diff options
Diffstat (limited to 'content/software/winvm.sh')
| -rw-r--r-- | content/software/winvm.sh | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/content/software/winvm.sh b/content/software/winvm.sh deleted file mode 100644 index 09283e0..0000000 --- a/content/software/winvm.sh +++ /dev/null @@ -1,144 +0,0 @@ -#!/bin/sh - - -# This is the script I used to use to launch QEMU, emulating -# Windows 8 with direct physical access to a powerful GPU -# and the Intel audio controller. This isn't a complete guide, -# more a collection of tips for any other brave people mad -# enough to try this. Look up "{VFIO,VGA,GPU,PCI} passthrough" -# if you want to get proper guidance for this. - -# This was working on QEMU 2.12, but note that I'm not updating it anymore. - - -# Create hugepage FS. Don't forget to actually populate it -# with available RAM using kernel boot arguments or sysctl. -# The user you run QEMU under (not root!) must be in the kvm group. -sudo mkdir /dev/hugepages -sudo mount -t hugetlbfs hugetlbfs /dev/hugepages -sudo chown root:kvm /dev/hugepages -sudo chmod 1777 /dev/hugepages # Necessary apparently - - -# The block devices you use for the VM are up to you; -# mine are at /dev/mapper/win{dows,data}. -# I recommend refreshing udev after you've created them: -udevadm trigger - - -### USEFUL KERNEL ARGUMENTS -# intel_iommu=on : VFIO won't work otherwise. I don't have an AMD CPU, -# but there should be a similar option for that. -# vfio-pci.ids=XXXX:YYYY,.. : Only available if VFIO is built into the kernel -# (requires custom kernel build). Reserves devices at boot. -# hugepages=X hugepagesz=Y : Create X hugepages at boot of size Y ("2M" or "1G"). -# nohugeiomap : This fixed something, but I can't remember what. -# intremap=no_x2apic_optout : Some UEFIs don't support the x2apic and disable it. -# This force-enables it. Had no negative consequences for me. -# pci=pcie_bus_peer2peer : This was the silver bullet for me, but YMMV. -# isolcpus=X-Y nohz_full=X-Y rcu_nocbs=X-Y : You MUST use CPU pinning if you add this. -# X-Y is an inclusive range of CPU cores to -# to reserve for the vCPUs. - - -### MACHINE OPTIONS -QEMU="-name debug-threads=on -enable-kvm -machine q35,accel=kvm,kernel_irqchip=on,vmport=off,mem-merge=off" -# -debug-threads=on : name the vCPU threads, useful for CPU pinning. -# -enable-kvm : enable KVM acceleration. -# -machine q35 : emulate the Q35 chipset, which is closer to a modern PC. -# accel=kvm : probably identical to -enable-kvm, but just in case. -# kernel_irqchip=on : emulate an IRQ chip in the kernel instead of in QEMU. -# vmport=off : don't emulate a VMWare I/O port. -# mem-merge=off : disable KSM, since there is only one VM. - -### CPU OPTIONS -QEMU="$QEMU -cpu host,kvm=off,hv_time,hv_relaxed,hv_spinlocks=0x1fff,hv_vpindex,hv_reset,hv_runtime,hv_crash,hv_vendor_id=NvidiaFix" -# -cpu host : use the host CPU instead of emulating one. -# kvm=off : don't declare self as KVM to the guest, as Windows doesn't care. -# hv_* : pretend to be Hyper-V, so Windows can optimize itself for running as a guest. -# https://www.reddit.com/r/VFIO/comments/479xnx/guests_with_nvidia_gpus_can_enable_hyperv/ -QEMU="$QEMU -smp sockets=1,cores=4,threads=1" -# -smp ... : processor layout to emulate. - -### RAM OPTIONS -QEMU="$QEMU -m 12G -mem-path /dev/hugepages -mem-prealloc" -# -m x : amount of guest RAM. -# -mem-path ... : allocate memory from this pool. Can be a file or "hugepages" (mount -t hugetlbfs). -# -mem-prealloc : allocate all memory from -mem-path at startup rather than on demand. - -### EMULATION OPTIONS -QEMU="$QEMU -vga none -nodefaults -rtc base=utc,clock=host,driftfix=none" -# -vga none : don't emulate a graphics card, since we're using a physical one. -# -nodefaults : don't emulate any of the default devices. -# -rtc base=utc : emulate an RTC starting at host's local time. -# clock=host : use the host's accurate clock for VM timekeeping. -# driftfix=none : don't fix Windows' clock drifting, as that involves injecting interrupts. -QEMU="$QEMU -drive if=pflash,format=raw,file=/usr/share/edk2-ovmf/OVMF_CODE.fd,readonly" -QEMU="$QEMU -drive if=pflash,format=raw,file=/usr/share/edk2-ovmf/OVMF_VARS.fd" -# These options enable using the OVMF virtual UEFI instead of SeaBIOS. -# The exact file locations might vary; this is for Gentoo. - -### PCI PASSTHROUGH -QEMU="$QEMU -device ioh3420,chassis=1,port=1,multifunction=on,bus=pcie.0,addr=1c.0,id=pcie.1" -# -device ioh3420 : emulate a PCIe I/O hub to attach the GPU to. -# chassis=1,port=1 : ? -# bus=pcie.0,addr=1c.0 : place it at 00:1c.0 on the guest. -# id=pcie.1 : refer to this device as "pcie.1" below. -QEMU="$QEMU -device vfio-pci,host=04:00.0,multifunction=on,bus=pcie.1,addr=00.0" -# GPU VGA controller. -# multifunction=on : this device isn't just a VGA controller. -# bus=pcie.1,addr=00.0 : attach it to the I/O hub as function 0. -QEMU="$QEMU -device vfio-pci,host=04:00.1,bus=pcie.1,addr=00.1" -# GPU HDMI audio controller. -# bus=pcie.1,addr=00.1 : attach it to the I/O hub as function 1. -QEMU="$QEMU -device vfio-pci,host=00:1b.0,bus=pcie.0,addr=1b.0" -# Intel HDA audio controller. -# bus=pcie.0,addr=1b.0 : place the device where Intel usually puts its HDA controller. - -#QEMU="$QEMU -device intel-iommu,intremap=on" -# Expose the IOMMU to the guest too. Probably useless in this case. - -### USB PASSTHROUGH -QEMU="$QEMU -usb" -# Enable USB support. -QEMU="$QEMU -device usb-host,vendorid=0xXXXX,productid=0xYYYY" -# If one of these can't be found, it's simply ignored. Use lsusb to find the IDs. - -### STORAGE OPTIONS -QEMU="$QEMU -drive if=ide,format=raw,discard=unmap,detect-zeroes=unmap,file=/dev/mapper/windows" -QEMU="$QEMU -drive if=ide,format=raw,discard=unmap,detect-zeroes=unmap,file=/dev/mapper/windata" -# if=ide : emulate an IDE (SATA) drive. NVMe is possible too, but more of a hassle. -# format=raw : talk directly to the drive. Take care: your guest GPT might end up inside a partition. -# discard=unmap,detect-zeroes=unmap : send discards to the physical device if the guest asks for it. -# file=x : backing physical block device. - -#QEMU="$QEMU -cdrom ~/Windows.iso" -# For recovery purposes. I strongly recommend keeping the ISO around. - -### NETWORK OPTIONS -QEMU="$QEMU -netdev user,id=usermode" -# -netdev user : emulate a user-mode NIC, which is more than fast enough in my experience. -# id=usermode : call the interface "usermode" -QEMU="$QEMU -device e1000,netdev=usermode,mac=88:88:88:88:88:88,bus=pcie.0,addr=19.0" -# -device e1000 : emulate a gigabit ethernet device. -# netdev=usermode : use "usermode" as the host backend. -# mac=x : set the MAC address as seen by the guest. -# bus=pcie.0,addr=19.0 : place the device where Intel usually puts its NIC. - - -# GERONIMO! -qemu-system-x86_64 $QEMU -daemonize -# -daemonize : fork once the VM has been initialized. - -QEMU_PID=`pidof qemu-system-x86_64` -echo -e "\033[37;1mQEMU started at PID $QEMU_PID, emulating Windows in Hyper-V mode.\033[m" - -sleep 2 # Make sure the VM threads have been spawned. - -# Move kernel processes to the housekeeping core (core 0 here). -#echo 00001 > /sys/bus/workqueue/devices/writeback/cpumask -#echo 00001 > /sys/bus/workqueue/devices/nvme-wq/cpumask - -# Do CPU pinning using "taskset -pc X Y" here, -# using /proc/$QEMU_PID/task/*/stat to find the thread name. -# Sorry, my old script for this was so horrible that I don't want to share it. |