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| author | Alexander Graf <agraf@suse.de> | 2011-08-08 17:26:24 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-09-25 19:52:25 +0300 |
| commit | a668f2bd3f14ce7f92e119f4b5d9b50cdc59e855 (patch) | |
| tree | 5ab8be22ed07e3b997c96d4393b25c8f5f2fca26 /arch/powerpc/kvm/book3s_pr.c | |
| parent | aacf9aa3a7762a878c40fddef6e68262b9f9f383 (diff) | |
| download | blackbird-obmc-linux-a668f2bd3f14ce7f92e119f4b5d9b50cdc59e855.tar.gz blackbird-obmc-linux-a668f2bd3f14ce7f92e119f4b5d9b50cdc59e855.zip | |
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>
Diffstat (limited to 'arch/powerpc/kvm/book3s_pr.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_pr.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index 78dcf659e120..48558f6176e9 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -648,7 +648,27 @@ program_interrupt: break; } case BOOK3S_INTERRUPT_SYSCALL: - if (vcpu->arch.osi_enabled && + if (vcpu->arch.papr_enabled && + (kvmppc_get_last_inst(vcpu) == 0x44000022) && + !(vcpu->arch.shared->msr & MSR_PR)) { + /* SC 1 papr hypercalls */ + ulong cmd = kvmppc_get_gpr(vcpu, 3); + int i; + + if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) { + r = RESUME_GUEST; + break; + } + + run->papr_hcall.nr = cmd; + for (i = 0; i < 9; ++i) { + ulong gpr = kvmppc_get_gpr(vcpu, 4 + i); + run->papr_hcall.args[i] = gpr; + } + run->exit_reason = KVM_EXIT_PAPR_HCALL; + vcpu->arch.hcall_needed = 1; + r = RESUME_HOST; + } else if (vcpu->arch.osi_enabled && (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) && (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) { /* MOL hypercalls */ |
