* various small fixes and cleanups

* fixes for the ucode revision patch from the previous pull request
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* various small fixes and cleanups
* fixes for the ucode revision patch from the previous pull request

# gpg: Signature made Wed 12 Feb 2020 15:30:24 GMT
# gpg:                using RSA key BFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream:
  target/i386: enable monitor and ucode revision with -cpu max
  target/i386: check for availability of MSR_IA32_UCODE_REV as an emulated MSR
  target/i386: fix TCG UCODE_REV access
  build: move TARGET_GPROF to config-host.mak
  exec: do not define use_icount for user-mode emulation
  minikconf: accept alnum identifiers
  Remove support for CLOCK_MONOTONIC not being defined
  seqlock: fix seqlock_write_unlock_impl function
  vl: Don't mismatch g_strsplit()/g_free()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

bsd-user/syscall.c

@@ -330,7 +330,7 @@ abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
 
     switch(num) {
     case TARGET_FREEBSD_NR_exit:
-#ifdef TARGET_GPROF
+#ifdef CONFIG_GPROF
         _mcleanup();
 #endif
         gdb_exit(cpu_env, arg1);
@@ -432,7 +432,7 @@ abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
 
     switch(num) {
     case TARGET_NETBSD_NR_exit:
-#ifdef TARGET_GPROF
+#ifdef CONFIG_GPROF
         _mcleanup();
 #endif
         gdb_exit(cpu_env, arg1);
@@ -511,7 +511,7 @@ abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
 
     switch(num) {
     case TARGET_OPENBSD_NR_exit:
-#ifdef TARGET_GPROF
+#ifdef CONFIG_GPROF
         _mcleanup();
 #endif
         gdb_exit(cpu_env, arg1);

configure

@@ -6771,6 +6771,9 @@ fi
 if test "$l2tpv3" = "yes" ; then
   echo "CONFIG_L2TPV3=y" >> $config_host_mak
 fi
+if test "$gprof" = "yes" ; then
+  echo "CONFIG_GPROF=y" >> $config_host_mak
+fi
 if test "$cap_ng" = "yes" ; then
   echo "CONFIG_LIBCAP_NG=y" >> $config_host_mak
 fi
@@ -7951,7 +7954,6 @@ alpha)
 esac
 
 if test "$gprof" = "yes" ; then
-  echo "TARGET_GPROF=y" >> $config_target_mak
   if test "$target_linux_user" = "yes" ; then
     cflags="-p $cflags"
     ldflags="-p $ldflags"

exec.c

@@ -98,15 +98,15 @@ CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus);
 /* current CPU in the current thread. It is only valid inside
    cpu_exec() */
 __thread CPUState *current_cpu;
-/* 0 = Do not count executed instructions.
-   1 = Precise instruction counting.
-   2 = Adaptive rate instruction counting.  */
-int use_icount;
 
 uintptr_t qemu_host_page_size;
 intptr_t qemu_host_page_mask;
 
 #if !defined(CONFIG_USER_ONLY)
+/* 0 = Do not count executed instructions.
+   1 = Precise instruction counting.
+   2 = Adaptive rate instruction counting.  */
+int use_icount;
 
 typedef struct PhysPageEntry PhysPageEntry;
 

include/qemu/seqlock.h

@@ -55,11 +55,11 @@ static inline void seqlock_write_lock_impl(QemuSeqLock *sl, QemuLockable *lock)
 #define seqlock_write_lock(sl, lock) \
     seqlock_write_lock_impl(sl, QEMU_MAKE_LOCKABLE(lock))
 
-/* Lock out other writers and update the count.  */
+/* Update the count and release the lock.  */
 static inline void seqlock_write_unlock_impl(QemuSeqLock *sl, QemuLockable *lock)
 {
+    seqlock_write_end(sl);
     qemu_lockable_unlock(lock);
-    seqlock_write_begin(sl);
 }
 #define seqlock_write_unlock(sl, lock) \
     seqlock_write_unlock_impl(sl, QEMU_MAKE_LOCKABLE(lock))

include/qemu/timer.h

@@ -838,14 +838,11 @@ extern int use_rt_clock;
 
 static inline int64_t get_clock(void)
 {
-#ifdef CLOCK_MONOTONIC
     if (use_rt_clock) {
         struct timespec ts;
         clock_gettime(CLOCK_MONOTONIC, &ts);
         return ts.tv_sec * 1000000000LL + ts.tv_nsec;
-    } else
+    } else {
-#endif
-    {
         /* XXX: using gettimeofday leads to problems if the date
            changes, so it should be avoided. */
         return get_clock_realtime();

linux-user/exit.c

@@ -18,7 +18,7 @@
  */
 #include "qemu/osdep.h"
 #include "qemu.h"
-#ifdef TARGET_GPROF
+#ifdef CONFIG_GPROF
 #include <sys/gmon.h>
 #endif
 
@@ -28,7 +28,7 @@ extern void __gcov_dump(void);
 
 void preexit_cleanup(CPUArchState *env, int code)
 {
-#ifdef TARGET_GPROF
+#ifdef CONFIG_GPROF
         _mcleanup();
 #endif
 #ifdef CONFIG_GCOV

linux-user/signal.c

@@ -509,7 +509,7 @@ void signal_init(void)
     act.sa_flags = SA_SIGINFO;
     act.sa_sigaction = host_signal_handler;
     for(i = 1; i <= TARGET_NSIG; i++) {
-#ifdef TARGET_GPROF
+#ifdef CONFIG_GPROF
         if (i == SIGPROF) {
             continue;
         }

scripts/minikconf.py

@@ -645,7 +645,7 @@ class KconfigParser:
             self.cursor = self.src.find('\n', self.cursor)
             self.val = self.src[start:self.cursor]
             return TOK_SOURCE
-        elif self.tok.isalpha():
+        elif self.tok.isalnum():
             # identifier
             while self.src[self.cursor].isalnum() or self.src[self.cursor] == '_':
                 self.cursor += 1

target/i386/cpu.c

@@ -6414,7 +6414,9 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
             error_setg(&local_err, "CPU model '%s' requires KVM", name);
             goto out;
         }
+    }
 
+    if (cpu->max_features && accel_uses_host_cpuid()) {
         if (enable_cpu_pm) {
             host_cpuid(5, 0, &cpu->mwait.eax, &cpu->mwait.ebx,
                        &cpu->mwait.ecx, &cpu->mwait.edx);

target/i386/kvm.c

@@ -105,6 +105,7 @@ static bool has_msr_smi_count;
 static bool has_msr_arch_capabs;
 static bool has_msr_core_capabs;
 static bool has_msr_vmx_vmfunc;
+static bool has_msr_ucode_rev;
 
 static uint32_t has_architectural_pmu_version;
 static uint32_t num_architectural_pmu_gp_counters;
@@ -2056,6 +2057,9 @@ static int kvm_get_supported_msrs(KVMState *s)
             case MSR_IA32_VMX_VMFUNC:
                 has_msr_vmx_vmfunc = true;
                 break;
+            case MSR_IA32_UCODE_REV:
+                has_msr_ucode_rev = true;
+                break;
             }
         }
     }
@@ -2696,8 +2700,7 @@ static void kvm_init_msrs(X86CPU *cpu)
                           env->features[FEAT_CORE_CAPABILITY]);
     }
 
-    if (kvm_arch_get_supported_msr_feature(kvm_state,
+    if (has_msr_ucode_rev) {
-                                           MSR_IA32_UCODE_REV)) {
         kvm_msr_entry_add(cpu, MSR_IA32_UCODE_REV, cpu->ucode_rev);
     }
 

target/i386/misc_helper.c

@@ -229,7 +229,6 @@ void helper_rdmsr(CPUX86State *env)
 #else
 void helper_wrmsr(CPUX86State *env)
 {
-    X86CPU *x86_cpu = env_archcpu(env);
     uint64_t val;
 
     cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 1, GETPC());
@@ -372,9 +371,6 @@ void helper_wrmsr(CPUX86State *env)
         env->msr_bndcfgs = val;
         cpu_sync_bndcs_hflags(env);
         break;
-     case MSR_IA32_UCODE_REV:
-        val = x86_cpu->ucode_rev;
-        break;
     default:
         if ((uint32_t)env->regs[R_ECX] >= MSR_MC0_CTL
             && (uint32_t)env->regs[R_ECX] < MSR_MC0_CTL +
@@ -393,6 +389,7 @@ void helper_wrmsr(CPUX86State *env)
 
 void helper_rdmsr(CPUX86State *env)
 {
+    X86CPU *x86_cpu = env_archcpu(env);
     uint64_t val;
 
     cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 0, GETPC());
@@ -526,6 +523,9 @@ void helper_rdmsr(CPUX86State *env)
     case MSR_IA32_BNDCFGS:
         val = env->msr_bndcfgs;
         break;
+     case MSR_IA32_UCODE_REV:
+        val = x86_cpu->ucode_rev;
+        break;
     default:
         if ((uint32_t)env->regs[R_ECX] >= MSR_MC0_CTL
             && (uint32_t)env->regs[R_ECX] < MSR_MC0_CTL +

tests/check-block.sh

@@ -16,7 +16,7 @@ if [ "$#" -ne 0 ]; then
     format_list="$@"
 fi
 
-if grep -q "TARGET_GPROF=y" *-softmmu/config-target.mak 2>/dev/null ; then
+if grep -q "CONFIG_GPROF=y" config-host.mak 2>/dev/null ; then
     echo "GPROF is enabled ==> Not running the qemu-iotests."
     exit 0
 fi

util/qemu-timer-common.c

@@ -49,14 +49,11 @@ int use_rt_clock;
 
 static void __attribute__((constructor)) init_get_clock(void)
 {
+    struct timespec ts;
+
     use_rt_clock = 0;
-#ifdef CLOCK_MONOTONIC
+    if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) {
-    {
+        use_rt_clock = 1;
-        struct timespec ts;
-        if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) {
-            use_rt_clock = 1;
-        }
     }
-#endif
 }
 #endif

vl.c

@@ -3510,7 +3510,7 @@ int main(int argc, char **argv, char **envp)
                             gchar **optname = g_strsplit(typename,
                                                          ACCEL_CLASS_SUFFIX, 0);
                             printf("%s\n", optname[0]);
-                            g_free(optname);
+                            g_strfreev(optname);
                         }
                         g_free(typename);
                     }