[Qemu-devel] [PATCH] -machine vmport=off: Allow disabling of VMWare ioport emulation

["Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

VMWare apparently doesn't like running under QEMU due to our
incomplete emulation of it's special IO Port.  This adds a
-machine suboption to allow it to be turned off.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 hw/i386/pc_piix.c | 5 +++--
 hw/i386/pc_q35.c  | 5 ++++-
 qemu-options.hx   | 3 +++
 vl.c              | 4 ++++
 4 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index eaf3e61..418f95a 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -204,8 +204,9 @@ static void pc_init1(QEMUMachineInitArgs *args,
     pc_vga_init(isa_bus, pci_enabled ? pci_bus : NULL);
 
     /* init basic PC hardware */
-    pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy, xen_enabled(),
-        0x4);
+    pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy,
+                         !qemu_opt_get_bool(qemu_get_machine_opts(), "vmport",
+                                            true) || xen_enabled(), 0x4);
 
     pc_nic_init(isa_bus, pci_bus);
 
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 9517ec6..c868af1 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -206,7 +206,10 @@ static void pc_q35_init(QEMUMachineInitArgs *args)
     pc_register_ferr_irq(gsi[13]);
 
     /* init basic PC hardware */
-    pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy, false, 0xff0104);
+    pc_basic_device_init(isa_bus, gsi, &rtc_state, &floppy,
+                         !qemu_opt_get_bool(qemu_get_machine_opts(), "vmport",
+                                            true),
+                         0xff0104);
 
     /* connect pm stuff to lpc */
     ich9_lpc_pm_init(lpc);
diff --git a/qemu-options.hx b/qemu-options.hx
index 781af14..54e8f94 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -33,6 +33,7 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
     "                property accel=accel1[:accel2[:...]] selects accelerator\n"
     "                supported accelerators are kvm, xen, tcg (default: tcg)\n"
     "                kernel_irqchip=on|off controls accelerated irqchip support\n"
+    "                vmport=on|off controls emulation of vmport (default: on)\n"
     "                kvm_shadow_mem=size of KVM shadow MMU\n"
     "                dump-guest-core=on|off include guest memory in a core dump (default=on)\n"
     "                mem-merge=on|off controls memory merge support (default: on)\n",
@@ -50,6 +51,8 @@ than one accelerator specified, the next one is used if the previous one fails
 to initialize.
 @item kernel_irqchip=on|off
 Enables in-kernel irqchip support for the chosen accelerator when available.
+@item vmport=on|off
+Enables emulation of VMWare IO port, for vmmouse etc. (enabled by default)
 @item kvm_shadow_mem=size
 Defines the size of the KVM shadow MMU.
 @item dump-guest-core=on|off
diff --git a/vl.c b/vl.c
index 99b6fc0..eb26c77 100644
--- a/vl.c
+++ b/vl.c
@@ -331,6 +331,10 @@ static QemuOptsList qemu_machine_opts = {
             .type = QEMU_OPT_BOOL,
             .help = "use KVM in-kernel irqchip",
         }, {
+            .name = "vmport",
+            .type = QEMU_OPT_BOOL,
+            .help = "Enable vmport",
+        }, {
             .name = "kvm_shadow_mem",
             .type = QEMU_OPT_SIZE,
             .help = "KVM shadow MMU size",
-- 
1.9.0