KVM: ia64: Add a guide about how to create kvm guests on ia64

Guide for creating virtual machine on kvm/ia64.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/Documentation/ia64/kvm.txt b/Documentation/ia64/kvm.txt
new file mode 100644 (file)
index 0000000..bec9d81
--- /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