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| author | Michael Neuling <mikey@neuling.org> | 2018-03-27 15:37:21 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-27 23:55:32 +1100 |
| commit | e8ebedbf3131ce2db0c7092a27f752ab365eef53 (patch) | |
| tree | 07da44b7f87118b72475f66ddd62b72843ceeba7 /arch/powerpc/kvm | |
| parent | 398e712c007fbd0bf996d25eb6b39d8314c50db4 (diff) | |
| download | linux-e8ebedbf3131ce2db0c7092a27f752ab365eef53.tar.bz2 | |
KVM: PPC: Book3S HV: Return error from h_set_dabr() on POWER9
POWER7 compat mode guests can use h_set_dabr on POWER9. POWER9 should
use the DAWR but since it's disabled there we can't.
This returns H_UNSUPPORTED on a h_set_dabr() on POWER9 where the DAWR
is disabled.
Current Linux guests ignore this error, so they will silently not get
the DAWR (sigh). The same error code is being used by POWERVM in this
case.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kvm')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 736809fba912..3d1023b03d5a 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -2563,8 +2563,14 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) li r3,0 blr +2: +BEGIN_FTR_SECTION + /* POWER9 with disabled DAWR */ + li r3, H_UNSUPPORTED + blr +END_FTR_SECTION_IFCLR(CPU_FTR_DAWR) /* Emulate H_SET_DABR/X on P8 for the sake of compat mode guests */ -2: rlwimi r5, r4, 5, DAWRX_DR | DAWRX_DW + rlwimi r5, r4, 5, DAWRX_DR | DAWRX_DW rlwimi r5, r4, 2, DAWRX_WT clrrdi r4, r4, 3 std r4, VCPU_DAWR(r3) |