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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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243e25112d
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>
31 lines
734 B
Plaintext
31 lines
734 B
Plaintext
config PPC_POWERNV
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depends on PPC64 && PPC_BOOK3S
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bool "IBM PowerNV (Non-Virtualized) platform support"
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select PPC_NATIVE
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select PPC_XICS
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select PPC_ICP_NATIVE
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select PPC_XIVE_NATIVE
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select PPC_P7_NAP
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select PCI
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select PCI_MSI
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select EPAPR_BOOT
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select PPC_INDIRECT_PIO
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select PPC_UDBG_16550
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select PPC_SCOM
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select ARCH_RANDOM
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select CPU_FREQ
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select CPU_FREQ_GOV_PERFORMANCE
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select CPU_FREQ_GOV_POWERSAVE
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select CPU_FREQ_GOV_USERSPACE
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select CPU_FREQ_GOV_ONDEMAND
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select CPU_FREQ_GOV_CONSERVATIVE
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select PPC_DOORBELL
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default y
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config OPAL_PRD
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tristate 'OPAL PRD driver'
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depends on PPC_POWERNV
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help
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This enables the opal-prd driver, a facility to run processor
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recovery diagnostics on OpenPower machines
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