[PATCH 09/10] KVM: PPC: Support SC1 hypercalls for PAPR in PR mode
From: Alexander Graf <hidden>
Date: 2011-08-09 16:32:00
Also in:
kvm
Subsystem:
kernel virtual machine for powerpc (kvm/powerpc), linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
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 <redacted> --- 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 78dcf65..48558f6 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 */
--
1.6.0.2