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 3/6] kvmppc: add hypercall infrastructure - guest part
Date: Wed, 23 Jul 2008 10:36:44 +0200 [thread overview]
Message-ID: <1216802207-32675-4-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 guest portion of the hypercall infrastructure, basically an
illegal instruction with a defined layout.
See http://kvm.qumranet.com/kvmwiki/PowerPC_Hypercall_ABI for more detail
on the hypercall ABI for powerpc.
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
---
[diffstat]
kvm_para.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
[diff]
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
@@ -25,6 +25,8 @@
#ifdef __KERNEL__
#include <linux/of.h>
+
+#define KVM_HYPERCALL_BIN 0x03ffffff
static struct kvmppc_para_features {
char *dtcell;
@@ -63,6 +65,20 @@
void kvm_guest_init(void);
+static inline long kvm_hypercall1(unsigned int nr, unsigned long p1)
+{
+ register unsigned long hcall asm ("r0") = nr;
+ register unsigned long arg1 asm ("r3") = p1;
+ register long ret asm ("r11");
+
+ asm volatile(".long %1"
+ : "=r"(ret)
+ : "i"(KVM_HYPERCALL_BIN), "r"(hcall), "r"(arg1)
+ : "r4", "r5", "r6", "r7", "r8",
+ "r9", "r10", "r12", "cc");
+ return ret;
+}
+
#endif /* __KERNEL__ */
#endif /* __POWERPC_KVM_PARA_H__ */
next prev parent reply other threads:[~2008-07-23 8:37 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 ` [PATCH 2/6] kvmppc: add hypercall infrastructure - host part ehrhardt
2008-07-24 1:43 ` Tony Breeds
2008-07-30 13:41 ` Geert Uytterhoeven
2008-07-23 8:36 ` ehrhardt [this message]
2008-07-24 1:45 ` [PATCH 3/6] kvmppc: add hypercall infrastructure - guest part 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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