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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-11-23 12:52:16 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-11-24 13:09:01 +0300 |
| commit | 5236756d04454c7ce9f45e27b434d75b8d6f8759 (patch) | |
| tree | a08fc79104004a8a6fce3aeba9e823aa31b8a6ea /arch/powerpc/kvm/book3s_hv.h | |
| parent | 022ecb960c89faad42ff0b417a71d9255dd115a3 (diff) | |
| download | linux-5236756d04454c7ce9f45e27b434d75b8d6f8759.tar.xz | |
KVM: PPC: Book3S HV P9: Use Linux SPR save/restore to manage some host SPRs
Linux implements SPR save/restore including storage space for registers
in the task struct for process context switching. Make use of this
similarly to the way we make use of the context switching fp/vec save
restore.
This improves code reuse, allows some stack space to be saved, and helps
with avoiding VRSAVE updates if they are not required.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211123095231.1036501-39-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv.h')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.h b/arch/powerpc/kvm/book3s_hv.h index d7485b9e9762..6b7f07d9026b 100644 --- a/arch/powerpc/kvm/book3s_hv.h +++ b/arch/powerpc/kvm/book3s_hv.h @@ -4,11 +4,8 @@ * Privileged (non-hypervisor) host registers to save. */ struct p9_host_os_sprs { - unsigned long dscr; - unsigned long tidr; unsigned long iamr; unsigned long amr; - unsigned long fscr; unsigned int pmc1; unsigned int pmc2; |