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-rw-r--r--hw/arm/smmuv3.c6
-rw-r--r--hw/arm/virt.c7
-rw-r--r--hw/core/machine.c5
-rw-r--r--hw/i386/pc.c3
-rw-r--r--hw/i386/pc_piix.c14
-rw-r--r--hw/i386/pc_q35.c13
-rw-r--r--hw/pci-host/gpex.c56
-rw-r--r--hw/ppc/spapr.c15
-rw-r--r--hw/s390x/s390-virtio-ccw.c14
9 files changed, 122 insertions, 11 deletions
diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 8705612535..228dc54b0b 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -259,8 +259,9 @@ static void smmuv3_init_regs(SMMUv3State *s)
     s->idr[3] = FIELD_DP32(s->idr[3], IDR3, RIL, 1);
     s->idr[3] = FIELD_DP32(s->idr[3], IDR3, HAD, 1);
 
-   /* 4K and 64K granule support */
+    /* 4K, 16K and 64K granule support */
     s->idr[5] = FIELD_DP32(s->idr[5], IDR5, GRAN4K, 1);
+    s->idr[5] = FIELD_DP32(s->idr[5], IDR5, GRAN16K, 1);
     s->idr[5] = FIELD_DP32(s->idr[5], IDR5, GRAN64K, 1);
     s->idr[5] = FIELD_DP32(s->idr[5], IDR5, OAS, SMMU_IDR5_OAS); /* 44 bits */
 
@@ -503,7 +504,8 @@ static int decode_cd(SMMUTransCfg *cfg, CD *cd, SMMUEventInfo *event)
 
         tg = CD_TG(cd, i);
         tt->granule_sz = tg2granule(tg, i);
-        if ((tt->granule_sz != 12 && tt->granule_sz != 16) || CD_ENDI(cd)) {
+        if ((tt->granule_sz != 12 && tt->granule_sz != 14 &&
+             tt->granule_sz != 16) || CD_ENDI(cd)) {
             goto bad_cd;
         }
 
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 9f01d9041b..fee696fb0e 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -2757,10 +2757,15 @@ static void machvirt_machine_init(void)
 }
 type_init(machvirt_machine_init);
 
+static void virt_machine_6_1_options(MachineClass *mc)
+{
+}
+DEFINE_VIRT_MACHINE_AS_LATEST(6, 1)
+
 static void virt_machine_6_0_options(MachineClass *mc)
 {
 }
-DEFINE_VIRT_MACHINE_AS_LATEST(6, 0)
+DEFINE_VIRT_MACHINE(6, 0)
 
 static void virt_machine_5_2_options(MachineClass *mc)
 {
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 40def78183..0f5ce43d0c 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -36,6 +36,11 @@
 #include "hw/virtio/virtio.h"
 #include "hw/virtio/virtio-pci.h"
 
+GlobalProperty hw_compat_6_0[] = {
+    { "gpex-pcihost", "allow-unmapped-accesses", "false" },
+};
+const size_t hw_compat_6_0_len = G_N_ELEMENTS(hw_compat_6_0);
+
 GlobalProperty hw_compat_5_2[] = {
     { "ICH9-LPC", "smm-compat", "on"},
     { "PIIX4_PM", "smm-compat", "on"},
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 8a84b25a03..364816efc9 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -96,6 +96,9 @@
 #include "trace.h"
 #include CONFIG_DEVICES
 
+GlobalProperty pc_compat_6_0[] = {};
+const size_t pc_compat_6_0_len = G_N_ELEMENTS(pc_compat_6_0);
+
 GlobalProperty pc_compat_5_2[] = {
     { "ICH9-LPC", "x-smi-cpu-hotunplug", "off" },
 };
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 46cc951073..4e8edffeaf 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -415,7 +415,7 @@ static void pc_i440fx_machine_options(MachineClass *m)
     machine_class_allow_dynamic_sysbus_dev(m, TYPE_VMBUS_BRIDGE);
 }
 
-static void pc_i440fx_6_0_machine_options(MachineClass *m)
+static void pc_i440fx_6_1_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_i440fx_machine_options(m);
@@ -424,6 +424,18 @@ static void pc_i440fx_6_0_machine_options(MachineClass *m)
     pcmc->default_cpu_version = 1;
 }
 
+DEFINE_I440FX_MACHINE(v6_1, "pc-i440fx-6.1", NULL,
+                      pc_i440fx_6_1_machine_options);
+
+static void pc_i440fx_6_0_machine_options(MachineClass *m)
+{
+    pc_i440fx_6_1_machine_options(m);
+    m->alias = NULL;
+    m->is_default = false;
+    compat_props_add(m->compat_props, hw_compat_6_0, hw_compat_6_0_len);
+    compat_props_add(m->compat_props, pc_compat_6_0, pc_compat_6_0_len);
+}
+
 DEFINE_I440FX_MACHINE(v6_0, "pc-i440fx-6.0", NULL,
                       pc_i440fx_6_0_machine_options);
 
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 53450190f5..458ed41c65 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -345,7 +345,7 @@ static void pc_q35_machine_options(MachineClass *m)
     m->max_cpus = 288;
 }
 
-static void pc_q35_6_0_machine_options(MachineClass *m)
+static void pc_q35_6_1_machine_options(MachineClass *m)
 {
     PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
     pc_q35_machine_options(m);
@@ -353,6 +353,17 @@ static void pc_q35_6_0_machine_options(MachineClass *m)
     pcmc->default_cpu_version = 1;
 }
 
+DEFINE_Q35_MACHINE(v6_1, "pc-q35-6.1", NULL,
+                   pc_q35_6_1_machine_options);
+
+static void pc_q35_6_0_machine_options(MachineClass *m)
+{
+    pc_q35_6_1_machine_options(m);
+    m->alias = NULL;
+    compat_props_add(m->compat_props, hw_compat_6_0, hw_compat_6_0_len);
+    compat_props_add(m->compat_props, pc_compat_6_0, pc_compat_6_0_len);
+}
+
 DEFINE_Q35_MACHINE(v6_0, "pc-q35-6.0", NULL,
                    pc_q35_6_0_machine_options);
 
diff --git a/hw/pci-host/gpex.c b/hw/pci-host/gpex.c
index 2bdbe7b456..a6752fac5e 100644
--- a/hw/pci-host/gpex.c
+++ b/hw/pci-host/gpex.c
@@ -83,12 +83,51 @@ static void gpex_host_realize(DeviceState *dev, Error **errp)
     int i;
 
     pcie_host_mmcfg_init(pex, PCIE_MMCFG_SIZE_MAX);
+    sysbus_init_mmio(sbd, &pex->mmio);
+
+    /*
+     * Note that the MemoryRegions io_mmio and io_ioport that we pass
+     * to pci_register_root_bus() are not the same as the
+     * MemoryRegions io_mmio_window and io_ioport_window that we
+     * expose as SysBus MRs. The difference is in the behaviour of
+     * accesses to addresses where no PCI device has been mapped.
+     *
+     * io_mmio and io_ioport are the underlying PCI view of the PCI
+     * address space, and when a PCI device does a bus master access
+     * to a bad address this is reported back to it as a transaction
+     * failure.
+     *
+     * io_mmio_window and io_ioport_window implement "unmapped
+     * addresses read as -1 and ignore writes"; this is traditional
+     * x86 PC behaviour, which is not mandated by the PCI spec proper
+     * but expected by much PCI-using guest software, including Linux.
+     *
+     * In the interests of not being unnecessarily surprising, we
+     * implement it in the gpex PCI host controller, by providing the
+     * _window MRs, which are containers with io ops that implement
+     * the 'background' behaviour and which hold the real PCI MRs as
+     * subregions.
+     */
     memory_region_init(&s->io_mmio, OBJECT(s), "gpex_mmio", UINT64_MAX);
     memory_region_init(&s->io_ioport, OBJECT(s), "gpex_ioport", 64 * 1024);
 
-    sysbus_init_mmio(sbd, &pex->mmio);
-    sysbus_init_mmio(sbd, &s->io_mmio);
-    sysbus_init_mmio(sbd, &s->io_ioport);
+    if (s->allow_unmapped_accesses) {
+        memory_region_init_io(&s->io_mmio_window, OBJECT(s),
+                              &unassigned_io_ops, OBJECT(s),
+                              "gpex_mmio_window", UINT64_MAX);
+        memory_region_init_io(&s->io_ioport_window, OBJECT(s),
+                              &unassigned_io_ops, OBJECT(s),
+                              "gpex_ioport_window", 64 * 1024);
+
+        memory_region_add_subregion(&s->io_mmio_window, 0, &s->io_mmio);
+        memory_region_add_subregion(&s->io_ioport_window, 0, &s->io_ioport);
+        sysbus_init_mmio(sbd, &s->io_mmio_window);
+        sysbus_init_mmio(sbd, &s->io_ioport_window);
+    } else {
+        sysbus_init_mmio(sbd, &s->io_mmio);
+        sysbus_init_mmio(sbd, &s->io_ioport);
+    }
+
     for (i = 0; i < GPEX_NUM_IRQS; i++) {
         sysbus_init_irq(sbd, &s->irq[i]);
         s->irq_num[i] = -1;
@@ -108,6 +147,16 @@ static const char *gpex_host_root_bus_path(PCIHostState *host_bridge,
     return "0000:00";
 }
 
+static Property gpex_host_properties[] = {
+    /*
+     * Permit CPU accesses to unmapped areas of the PIO and MMIO windows
+     * (discarding writes and returning -1 for reads) rather than aborting.
+     */
+    DEFINE_PROP_BOOL("allow-unmapped-accesses", GPEXHost,
+                     allow_unmapped_accesses, true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void gpex_host_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -117,6 +166,7 @@ static void gpex_host_class_init(ObjectClass *klass, void *data)
     dc->realize = gpex_host_realize;
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
     dc->fw_name = "pci";
+    device_class_set_props(dc, gpex_host_properties);
 }
 
 static void gpex_host_initfn(Object *obj)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index e4be00b732..529ff056dd 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4605,14 +4605,25 @@ static void spapr_machine_latest_class_options(MachineClass *mc)
     type_init(spapr_machine_register_##suffix)
 
 /*
+ * pseries-6.1
+ */
+static void spapr_machine_6_1_class_options(MachineClass *mc)
+{
+    /* Defaults for the latest behaviour inherited from the base class */
+}
+
+DEFINE_SPAPR_MACHINE(6_1, "6.1", true);
+
+/*
  * pseries-6.0
  */
 static void spapr_machine_6_0_class_options(MachineClass *mc)
 {
-    /* Defaults for the latest behaviour inherited from the base class */
+    spapr_machine_6_1_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_6_0, hw_compat_6_0_len);
 }
 
-DEFINE_SPAPR_MACHINE(6_0, "6.0", true);
+DEFINE_SPAPR_MACHINE(6_0, "6.0", false);
 
 /*
  * pseries-5.2
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 2972b607f3..56b52d2d30 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -795,14 +795,26 @@ bool css_migration_enabled(void)
     }                                                                         \
     type_init(ccw_machine_register_##suffix)
 
+static void ccw_machine_6_1_instance_options(MachineState *machine)
+{
+}
+
+static void ccw_machine_6_1_class_options(MachineClass *mc)
+{
+}
+DEFINE_CCW_MACHINE(6_1, "6.1", true);
+
 static void ccw_machine_6_0_instance_options(MachineState *machine)
 {
+    ccw_machine_6_1_instance_options(machine);
 }
 
 static void ccw_machine_6_0_class_options(MachineClass *mc)
 {
+    ccw_machine_6_1_class_options(mc);
+    compat_props_add(mc->compat_props, hw_compat_6_0, hw_compat_6_0_len);
 }
-DEFINE_CCW_MACHINE(6_0, "6.0", true);
+DEFINE_CCW_MACHINE(6_0, "6.0", false);
 
 static void ccw_machine_5_2_instance_options(MachineState *machine)
 {