linux-kernel - [PATCH v6 10/13] KVM: s390: add kvm reference to struct sie

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Date:   Thu, 24 Jan 2019 13:59:36 +0100
From:   Michael Mueller <mimu@...ux.ibm.com>
To:     KVM Mailing List <kvm@...r.kernel.org>
Cc:     Linux-S390 Mailing List <linux-s390@...r.kernel.org>,
        linux-kernel@...r.kernel.org,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Halil Pasic <pasic@...ux.ibm.com>,
        Pierre Morel <pmorel@...ux.ibm.com>,
        Michael Mueller <mimu@...ux.ibm.com>
Subject: [PATCH v6 10/13] KVM: s390: add kvm reference to struct sie_page2

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 <mimu@...ux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@...ux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@...hat.com>
Reviewed-by: David Hildenbrand <david@...hat.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 397af0d33539..7077762ab460 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -801,7 +801,8 @@ 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 118d4c0bbb8e..67023d5656fd 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2210,6 +2210,7 @@ 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