KVM: PPC: Book3S HV: Save host FSCR in the P7/8 path

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Similar to commit 25edcc50d7 ("KVM: PPC: Book3S HV: Save and restore
FSCR in the P9 path"), ensure the P7/8 path saves and restores the host
FSCR. The logic explained in that patch actually applies there to the
old path well: a context switch can be made before kvmppc_vcpu_run_hv
restores the host FSCR and returns.

Now both the p9 and the p7/8 paths now save and restore their FSCR, it
no longer needs to be restored at the end of kvmppc_vcpu_run_hv

Fixes: b005255e12 ("KVM: PPC: Book3S HV: Context-switch new POWER8 SPRs")
Cc: stable@vger.kernel.org # v3.14+
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/20210526125851.3436735-1-npiggin@gmail.com

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Nicholas Piggin 2021-05-26 22:58:51 +10:00 • committed by Michael Ellerman

parent d07f6ca923

commit 6ba53317d4

2 changed files with 7 additions and 1 deletions

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1

arch/powerpc/kvm/book3s_hv.c

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7

arch/powerpc/kvm/book3s_hv_rmhandlers.S

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