diff options
| author | Leonardo Bras <leobras.c@gmail.com> | 2020-12-08 18:57:08 -0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-15 22:22:06 +1100 |
| commit | 87fb4978ef8f7e3d6f51ea8e259638c4e96f2fc0 (patch) | |
| tree | da2251fb64224143d74aae2f702e6722be66bb7c /arch | |
| parent | a300bf8c5f24bdeaa84925d1e0ec6221cbdc7597 (diff) | |
| download | linux-87fb4978ef8f7e3d6f51ea8e259638c4e96f2fc0.tar.bz2 | |
KVM: PPC: Book3S HV: Fix mask size for emulated msgsndp
According to ISAv3.1 and ISAv3.0b, the msgsndp is described to split
RB in:
msgtype <- (RB) 32:36
payload <- (RB) 37:63
t <- (RB) 57:63
The current way of getting 'msgtype', and 't' is missing their MSB:
msgtype: ((arg >> 27) & 0xf) : Gets (RB) 33:36, missing bit 32
t: (arg &= 0x3f) : Gets (RB) 58:63, missing bit 57
Fixes this by applying the correct mask.
Signed-off-by: Leonardo Bras <leobras.c@gmail.com>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201208215707.31149-1-leobras.c@gmail.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index cfaa91b27112..6f612d240392 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -1241,9 +1241,9 @@ static int kvmppc_emulate_doorbell_instr(struct kvm_vcpu *vcpu) switch (get_xop(inst)) { case OP_31_XOP_MSGSNDP: arg = kvmppc_get_gpr(vcpu, rb); - if (((arg >> 27) & 0xf) != PPC_DBELL_SERVER) + if (((arg >> 27) & 0x1f) != PPC_DBELL_SERVER) break; - arg &= 0x3f; + arg &= 0x7f; if (arg >= kvm->arch.emul_smt_mode) break; tvcpu = kvmppc_find_vcpu(kvm, vcpu->vcpu_id - thr + arg); @@ -1256,7 +1256,7 @@ static int kvmppc_emulate_doorbell_instr(struct kvm_vcpu *vcpu) break; case OP_31_XOP_MSGCLRP: arg = kvmppc_get_gpr(vcpu, rb); - if (((arg >> 27) & 0xf) != PPC_DBELL_SERVER) + if (((arg >> 27) & 0x1f) != PPC_DBELL_SERVER) break; vcpu->arch.vcore->dpdes = 0; vcpu->arch.doorbell_request = 0; |