KVM: s390: arch backend for the kvm kernel module
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: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 3bd3828..2367ff0 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -205,6 +205,11 @@
__u64 vapic_addr;
};
+struct kvm_s390_psw {
+ __u64 mask;
+ __u64 addr;
+};
+
#define KVMIO 0xAE
/*
@@ -213,6 +218,8 @@
#define KVM_GET_API_VERSION _IO(KVMIO, 0x00)
#define KVM_CREATE_VM _IO(KVMIO, 0x01) /* returns a VM fd */
#define KVM_GET_MSR_INDEX_LIST _IOWR(KVMIO, 0x02, struct kvm_msr_list)
+
+#define KVM_S390_ENABLE_SIE _IO(KVMIO, 0x06)
/*
* Check if a kvm extension is available. Argument is extension number,
* return is 1 (yes) or 0 (no, sorry).
@@ -291,5 +298,13 @@
#define KVM_TPR_ACCESS_REPORTING _IOWR(KVMIO, 0x92, struct kvm_tpr_access_ctl)
/* Available with KVM_CAP_VAPIC */
#define KVM_SET_VAPIC_ADDR _IOW(KVMIO, 0x93, struct kvm_vapic_addr)
+/* store status for s390 */
+#define KVM_S390_STORE_STATUS_NOADDR (-1ul)
+#define KVM_S390_STORE_STATUS_PREFIXED (-2ul)
+#define KVM_S390_STORE_STATUS _IOW(KVMIO, 0x95, unsigned long)
+/* initial ipl psw for s390 */
+#define KVM_S390_SET_INITIAL_PSW _IOW(KVMIO, 0x96, struct kvm_s390_psw)
+/* initial reset for s390 */
+#define KVM_S390_INITIAL_RESET _IO(KVMIO, 0x97)
#endif