Merge branch 'x86/cpufeature' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into kvm/next

Topic branch for AVX512_4VNNIW and AVX512_4FMAPS support in KVM.

9 files changed, 52 insertions, 95 deletions

diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c
index 4490601a9235..e8a1f699058a 100644
--- a/tools/objtool/builtin-check.c
+++ b/tools/objtool/builtin-check.c
@@ -754,7 +754,7 @@ static struct rela *find_switch_table(struct objtool_file *file,
                 if (insn->type == INSN_JUMP_UNCONDITIONAL &&
                     insn->jump_dest &&
                     (insn->jump_dest->offset <= insn->offset ||
-                     insn->jump_dest->offset >= orig_insn->offset))
+                     insn->jump_dest->offset > orig_insn->offset))
                     break;
 
                 text_rela = find_rela_by_dest_range(insn->sec, insn->offset,
diff --git a/tools/power/cpupower/utils/cpufreq-set.c b/tools/power/cpupower/utils/cpufreq-set.c
index b4bf76971dc9..1eef0aed6423 100644
--- a/tools/power/cpupower/utils/cpufreq-set.c
+++ b/tools/power/cpupower/utils/cpufreq-set.c
@@ -296,7 +296,7 @@ int cmd_freq_set(int argc, char **argv)
                         struct cpufreq_affected_cpus *cpus;
 
                         if (!bitmask_isbitset(cpus_chosen, cpu) ||
-                            cpupower_is_cpu_online(cpu))
+                            cpupower_is_cpu_online(cpu) != 1)
                                 continue;
 
                         cpus = cpufreq_get_related_cpus(cpu);
@@ -316,10 +316,7 @@ int cmd_freq_set(int argc, char **argv)
              cpu <= bitmask_last(cpus_chosen); cpu++) {
 
                 if (!bitmask_isbitset(cpus_chosen, cpu) ||
-                    cpupower_is_cpu_online(cpu))
-                        continue;
-
-                if (cpupower_is_cpu_online(cpu) != 1)
+                    cpupower_is_cpu_online(cpu) != 1)
                         continue;
 
                 printf(_("Setting cpu: %d\n"), cpu);
diff --git a/tools/virtio/ringtest/Makefile b/tools/virtio/ringtest/Makefile
index 877a8a4721b6..c012edbdb13b 100644
--- a/tools/virtio/ringtest/Makefile
+++ b/tools/virtio/ringtest/Makefile
@@ -3,8 +3,8 @@ all:
 all: ring virtio_ring_0_9 virtio_ring_poll virtio_ring_inorder ptr_ring noring
 
 CFLAGS += -Wall
-CFLAGS += -pthread -O2 -ggdb
-LDFLAGS += -pthread -O2 -ggdb
+CFLAGS += -pthread -O2 -ggdb -flto -fwhole-program
+LDFLAGS += -pthread -O2 -ggdb -flto -fwhole-program
 
 main.o: main.c main.h
 ring.o: ring.c main.h
diff --git a/tools/virtio/ringtest/main.c b/tools/virtio/ringtest/main.c
index 147abb452a6c..f31353fac541 100644
--- a/tools/virtio/ringtest/main.c
+++ b/tools/virtio/ringtest/main.c
@@ -96,7 +96,13 @@ void set_affinity(const char *arg)
         assert(!ret);
 }
 
-static void run_guest(void)
+void poll_used(void)
+{
+        while (used_empty())
+                busy_wait();
+}
+
+static void __attribute__((__flatten__)) run_guest(void)
 {
         int completed_before;
         int completed = 0;
@@ -141,7 +147,7 @@ static void run_guest(void)
                 assert(completed <= bufs);
                 assert(started <= bufs);
                 if (do_sleep) {
-                        if (enable_call())
+                        if (used_empty() && enable_call())
                                 wait_for_call();
                 } else {
                         poll_used();
@@ -149,7 +155,13 @@ static void run_guest(void)
         }
 }
 
-static void run_host(void)
+void poll_avail(void)
+{
+        while (avail_empty())
+                busy_wait();
+}
+
+static void __attribute__((__flatten__)) run_host(void)
 {
         int completed_before;
         int completed = 0;
@@ -160,7 +172,7 @@ static void run_host(void)
 
         for (;;) {
                 if (do_sleep) {
-                        if (enable_kick())
+                        if (avail_empty() && enable_kick())
                                 wait_for_kick();
                 } else {
                         poll_avail();
diff --git a/tools/virtio/ringtest/main.h b/tools/virtio/ringtest/main.h
index 16917acb0ade..34e63cc4c572 100644
--- a/tools/virtio/ringtest/main.h
+++ b/tools/virtio/ringtest/main.h
@@ -56,15 +56,15 @@ void alloc_ring(void);
 int add_inbuf(unsigned, void *, void *);
 void *get_buf(unsigned *, void **);
 void disable_call();
+bool used_empty();
 bool enable_call();
 void kick_available();
-void poll_used();
 /* host side */
 void disable_kick();
+bool avail_empty();
 bool enable_kick();
 bool use_buf(unsigned *, void **);
 void call_used();
-void poll_avail();
 
 /* implemented by main */
 extern bool do_sleep;
diff --git a/tools/virtio/ringtest/noring.c b/tools/virtio/ringtest/noring.c
index eda2f4824130..b8d1c1daac7c 100644
--- a/tools/virtio/ringtest/noring.c
+++ b/tools/virtio/ringtest/noring.c
@@ -24,8 +24,9 @@ void *get_buf(unsigned *lenp, void **bufp)
         return "Buffer";
 }
 
-void poll_used(void)
+bool used_empty()
 {
+        return false;
 }
 
 void disable_call()
@@ -54,8 +55,9 @@ bool enable_kick()
         assert(0);
 }
 
-void poll_avail(void)
+bool avail_empty()
 {
+        return false;
 }
 
 bool use_buf(unsigned *lenp, void **bufp)
diff --git a/tools/virtio/ringtest/ptr_ring.c b/tools/virtio/ringtest/ptr_ring.c
index bd2ad1d3b7a9..635b07b4fdd3 100644
--- a/tools/virtio/ringtest/ptr_ring.c
+++ b/tools/virtio/ringtest/ptr_ring.c
@@ -133,18 +133,9 @@ void *get_buf(unsigned *lenp, void **bufp)
         return datap;
 }
 
-void poll_used(void)
+bool used_empty()
 {
-        void *b;
-
-        do {
-                if (tailcnt == headcnt || __ptr_ring_full(&array)) {
-                        b = NULL;
-                        barrier();
-                } else {
-                        b = "Buffer\n";
-                }
-        } while (!b);
+        return (tailcnt == headcnt || __ptr_ring_full(&array));
 }
 
 void disable_call()
@@ -173,14 +164,9 @@ bool enable_kick()
         assert(0);
 }
 
-void poll_avail(void)
+bool avail_empty()
 {
-        void *b;
-
-        do {
-                barrier();
-                b = __ptr_ring_peek(&array);
-        } while (!b);
+        return !__ptr_ring_peek(&array);
 }
 
 bool use_buf(unsigned *lenp, void **bufp)
diff --git a/tools/virtio/ringtest/ring.c b/tools/virtio/ringtest/ring.c
index c25c8d248b6b..747c5dd47be8 100644
--- a/tools/virtio/ringtest/ring.c
+++ b/tools/virtio/ringtest/ring.c
@@ -163,12 +163,11 @@ void *get_buf(unsigned *lenp, void **bufp)
         return datap;
 }
 
-void poll_used(void)
+bool used_empty()
 {
         unsigned head = (ring_size - 1) & guest.last_used_idx;
 
-        while (ring[head].flags & DESC_HW)
-                busy_wait();
+        return (ring[head].flags & DESC_HW);
 }
 
 void disable_call()
@@ -180,13 +179,11 @@ void disable_call()
 
 bool enable_call()
 {
-        unsigned head = (ring_size - 1) & guest.last_used_idx;
-
         event->call_index = guest.last_used_idx;
         /* Flush call index write */
         /* Barrier D (for pairing) */
         smp_mb();
-        return ring[head].flags & DESC_HW;
+        return used_empty();
 }
 
 void kick_available(void)
@@ -213,20 +210,17 @@ void disable_kick()
 
 bool enable_kick()
 {
-        unsigned head = (ring_size - 1) & host.used_idx;
-
         event->kick_index = host.used_idx;
         /* Barrier C (for pairing) */
         smp_mb();
-        return !(ring[head].flags & DESC_HW);
+        return avail_empty();
 }
 
-void poll_avail(void)
+bool avail_empty()
 {
         unsigned head = (ring_size - 1) & host.used_idx;
 
-        while (!(ring[head].flags & DESC_HW))
-                busy_wait();
+        return !(ring[head].flags & DESC_HW);
 }
 
 bool use_buf(unsigned *lenp, void **bufp)
diff --git a/tools/virtio/ringtest/virtio_ring_0_9.c b/tools/virtio/ringtest/virtio_ring_0_9.c
index 761866212aac..bbc3043b2fb1 100644
--- a/tools/virtio/ringtest/virtio_ring_0_9.c
+++ b/tools/virtio/ringtest/virtio_ring_0_9.c
@@ -194,24 +194,16 @@ void *get_buf(unsigned *lenp, void **bufp)
         return datap;
 }
 
-void poll_used(void)
+bool used_empty()
 {
+        unsigned short last_used_idx = guest.last_used_idx;
 #ifdef RING_POLL
-        unsigned head = (ring_size - 1) & guest.last_used_idx;
+        unsigned short head = last_used_idx & (ring_size - 1);
+        unsigned index = ring.used->ring[head].id;
 
-        for (;;) {
-                unsigned index = ring.used->ring[head].id;
-
-                if ((index ^ guest.last_used_idx ^ 0x8000) & ~(ring_size - 1))
-                        busy_wait();
-                else
-                        break;
-        }
+        return (index ^ last_used_idx ^ 0x8000) & ~(ring_size - 1);
 #else
-        unsigned head = guest.last_used_idx;
-
-        while (ring.used->idx == head)
-                busy_wait();
+        return ring.used->idx == last_used_idx;
 #endif
 }
 
@@ -224,22 +216,11 @@ void disable_call()
 
 bool enable_call()
 {
-        unsigned short last_used_idx;
-
-        vring_used_event(&ring) = (last_used_idx = guest.last_used_idx);
+        vring_used_event(&ring) = guest.last_used_idx;
         /* Flush call index write */
         /* Barrier D (for pairing) */
         smp_mb();
-#ifdef RING_POLL
-        {
-                unsigned short head = last_used_idx & (ring_size - 1);
-                unsigned index = ring.used->ring[head].id;
-
-                return (index ^ last_used_idx ^ 0x8000) & ~(ring_size - 1);
-        }
-#else
-        return ring.used->idx == last_used_idx;
-#endif
+        return used_empty();
 }
 
 void kick_available(void)
@@ -266,36 +247,21 @@ void disable_kick()
 
 bool enable_kick()
 {
-        unsigned head = host.used_idx;
-
-        vring_avail_event(&ring) = head;
+        vring_avail_event(&ring) = host.used_idx;
         /* Barrier C (for pairing) */
         smp_mb();
-#ifdef RING_POLL
-        {
-                unsigned index = ring.avail->ring[head & (ring_size - 1)];
-
-                return (index ^ head ^ 0x8000) & ~(ring_size - 1);
-        }
-#else
-        return head == ring.avail->idx;
-#endif
+        return avail_empty();
 }
 
-void poll_avail(void)
+bool avail_empty()
 {
         unsigned head = host.used_idx;
 #ifdef RING_POLL
-        for (;;) {
-                unsigned index = ring.avail->ring[head & (ring_size - 1)];
-                if ((index ^ head ^ 0x8000) & ~(ring_size - 1))
-                        busy_wait();
-                else
-                        break;
-        }
+        unsigned index = ring.avail->ring[head & (ring_size - 1)];
+
+        return ((index ^ head ^ 0x8000) & ~(ring_size - 1));
 #else
-        while (ring.avail->idx == head)
-                busy_wait();
+        return head == ring.avail->idx;
 #endif
 }