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| author |   Christian Borntraeger <borntraeger@de.ibm.com> | 2015-04-09 13:49:04 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2015-05-08 15:51:14 +0200 |
| commit | 8e23654687c97df1c0e4b1def245a05001eaf640 (patch) | |
| tree | 6b03aee4f322771861214c72788be2c4fe48e118 /arch/s390/include/asm/kvm_host.h | |
| parent | KVM: s390: Enable guest EDAT2 support (diff) | |
| download | linux-dev-8e23654687c97df1c0e4b1def245a05001eaf640.tar.xz linux-dev-8e23654687c97df1c0e4b1def245a05001eaf640.zip | |
KVM: s390: make exit_sie_sync more robust
exit_sie_sync is used to kick CPUs out of SIE and prevent reentering at
any point in time. This is used to reload the prefix pages and to
set the IBS stuff in a way that guarantees that after this function
returns we are no longer in SIE. All current users trigger KVM requests.
The request must be set before we block the CPUs to avoid races. Let's
make this implicit by adding the request into a new function
kvm_s390_sync_requests that replaces exit_sie_sync and split out
s390_vcpu_block and s390_vcpu_unblock, that can be used to keep
CPUs out of SIE independent of requests.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/kvm_host.h')
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 1011ac1434f5..444c412307cb 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -96,7 +96,8 @@ struct kvm_s390_sie_block { #define PROG_IN_SIE (1<<0) __u32 prog0c; /* 0x000c */ __u8 reserved10[16]; /* 0x0010 */ -#define PROG_BLOCK_SIE 0x00000001 +#define PROG_BLOCK_SIE (1<<0) +#define PROG_REQUEST (1<<1) atomic_t prog20; /* 0x0020 */ __u8 reserved24[4]; /* 0x0024 */ __u64 cputm; /* 0x0028 */ |