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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2017-04-05 10:54:50 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-10 14:41:34 +0300 |
| commit | 243e25112d06b348f087a6f7aba4bbc288285bdd (patch) | |
| tree | c4f605e98e6e8cf6dbe730c946142943b82ac38e /arch/powerpc/platforms/powernv/Kconfig | |
| parent | a978e13965a40ac07163643cc3fa0ddb0d354198 (diff) | |
| download | linux-243e25112d06b348f087a6f7aba4bbc288285bdd.tar.xz | |
powerpc/xive: Native exploitation of the XIVE interrupt controller
The XIVE interrupt controller is the new interrupt controller
found in POWER9. It supports advanced virtualization capabilities
among other things.
Currently we use a set of firmware calls that simulate the old
"XICS" interrupt controller but this is fairly inefficient.
This adds the framework for using XIVE along with a native
backend which OPAL for configuration. Later, a backend allowing
the use in a KVM or PowerVM guest will also be provided.
This disables some fast path for interrupts in KVM when XIVE is
enabled as these rely on the firmware emulation code which is no
longer available when the XIVE is used natively by Linux.
A latter patch will make KVM also directly exploit the XIVE, thus
recovering the lost performance (and more).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[mpe: Fixup pr_xxx("XIVE:"...), don't split pr_xxx() strings,
tweak Kconfig so XIVE_NATIVE selects XIVE and depends on POWERNV,
fix build errors when SMP=n, fold in fixes from Ben:
Don't call cpu_online() on an invalid CPU number
Fix irq target selection returning out of bounds cpu#
Extra sanity checks on cpu numbers
]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/powernv/Kconfig')
| -rw-r--r-- | arch/powerpc/platforms/powernv/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig index 3a07e4dcf97c..9689a6272995 100644 --- a/arch/powerpc/platforms/powernv/Kconfig +++ b/arch/powerpc/platforms/powernv/Kconfig @@ -4,6 +4,7 @@ config PPC_POWERNV select PPC_NATIVE select PPC_XICS select PPC_ICP_NATIVE + select PPC_XIVE_NATIVE select PPC_P7_NAP select PCI select PCI_MSI |