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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-08-11 12:11:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-08-11 12:11:33 -0700 |
| commit | 30b229bdd88445c550efbeb076ffaa251eb05364 (patch) | |
| tree | 0f4e613cf4fdbb005b572dfed2dad073c6297f6b /arch/s390 | |
| parent | Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux (diff) | |
| parent | KVM: s390: fix pfmf non-quiescing control handling (diff) | |
| download | linux-dev-30b229bdd88445c550efbeb076ffaa251eb05364.tar.xz linux-dev-30b229bdd88445c550efbeb076ffaa251eb05364.zip | |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull s390 kvm fixes from Paolo Bonzini:
"Two fixes for s390"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: s390: fix pfmf non-quiescing control handling
KVM: s390: move kvm_guest_enter,exit closer to sie
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 21 | ||||
| -rw-r--r-- | arch/s390/kvm/priv.c | 4 |
2 files changed, 16 insertions, 9 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index ba694d2ba51e..34c1c9a90be2 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -702,14 +702,25 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) return rc; vcpu->arch.sie_block->icptcode = 0; - preempt_disable(); - kvm_guest_enter(); - preempt_enable(); VCPU_EVENT(vcpu, 6, "entering sie flags %x", atomic_read(&vcpu->arch.sie_block->cpuflags)); trace_kvm_s390_sie_enter(vcpu, atomic_read(&vcpu->arch.sie_block->cpuflags)); + + /* + * As PF_VCPU will be used in fault handler, between guest_enter + * and guest_exit should be no uaccess. + */ + preempt_disable(); + kvm_guest_enter(); + preempt_enable(); rc = sie64a(vcpu->arch.sie_block, vcpu->run->s.regs.gprs); + kvm_guest_exit(); + + VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", + vcpu->arch.sie_block->icptcode); + trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); + if (rc > 0) rc = 0; if (rc < 0) { @@ -721,10 +732,6 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); } } - VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", - vcpu->arch.sie_block->icptcode); - trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); - kvm_guest_exit(); memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); return rc; diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 0da3e6eb6be6..4cdc54e63ebc 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -16,6 +16,7 @@ #include <linux/errno.h> #include <linux/compat.h> #include <asm/asm-offsets.h> +#include <asm/facility.h> #include <asm/current.h> #include <asm/debug.h> #include <asm/ebcdic.h> @@ -532,8 +533,7 @@ static int handle_pfmf(struct kvm_vcpu *vcpu) return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); /* Only provide non-quiescing support if the host supports it */ - if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ && - S390_lowcore.stfl_fac_list & 0x00020000) + if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ && !test_facility(14)) return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); /* No support for conditional-SSKE */ |