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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-28 14:35:31 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-28 14:35:31 -0700 |
commit | 2e7580b0e75d771d93e24e681031a165b1d31071 (patch) | |
tree | d9449702609eeaab28913a43b5a4434667e09d43 /arch/powerpc/kvm/emulate.c | |
parent | Merge git://github.com/rustyrussell/linux (diff) | |
parent | KVM: Convert intx_mask_lock to spin lock (diff) | |
download | linux-dev-2e7580b0e75d771d93e24e681031a165b1d31071.tar.xz linux-dev-2e7580b0e75d771d93e24e681031a165b1d31071.zip |
Merge branch 'kvm-updates/3.4' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm updates from Avi Kivity:
"Changes include timekeeping improvements, support for assigning host
PCI devices that share interrupt lines, s390 user-controlled guests, a
large ppc update, and random fixes."
This is with the sign-off's fixed, hopefully next merge window we won't
have rebased commits.
* 'kvm-updates/3.4' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (130 commits)
KVM: Convert intx_mask_lock to spin lock
KVM: x86: fix kvm_write_tsc() TSC matching thinko
x86: kvmclock: abstract save/restore sched_clock_state
KVM: nVMX: Fix erroneous exception bitmap check
KVM: Ignore the writes to MSR_K7_HWCR(3)
KVM: MMU: make use of ->root_level in reset_rsvds_bits_mask
KVM: PMU: add proper support for fixed counter 2
KVM: PMU: Fix raw event check
KVM: PMU: warn when pin control is set in eventsel msr
KVM: VMX: Fix delayed load of shared MSRs
KVM: use correct tlbs dirty type in cmpxchg
KVM: Allow host IRQ sharing for assigned PCI 2.3 devices
KVM: Ensure all vcpus are consistent with in-kernel irqchip settings
KVM: x86 emulator: Allow PM/VM86 switch during task switch
KVM: SVM: Fix CPL updates
KVM: x86 emulator: VM86 segments must have DPL 3
KVM: x86 emulator: Fix task switch privilege checks
arch/powerpc/kvm/book3s_hv.c: included linux/sched.h twice
KVM: x86 emulator: correctly mask pmc index bits in RDPMC instruction emulation
KVM: mmu_notifier: Flush TLBs before releasing mmu_lock
...
Diffstat (limited to 'arch/powerpc/kvm/emulate.c')
-rw-r--r-- | arch/powerpc/kvm/emulate.c | 61 |
1 files changed, 32 insertions, 29 deletions
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c index 141dce3c6810..968f40101883 100644 --- a/arch/powerpc/kvm/emulate.c +++ b/arch/powerpc/kvm/emulate.c @@ -13,6 +13,7 @@ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * * Copyright IBM Corp. 2007 + * Copyright 2011 Freescale Semiconductor, Inc. * * Authors: Hollis Blanchard <hollisb@us.ibm.com> */ @@ -69,54 +70,55 @@ #define OP_STH 44 #define OP_STHU 45 -#ifdef CONFIG_PPC_BOOK3S -static int kvmppc_dec_enabled(struct kvm_vcpu *vcpu) -{ - return 1; -} -#else -static int kvmppc_dec_enabled(struct kvm_vcpu *vcpu) -{ - return vcpu->arch.tcr & TCR_DIE; -} -#endif - void kvmppc_emulate_dec(struct kvm_vcpu *vcpu) { unsigned long dec_nsec; + unsigned long long dec_time; pr_debug("mtDEC: %x\n", vcpu->arch.dec); + hrtimer_try_to_cancel(&vcpu->arch.dec_timer); + #ifdef CONFIG_PPC_BOOK3S /* mtdec lowers the interrupt line when positive. */ kvmppc_core_dequeue_dec(vcpu); /* POWER4+ triggers a dec interrupt if the value is < 0 */ if (vcpu->arch.dec & 0x80000000) { - hrtimer_try_to_cancel(&vcpu->arch.dec_timer); kvmppc_core_queue_dec(vcpu); return; } #endif - if (kvmppc_dec_enabled(vcpu)) { - /* The decrementer ticks at the same rate as the timebase, so - * that's how we convert the guest DEC value to the number of - * host ticks. */ - - hrtimer_try_to_cancel(&vcpu->arch.dec_timer); - dec_nsec = vcpu->arch.dec; - dec_nsec *= 1000; - dec_nsec /= tb_ticks_per_usec; - hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec), - HRTIMER_MODE_REL); - vcpu->arch.dec_jiffies = get_tb(); - } else { - hrtimer_try_to_cancel(&vcpu->arch.dec_timer); - } + +#ifdef CONFIG_BOOKE + /* On BOOKE, DEC = 0 is as good as decrementer not enabled */ + if (vcpu->arch.dec == 0) + return; +#endif + + /* + * The decrementer ticks at the same rate as the timebase, so + * that's how we convert the guest DEC value to the number of + * host ticks. + */ + + dec_time = vcpu->arch.dec; + dec_time *= 1000; + do_div(dec_time, tb_ticks_per_usec); + dec_nsec = do_div(dec_time, NSEC_PER_SEC); + hrtimer_start(&vcpu->arch.dec_timer, + ktime_set(dec_time, dec_nsec), HRTIMER_MODE_REL); + vcpu->arch.dec_jiffies = get_tb(); } u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb) { u64 jd = tb - vcpu->arch.dec_jiffies; + +#ifdef CONFIG_BOOKE + if (vcpu->arch.dec < jd) + return 0; +#endif + return vcpu->arch.dec - jd; } @@ -159,7 +161,8 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu) case OP_TRAP_64: kvmppc_core_queue_program(vcpu, SRR1_PROGTRAP); #else - kvmppc_core_queue_program(vcpu, vcpu->arch.esr | ESR_PTR); + kvmppc_core_queue_program(vcpu, + vcpu->arch.shared->esr | ESR_PTR); #endif advance = 0; break; |