-all.h"
 #include "qemu/log.h"
 #include "chardev/char.h"
+#include <pthread.h>
+#include "chardev/char-fe.h"
+#include "sysemu/sysemu.h"
+#include "qemu/main-loop.h"
+#include "qapi/error.h"
+#include "qemu/fifo8.h"
 
 int qemu_semihosting_log_out(const char *s, int len)
 {
@@ -98,3 +105,75 @@ void qemu_semihosting_console_outc(CPUArchState *env, target_ulong addr)
                       __func__, addr);
     }
 }
+
+#define FIFO_SIZE   1024
+
+/* Access to this structure is protected by the BQL */
+typedef struct SemihostingConsole {
+    CharBackend         backend;
+    GSList              *sleeping_cpus;
+    bool                got;
+    Fifo8               fifo;
+} SemihostingConsole;
+
+static SemihostingConsole console;
+
+static int console_can_read(void *opaque)
+{
+    SemihostingConsole *c = opaque;
+    int ret;
+    g_assert(qemu_mutex_iothread_locked());
+    ret = (int) fifo8_num_free(&c->fifo);
+    return ret;
+}
+
+static void console_wake_up(gpointer data, gpointer user_data)
+{
+    CPUState *cs = (CPUState *) data;
+    /* cpu_handle_halt won't know we have work so just unbung here */
+    cs->halted = 0;
+    qemu_cpu_kick(cs);
+}
+
+static void console_read(void *opaque, const uint8_t *buf, int size)
+{
+    SemihostingConsole *c = opaque;
+    g_assert(qemu_mutex_iothread_locked());
+    while (size-- && !fifo8_is_full(&c->fifo)) {
+        fifo8_push(&c->fifo, *buf++);
+    }
+    g_slist_foreach(c->sleeping_cpus, console_wake_up, NULL);
+    c->sleeping_cpus = NULL;
+}
+
+target_ulong qemu_semihosting_console_inc(CPUArchState *env)
+{
+    uint8_t ch;
+    SemihostingConsole *c = &console;
+    g_assert(qemu_mutex_iothread_locked());
+    g_assert(current_cpu);
+    if (fifo8_is_empty(&c->fifo)) {
+        c->sleeping_cpus = g_slist_prepend(c->sleeping_cpus, current_cpu);
+        current_cpu->halted = 1;
+        current_cpu->exception_index = EXCP_HALTED;
+        cpu_loop_exit(current_cpu);
+        /* never returns */
+    }
+    ch = fifo8_pop(&c->fifo);
+    return (target_ulong) ch;
+}
+
+void qemu_semihosting_console_init(void)
+{
+    Chardev *chr = semihosting_get_chardev();
+
+    if  (chr) {
+        fifo8_create(&console.fifo, FIFO_SIZE);
+        qemu_chr_fe_init(&console.backend, chr, &error_abort);
+        qemu_chr_fe_set_handlers(&console.backend,
+                                 console_can_read,
+                                 console_read,
+                                 NULL, NULL, &console,
+                                 NULL, true);
+    }
+}

--- a/include/hw/semihosting/console.h
+++ b/include/hw/semihosting/console.h
@@ -38,6 +38,22 @@ int qemu_semihosting_console_outs(CPUArchState *env, target_ulong s);
 void qemu_semihosting_console_outc(CPUArchState *env, target_ulong c);
 
 /**
+ * qemu_semihosting_console_inc:
+ * @env: CPUArchState
+ *
+ * Receive single character from debug console. This may be the remote
+ * gdb session if a softmmu guest is currently being debugged. As this
+ * call may block if no data is available we suspend the CPU and will
+ * re-execute the instruction when data is there. Therefore two
+ * conditions must be met:
+ *   - CPUState is synchronized before calling this function
+ *   - pc is only updated once the character is successfully returned
+ *
+ * Returns: character read OR cpu_loop_exit!
+ */
+target_ulong qemu_semihosting_console_inc(CPUArchState *env);
+
+/**
  * qemu_semihosting_log_out:
  * @s: pointer to string
  * @len: length of string

--- a/include/hw/semihosting/semihost.h
+++ b/include/hw/semihosting/semihost.h
@@ -56,6 +56,9 @@ static inline Chardev *semihosting_get_chardev(void)
 {
     return NULL;
 }
+static inline void qemu_semihosting_console_init(void)
+{
+}
 #else /* !CONFIG_USER_ONLY */
 bool semihosting_enabled(void);
 SemihostingTarget semihosting_get_target(void);
@@ -68,6 +71,7 @@ Chardev *semihosting_get_chardev(void);
 void qemu_semihosting_enable(void);
 int qemu_semihosting_config_options(const char *opt);
 void qemu_semihosting_connect_chardevs(void);
+void qemu_semihosting_console_init(void);
 #endif /* CONFIG_USER_ONLY */
 
 #endif /* SEMIHOST_H */

--- a/linux-user/aarch64/cpu_loop.c
+++ b/linux-user/aarch64/cpu_loop.c
@@ -130,6 +130,7 @@ void cpu_loop(CPUARMState *env)
             break;
         case EXCP_SEMIHOST:
             env->xregs[0] = do_arm_semihosting(env);
+            env->pc += 4;
             break;
         case EXCP_YIELD:
             /* nothing to do here for user-mode, just resume guest code */

--- a/linux-user/arm/cpu_loop.c
+++ b/linux-user/arm/cpu_loop.c
@@ -377,6 +377,7 @@ void cpu_loop(CPUARMState *env)
             break;
         case EXCP_SEMIHOST:
             env->regs[0] = do_arm_semihosting(env);
+            env->regs[15] += env->thumb ? 2 : 4;
             break;
         case EXCP_INTERRUPT:
             /* just indicate that signals should be handled asap */

--- a/linux-user/arm/semihost.c
+++ b/linux-user/arm/semihost.c
@@ -14,6 +14,7 @@
 #include "cpu.h"
 #include "hw/semihosting/console.h"
 #include "qemu.h"
+#include <termios.h>
 
 int qemu_semihosting_console_outs(CPUArchState *env, target_ulong addr)
 {
@@ -47,3 +48,29 @@ void qemu_semihosting_console_outc(CPUArchState *env, target_ulong addr)
         }
     }
 }
+
+/*
+ * For linux-user we can safely block. However as we want to return as
+ * soon as a character is read we need to tweak the termio to disable
+ * line buffering. We restore the old mode afterwards in case the
+ * program is expecting more normal behaviour. This is slow but
+ * nothing using semihosting console reading is expecting to be fast.
+ */
+target_ulong qemu_semihosting_console_inc(CPUArchState *env)
+{
+    uint8_t c;
+    struct termios old_tio, new_tio;
+
+    /* Disable line-buffering and echo */
+    tcgetattr(STDIN_FILENO, &old_tio);
+    new_tio = old_tio;
+    new_tio.c_lflag &= (~ICANON & ~ECHO);
+    tcsetattr(STDIN_FILENO, TCSANOW, &new_tio);
+
+    c = getchar();
+
+    /* restore config */
+    tcsetattr(STDIN_FILENO, TCSANOW, &old_tio);
+
+    return (target_ulong) c;
+}

--- a/stubs/semihost.c
+++ b/stubs/semihost.c
@@ -69,3 +69,7 @@ void semihosting_arg_fallback(const char *file, const char *cmd)
 void qemu_semihosting_connect_chardevs(void)
 {
 }
+
+void qemu_semihosting_console_init(void)
+{
+}

--- a/target/arm/arm-semi.c
+++ b/target/arm/arm-semi.c
@@ -802,8 +802,7 @@ target_ulong do_arm_semihosting(CPUARMState *env)
 
         return guestfd_fns[gf->type].readfn(cpu, gf, arg1, len);
     case TARGET_SYS_READC:
-        qemu_log_mask(LOG_UNIMP, "%s: SYS_READC not implemented", __func__);
-        return 0;
+        return qemu_semihosting_console_inc(env);
     case TARGET_SYS_ISTTY:
         GET_ARG(0);
 

--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -8566,12 +8566,6 @@ static void arm_cpu_do_interrupt_aarch64(CPUState *cs)
     case EXCP_VFIQ:
         addr += 0x100;
         break;
-    case EXCP_SEMIHOST:
-        qemu_log_mask(CPU_LOG_INT,
-                      "...handling as semihosting call 0x%" PRIx64 "\n",
-                      env->xregs[0]);
-        env->xregs[0] = do_arm_semihosting(env);
-        return;
     default:
         cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
     }
@@ -8620,11 +8614,13 @@ static void handle_semihosting(CPUState *cs)
                       "...handling as semihosting call 0x%" PRIx64 "\n",
                       env->xregs[0]);
         env->xregs[0] = do_arm_semihosting(env);
+        env->pc += 4;
     } else {
         qemu_log_mask(CPU_LOG_INT,
                       "...handling as semihosting call 0x%x\n",
                       env->regs[0]);
         env->regs[0] = do_arm_semihosting(env);
+        env->regs[15] += env->thumb ? 2 : 4;
     }
 }
 #endif

--- a/target/arm/m_helper.c
+++ b/target/arm/m_helper.c
@@ -2185,6 +2185,7 @@ void arm_v7m_cpu_do_interrupt(CPUState *cs)
                       "...handling as semihosting call 0x%x\n",
                       env->regs[0]);
         env->regs[0] = do_arm_semihosting(env);
+        env->regs[15] += env->thumb ? 2 : 4;
         return;
     case EXCP_BKPT:
         armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG, false);

--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -1937,7 +1937,7 @@ static void disas_exc(DisasContext *s, uint32_t insn)
                 break;
             }
 #endif
-            gen_exception_internal_insn(s, s->base.pc_next, EXCP_SEMIHOST);
+            gen_exception_internal_insn(s, s->pc_curr, EXCP_SEMIHOST);
         } else {
             unsupported_encoding(s, insn);
         }

--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -1124,7 +1124,7 @@ static inline void gen_hlt(DisasContext *s, int imm)
         s->current_el != 0 &&
 #endif
         (imm == (s->thumb ? 0x3c : 0xf000))) {
-        gen_exception_internal_insn(s, s->base.pc_next, EXCP_SEMIHOST);
+        gen_exception_internal_insn(s, s->pc_curr, EXCP_SEMIHOST);
         return;
     }
 
@@ -8457,7 +8457,7 @@ static bool trans_BKPT(DisasContext *s, arg_BKPT *a)
         !IS_USER(s) &&
 #endif
         (a->imm == 0xab)) {
-        gen_exception_internal_insn(s, s->base.pc_next, EXCP_SEMIHOST);
+        gen_exception_internal_insn(s, s->pc_curr, EXCP_SEMIHOST);
     } else {
         gen_exception_bkpt_insn(s, syn_aa32_bkpt(a->imm, false));
     }
@@ -10266,7 +10266,7 @@ static bool trans_SVC(DisasContext *s, arg_SVC *a)
         !IS_USER(s) &&
 #endif
         (a->imm == semihost_imm)) {
-        gen_exception_internal_insn(s, s->base.pc_next, EXCP_SEMIHOST);
+        gen_exception_internal_insn(s, s->pc_curr, EXCP_SEMIHOST);
     } else {
         gen_set_pc_im(s, s->base.pc_next);
         s->svc_imm = a->imm;

--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -969,7 +969,7 @@ FP_TEST_BIN=$(BUILD_DIR)/tests/fp/fp-test
 
 # the build dir is created by configure
 .PHONY: $(FP_TEST_BIN)
-$(FP_TEST_BIN):
+$(FP_TEST_BIN): config-host.h $(test-util-obj-y)
 	$(call quiet-command, \
 	 	$(MAKE) $(SUBDIR_MAKEFLAGS) -C $(dir $@) V="$(V)" $(notdir $@), \
 	         "BUILD", "$(notdir $@)")

--- a/tests/fp/Makefile
+++ b/tests/fp/Makefile
@@ -554,15 +554,13 @@ TF_OBJS_LIB += $(TF_OBJS_TEST)
 
 BINARIES := fp-test$(EXESUF) fp-bench$(EXESUF)
 
-# everything depends on config-host.h because platform.h includes it
-all: $(BUILD_DIR)/config-host.h
-	$(MAKE) $(BINARIES)
+# We require artefacts from the main build including config-host.h
+# because platform.h includes it. Rather than re-invoking the main
+# build we just error out if things aren't there.
+$(LIBQEMUUTIL) $(BUILD_DIR)/config-host.h:
+	$(error $@ missing, re-run parent build)
 
-$(LIBQEMUUTIL):
-	$(MAKE) -C $(BUILD_DIR) libqemuutil.a
-
-$(BUILD_DIR)/config-host.h:
-	$(MAKE) -C $(BUILD_DIR) config-host.h
+all: $(BUILD_DIR)/config-host.h $(BINARIES)
 
 # libtestfloat.a depends on libsoftfloat.a, so specify it first
 FP_TEST_LIBS := libtestfloat.a libsoftfloat.a $(LIBQEMUUTIL)

--- a/tests/tcg/aarch64/Makefile.softmmu-target
+++ b/tests/tcg/aarch64/Makefile.softmmu-target
@@ -31,7 +31,16 @@ LDFLAGS+=-static -nostdlib $(CRT_OBJS) $(MINILIB_OBJS) -lgcc
 memory: CFLAGS+=-DCHECK_UNALIGNED=1
 
 # Running
-QEMU_OPTS+=-M virt -cpu max -display none -semihosting-config enable=on,target=native,chardev=output -kernel
+QEMU_BASE_MACHINE=-M virt -cpu max -display none
+QEMU_OPTS+=$(QEMU_BASE_MACHINE) -semihosting-config enable=on,target=native,chardev=output -kernel
+
+# console test is manual only
+QEMU_SEMIHOST=-chardev stdio,mux=on,id=stdio0 -semihosting-config enable=on,chardev=stdio0 -mon chardev=stdio0,mode=readline
+run-semiconsole: QEMU_OPTS=$(QEMU_BASE_MACHINE) $(QEMU_SEMIHOST)  -kernel
+run-semiconsole: semiconsole
+	$(call skip-test, $<, "MANUAL ONLY")
+run-plugin-semiconsole-with-%: semiconsole
+	$(call skip-test, $<, "MANUAL ONLY")
 
 # Simple Record/Replay Test
 .PHONY: memory-record

--- a/tests/tcg/aarch64/Makefile.target
+++ b/tests/tcg/aarch64/Makefile.target
@@ -32,4 +32,11 @@ run-plugin-semihosting-with-%:
 		 $(call strip-plugin,$<) 2> $<.err, \
 		"$< on $(TARGET_NAME) with $*")
 
+AARCH64_TESTS += semiconsole
+run-semiconsole: semiconsole
+	$(call skip-test, $<, "MANUAL ONLY")
+
+run-plugin-semiconsole-with-%:
+	$(call skip-test, $<, "MANUAL ONLY")
+
 TESTS += $(AARCH64_TESTS)

--- /dev/null
+++ b/tests/tcg/aarch64/system/semiconsole.c
@@ -0,0 +1,38 @@
+/*
+ * Semihosting Console Test
+ *
+ * Copyright (c) 2019 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <inttypes.h>
+#include <minilib.h>
+
+#define SYS_READC 0x7
+
+uintptr_t __semi_call(uintptr_t type, uintptr_t arg0)
+{
+    register uintptr_t t asm("x0") = type;
+    register uintptr_t a0 asm("x1") = arg0;
+    asm("hlt 0xf000"
+        : "=r" (t)
+        : "r" (t), "r" (a0));
+
+    return t;
+}
+
+int main(void)
+{
+    char c;
+
+    ml_printf("Semihosting Console Test\n");
+    ml_printf("hit X to exit:");
+
+    do {
+        c = __semi_call(SYS_READC, 0);
+        __sys_outc(c);
+    } while (c != 'X');
+
+    return 0;
+}

--- a/tests/tcg/arm/Makefile.target
+++ b/tests/tcg/arm/Makefile.target
@@ -31,15 +31,43 @@ run-fcvt: fcvt
 
 # Semihosting smoke test for linux-user
 ARM_TESTS += semihosting
+semihosting: CFLAGS += -mthumb
 run-semihosting: semihosting
 	$(call run-test,$<,$(QEMU) $< 2> $<.err, "$< on $(TARGET_NAME)")
 
+ARM_TESTS += semihosting-arm
+semihosting-arm: CFLAGS += -marm
+semihosting-arm: semihosting.c
+	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $< -o $@ $(LDFLAGS)
+
+run-semihosting-arm: semihosting-arm
+	$(call run-test,$<,$(QEMU) $< 2> $<.err, "$< on $(TARGET_NAME)")
+
 run-plugin-semihosting-with-%:
 	$(call run-test, $@, $(QEMU) $(QEMU_OPTS) \
 		-plugin $(PLUGIN_DIR)/$(call extract-plugin,$@) \
 		 $(call strip-plugin,$<) 2> $<.err, \
 		"$< on $(TARGET_NAME) with $*")
 
+ARM_TESTS += semiconsole semiconsole-arm
+
+semiconsole: CFLAGS += -mthumb
+run-semiconsole: semiconsole
+	$(call skip-test, $<, "MANUAL ONLY")
+
+run-plugin-semiconsole-with-%:
+	$(call skip-test, $<, "MANUAL ONLY")
+
+semiconsole-arm: CFLAGS += -marm
+semiconsole-arm: semiconsole.c
+	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $< -o $@ $(LDFLAGS)
+
+run-semiconsole-arm: semiconsole-arm
+	$(call skip-test, $<, "MANUAL ONLY")
+
+run-plugin-semiconsole-arm-with-%:
+	$(call skip-test, $<, "MANUAL ONLY")
+
 TESTS += $(ARM_TESTS)
 
 # On ARM Linux only supports 4k pages

--- /dev/null
+++ b/tests/tcg/arm/semicall.h
@@ -0,0 +1,35 @@
+/*
+ * Semihosting Tests
+ *
+ * Copyright (c) 2019
+ * Written by Alex Bennée <[e-mail]>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#define SYS_WRITE0      0x04
+#define SYS_READC       0x07
+#define SYS_REPORTEXC   0x18
+
+uintptr_t __semi_call(uintptr_t type, uintptr_t arg0)
+{
+#if defined(__arm__)
+    register uintptr_t t asm("r0") = type;
+    register uintptr_t a0 asm("r1") = arg0;
+#ifdef __thumb__
+#  define SVC  "svc 0xab"
+#else
+#  define SVC  "svc 0x123456"
+#endif
+    asm(SVC : "=r" (t)
+        : "r" (t), "r" (a0));
+#else
+    register uintptr_t t asm("x0") = type;
+    register uintptr_t a0 asm("x1") = arg0;
+    asm("hlt 0xf000"
+        : "=r" (t)
+        : "r" (t), "r" (a0));
+#endif
+
+    return t;
+}

--- /dev/null
+++ b/tests/tcg/arm/semiconsole.c
@@ -0,0 +1,27 @@
+/*
+ * linux-user semihosting console
+ *
+ * Copyright (c) 2019
+ * Written by Alex Bennée <[e-mail]>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include "semicall.h"
+
+int main(void)
+{
+    char c;
+
+    printf("Semihosting Console Test\n");
+    printf("hit X to exit:");
+
+    do {
+        c = __semi_call(SYS_READC, 0);
+        printf("got '%c'\n", c);
+    } while (c != 'X');
+
+    return 0;
+}

--- a/tests/tcg/arm/semihosting.c
+++ b/tests/tcg/arm/semihosting.c
@@ -8,26 +8,7 @@
  */
 
 #include <stdint.h>
-
-#define SYS_WRITE0      0x04
-#define SYS_REPORTEXC   0x18
-
-void __semi_call(uintptr_t type, uintptr_t arg0)
-{
-#if defined(__arm__)
-    register uintptr_t t asm("r0") = type;
-    register uintptr_t a0 asm("r1") = arg0;
-    asm("svc 0xab"
-        : /* no return */
-        : "r" (t), "r" (a0));
-#else
-    register uintptr_t t asm("x0") = type;
-    register uintptr_t a0 asm("x1") = arg0;
-    asm("hlt 0xf000"
-        : /* no return */
-        : "r" (t), "r" (a0));
-#endif
-}
+#include "semicall.h"
 
 int main(int argc, char *argv[argc])
 {

--- a/tests/vm/freebsd
+++ b/tests/vm/freebsd
@@ -32,6 +32,7 @@ class FreeBSDVM(basevm.BaseVM):
         "git",
         "pkgconf",
         "bzip2",
+        "python37",
 
         # gnu tools
         "bash",
@@ -63,7 +64,7 @@ class FreeBSDVM(basevm.BaseVM):
         mkdir src build; cd src;
         tar -xf /dev/vtbd1;
         cd ../build
-        ../src/configure --python=python3.6 {configure_opts};
+        ../src/configure --python=python3.7 {configure_opts};
         gmake --output-sync -j{jobs} {target} {verbose};
     """
 

--- a/tests/vm/openbsd
+++ b/tests/vm/openbsd
@@ -22,8 +22,8 @@ class OpenBSDVM(basevm.BaseVM):
     name = "openbsd"
     arch = "x86_64"
 
-    link = "https://cdn.openbsd.org/pub/OpenBSD/6.5/amd64/install65.iso"
-    csum = "38d1f8cadd502f1c27bf05c5abde6cc505dd28f3f34f8a941048ff9a54f9f608"
+    link = "https://cdn.openbsd.org/pub/OpenBSD/6.6/amd64/install66.iso"
+    csum = "b22e63df56e6266de6bbeed8e9be0fbe9ee2291551c5bc03f3cc2e4ab9436ee3"
     size = "20G"
     pkgs = [
         # tools

--- a/vl.c
+++ b/vl.c
@@ -4238,6 +4238,9 @@ int main(int argc, char **argv, char **envp)
     qemu_opts_foreach(qemu_find_opts("mon"),
                       mon_init_func, NULL, &error_fatal);
 
+    /* connect semihosting console input if requested */
+    qemu_semihosting_console_init();
+
     if (foreach_device_config(DEV_SERIAL, serial_parse) < 0)
         exit(1);
     if (foreach_device_config(DEV_PARALLEL, parallel_parse) < 0)