qemu-kvm/0006-Machine-type-related-general-changes.patch

From 802da738d5231ef56d25f4ffcfa6e7d97698ee72 Mon Sep 17 00:00:00 2001
From: Miroslav Rezanina <mrezanin@redhat.com>
Date: Fri, 11 Jan 2019 09:54:45 +0100
Subject: Machine type related general changes

This patch is first part of original "Add RHEL machine types" patch we
split to allow easier review. It contains changes not related to any
architecture.

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 hw/acpi/piix4.c              |   2 +-
 hw/arm/virt.c                |   2 +-
 hw/core/machine.c            | 269 +++++++++++++++++++++++++++++++++++
 hw/i386/fw_cfg.c             |   3 +-
 hw/net/rtl8139.c             |   4 +-
 hw/smbios/smbios.c           |  46 +++++-
 hw/timer/i8254_common.c      |   2 +-
 hw/usb/hcd-xhci-pci.c        |  59 ++++++--
 hw/usb/hcd-xhci-pci.h        |   1 +
 hw/virtio/virtio-mem.c       |   3 +-
 include/hw/boards.h          |  40 ++++++
 include/hw/firmware/smbios.h |   4 +-
 include/hw/i386/pc.h         |   3 +
 13 files changed, 414 insertions(+), 24 deletions(-)

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index debe1adb84..e8ddcd716e 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -245,7 +245,7 @@ static bool vmstate_test_migrate_acpi_index(void *opaque, int version_id)
 static const VMStateDescription vmstate_acpi = {
     .name = "piix4_pm",
     .version_id = 3,
-    .minimum_version_id = 3,
+    .minimum_version_id = 2,
     .post_load = vmstate_acpi_post_load,
     .fields = (const VMStateField[]) {
         VMSTATE_PCI_DEVICE(parent_obj, PIIX4PMState),
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 6c6d155002..36e9b4b4e9 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1651,7 +1651,7 @@ static void virt_build_smbios(VirtMachineState *vms)
 
     smbios_set_defaults("QEMU", product,
                         vmc->smbios_old_sys_ver ? "1.0" : mc->name,
-                        true);
+                        true, NULL, NULL);
 
     /* build the array of physical mem area from base_memmap */
     mem_array.address = vms->memmap[VIRT_MEM].base;
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 37ede0e7d4..695cb89a46 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -296,6 +296,275 @@ GlobalProperty hw_compat_2_1[] = {
 };
 const size_t hw_compat_2_1_len = G_N_ELEMENTS(hw_compat_2_1);
 
+/*
+ * RHEL only: machine types for previous major releases are deprecated
+ */
+const char *rhel_old_machine_deprecation =
+    "machine types for previous major releases are deprecated";
+
+GlobalProperty hw_compat_rhel_9_4[] = {
+  /* hw_compat_rhel_9_4 from hw_compat_8_0 */
+    { TYPE_VIRTIO_NET, "host_uso", "off"},
+  /* hw_compat_rhel_9_4 from hw_compat_8_0 */
+    { TYPE_VIRTIO_NET, "guest_uso4", "off"},
+  /* hw_compat_rhel_9_4 from hw_compat_8_0 */
+    { TYPE_VIRTIO_NET, "guest_uso6", "off"},
+  /* hw_compat_rhel_9_4 from hw_compat_8_1 */
+     { TYPE_PCI_BRIDGE, "x-pci-express-writeable-slt-bug", "true" },
+  /* hw_compat_rhel_9_4 from hw_compat_8_1 */
+     { "ramfb", "x-migrate", "off" },
+  /* hw_compat_rhel_9_4 from hw_compat_8_1 */
+     { "vfio-pci-nohotplug", "x-ramfb-migrate", "off" },
+  /* hw_compat_rhel_9_4 from hw_compat_8_1 */
+     { "igb", "x-pcie-flr-init", "off" },
+  /* hw_compat_rhel_9_4 jira RHEL-24045 */
+     { "virtio-mem", "dynamic-memslots", "off" },
+};
+const size_t hw_compat_rhel_9_4_len = G_N_ELEMENTS(hw_compat_rhel_9_4);
+
+GlobalProperty hw_compat_rhel_9_3[] = {
+  /* hw_compat_rhel_9_3 from hw_compat_8_0 */
+  { "migration", "multifd-flush-after-each-section", "on"},
+  /* hw_compat_rhel_9_3 from hw_compat_8_0 */
+  { TYPE_PCI_DEVICE, "x-pcie-ari-nextfn-1", "on" },
+};
+const size_t hw_compat_rhel_9_3_len = G_N_ELEMENTS(hw_compat_rhel_9_3);
+
+GlobalProperty hw_compat_rhel_9_2[] = {
+  /* hw_compat_rhel_9_2 from hw_compat_7_2 */
+  { "e1000e", "migrate-timadj", "off" },
+  /* hw_compat_rhel_9_2 from hw_compat_7_2 */
+  { "virtio-mem", "x-early-migration", "false" },
+  /* hw_compat_rhel_9_2 from hw_compat_7_2 */
+  { "migration", "x-preempt-pre-7-2", "true" },
+  /* hw_compat_rhel_9_2 from hw_compat_7_2 */
+  { TYPE_PCI_DEVICE, "x-pcie-err-unc-mask", "off" },
+};
+const size_t hw_compat_rhel_9_2_len = G_N_ELEMENTS(hw_compat_rhel_9_2);
+
+/*
+ * Mostly the same as hw_compat_7_0
+ */
+GlobalProperty hw_compat_rhel_9_1[] = {
+  /* hw_compat_rhel_9_1 from hw_compat_7_0 */
+  { "arm-gicv3-common", "force-8-bit-prio", "on" },
+  /* hw_compat_rhel_9_1 from hw_compat_7_0 */
+  { "nvme-ns", "eui64-default", "on"},
+  /* hw_compat_rhel_9_1 from hw_compat_7_1 */
+  { "virtio-device", "queue_reset", "false" },
+  /* hw_compat_rhel_9_1 bz 2155749 */
+  { "virtio-rng-pci", "vectors", "0" },
+  /* hw_compat_rhel_9_1 bz 2162569 */
+  { "virtio-rng-pci-transitional", "vectors", "0" },
+  { "virtio-rng-pci-non-transitional", "vectors", "0" },
+};
+const size_t hw_compat_rhel_9_1_len = G_N_ELEMENTS(hw_compat_rhel_9_1);
+
+/*
+ * Mostly the same as hw_compat_6_2
+ */
+GlobalProperty hw_compat_rhel_9_0[] = {
+    /* hw_compat_rhel_9_0 from hw_compat_6_2 */
+    { "PIIX4_PM", "x-not-migrate-acpi-index", "on"},
+};
+const size_t hw_compat_rhel_9_0_len = G_N_ELEMENTS(hw_compat_rhel_9_0);
+
+GlobalProperty hw_compat_rhel_8_6[] = {
+    /* hw_compat_rhel_8_6 bz 2065589 */
+    /*
+     * vhost-vsock device in RHEL 8 kernels doesn't support seqpacket, so
+     * we need do disable it downstream on the latest hw_compat_rhel_8.
+     */
+    { "vhost-vsock-device", "seqpacket", "off" },
+};
+const size_t hw_compat_rhel_8_6_len = G_N_ELEMENTS(hw_compat_rhel_8_6);
+
+/*
+ * Mostly the same as hw_compat_6_0 and hw_compat_6_1
+ */
+GlobalProperty hw_compat_rhel_8_5[] = {
+    /* hw_compat_rhel_8_5 from hw_compat_6_0 */
+    { "gpex-pcihost", "allow-unmapped-accesses", "false" },
+    /* hw_compat_rhel_8_5 from hw_compat_6_0 */
+    { "i8042", "extended-state", "false"},
+    /* hw_compat_rhel_8_5 from hw_compat_6_0 */
+    { "nvme-ns", "eui64-default", "off"},
+    /* hw_compat_rhel_8_5 from hw_compat_6_0 */
+    { "e1000", "init-vet", "off" },
+    /* hw_compat_rhel_8_5 from hw_compat_6_0 */
+    { "e1000e", "init-vet", "off" },
+    /* hw_compat_rhel_8_5 from hw_compat_6_0 */
+    { "vhost-vsock-device", "seqpacket", "off" },
+    /* hw_compat_rhel_8_5 from hw_compat_6_1 */
+    { "vhost-user-vsock-device", "seqpacket", "off" },
+    /* hw_compat_rhel_8_5 from hw_compat_6_1 */
+    { "nvme-ns", "shared", "off" },
+};
+const size_t hw_compat_rhel_8_5_len = G_N_ELEMENTS(hw_compat_rhel_8_5);
+
+/*
+ * Mostly the same as hw_compat_5_2
+ */
+GlobalProperty hw_compat_rhel_8_4[] = {
+    /* hw_compat_rhel_8_4 from hw_compat_5_2 */
+    { "ICH9-LPC", "smm-compat", "on"},
+    /* hw_compat_rhel_8_4 from hw_compat_5_2 */
+    { "PIIX4_PM", "smm-compat", "on"},
+    /* hw_compat_rhel_8_4 from hw_compat_5_2 */
+    { "virtio-blk-device", "report-discard-granularity", "off" },
+    /* hw_compat_rhel_8_4 from hw_compat_5_2 */
+    /*
+     * Upstream incorrectly had "virtio-net-pci" instead of "virtio-net-pci-base",
+     * (https://bugzilla.redhat.com/show_bug.cgi?id=1999141)
+     */
+    { "virtio-net-pci-base", "vectors", "3"},
+};
+const size_t hw_compat_rhel_8_4_len = G_N_ELEMENTS(hw_compat_rhel_8_4);
+
+/*
+ * Mostly the same as hw_compat_5_1
+ */
+GlobalProperty hw_compat_rhel_8_3[] = {
+    /* hw_compat_rhel_8_3 from hw_compat_5_1 */
+    { "vhost-scsi", "num_queues", "1"},
+    /* hw_compat_rhel_8_3 from hw_compat_5_1 */
+    { "vhost-user-blk", "num-queues", "1"},
+    /* hw_compat_rhel_8_3 from hw_compat_5_1 */
+    { "vhost-user-scsi", "num_queues", "1"},
+    /* hw_compat_rhel_8_3 from hw_compat_5_1 */
+    { "virtio-blk-device", "num-queues", "1"},
+    /* hw_compat_rhel_8_3 from hw_compat_5_1 */
+    { "virtio-scsi-device", "num_queues", "1"},
+    /* hw_compat_rhel_8_3 from hw_compat_5_1 */
+    { "nvme", "use-intel-id", "on"},
+    /* hw_compat_rhel_8_3 from hw_compat_5_1 */
+    { "pvpanic", "events", "1"}, /* PVPANIC_PANICKED */
+    /* hw_compat_rhel_8_3 from hw_compat_5_1 */
+    { "pl011", "migrate-clk", "off" },
+    /* hw_compat_rhel_8_3 bz 1912846 */
+    { "pci-xhci", "x-rh-late-msi-cap", "off" },
+    /* hw_compat_rhel_8_3 from hw_compat_5_1 */
+    { "virtio-pci", "x-ats-page-aligned", "off"},
+};
+const size_t hw_compat_rhel_8_3_len = G_N_ELEMENTS(hw_compat_rhel_8_3);
+
+/*
+ * The same as hw_compat_4_2 + hw_compat_5_0
+ */
+GlobalProperty hw_compat_rhel_8_2[] = {
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "virtio-blk-device", "queue-size", "128"},
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "virtio-scsi-device", "virtqueue_size", "128"},
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "virtio-blk-device", "x-enable-wce-if-config-wce", "off" },
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "virtio-blk-device", "seg-max-adjust", "off"},
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "virtio-scsi-device", "seg_max_adjust", "off"},
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "vhost-blk-device", "seg_max_adjust", "off"},
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "usb-host", "suppress-remote-wake", "off" },
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "usb-redir", "suppress-remote-wake", "off" },
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "qxl", "revision", "4" },
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "qxl-vga", "revision", "4" },
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "fw_cfg", "acpi-mr-restore", "false" },
+    /* hw_compat_rhel_8_2 from hw_compat_4_2 */
+    { "virtio-device", "use-disabled-flag", "false" },
+    /* hw_compat_rhel_8_2 from hw_compat_5_0 */
+    { "pci-host-bridge", "x-config-reg-migration-enabled", "off" },
+    /* hw_compat_rhel_8_2 from hw_compat_5_0 */
+    { "virtio-balloon-device", "page-poison", "false" },
+    /* hw_compat_rhel_8_2 from hw_compat_5_0 */
+    { "vmport", "x-read-set-eax", "off" },
+    /* hw_compat_rhel_8_2 from hw_compat_5_0 */
+    { "vmport", "x-signal-unsupported-cmd", "off" },
+    /* hw_compat_rhel_8_2 from hw_compat_5_0 */
+    { "vmport", "x-report-vmx-type", "off" },
+    /* hw_compat_rhel_8_2 from hw_compat_5_0 */
+    { "vmport", "x-cmds-v2", "off" },
+    /* hw_compat_rhel_8_2 from hw_compat_5_0 */
+    { "virtio-device", "x-disable-legacy-check", "true" },
+};
+const size_t hw_compat_rhel_8_2_len = G_N_ELEMENTS(hw_compat_rhel_8_2);
+
+/*
+ * The same as hw_compat_4_1
+ */
+GlobalProperty hw_compat_rhel_8_1[] = {
+    /* hw_compat_rhel_8_1 from hw_compat_4_1 */
+    { "virtio-pci", "x-pcie-flr-init", "off" },
+};
+const size_t hw_compat_rhel_8_1_len = G_N_ELEMENTS(hw_compat_rhel_8_1);
+
+/* The same as hw_compat_3_1
+ * format of array has been changed by:
+ *     6c36bddf5340 ("machine: Use shorter format for GlobalProperty arrays")
+ */
+GlobalProperty hw_compat_rhel_8_0[] = {
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "pcie-root-port", "x-speed", "2_5" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "pcie-root-port", "x-width", "1" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "memory-backend-file", "x-use-canonical-path-for-ramblock-id", "true" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "memory-backend-memfd", "x-use-canonical-path-for-ramblock-id", "true" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "tpm-crb", "ppi", "false" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "tpm-tis", "ppi", "false" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "usb-kbd", "serial", "42" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "usb-mouse", "serial", "42" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "usb-tablet", "serial", "42" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "virtio-blk-device", "discard", "false" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 */
+    { "virtio-blk-device", "write-zeroes", "false" },
+    /* hw_compat_rhel_8_0 from hw_compat_4_0 */
+    { "VGA",            "edid", "false" },
+    /* hw_compat_rhel_8_0 from hw_compat_4_0 */
+    { "secondary-vga",  "edid", "false" },
+    /* hw_compat_rhel_8_0 from hw_compat_4_0 */
+    { "bochs-display",  "edid", "false" },
+    /* hw_compat_rhel_8_0 from hw_compat_4_0 */
+    { "virtio-vga",     "edid", "false" },
+    /* hw_compat_rhel_8_0 from hw_compat_4_0 */
+    { "virtio-gpu-device", "edid", "false" },
+    /* hw_compat_rhel_8_0 from hw_compat_4_0 */
+    { "virtio-device", "use-started", "false" },
+    /* hw_compat_rhel_8_0 from hw_compat_3_1 - that was added in 4.1 */
+    { "pcie-root-port-base", "disable-acs", "true" },
+};
+const size_t hw_compat_rhel_8_0_len = G_N_ELEMENTS(hw_compat_rhel_8_0);
+
+/* The same as hw_compat_3_0 + hw_compat_2_12
+ * except that
+ *   there's nothing in 3_0
+ *   migration.decompress-error-check=off was in 7.5 from bz 1584139
+ */
+GlobalProperty hw_compat_rhel_7_6[] = {
+    /* hw_compat_rhel_7_6 from hw_compat_2_12 */
+    { "hda-audio", "use-timer", "false" },
+    /* hw_compat_rhel_7_6 from hw_compat_2_12 */
+    { "cirrus-vga", "global-vmstate", "true" },
+    /* hw_compat_rhel_7_6 from hw_compat_2_12 */
+    { "VGA", "global-vmstate", "true" },
+    /* hw_compat_rhel_7_6 from hw_compat_2_12 */
+    { "vmware-svga", "global-vmstate", "true" },
+    /* hw_compat_rhel_7_6 from hw_compat_2_12 */
+    { "qxl-vga", "global-vmstate",  "true" },
+};
+const size_t hw_compat_rhel_7_6_len = G_N_ELEMENTS(hw_compat_rhel_7_6);
+
 MachineState *current_machine;
 
 static char *machine_get_kernel(Object *obj, Error **errp)
diff --git a/hw/i386/fw_cfg.c b/hw/i386/fw_cfg.c
index d802d2787f..c7aa39a13e 100644
--- a/hw/i386/fw_cfg.c
+++ b/hw/i386/fw_cfg.c
@@ -64,7 +64,8 @@ void fw_cfg_build_smbios(PCMachineState *pcms, FWCfgState *fw_cfg,
     if (pcmc->smbios_defaults) {
         /* These values are guest ABI, do not change */
         smbios_set_defaults("QEMU", mc->desc, mc->name,
-                            pcmc->smbios_uuid_encoded);
+                            pcmc->smbios_uuid_encoded,
+                            pcmc->smbios_stream_product, pcmc->smbios_stream_version);
     }
 
     /* tell smbios about cpuid version and features */
diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c
index 897c86ec41..2d0db43f49 100644
--- a/hw/net/rtl8139.c
+++ b/hw/net/rtl8139.c
@@ -3169,7 +3169,7 @@ static int rtl8139_pre_save(void *opaque)
 
 static const VMStateDescription vmstate_rtl8139 = {
     .name = "rtl8139",
-    .version_id = 5,
+    .version_id = 4,
     .minimum_version_id = 3,
     .post_load = rtl8139_post_load,
     .pre_save  = rtl8139_pre_save,
@@ -3250,7 +3250,9 @@ static const VMStateDescription vmstate_rtl8139 = {
         VMSTATE_UINT32(tally_counters.TxMCol, RTL8139State),
         VMSTATE_UINT64(tally_counters.RxOkPhy, RTL8139State),
         VMSTATE_UINT64(tally_counters.RxOkBrd, RTL8139State),
+#if 0 /* Disabled for Red Hat Enterprise Linux bz 1420195 */
         VMSTATE_UINT32_V(tally_counters.RxOkMul, RTL8139State, 5),
+#endif
         VMSTATE_UINT16(tally_counters.TxAbt, RTL8139State),
         VMSTATE_UINT16(tally_counters.TxUndrn, RTL8139State),
 
diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c
index eed5787b15..68608a3403 100644
--- a/hw/smbios/smbios.c
+++ b/hw/smbios/smbios.c
@@ -39,6 +39,10 @@ size_t usr_blobs_len;
 static unsigned usr_table_max;
 static unsigned usr_table_cnt;
 
+/* Set to true for modern Windows 10 HardwareID-6 compat */
+static bool smbios_type2_required;
+
+
 uint8_t *smbios_tables;
 size_t smbios_tables_len;
 unsigned smbios_table_max;
@@ -629,7 +633,7 @@ static void smbios_build_type_1_table(void)
 
 static void smbios_build_type_2_table(void)
 {
-    SMBIOS_BUILD_TABLE_PRE(2, T2_BASE, false); /* optional */
+    SMBIOS_BUILD_TABLE_PRE(2, T2_BASE, smbios_type2_required);
 
     SMBIOS_TABLE_SET_STR(2, manufacturer_str, type2.manufacturer);
     SMBIOS_TABLE_SET_STR(2, product_str, type2.product);
@@ -1018,16 +1022,52 @@ void smbios_set_default_processor_family(uint16_t processor_family)
 
 void smbios_set_defaults(const char *manufacturer, const char *product,
                          const char *version,
-                         bool uuid_encoded)
+                         bool uuid_encoded,
+                         const char *stream_product,
+                         const char *stream_version)
 {
     smbios_have_defaults = true;
     smbios_uuid_encoded = uuid_encoded;
 
+    /*
+     * If @stream_product & @stream_version are non-NULL, then
+     * we're following rules for new Windows driver support.
+     * The data we have to report is defined in this doc:
+     *
+     * https://docs.microsoft.com/en-us/windows-hardware/drivers/install/specifying-hardware-ids-for-a-computer
+     *
+     * The Windows drivers are written to expect use of the
+     * scheme documented as "HardwareID-6" against Windows 10,
+     * which uses SMBIOS System (Type 1) and Base Board (Type 2)
+     * tables and will match on
+     *
+     *   System Manufacturer = Red Hat     (@manufacturer)
+     *   System SKU Number = 8.2.0         (@stream_version)
+     *   Baseboard Manufacturer = Red Hat  (@manufacturer)
+     *   Baseboard Product = RHEL-AV       (@stream_product)
+     *
+     * NB, SKU must be changed with each RHEL-AV release
+     *
+     * Other fields can be freely used by applications using
+     * QEMU. For example apps can use the "System product"
+     * and "System version" to identify themselves.
+     *
+     * We get 'System Manufacturer' and 'Baseboard Manufacturer'
+     */
     SMBIOS_SET_DEFAULT(smbios_type1.manufacturer, manufacturer);
     SMBIOS_SET_DEFAULT(smbios_type1.product, product);
     SMBIOS_SET_DEFAULT(smbios_type1.version, version);
+    SMBIOS_SET_DEFAULT(smbios_type1.family, "Red Hat Enterprise Linux");
+    if (stream_version != NULL) {
+        SMBIOS_SET_DEFAULT(smbios_type1.sku, stream_version);
+    }
     SMBIOS_SET_DEFAULT(type2.manufacturer, manufacturer);
-    SMBIOS_SET_DEFAULT(type2.product, product);
+    if (stream_product != NULL) {
+        SMBIOS_SET_DEFAULT(type2.product, stream_product);
+        smbios_type2_required = true;
+    } else {
+        SMBIOS_SET_DEFAULT(type2.product, product);
+    }
     SMBIOS_SET_DEFAULT(type2.version, version);
     SMBIOS_SET_DEFAULT(type3.manufacturer, manufacturer);
     SMBIOS_SET_DEFAULT(type3.version, version);
diff --git a/hw/timer/i8254_common.c b/hw/timer/i8254_common.c
index 28fdabc321..bad13ec224 100644
--- a/hw/timer/i8254_common.c
+++ b/hw/timer/i8254_common.c
@@ -229,7 +229,7 @@ static const VMStateDescription vmstate_pit_common = {
     .pre_save = pit_dispatch_pre_save,
     .post_load = pit_dispatch_post_load,
     .fields = (const VMStateField[]) {
-        VMSTATE_UINT32_V(channels[0].irq_disabled, PITCommonState, 3),
+        VMSTATE_UINT32(channels[0].irq_disabled, PITCommonState), /* qemu-kvm's v2 had 'flags' here */
         VMSTATE_STRUCT_ARRAY(channels, PITCommonState, 3, 2,
                              vmstate_pit_channel, PITChannelState),
         VMSTATE_INT64(channels[0].next_transition_time,
diff --git a/hw/usb/hcd-xhci-pci.c b/hw/usb/hcd-xhci-pci.c
index 4423983308..43b4b71fdf 100644
--- a/hw/usb/hcd-xhci-pci.c
+++ b/hw/usb/hcd-xhci-pci.c
@@ -104,6 +104,33 @@ static int xhci_pci_vmstate_post_load(void *opaque, int version_id)
    return 0;
 }
 
+/* RH bz 1912846 */
+static bool usb_xhci_pci_add_msi(struct PCIDevice *dev, Error **errp)
+{
+    int ret;
+    Error *err = NULL;
+    XHCIPciState *s = XHCI_PCI(dev);
+
+    ret = msi_init(dev, 0x70, s->xhci.numintrs, true, false, &err);
+    /*
+     * Any error other than -ENOTSUP(board's MSI support is broken)
+     * is a programming error
+     */
+    assert(!ret || ret == -ENOTSUP);
+    if (ret && s->msi == ON_OFF_AUTO_ON) {
+        /* Can't satisfy user's explicit msi=on request, fail */
+        error_append_hint(&err, "You have to use msi=auto (default) or "
+                "msi=off with this machine type.\n");
+        error_propagate(errp, err);
+        return true;
+    }
+    assert(!err || s->msi == ON_OFF_AUTO_AUTO);
+    /* With msi=auto, we fall back to MSI off silently */
+    error_free(err);
+
+    return false;
+}
+
 static void usb_xhci_pci_realize(struct PCIDevice *dev, Error **errp)
 {
     int ret;
@@ -125,23 +152,12 @@ static void usb_xhci_pci_realize(struct PCIDevice *dev, Error **errp)
         s->xhci.nec_quirks = true;
     }
 
-    if (s->msi != ON_OFF_AUTO_OFF) {
-        ret = msi_init(dev, 0x70, s->xhci.numintrs, true, false, &err);
-        /*
-         * Any error other than -ENOTSUP(board's MSI support is broken)
-         * is a programming error
-         */
-        assert(!ret || ret == -ENOTSUP);
-        if (ret && s->msi == ON_OFF_AUTO_ON) {
-            /* Can't satisfy user's explicit msi=on request, fail */
-            error_append_hint(&err, "You have to use msi=auto (default) or "
-                    "msi=off with this machine type.\n");
+    if (s->msi != ON_OFF_AUTO_OFF && s->rh_late_msi_cap) {
+        /* This gives the behaviour from 5.2.0 onwards, lspci shows 90,a0,70 */
+        if (usb_xhci_pci_add_msi(dev, &err)) {
             error_propagate(errp, err);
             return;
         }
-        assert(!err || s->msi == ON_OFF_AUTO_AUTO);
-        /* With msi=auto, we fall back to MSI off silently */
-        error_free(err);
     }
     pci_register_bar(dev, 0,
                      PCI_BASE_ADDRESS_SPACE_MEMORY |
@@ -154,6 +170,14 @@ static void usb_xhci_pci_realize(struct PCIDevice *dev, Error **errp)
         assert(ret > 0);
     }
 
+    /* RH bz 1912846 */
+    if (s->msi != ON_OFF_AUTO_OFF && !s->rh_late_msi_cap) {
+        /* This gives the older RH machine behaviour, lspci shows 90,70,a0 */
+        if (usb_xhci_pci_add_msi(dev, &err)) {
+            error_propagate(errp, err);
+            return;
+        }
+    }
     if (s->msix != ON_OFF_AUTO_OFF) {
         /* TODO check for errors, and should fail when msix=on */
         msix_init(dev, s->xhci.numintrs,
@@ -198,11 +222,18 @@ static void xhci_instance_init(Object *obj)
     qdev_alias_all_properties(DEVICE(&s->xhci), obj);
 }
 
+static Property xhci_pci_properties[] = {
+    /* RH bz 1912846 */
+    DEFINE_PROP_BOOL("x-rh-late-msi-cap", XHCIPciState, rh_late_msi_cap, true),
+    DEFINE_PROP_END_OF_LIST()
+};
+
 static void xhci_class_init(ObjectClass *klass, void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
 
+    device_class_set_props(dc, xhci_pci_properties);
     dc->reset   = xhci_pci_reset;
     dc->vmsd    = &vmstate_xhci_pci;
     set_bit(DEVICE_CATEGORY_USB, dc->categories);
diff --git a/hw/usb/hcd-xhci-pci.h b/hw/usb/hcd-xhci-pci.h
index 08f70ce97c..1be7527c1b 100644
--- a/hw/usb/hcd-xhci-pci.h
+++ b/hw/usb/hcd-xhci-pci.h
@@ -40,6 +40,7 @@ typedef struct XHCIPciState {
     XHCIState xhci;
     OnOffAuto msi;
     OnOffAuto msix;
+    bool      rh_late_msi_cap;  /* bz 1912846 */
 } XHCIPciState;
 
 #endif
diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c
index ffd119ebac..0e2be2219c 100644
--- a/hw/virtio/virtio-mem.c
+++ b/hw/virtio/virtio-mem.c
@@ -1694,8 +1694,9 @@ static Property virtio_mem_properties[] = {
 #endif
     DEFINE_PROP_BOOL(VIRTIO_MEM_EARLY_MIGRATION_PROP, VirtIOMEM,
                      early_migration, true),
+    /* RHEL: default-enable "dynamic-memslots" (jira RHEL-24045) */
     DEFINE_PROP_BOOL(VIRTIO_MEM_DYNAMIC_MEMSLOTS_PROP, VirtIOMEM,
-                     dynamic_memslots, false),
+                     dynamic_memslots, true),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/include/hw/boards.h b/include/hw/boards.h
index 8b8f6d5c00..0466f9d0f3 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -512,4 +512,44 @@ extern const size_t hw_compat_2_2_len;
 extern GlobalProperty hw_compat_2_1[];
 extern const size_t hw_compat_2_1_len;
 
+extern GlobalProperty hw_compat_rhel_9_4[];
+extern const size_t hw_compat_rhel_9_4_len;
+
+extern GlobalProperty hw_compat_rhel_9_3[];
+extern const size_t hw_compat_rhel_9_3_len;
+
+extern GlobalProperty hw_compat_rhel_9_2[];
+extern const size_t hw_compat_rhel_9_2_len;
+
+extern GlobalProperty hw_compat_rhel_9_1[];
+extern const size_t hw_compat_rhel_9_1_len;
+
+extern GlobalProperty hw_compat_rhel_9_0[];
+extern const size_t hw_compat_rhel_9_0_len;
+
+extern GlobalProperty hw_compat_rhel_8_6[];
+extern const size_t hw_compat_rhel_8_6_len;
+
+extern GlobalProperty hw_compat_rhel_8_5[];
+extern const size_t hw_compat_rhel_8_5_len;
+
+extern GlobalProperty hw_compat_rhel_8_4[];
+extern const size_t hw_compat_rhel_8_4_len;
+
+extern GlobalProperty hw_compat_rhel_8_3[];
+extern const size_t hw_compat_rhel_8_3_len;
+
+extern GlobalProperty hw_compat_rhel_8_2[];
+extern const size_t hw_compat_rhel_8_2_len;
+
+extern GlobalProperty hw_compat_rhel_8_1[];
+extern const size_t hw_compat_rhel_8_1_len;
+
+extern GlobalProperty hw_compat_rhel_8_0[];
+extern const size_t hw_compat_rhel_8_0_len;
+
+extern GlobalProperty hw_compat_rhel_7_6[];
+extern const size_t hw_compat_rhel_7_6_len;
+
+extern const char *rhel_old_machine_deprecation;
 #endif
diff --git a/include/hw/firmware/smbios.h b/include/hw/firmware/smbios.h
index 8d3fb2fb3b..d9d6d7a169 100644
--- a/include/hw/firmware/smbios.h
+++ b/include/hw/firmware/smbios.h
@@ -332,7 +332,9 @@ void smbios_entry_add(QemuOpts *opts, Error **errp);
 void smbios_set_cpuid(uint32_t version, uint32_t features);
 void smbios_set_defaults(const char *manufacturer, const char *product,
                          const char *version,
-                         bool uuid_encoded);
+                         bool uuid_encoded,
+                         const char *stream_product,
+                         const char *stream_version);
 void smbios_set_default_processor_family(uint16_t processor_family);
 uint8_t *smbios_get_table_legacy(size_t *length, Error **errp);
 void smbios_get_tables(MachineState *ms,
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 27a68071d7..ebd8f973f2 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -112,6 +112,9 @@ struct PCMachineClass {
     bool smbios_legacy_mode;
     bool smbios_uuid_encoded;
     SmbiosEntryPointType default_smbios_ep_type;
+    /* New fields needed for Windows HardwareID-6 matching */
+    const char *smbios_stream_product;
+    const char *smbios_stream_version;
 
     /* RAM / address space compat: */
     bool gigabyte_align;
-- 
2.39.3