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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-11-23 12:51:57 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-11-24 13:08:58 +0300 |
| commit | 34e119c96b2b381278d1ddf6b1708678462daba4 (patch) | |
| tree | 1fd025d1ff2fea5312a7f32232101c9cc49897ec /arch/powerpc/kvm/book3s_hv_p9_entry.c | |
| parent | 174a3ab633392859888fc1a5cff278d5546d8474 (diff) | |
| download | linux-34e119c96b2b381278d1ddf6b1708678462daba4.tar.xz | |
KVM: PPC: Book3S HV P9: Reduce mtmsrd instructions required to save host SPRs
This reduces the number of mtmsrd required to enable facility bits when
saving/restoring registers, by having the KVM code set all bits up front
rather than using individual facility functions that set their particular
MSR bits.
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/20211123095231.1036501-20-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_p9_entry.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_p9_entry.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_p9_entry.c b/arch/powerpc/kvm/book3s_hv_p9_entry.c index a7f63082b4e3..fb9cb34445ea 100644 --- a/arch/powerpc/kvm/book3s_hv_p9_entry.c +++ b/arch/powerpc/kvm/book3s_hv_p9_entry.c @@ -224,6 +224,7 @@ int kvmhv_vcpu_entry_p9(struct kvm_vcpu *vcpu, u64 time_limit, unsigned long lpc vc->tb_offset_applied = vc->tb_offset; } + /* Could avoid mfmsr by passing around, but probably no big deal */ msr = mfmsr(); host_hfscr = mfspr(SPRN_HFSCR); |