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KVM: PPC: Support SC1 hypercalls for PAPR in PR mode
PAPR defines hypercalls as SC1 instructions. Using these, the guest modifies page tables and does other privileged operations that it wouldn't be allowed to do in supervisor mode. This patch adds support for PR KVM to trap these instructions and route them through the same PAPR hypercall interface that we already use for HV style KVM. Signed-off-by: Alexander Graf <agraf@suse.de>
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1 changed files with 21 additions and 1 deletions
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@ -648,7 +648,27 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
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break;
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}
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case BOOK3S_INTERRUPT_SYSCALL:
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if (vcpu->arch.osi_enabled &&
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if (vcpu->arch.papr_enabled &&
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(kvmppc_get_last_inst(vcpu) == 0x44000022) &&
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!(vcpu->arch.shared->msr & MSR_PR)) {
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/* SC 1 papr hypercalls */
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ulong cmd = kvmppc_get_gpr(vcpu, 3);
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int i;
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if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
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r = RESUME_GUEST;
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break;
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}
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run->papr_hcall.nr = cmd;
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for (i = 0; i < 9; ++i) {
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ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
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run->papr_hcall.args[i] = gpr;
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}
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run->exit_reason = KVM_EXIT_PAPR_HCALL;
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vcpu->arch.hcall_needed = 1;
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r = RESUME_HOST;
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} else if (vcpu->arch.osi_enabled &&
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(((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
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(((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
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/* MOL hypercalls */
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