summaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorMichael Mueller <mimu@linux.vnet.ibm.com>2017-05-30 14:26:02 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2018-01-26 10:47:29 +0100
commit19114beb73f774e466d9e39b8e8b961812c9f881 (patch)
tree97efdd67ed9840d92aa9a104c186ca7c2e61c297 /arch
parentc7901a6ebee4b624971361bbd93f21ab0b359786 (diff)
KVM: s390: define GISA format-0 data structure
In preperation to support pass-through adapter interrupts, the Guest Interruption State Area (GISA) and the Adapter Interruption Virtualization (AIV) features will be introduced here. This patch introduces format-0 GISA (that is defines the struct describing the GISA, allocates storage for it, and introduces fields for the GISA address in kvm_s390_sie_block and kvm_s390_vsie). As the GISA requires storage below 2GB, it is put in sie_page2, which is already allocated in ZONE_DMA. In addition, The GISA requires alignment to its integral boundary. This is already naturally aligned via the padding in the sie_page2. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com> Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Acked-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/include/asm/kvm_host.h23
-rw-r--r--arch/s390/kvm/kvm-s390.c1
2 files changed, 20 insertions, 4 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index d2351d63afa3..4f89b2783512 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -183,6 +183,7 @@ struct kvm_s390_sie_block {
#define ECA_IB 0x40000000
#define ECA_SIGPI 0x10000000
#define ECA_MVPGI 0x01000000
+#define ECA_AIV 0x00200000
#define ECA_VX 0x00020000
#define ECA_PROTEXCI 0x00002000
#define ECA_SII 0x00000001
@@ -227,7 +228,8 @@ struct kvm_s390_sie_block {
__u8 epdx; /* 0x0069 */
__u8 reserved6a[2]; /* 0x006a */
__u32 todpr; /* 0x006c */
- __u8 reserved70[16]; /* 0x0070 */
+ __u32 gd; /* 0x0070 */
+ __u8 reserved74[12]; /* 0x0074 */
__u64 mso; /* 0x0080 */
__u64 msl; /* 0x0088 */
psw_t gpsw; /* 0x0090 */
@@ -716,14 +718,27 @@ struct kvm_s390_crypto_cb {
struct kvm_s390_apcb1 apcb1; /* 0x0080 */
};
+struct kvm_s390_gisa {
+ u32 next_alert;
+ u8 ipm;
+ u8 reserved01;
+ u8 : 6;
+ u8 g : 1;
+ u8 c : 1;
+ u8 iam;
+ u8 reserved02[4];
+ u32 airq_count;
+};
+
/*
- * sie_page2 has to be allocated as DMA because fac_list and crycb need
- * 31bit addresses in the sie control block.
+ * sie_page2 has to be allocated as DMA because fac_list, crycb and
+ * gisa need 31bit addresses in the sie control block.
*/
struct sie_page2 {
__u64 fac_list[S390_ARCH_FAC_LIST_SIZE_U64]; /* 0x0000 */
struct kvm_s390_crypto_cb crycb; /* 0x0800 */
- u8 reserved900[0x1000 - 0x900]; /* 0x0900 */
+ struct kvm_s390_gisa gisa; /* 0x0900 */
+ u8 reserved910[0x1000 - 0x910]; /* 0x0910 */
};
struct kvm_s390_vsie {
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 3dd209de2e0c..2fbdb1601089 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1928,6 +1928,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
if (!kvm->arch.dbf)
goto out_err;
+ BUILD_BUG_ON(sizeof(struct sie_page2) != 4096);
kvm->arch.sie_page2 =
(struct sie_page2 *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!kvm->arch.sie_page2)