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authorAlexander Graf <agraf@suse.de>2011-08-08 17:26:24 +0200
committerAvi Kivity <avi@redhat.com>2011-09-25 19:52:25 +0300
commita668f2bd3f14ce7f92e119f4b5d9b50cdc59e855 (patch)
tree5ab8be22ed07e3b997c96d4393b25c8f5f2fca26 /arch/powerpc/kvm
parentaacf9aa3a7762a878c40fddef6e68262b9f9f383 (diff)
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')
-rw-r--r--arch/powerpc/kvm/book3s_pr.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 78dcf659e12..48558f6176e 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 */