diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-04-17 20:30:26 +0000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2013-04-26 20:27:30 +0200 |
| commit | bc5ad3f3701116e7db57268e6f89010ec714697e (patch) | |
| tree | 21a00d1213598eab4dc0ae3fb03bb7ba3344185a /arch/powerpc/kvm/book3s_pr_papr.c | |
| parent | 8e591cb7204739efa8e15967ea334eb367039dde (diff) | |
KVM: PPC: Book3S: Add kernel emulation for the XICS interrupt controller
This adds in-kernel emulation of the XICS (eXternal Interrupt
Controller Specification) interrupt controller specified by PAPR, for
both HV and PR KVM guests.
The XICS emulation supports up to 1048560 interrupt sources.
Interrupt source numbers below 16 are reserved; 0 is used to mean no
interrupt and 2 is used for IPIs. Internally these are represented in
blocks of 1024, called ICS (interrupt controller source) entities, but
that is not visible to userspace.
Each vcpu gets one ICP (interrupt controller presentation) entity,
used to store the per-vcpu state such as vcpu priority, pending
interrupt state, IPI request, etc.
This does not include any API or any way to connect vcpus to their
ICP state; that will be added in later patches.
This is based on an initial implementation by Michael Ellerman
<michael@ellerman.id.au> reworked by Benjamin Herrenschmidt and
Paul Mackerras.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
[agraf: fix typo, add dependency on !KVM_MPIC]
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/book3s_pr_papr.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_pr_papr.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_pr_papr.c b/arch/powerpc/kvm/book3s_pr_papr.c index 4efa4a4f372..b24309c6c2d 100644 --- a/arch/powerpc/kvm/book3s_pr_papr.c +++ b/arch/powerpc/kvm/book3s_pr_papr.c @@ -227,6 +227,13 @@ static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu) return EMULATE_DONE; } +static int kvmppc_h_pr_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd) +{ + long rc = kvmppc_xics_hcall(vcpu, cmd); + kvmppc_set_gpr(vcpu, 3, rc); + return EMULATE_DONE; +} + int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd) { switch (cmd) { @@ -246,6 +253,13 @@ int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd) clear_bit(KVM_REQ_UNHALT, &vcpu->requests); vcpu->stat.halt_wakeup++; return EMULATE_DONE; + case H_XIRR: + case H_CPPR: + case H_EOI: + case H_IPI: + if (kvmppc_xics_enabled(vcpu)) + return kvmppc_h_pr_xics_hcall(vcpu, cmd); + break; case H_RTAS: if (list_empty(&vcpu->kvm->arch.rtas_tokens)) return RESUME_HOST; |