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eacc818864
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Nicholas Piggin eacc818864 KVM: PPC: Book3S HV: POWER10 enable HAIL when running radix guests 
HV interrupts may be taken with the MMU enabled when radix guests are
running. Enable LPCR[HAIL] on ISA v3.1 processors for radix guests.
Make this depend on the host LPCR[HAIL] being enabled. Currently that is
always enabled, but having this test means any issue that might require
LPCR[HAIL] to be disabled in the host will not have to be duplicated in
KVM.

This optimisation takes 1380 cycles off a NULL hcall entry+exit micro
benchmark on a POWER10.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-9-npiggin@gmail.com
2021-11-24 21:08:57 +11:00
..
boot powerpc updates for 5.16 2021-11-05 08:15:46 -07:00
configs Merge branch 'akpm' (patches from Andrew) 2021-11-06 14:08:17 -07:00
crypto crypto: powepc/sha1 - remove unneeded semicolon 2021-03-07 15:13:14 +11:00
include powerpc/time: add API for KVM to re-arm the host timer/decrementer 2021-11-24 21:08:57 +11:00
kernel powerpc/time: add API for KVM to re-arm the host timer/decrementer 2021-11-24 21:08:57 +11:00
kexec powerpc/machdep: Remove stale functions from ppc_md structure 2021-10-22 15:22:05 +11:00
kvm KVM: PPC: Book3S HV: POWER10 enable HAIL when running radix guests 2021-11-24 21:08:57 +11:00
lib Kbuild updates for v5.16 2021-11-08 09:15:45 -08:00
math-emu powerpc/64s: avoid reloading (H)SRR registers if they are still valid 2021-06-25 00:06:55 +10:00
mm powerpc/book3e: Fix TLBCAM preset at boot 2021-11-16 21:20:59 +11:00
net powerpc updates for 5.16 2021-11-05 08:15:46 -07:00
perf powerpc updates for 5.16 2021-11-05 08:15:46 -07:00
platforms powerpc/64s: Remove WORT SPR from POWER9/10 (take 2) 2021-11-24 21:08:56 +11:00
purgatory powerpc/kexec: Don't use .machine ppc64 in trampoline_64.S 2021-04-08 21:17:43 +10:00
sysdev powerpc/xive: Change IRQ domain to a tree domain 2021-11-17 21:55:42 +11:00
tools powerpc/head_check: Fix shellcheck errors 2021-08-17 22:52:02 +10:00
xmon powerpc/64s: guard optional TIDR SPR with CPU ftr test 2021-11-24 21:08:56 +11:00
Kbuild kbuild: use more subdir- for visiting subdirectories while cleaning 2021-10-24 13:49:46 +09:00
Kconfig powerpc/64s: Default to 64K pages for 64 bit book3s 2021-10-27 22:31:22 +11:00
Kconfig.debug powerpc/ptdump: Convert powerpc to GENERIC_PTDUMP 2021-08-25 13:35:48 +10:00
Makefile Kbuild updates for v5.16 2021-11-08 09:15:45 -08:00
Makefile.postlink