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| author | Cédric Le Goater <clg@kaod.org> | 2019-04-18 13:39:29 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2019-04-30 12:35:16 +0300 |
| commit | 4131f83c3d64e591014dad14c7f8070c538b9422 (patch) | |
| tree | 660620043cb1deac6dcd4f1a1b1b31ca3a52dec7 /arch/powerpc/kvm/book3s_xive.c | |
| parent | eacc56bb9de3e6830ddc169553772cd6de59ee4c (diff) | |
| download | linux-4131f83c3d64e591014dad14c7f8070c538b9422.tar.xz | |
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.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_xive.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/powerpc/kvm/book3s_xive.c b/arch/powerpc/kvm/book3s_xive.c index e7f1ada1c3de..6c9f9fd0855f 100644 --- a/arch/powerpc/kvm/book3s_xive.c +++ b/arch/powerpc/kvm/book3s_xive.c @@ -1480,8 +1480,8 @@ static int xive_get_source(struct kvmppc_xive *xive, long irq, u64 addr) return 0; } -static struct kvmppc_xive_src_block *xive_create_src_block(struct kvmppc_xive *xive, - int irq) +struct kvmppc_xive_src_block *kvmppc_xive_create_src_block( + struct kvmppc_xive *xive, int irq) { struct kvm *kvm = xive->kvm; struct kvmppc_xive_src_block *sb; @@ -1560,7 +1560,7 @@ static int xive_set_source(struct kvmppc_xive *xive, long irq, u64 addr) sb = kvmppc_xive_find_source(xive, irq, &idx); if (!sb) { pr_devel("No source, creating source block...\n"); - sb = xive_create_src_block(xive, irq); + sb = kvmppc_xive_create_src_block(xive, irq); if (!sb) { pr_devel("Failed to create block...\n"); return -ENOMEM; @@ -1784,7 +1784,7 @@ static void kvmppc_xive_cleanup_irq(u32 hw_num, struct xive_irq_data *xd) xive_cleanup_irq_data(xd); } -static void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb) +void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb) { int i; |