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119 files changed, 23723 insertions, 638 deletions
diff --git a/Documentation/ia64/kvm.txt b/Documentation/ia64/kvm.txt new file mode 100644 index 00000000000..bec9d815da3 --- /dev/null +++ b/Documentation/ia64/kvm.txt @@ -0,0 +1,82 @@ +Currently, kvm module in EXPERIMENTAL stage on IA64. This means that +interfaces are not stable enough to use. So, plase had better don't run +critical applications in virtual machine. We will try our best to make it +strong in future versions! + Guide: How to boot up guests on kvm/ia64 + +This guide is to describe how to enable kvm support for IA-64 systems. + +1. Get the kvm source from git.kernel.org. + Userspace source: + git clone git://git.kernel.org/pub/scm/virt/kvm/kvm-userspace.git + Kernel Source: + git clone git://git.kernel.org/pub/scm/linux/kernel/git/xiantao/kvm-ia64.git + +2. Compile the source code. + 2.1 Compile userspace code: + (1)cd ./kvm-userspace + (2)./configure + (3)cd kernel + (4)make sync LINUX= $kernel_dir (kernel_dir is the directory of kernel source.) + (5)cd .. + (6)make qemu + (7)cd qemu; make install + + 2.2 Compile kernel source code: + (1) cd ./$kernel_dir + (2) Make menuconfig + (3) Enter into virtualization option, and choose kvm. + (4) make + (5) Once (4) done, make modules_install + (6) Make initrd, and use new kernel to reboot up host machine. + (7) Once (6) done, cd $kernel_dir/arch/ia64/kvm + (8) insmod kvm.ko; insmod kvm-intel.ko + +Note: For step 2, please make sure that host page size == TARGET_PAGE_SIZE of qemu, otherwise, may fail. + +3. Get Guest Firmware named as Flash.fd, and put it under right place: + (1) If you have the guest firmware (binary) released by Intel Corp for Xen, use it directly. + + (2) If you have no firmware at hand, Please download its source from + hg clone http://xenbits.xensource.com/ext/efi-vfirmware.hg + you can get the firmware's binary in the directory of efi-vfirmware.hg/binaries. + + (3) Rename the firware you owned to Flash.fd, and copy it to /usr/local/share/qemu + +4. Boot up Linux or Windows guests: + 4.1 Create or install a image for guest boot. If you have xen experience, it should be easy. + + 4.2 Boot up guests use the following command. + /usr/local/bin/qemu-system-ia64 -smp xx -m 512 -hda $your_image + (xx is the number of virtual processors for the guest, now the maximum value is 4) + +5. Known possibile issue on some platforms with old Firmware. + +If meet strange host crashe issues, try to solve it through either of the following ways: + +(1): Upgrade your Firmware to the latest one. + +(2): Applying the below patch to kernel source. +diff --git a/arch/ia64/kernel/pal.S b/arch/ia64/kernel/pal.S +index 0b53344..f02b0f7 100644 +--- a/arch/ia64/kernel/pal.S ++++ b/arch/ia64/kernel/pal.S +@@ -84,7 +84,8 @@ GLOBAL_ENTRY(ia64_pal_call_static) + mov ar.pfs = loc1 + mov rp = loc0 + ;; +- srlz.d // seralize restoration of psr.l ++ srlz.i // seralize restoration of psr.l ++ ;; + br.ret.sptk.many b0 + END(ia64_pal_call_static) + +6. Bug report: + If you found any issues when use kvm/ia64, Please post the bug info to kvm-ia64-devel mailing list. + https://lists.sourceforge.net/lists/listinfo/kvm-ia64-devel/ + +Thanks for your interest! Let's work together, and make kvm/ia64 stronger and stronger! + + + Xiantao Zhang <xiantao.zhang@intel.com> + 2008.3.10 diff --git a/Documentation/ioctl-number.txt b/Documentation/ioctl-number.txt index c18363bd8d1..240ce7a56c4 100644 --- a/Documentation/ioctl-number.txt +++ b/Documentation/ioctl-number.txt @@ -183,6 +183,8 @@ Code Seq# Include File Comments 0xAC 00-1F linux/raw.h 0xAD 00 Netfilter device in development: <mailto:rusty@rustcorp.com.au> +0xAE all linux/kvm.h Kernel-based Virtual Machine + <mailto:kvm-devel@lists.sourceforge.net> 0xB0 all RATIO devices in development: <mailto:vgo@ratio.de> 0xB1 00-1F PPPoX <mailto:mostrows@styx.uwaterloo.ca> diff --git a/Documentation/powerpc/kvm_440.txt b/Documentation/powerpc/kvm_440.txt new file mode 100644 index 00000000000..c02a003fa03 --- /dev/null +++ b/Documentation/powerpc/kvm_440.txt @@ -0,0 +1,41 @@ +Hollis Blanchard <hollisb@us.ibm.com> +15 Apr 2008 + +Various notes on the implementation of KVM for PowerPC 440: + +To enforce isolation, host userspace, guest kernel, and guest userspace all +run at user privilege level. Only the host kernel runs in supervisor mode. +Executing privileged instructions in the guest traps into KVM (in the host +kernel), where we decode and emulate them. Through this technique, unmodified +440 Linux kernels can be run (slowly) as guests. Future performance work will +focus on reducing the overhead and frequency of these traps. + +The usual code flow is started from userspace invoking an "run" ioctl, which +causes KVM to switch into guest context. We use IVPR to hijack the host +interrupt vectors while running the guest, which allows us to direct all +interrupts to kvmppc_handle_interrupt(). At this point, we could either +- handle the interrupt completely (e.g. emulate "mtspr SPRG0"), or +- let the host interrupt handler run (e.g. when the decrementer fires), or +- return to host userspace (e.g. when the guest performs device MMIO) + +Address spaces: We take advantage of the fact that Linux doesn't use the AS=1 +address space (in host or guest), which gives us virtual address space to use +for guest mappings. While the guest is running, the host kernel remains mapped +in AS=0, but the guest can only use AS=1 mappings. + +TLB entries: The TLB entries covering the host linear mapping remain +present while running the guest. This reduces the overhead of lightweight +exits, which are handled by KVM running in the host kernel. We keep three +copies of the TLB: + - guest TLB: contents of the TLB as the guest sees it + - shadow TLB: the TLB that is actually in hardware while guest is running + - host TLB: to restore TLB state when context switching guest -> host +When a TLB miss occurs because a mapping was not present in the shadow TLB, +but was present in the guest TLB, KVM handles the fault without invoking the +guest. Large guest pages are backed by multiple 4KB shadow pages through this +mechanism. + +IO: MMIO and DCR accesses are emulated by userspace. We use virtio for network +and block IO, so those drivers must be enabled in the guest. It's possible +that some qemu device emulation (e.g. e1000 or rtl8139) may also work with +little effort. diff --git a/Documentation/s390/kvm.txt b/Documentation/s390/kvm.txt new file mode 100644 index 00000000000..6f5ceb0f09f --- /dev/null +++ b/Documentation/s390/kvm.txt @@ -0,0 +1,125 @@ +*** BIG FAT WARNING *** +The kvm module is currently in EXPERIMENTAL state for s390. This means that +the interface to the module is not yet considered to remain stable. Thus, be +prepared that we keep breaking your userspace application and guest +compatibility over and over again until we feel happy with the result. Make sure +your guest kernel, your host kernel, and your userspace launcher are in a +consistent state. + +This Documentation describes the unique ioctl calls to /dev/kvm, the resulting +kvm-vm file descriptors, and the kvm-vcpu file descriptors that differ from x86. + +1. ioctl calls to /dev/kvm +KVM does support the following ioctls on s390 that are common with other +architectures and do behave the same: +KVM_GET_API_VERSION +KVM_CREATE_VM (*) see note +KVM_CHECK_EXTENSION +KVM_GET_VCPU_MMAP_SIZE + |