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KVM: PPC: Book3S HV P9: Move remaining SPR and MSR access into low level entry
authorNicholas Piggin <npiggin@gmail.com>
Tue, 23 Nov 2021 09:52:09 +0000 (19:52 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Wed, 24 Nov 2021 10:09:00 +0000 (21:09 +1100)
commit15cc084854ab1eddcef53ae76bd71e14d803b731
treebe2385b08f62b1a05b8c795312878aeb429a1526tree | snapshot
parent40aa9899f7260d816b705a78a2ccf65a134e3358commit | diff
KVM: PPC: Book3S HV P9: Move remaining SPR and MSR access into low level entry

Move register saving and loading from kvmhv_p9_guest_entry() into the HV
and nested entry handlers.

Accesses are scheduled to reduce mtSPR / mfSPR interleaving which
reduces SPR scoreboard stalls.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-32-npiggin@gmail.com
arch/powerpc/kvm/book3s_hv.c diff | blob | history
arch/powerpc/kvm/book3s_hv_p9_entry.c diff | blob | history
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