Merge remote-tracking branch 'qemu-kvm/uq/master' into staging

# By Jan Kiszka (1) and others
# Via Gleb Natapov
* qemu-kvm/uq/master:
  kvm: Fix uninitialized cpuid_data
  pci-assign: Remove dead code for direct I/O region access from userspace
  KVM: x86: fix typo in KVM_GET_XCRS

Message-id: cover.1385040432.git.gleb@redhat.com
Signed-off-by: Anthony Liguori <aliguori@amazon.com>

2 files changed, 14 insertions, 55 deletions

diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
index aae4309..9686801 100644
--- a/hw/i386/kvm/pci-assign.c
+++ b/hw/i386/kvm/pci-assign.c
@@ -154,55 +154,19 @@ static uint64_t assigned_dev_ioport_rw(AssignedDevRegion *dev_region,
     uint64_t val = 0;
     int fd = dev_region->region->resource_fd;
 
-    if (fd >= 0) {
-        if (data) {
-            DEBUG("pwrite data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
-                  ", addr="TARGET_FMT_plx"\n", *data, size, addr, addr);
-            if (pwrite(fd, data, size, addr) != size) {
-                error_report("%s - pwrite failed %s",
-                             __func__, strerror(errno));
-            }
-        } else {
-            if (pread(fd, &val, size, addr) != size) {
-                error_report("%s - pread failed %s",
-                             __func__, strerror(errno));
-                val = (1UL << (size * 8)) - 1;
-            }
-            DEBUG("pread val=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
-                  ", addr=" TARGET_FMT_plx "\n", val, size, addr, addr);
+    if (data) {
+        DEBUG("pwrite data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
+              ", addr="TARGET_FMT_plx"\n", *data, size, addr, addr);
+        if (pwrite(fd, data, size, addr) != size) {
+            error_report("%s - pwrite failed %s", __func__, strerror(errno));
         }
     } else {
-        uint32_t port = addr + dev_region->u.r_baseport;
-
-        if (data) {
-            DEBUG("out data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
-                  ", host=%x\n", *data, size, addr, port);
-            switch (size) {
-            case 1:
-                outb(*data, port);
-                break;
-            case 2:
-                outw(*data, port);
-                break;
-            case 4:
-                outl(*data, port);
-                break;
-            }
-        } else {
-            switch (size) {
-            case 1:
-                val = inb(port);
-                break;
-            case 2:
-                val = inw(port);
-                break;
-            case 4:
-                val = inl(port);
-                break;
-            }
-            DEBUG("in data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
-                  ", host=%x\n", val, size, addr, port);
+        if (pread(fd, &val, size, addr) != size) {
+            error_report("%s - pread failed %s", __func__, strerror(errno));
+            val = (1UL << (size * 8)) - 1;
         }
+        DEBUG("pread val=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
+              ", addr=" TARGET_FMT_plx "\n", val, size, addr, addr);
     }
     return val;
 }
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 749aa09..1188482 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -456,11 +456,12 @@ int kvm_arch_init_vcpu(CPUState *cs)
     uint32_t signature[3];
     int r;
 
+    memset(&cpuid_data, 0, sizeof(cpuid_data));
+
     cpuid_i = 0;
 
     /* Paravirtualization CPUIDs */
     c = &cpuid_data.entries[cpuid_i++];
-    memset(c, 0, sizeof(*c));
     c->function = KVM_CPUID_SIGNATURE;
     if (!hyperv_enabled(cpu)) {
         memcpy(signature, "KVMKVMKVM\0\0\0", 12);
@@ -474,7 +475,6 @@ int kvm_arch_init_vcpu(CPUState *cs)
     c->edx = signature[2];
 
     c = &cpuid_data.entries[cpuid_i++];
-    memset(c, 0, sizeof(*c));
     c->function = KVM_CPUID_FEATURES;
     c->eax = env->features[FEAT_KVM];
 
@@ -483,13 +483,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
         c->eax = signature[0];
 
         c = &cpuid_data.entries[cpuid_i++];
-        memset(c, 0, sizeof(*c));
         c->function = HYPERV_CPUID_VERSION;
         c->eax = 0x00001bbc;
         c->ebx = 0x00060001;
 
         c = &cpuid_data.entries[cpuid_i++];
-        memset(c, 0, sizeof(*c));
         c->function = HYPERV_CPUID_FEATURES;
         if (cpu->hyperv_relaxed_timing) {
             c->eax |= HV_X64_MSR_HYPERCALL_AVAILABLE;
@@ -500,7 +498,6 @@ int kvm_arch_init_vcpu(CPUState *cs)
         }
 
         c = &cpuid_data.entries[cpuid_i++];
-        memset(c, 0, sizeof(*c));
         c->function = HYPERV_CPUID_ENLIGHTMENT_INFO;
         if (cpu->hyperv_relaxed_timing) {
             c->eax |= HV_X64_RELAXED_TIMING_RECOMMENDED;
@@ -511,13 +508,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
         c->ebx = cpu->hyperv_spinlock_attempts;
 
         c = &cpuid_data.entries[cpuid_i++];
-        memset(c, 0, sizeof(*c));
         c->function = HYPERV_CPUID_IMPLEMENT_LIMITS;
         c->eax = 0x40;
         c->ebx = 0x40;
 
         c = &cpuid_data.entries[cpuid_i++];
-        memset(c, 0, sizeof(*c));
         c->function = KVM_CPUID_SIGNATURE_NEXT;
         memcpy(signature, "KVMKVMKVM\0\0\0", 12);
         c->eax = 0;
@@ -1314,8 +1309,8 @@ static int kvm_get_xcrs(X86CPU *cpu)
 
     for (i = 0; i < xcrs.nr_xcrs; i++) {
         /* Only support xcr0 now */
-        if (xcrs.xcrs[0].xcr == 0) {
-            env->xcr0 = xcrs.xcrs[0].value;
+        if (xcrs.xcrs[i].xcr == 0) {
+            env->xcr0 = xcrs.xcrs[i].value;
             break;
         }
     }