]> git.baikalelectronics.ru Git - kernel.git/commit
powerpc/xive: Native exploitation of the XIVE interrupt controller
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 5 Apr 2017 07:54:50 +0000 (17:54 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Mon, 10 Apr 2017 11:41:34 +0000 (21:41 +1000)
commit4e9a0fc0cbadafe600db6377c2940c8c5539c8d1
treec4f605e98e6e8cf6dbe730c946142943b82ac38e
parent0c9e4cc1f0d516ee8f6538ae7c344581daabf285
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>
15 files changed:
arch/powerpc/include/asm/xive-regs.h [new file with mode: 0644]
arch/powerpc/include/asm/xive.h [new file with mode: 0644]
arch/powerpc/include/asm/xmon.h
arch/powerpc/kvm/book3s_hv_builtin.c
arch/powerpc/platforms/powernv/Kconfig
arch/powerpc/platforms/powernv/setup.c
arch/powerpc/platforms/powernv/smp.c
arch/powerpc/sysdev/Kconfig
arch/powerpc/sysdev/Makefile
arch/powerpc/sysdev/xive/Kconfig [new file with mode: 0644]
arch/powerpc/sysdev/xive/Makefile [new file with mode: 0644]
arch/powerpc/sysdev/xive/common.c [new file with mode: 0644]
arch/powerpc/sysdev/xive/native.c [new file with mode: 0644]
arch/powerpc/sysdev/xive/xive-internal.h [new file with mode: 0644]
arch/powerpc/xmon/xmon.c