• Heiko Carstens's avatar
    KVM: s390: arch backend for the kvm kernel module · b0c632db
    Heiko Carstens authored
    This patch contains the port of Qumranet's kvm kernel module to IBM zSeries
     (aka s390x, mainframe) architecture. It uses the mainframe's virtualization
    instruction SIE to run virtual machines with up to 64 virtual CPUs each.
    This port is only usable on 64bit host kernels, and can only run 64bit guest
    kernels. However, running 31bit applications in guest userspace is possible.
    
    The following source files are introduced by this patch
    arch/s390/kvm/kvm-s390.c    similar to arch/x86/kvm/x86.c, this implements all
                                arch callbacks for kvm. __vcpu_run calls back into
                                sie64a to enter the guest machine context
    arch/s390/kvm/sie64a.S      assembler function sie64a, which enters guest
                                context via SIE, and switches world before and after                            that
    include/asm-s390/kvm_host.h contains all vital data structures needed to run
                                virtual machines on the mainframe
    include/asm-s390/kvm.h      defines kvm_regs and friends for user access to
                                guest register content
    arch/s390/kvm/gaccess.h     functions similar to uaccess to access guest memory
    arch/s390/kvm/kvm-s390.h    header file for kvm-s390 internals, extended by
                                later patches
    Acked-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
    Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
    Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
    Signed-off-by: default avatarCarsten Otte <cotte@de.ibm.com>
    Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
    b0c632db
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