diff options
| author | Cédric Le Goater <clg@kaod.org> | 2019-04-18 12:39:29 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2019-04-30 11:35:16 +0200 |
| commit | 4131f83c3d64e591014dad14c7f8070c538b9422 (patch) | |
| tree | 660620043cb1deac6dcd4f1a1b1b31ca3a52dec7 /arch/powerpc/kvm/book3s_xive.h | |
| parent | KVM: PPC: Book3S HV: XIVE: Introduce a new capability KVM_CAP_PPC_IRQ_XIVE (diff) | |
| download | linux-4131f83c3d64e591014dad14c7f8070c538b9422.tar.xz linux-4131f83c3d64e591014dad14c7f8070c538b9422.zip | |
KVM: PPC: Book3S HV: XIVE: add a control to initialize a source
The XIVE KVM device maintains a list of interrupt sources for the VM
which are allocated in the pool of generic interrupts (IPIs) of the
main XIVE IC controller. These are used for the CPU IPIs as well as
for virtual device interrupts. The IRQ number space is defined by
QEMU.
The XIVE device reuses the source structures of the XICS-on-XIVE
device for the source blocks (2-level tree) and for the source
interrupts. Under XIVE native, the source interrupt caches mostly
configuration information and is less used than under the XICS-on-XIVE
device in which hcalls are still necessary at run-time.
When a source is initialized in KVM, an IPI interrupt source is simply
allocated at the OPAL level and then MASKED. KVM only needs to know
about its type: LSI or MSI.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'arch/powerpc/kvm/book3s_xive.h')
| -rw-r--r-- | arch/powerpc/kvm/book3s_xive.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_xive.h b/arch/powerpc/kvm/book3s_xive.h index d366df69b9cb..1be921cb5dcb 100644 --- a/arch/powerpc/kvm/book3s_xive.h +++ b/arch/powerpc/kvm/book3s_xive.h @@ -13,6 +13,13 @@ #include "book3s_xics.h" /* + * The XIVE Interrupt source numbers are within the range 0 to + * KVMPPC_XICS_NR_IRQS. + */ +#define KVMPPC_XIVE_FIRST_IRQ 0 +#define KVMPPC_XIVE_NR_IRQS KVMPPC_XICS_NR_IRQS + +/* * State for one guest irq source. * * For each guest source we allocate a HW interrupt in the XIVE @@ -258,6 +265,9 @@ extern int (*__xive_vm_h_eoi)(struct kvm_vcpu *vcpu, unsigned long xirr); */ void kvmppc_xive_disable_vcpu_interrupts(struct kvm_vcpu *vcpu); int kvmppc_xive_debug_show_queues(struct seq_file *m, struct kvm_vcpu *vcpu); +struct kvmppc_xive_src_block *kvmppc_xive_create_src_block( + struct kvmppc_xive *xive, int irq); +void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb); #endif /* CONFIG_KVM_XICS */ #endif /* _KVM_PPC_BOOK3S_XICS_H */ |