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authorJes Sorensen <jes@sgi.com>2008-12-16 16:45:47 +0100
committerAvi Kivity <avi@redhat.com>2008-12-31 16:55:47 +0200
commit042b26edf0bc1b0f03238a71aed71cca4593848c (patch)
treecc80cc9e7e097f53837d0eff67cb5186abcd6a17 /arch
parent4531220b71f0399e71cda0c4cf749e7281a7416a (diff)
downloadlinux-042b26edf0bc1b0f03238a71aed71cca4593848c.tar.bz2
KVM: ia64: Fix kvm_arch_vcpu_ioctl_[gs]et_regs()
Fix kvm_arch_vcpu_ioctl_[gs]et_regs() to do something meaningful on ia64. Old versions could never have worked since they required pointers to be set in the ioctl payload which were never being set by the ioctl handler for get_regs. In addition reserve extra space for future extensions. The change of layout of struct kvm_regs doesn't require adding a new CAP since get/set regs never worked on ia64 until now. This version doesn't support copying the KVM kernel stack in/out of the kernel. This should be implemented in a seperate ioctl call if ever needed. Signed-off-by: Jes Sorensen <jes@sgi.com> Acked-by : Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/include/asm/kvm.h6
-rw-r--r--arch/ia64/kvm/kvm-ia64.c40
2 files changed, 14 insertions, 32 deletions
diff --git a/arch/ia64/include/asm/kvm.h b/arch/ia64/include/asm/kvm.h
index f38472ac2267..68aa6da807c1 100644
--- a/arch/ia64/include/asm/kvm.h
+++ b/arch/ia64/include/asm/kvm.h
@@ -166,8 +166,6 @@ struct saved_vpd {
};
struct kvm_regs {
- char *saved_guest;
- char *saved_stack;
struct saved_vpd vpd;
/*Arch-regs*/
int mp_state;
@@ -200,6 +198,10 @@ struct kvm_regs {
unsigned long fp_psr; /*used for lazy float register */
unsigned long saved_gp;
/*for phycial emulation */
+
+ union context saved_guest;
+
+ unsigned long reserved[64]; /* for future use */
};
struct kvm_sregs {
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index d2eb9691d61d..0f5ebd948437 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -831,9 +831,8 @@ static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
- int i;
struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
- int r;
+ int i;
vcpu_load(vcpu);
@@ -850,18 +849,7 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
vpd->vpr = regs->vpd.vpr;
- r = -EFAULT;
- r = copy_from_user(&vcpu->arch.guest, regs->saved_guest,
- sizeof(union context));
- if (r)
- goto out;
- r = copy_from_user(vcpu + 1, regs->saved_stack +
- sizeof(struct kvm_vcpu),
- KVM_STK_OFFSET - sizeof(struct kvm_vcpu));
- if (r)
- goto out;
- vcpu->arch.exit_data =
- ((struct kvm_vcpu *)(regs->saved_stack))->arch.exit_data;
+ memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
RESTORE_REGS(mp_state);
RESTORE_REGS(vmm_rr);
@@ -895,9 +883,8 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
set_bit(KVM_REQ_RESUME, &vcpu->requests);
vcpu_put(vcpu);
- r = 0;
-out:
- return r;
+
+ return 0;
}
long kvm_arch_vm_ioctl(struct file *filp,
@@ -1378,9 +1365,9 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
- int i;
- int r;
struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
+ int i;
+
vcpu_load(vcpu);
for (i = 0; i < 16; i++) {
@@ -1395,14 +1382,8 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
regs->vpd.vpsr = vpd->vpsr;
regs->vpd.vpr = vpd->vpr;
- r = -EFAULT;
- r = copy_to_user(regs->saved_guest, &vcpu->arch.guest,
- sizeof(union context));
- if (r)
- goto out;
- r = copy_to_user(regs->saved_stack, (void *)vcpu, KVM_STK_OFFSET);
- if (r)
- goto out;
+ memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
+
SAVE_REGS(mp_state);
SAVE_REGS(vmm_rr);
memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
@@ -1430,10 +1411,9 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
SAVE_REGS(metaphysical_saved_rr4);
SAVE_REGS(fp_psr);
SAVE_REGS(saved_gp);
+
vcpu_put(vcpu);
- r = 0;
-out:
- return r;
+ return 0;
}
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)