search for: hv_spinlock

..."delay"/> </clock> ... <qemu:commandline>a <qemu:arg value='-machine'/> <qemu:arg value='kernel_irqchip=on'/> <qemu:arg value='-cpu'/> <qemu:arg value='host,migratable=no,+invtsc,hv_time,+kvm_pv_eoi,hv_relaxed,hv_spinlocks=0x1fff,hv_vendor_id=nv_fuck_you!,kvm=off'/> </qemu:commandline> The important part here is "host,migratable=no,+invtsc". It gives guest the invariant TSC (CPU must support it). This is a bit of a hack. Everything, except migratable=no, can be configured through proper XML e...

...less than 1MB/s Any clues? /usr/bin/qemu-system-x86_64 -machine accel=kvm -name win10-box -S -machine pc-i440fx-2.4,accel=kvm,usb=off,vmport=off -cpu SandyBridge,+osxsave,+pcid,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,kvm=off -m 4096 -realtime mlock=off -smp 4,sockets=4,cores=1,threads=1 -uuid d4a67adb-5d30-42f8-b8c6-d3c4598700f2 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/win10-box.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=...

...> > > > >/usr/bin/qemu-system-x86_64 -machine accel=kvm -name win10-box -S -machine >pc-i440fx-2.4,accel=kvm,usb=off,vmport=off -cpu >SandyBridge,+osxsave,+pcid,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff,kvm=off >-m 4096 -realtime mlock=off -smp 4,sockets=4,cores=1,threads=1 -uuid >d4a67adb-5d30-42f8-b8c6-d3c4598700f2 -no-user-config -nodefaults -chardev >socket,id=charmonitor,path=/var/lib/libvirt/qemu/win10-box.monitor,server,nowait >-mon chardev=charmonitor,id=monitor,mode=co...

....rdu2.centos.org), qemu version: 1.5.3 (qemu-kvm-1.5.3-126.el7), hostname: torden40.me.org LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin QEMU_AUDIO_DRV=spice /usr/libexec/qemu-kvm -name win10 -S -machine pc-i440fx-rhel7.0.0,accel=kvm,usb=off -cpu Conroe,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff -m 4096 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid f72e7ad5-98d4-44ab-aa85-347fe232b4e5 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-9-win10/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc bas...

.../arch/x86/hyperv/Makefile > @@ -1,6 +1,6 @@ > # SPDX-License-Identifier: GPL-2.0-only > obj-y := hv_init.o mmu.o nested.o > -obj-$(CONFIG_X86_64) += hv_apic.o > +obj-$(CONFIG_X86_64) += hv_apic.o hv_proc.o > > ifdef CONFIG_X86_64 > obj-$(CONFIG_PARAVIRT_SPINLOCKS) += hv_spinlock.o > diff --git a/arch/x86/hyperv/hv_proc.c b/arch/x86/hyperv/hv_proc.c > new file mode 100644 > index 000000000000..847c72465d0e > --- /dev/null > +++ b/arch/x86/hyperv/hv_proc.c > @@ -0,0 +1,209 @@ > +// SPDX-License-Identifier: GPL-2.0 > +#include <linux/types.h> &gt...