From 4b9f952577fb40875a2a163d80515a8daa0d6bef Mon Sep 17 00:00:00 2001 From: Michael Mueller Date: Fri, 23 Jun 2017 13:51:25 +0200 Subject: KVM: s390: introduce the format-1 GISA The patch modifies the previously defined GISA data structure to be able to store two GISA formats, format-0 and format-1. Additionally, it verifies the availability of the GISA format facility and enables the use of a format-1 GISA in the SIE control block accordingly. A format-1 can do everything that format-0 can and we will need it for real HW passthrough. As there are systems with only format-0 we keep both variants. Signed-off-by: Michael Mueller Reviewed-by: Pierre Morel Reviewed-by: Christian Borntraeger Reviewed-by: David Hildenbrand Acked-by: Cornelia Huck Signed-off-by: Christian Borntraeger --- arch/s390/include/asm/kvm_host.h | 44 +++++++++++++++++++++++++++++++--------- 1 file changed, 34 insertions(+), 10 deletions(-) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 76d6f0ef3dbd..59dd46adf0e8 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -228,6 +228,7 @@ struct kvm_s390_sie_block { __u8 epdx; /* 0x0069 */ __u8 reserved6a[2]; /* 0x006a */ __u32 todpr; /* 0x006c */ +#define GISA_FORMAT1 0x00000001 __u32 gd; /* 0x0070 */ __u8 reserved74[12]; /* 0x0074 */ __u64 mso; /* 0x0080 */ @@ -719,15 +720,38 @@ struct kvm_s390_crypto_cb { }; 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; + union { + struct { /* common to all formats */ + u32 next_alert; + u8 ipm; + u8 reserved01[2]; + u8 iam; + }; + struct { /* format 0 */ + u32 next_alert; + u8 ipm; + u8 reserved01; + u8 : 6; + u8 g : 1; + u8 c : 1; + u8 iam; + u8 reserved02[4]; + u32 airq_count; + } g0; + struct { /* format 1 */ + u32 next_alert; + u8 ipm; + u8 simm; + u8 nimm; + u8 iam; + u8 aism[8]; + u8 : 6; + u8 g : 1; + u8 c : 1; + u8 reserved03[11]; + u32 airq_count; + } g1; + }; }; /* @@ -738,7 +762,7 @@ 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 reserved910[0x1000 - 0x910]; /* 0x0910 */ + u8 reserved920[0x1000 - 0x920]; /* 0x0920 */ }; struct kvm_s390_vsie { -- cgit