diff options
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/entry.S | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 28 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.h | 2 |
4 files changed, 22 insertions, 13 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 */ diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S index 99b44acbfcc7..3238893c9d4f 100644 --- a/arch/s390/kernel/entry.S +++ b/arch/s390/kernel/entry.S @@ -1005,7 +1005,7 @@ ENTRY(sie64a) .Lsie_gmap: lg %r14,__SF_EMPTY(%r15) # get control block pointer oi __SIE_PROG0C+3(%r14),1 # we are going into SIE now - tm __SIE_PROG20+3(%r14),1 # last exit... + tm __SIE_PROG20+3(%r14),3 # last exit... jnz .Lsie_done LPP __SF_EMPTY(%r15) # set guest id sie 0(%r14) diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 142d9b40528d..9bc57afe54ba 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -1424,6 +1424,16 @@ void s390_vcpu_unblock(struct kvm_vcpu *vcpu) atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); } +static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) +{ + atomic_set_mask(PROG_REQUEST, &vcpu->arch.sie_block->prog20); +} + +static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) +{ + atomic_clear_mask(PROG_REQUEST, &vcpu->arch.sie_block->prog20); +} + /* * Kick a guest cpu out of SIE and wait until SIE is not running. * If the CPU is not running (e.g. waiting as idle) the function will @@ -1435,10 +1445,11 @@ void exit_sie(struct kvm_vcpu *vcpu) cpu_relax(); } -/* Kick a guest cpu out of SIE and prevent SIE-reentry */ -void exit_sie_sync(struct kvm_vcpu *vcpu) +/* Kick a guest cpu out of SIE to process a request synchronously */ +void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) { - s390_vcpu_block(vcpu); + kvm_make_request(req, vcpu); + kvm_s390_vcpu_request(vcpu); exit_sie(vcpu); } @@ -1452,8 +1463,7 @@ static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) /* match against both prefix pages */ if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); - kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); - exit_sie_sync(vcpu); + kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); } } } @@ -1728,7 +1738,7 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) if (!vcpu->requests) return 0; retry: - s390_vcpu_unblock(vcpu); + kvm_s390_vcpu_request_handled(vcpu); /* * We use MMU_RELOAD just to re-arm the ipte notifier for the * guest prefix page. gmap_ipte_notify will wait on the ptl lock. @@ -2213,8 +2223,7 @@ int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr) static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) { kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); - kvm_make_request(KVM_REQ_DISABLE_IBS, vcpu); - exit_sie_sync(vcpu); + kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); } static void __disable_ibs_on_all_vcpus(struct kvm *kvm) @@ -2230,8 +2239,7 @@ static void __disable_ibs_on_all_vcpus(struct kvm *kvm) static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) { kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); - kvm_make_request(KVM_REQ_ENABLE_IBS, vcpu); - exit_sie_sync(vcpu); + kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); } void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index ca108b90ae56..8edca85e246e 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -214,7 +214,7 @@ void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); void s390_vcpu_block(struct kvm_vcpu *vcpu); void s390_vcpu_unblock(struct kvm_vcpu *vcpu); void exit_sie(struct kvm_vcpu *vcpu); -void exit_sie_sync(struct kvm_vcpu *vcpu); +void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); /* is cmma enabled */ |