KVM: s390: streamline memslot handling
This patch relocates the variables kvm-s390 uses to track guest mem addr/size.
As discussed dropping the variables at struct kvm_arch level allows to use the
common vcpu->request based mechanism to reload guest memory if e.g. changes
via set_memory_region.
The kick mechanism introduced in this series is used to ensure running vcpus
leave guest state to catch the update.
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/s390/kvm/gaccess.h b/arch/s390/kvm/gaccess.h
index ed60f3a..03c716a 100644
--- a/arch/s390/kvm/gaccess.h
+++ b/arch/s390/kvm/gaccess.h
@@ -1,7 +1,7 @@
/*
* gaccess.h - access guest memory
*
- * Copyright IBM Corp. 2008
+ * Copyright IBM Corp. 2008,2009
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
@@ -16,13 +16,14 @@
#include <linux/compiler.h>
#include <linux/kvm_host.h>
#include <asm/uaccess.h>
+#include "kvm-s390.h"
static inline void __user *__guestaddr_to_user(struct kvm_vcpu *vcpu,
unsigned long guestaddr)
{
unsigned long prefix = vcpu->arch.sie_block->prefix;
- unsigned long origin = vcpu->kvm->arch.guest_origin;
- unsigned long memsize = vcpu->kvm->arch.guest_memsize;
+ unsigned long origin = vcpu->arch.sie_block->gmsor;
+ unsigned long memsize = kvm_s390_vcpu_get_memsize(vcpu);
if (guestaddr < 2 * PAGE_SIZE)
guestaddr += prefix;
@@ -158,8 +159,8 @@
const void *from, unsigned long n)
{
unsigned long prefix = vcpu->arch.sie_block->prefix;
- unsigned long origin = vcpu->kvm->arch.guest_origin;
- unsigned long memsize = vcpu->kvm->arch.guest_memsize;
+ unsigned long origin = vcpu->arch.sie_block->gmsor;
+ unsigned long memsize = kvm_s390_vcpu_get_memsize(vcpu);
if ((guestdest < 2 * PAGE_SIZE) && (guestdest + n > 2 * PAGE_SIZE))
goto slowpath;
@@ -209,8 +210,8 @@
unsigned long guestsrc, unsigned long n)
{
unsigned long prefix = vcpu->arch.sie_block->prefix;
- unsigned long origin = vcpu->kvm->arch.guest_origin;
- unsigned long memsize = vcpu->kvm->arch.guest_memsize;
+ unsigned long origin = vcpu->arch.sie_block->gmsor;
+ unsigned long memsize = kvm_s390_vcpu_get_memsize(vcpu);
if ((guestsrc < 2 * PAGE_SIZE) && (guestsrc + n > 2 * PAGE_SIZE))
goto slowpath;
@@ -244,8 +245,8 @@
unsigned long guestdest,
const void *from, unsigned long n)
{
- unsigned long origin = vcpu->kvm->arch.guest_origin;
- unsigned long memsize = vcpu->kvm->arch.guest_memsize;
+ unsigned long origin = vcpu->arch.sie_block->gmsor;
+ unsigned long memsize = kvm_s390_vcpu_get_memsize(vcpu);
if (guestdest + n > memsize)
return -EFAULT;
@@ -262,8 +263,8 @@
unsigned long guestsrc,
unsigned long n)
{
- unsigned long origin = vcpu->kvm->arch.guest_origin;
- unsigned long memsize = vcpu->kvm->arch.guest_memsize;
+ unsigned long origin = vcpu->arch.sie_block->gmsor;
+ unsigned long memsize = kvm_s390_vcpu_get_memsize(vcpu);
if (guestsrc + n > memsize)
return -EFAULT;