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Merge tag 'nmiforkvm' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kernelorgnext

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s390,kvm: provide plumbing for machines checks when running guests

This provides the basic plumbing for handling machine checks when
running guests
This commit is contained in:
Christian Borntraeger
2017-06-28 12:42:02 +02:00
parent 1cae025577 da72ca4d40
commit aec3b2c5f9
7 changed files with 115 additions and 12 deletions
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17
arch/s390/include/asm/kvm_host.h
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@@ -109,6 +109,20 @@ struct esca_block {
struct esca_entry cpu[KVM_S390_ESCA_CPU_SLOTS];
};
/*
* This struct is used to store some machine check info from lowcore
* for machine checks that happen while the guest is running.
* This info in host's lowcore might be overwritten by a second machine
* check from host when host is in the machine check's high-level handling.
* The size is 24 bytes.
*/
struct mcck_volatile_info {
__u64 mcic;
__u64 failing_storage_address;
__u32 ext_damage_code;
__u32 reserved;
};
#define CPUSTAT_STOPPED 0x80000000
#define CPUSTAT_WAIT 0x10000000
#define CPUSTAT_ECALL_PEND 0x08000000
@@ -266,7 +280,8 @@ struct kvm_s390_itdb {
struct sie_page {
struct kvm_s390_sie_block sie_block;
__u8 reserved200[1024]; /* 0x0200 */
struct mcck_volatile_info mcck_info; /* 0x0200 */
__u8 reserved218[1000]; /* 0x0218 */
struct kvm_s390_itdb itdb; /* 0x0600 */
__u8 reserved700[2304]; /* 0x0700 */
};