[PATCH v5 09/15] KVM: s390: add kvm reference to struct sie_page2

[Michael Mueller]

Adding the kvm reference to struct sie_page2 will allow to
determine the kvm a given gisa belongs to:

  container_of(gisa, struct sie_page2, gisa)->kvm

This functionality will be required to process a gisa in
gib alert interruption context.

Signed-off-by: Michael Mueller <m...@linux.ibm.com>
Reviewed-by: Pierre Morel <pmo...@linux.ibm.com>
Reviewed-by: Cornelia Huck <coh...@redhat.com>
Reviewed-by: David Hildenbrand <da...@redhat.com>
---
 arch/s390/include/asm/kvm_host.h | 3 ++-
 arch/s390/kvm/kvm-s390.c         | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index 537e5e59f27e..0deba3ae8bc7 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -802,7 +802,8 @@ struct sie_page2 {
        __u64 fac_list[S390_ARCH_FAC_LIST_SIZE_U64];    /* 0x0000 */
        struct kvm_s390_crypto_cb crycb;                /* 0x0800 */
        struct kvm_s390_gisa gisa;                      /* 0x0900 */
-       u8 reserved920[0x1000 - 0x920];                 /* 0x0920 */
+       struct kvm *kvm;                                /* 0x0920 */
+       u8 reserved928[0x1000 - 0x928];                 /* 0x0928 */
 };
 
 struct kvm_s390_vsie {
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 7bc24e16a31d..2d10e175862c 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2220,6 +2220,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
        if (!kvm->arch.sie_page2)
                goto out_err;
 
+       kvm->arch.sie_page2->kvm = kvm;
        kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
 
        for (i = 0; i < kvm_s390_fac_size(); i++) {
-- 
2.13.4