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From: ehrhardt@linux.vnet.ibm.com
To: kvm-ppc@vger.kernel.org, embedded-hypervisor@power.org,
	linuxppc-dev@ozlabs.org
Cc: hollisb@us.ibm.com
Subject: [PATCH 2/6] kvmppc: add hypercall infrastructure - host part
Date: Wed, 23 Jul 2008 10:36:43 +0200	[thread overview]
Message-ID: <1216802207-32675-3-git-send-email-ehrhardt@linux.vnet.ibm.com> (raw)
In-Reply-To: <1216802207-32675-1-git-send-email-ehrhardt@linux.vnet.ibm.com>

From: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>

This adds the host portion of the hypercall infrastructure which receives
the guest calls - no specific hcall function is implemented in this patch.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
---

[diffstat]
 arch/powerpc/kvm/emulate.c     |   27 +++++++++++++++++++++++++++
 include/asm-powerpc/kvm_para.h |    2 ++
 2 files changed, 29 insertions(+)

[diff]
diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c
--- a/arch/powerpc/kvm/emulate.c
+++ b/arch/powerpc/kvm/emulate.c
@@ -203,6 +203,24 @@
 	kvmppc_set_msr(vcpu, vcpu->arch.srr1);
 }
 
+static int kvmppc_do_hypercall(struct kvm_vcpu *vcpu)
+{
+	int ret = 0;
+
+	switch (vcpu->arch.gpr[0]) {
+	default:
+		printk(KERN_ERR"unknown hypercall %d\n", vcpu->arch.gpr[0]);
+		kvmppc_dump_vcpu(vcpu);
+		ret = -ENOSYS;
+	}
+
+	vcpu->arch.gpr[11] = ret;
+	vcpu->arch.pc += 4; /* Advance past hypercall instruction. */
+
+	return ret;
+}
+
+
 /* XXX to do:
  * lhax
  * lhaux
@@ -232,6 +250,15 @@
 	int advance = 1;
 
 	switch (get_op(inst)) {
+	case 0:
+		if (inst == KVM_HYPERCALL_BIN) {
+			kvmppc_do_hypercall(vcpu);
+			advance = 0; /* kvmppc_do_hypercall handles the PC. */
+		} else {
+			printk(KERN_ERR"unknown op %d\n", get_op(inst));
+			emulated = EMULATE_FAIL;
+		}
+		break;
 	case 3:                                                 /* trap */
 		printk("trap!\n");
 		kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_PROGRAM);
diff --git a/include/asm-powerpc/kvm_para.h b/include/asm-powerpc/kvm_para.h
--- a/include/asm-powerpc/kvm_para.h
+++ b/include/asm-powerpc/kvm_para.h
@@ -22,6 +22,8 @@
 
 #ifdef __KERNEL__
 
+#define KVM_HYPERCALL_BIN 0x03ffffff
+
 static inline int kvm_para_available(void)
 {
 	return 0;

  parent reply	other threads:[~2008-07-23  8:38 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-07-23  8:36 [PATCH 0/6][RFC] kvmppc: paravirtualization interface ehrhardt
2008-07-23  8:36 ` [PATCH 1/6] kvmppc: read device tree hypervisor node infrastructure ehrhardt
2008-07-24  1:41   ` Tony Breeds
2008-07-24  7:44     ` Christian Ehrhardt
2008-07-23  8:36 ` ehrhardt [this message]
2008-07-24  1:43   ` [PATCH 2/6] kvmppc: add hypercall infrastructure - host part Tony Breeds
2008-07-30 13:41     ` Geert Uytterhoeven
2008-07-23  8:36 ` [PATCH 3/6] kvmppc: add hypercall infrastructure - guest part ehrhardt
2008-07-24  1:45   ` Tony Breeds
2008-07-24  7:56     ` Christian Ehrhardt
2008-07-23  8:36 ` [PATCH 4/6] kvmppc: magic page hypercall - host part ehrhardt
2008-07-24  1:49   ` Tony Breeds
2008-07-23  8:36 ` [PATCH 5/6] kvmppc: magic page paravirtualization - guest part ehrhardt
2008-07-24  1:59   ` Tony Breeds
2008-07-23  8:36 ` [PATCH 6/6] kvmppc: kvm-userspace: device tree modification for magicpage ehrhardt
2008-07-24  2:01 ` [PATCH 0/6][RFC] kvmppc: paravirtualization interface Tony Breeds
2008-07-24  8:17   ` Christian Ehrhardt
2008-07-25  1:08     ` Tony Breeds

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