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| author | Nicholas Piggin <npiggin@gmail.com> | 2022-01-23 15:00:39 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-05-13 14:33:33 +0300 |
| commit | 5d506f159b2b9d0c9bee9bb43ccafb4f291143c2 (patch) | |
| tree | 3f1af91259d27e3c3b07e7400c36fe38207fec5c /arch/powerpc/kvm/book3s_hv_rmhandlers.S | |
| parent | 18827eeef022df43c1fdeca0fde00ca09405dff1 (diff) | |
| download | linux-5d506f159b2b9d0c9bee9bb43ccafb4f291143c2.tar.xz | |
KVM: PPC: Book3S HV: Update LPID allocator init for POWER9, Nested
The LPID allocator init is changed to:
- use mmu_lpid_bits rather than hard-coding;
- use KVM_MAX_NESTED_GUESTS for nested hypervisors;
- not reserve the top LPID on POWER9 and newer CPUs.
The reserved LPID is made a POWER7/8-specific detail.
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/20220123120043.3586018-3-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rmhandlers.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index d185dee26026..0c552885a032 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -51,6 +51,14 @@ #define STACK_SLOT_FSCR (SFS-96) /* + * Use the last LPID (all implemented LPID bits = 1) for partition switching. + * This is reserved in the LPID allocator. POWER7 only implements 0x3ff, but + * we write 0xfff into the LPID SPR anyway, which seems to work and just + * ignores the top bits. + */ +#define LPID_RSVD 0xfff + +/* * Call kvmppc_hv_entry in real mode. * Must be called with interrupts hard-disabled. * |