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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-04-12 11:48:38 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-04-12 13:36:23 +1000 |
| commit | 72c15287210f7433f5fcb55452b05e4b6ccc6c15 (patch) | |
| tree | ab3f8f33dd2a75e985a56c0f49b23540f78cfb30 /arch/powerpc/kvm/book3s_hv.c | |
| parent | bcc92a0d6d6eae1e7b34a88f58ae69c081d85f97 (diff) | |
| download | linux-72c15287210f7433f5fcb55452b05e4b6ccc6c15.tar.gz linux-72c15287210f7433f5fcb55452b05e4b6ccc6c15.tar.bz2 linux-72c15287210f7433f5fcb55452b05e4b6ccc6c15.zip | |
KVM: PPC: Book3S HV: Prevent radix guests setting LPCR[TC]
Prevent radix guests setting LPCR[TC]. This bit only applies to hash
partitions.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210412014845.1517916-6-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 3de8a1f89a7d..70c6e9c27eb7 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -1645,6 +1645,10 @@ static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, */ unsigned long kvmppc_filter_lpcr_hv(struct kvm *kvm, unsigned long lpcr) { + /* LPCR_TC only applies to HPT guests */ + if (kvm_is_radix(kvm)) + lpcr &= ~LPCR_TC; + /* On POWER8 and above, userspace can modify AIL */ if (!cpu_has_feature(CPU_FTR_ARCH_207S)) lpcr &= ~LPCR_AIL; |