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KVM: PPC: Use accessor functions for GPR access

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All code in PPC KVM currently accesses gprs in the vcpu struct directly.

While there's nothing wrong with that wrt the current way gprs are stored
and loaded, it doesn't suffice for the PACA acceleration that will follow
in this patchset.

So let's just create little wrapper inline functions that we call whenever
a GPR needs to be read from or written to. The compiled code shouldn't really
change at all for now.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Alexander Graf
2010-01-08 02:58:01 +01:00
committed by Marcelo Tosatti
parent 0d178975d0
commit 8e5b26b55a
11 changed files with 274 additions and 225 deletions
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21
arch/powerpc/kvm/powerpc.c
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@@ -270,34 +270,35 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
struct kvm_run *run)
{
ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
*gpr = run->dcr.data;
kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
}
static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
struct kvm_run *run)
{
ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
ulong gpr;
if (run->mmio.len > sizeof(*gpr)) {
if (run->mmio.len > sizeof(gpr)) {
printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
return;
}
if (vcpu->arch.mmio_is_bigendian) {
switch (run->mmio.len) {
case 4: *gpr = *(u32 *)run->mmio.data; break;
case 2: *gpr = *(u16 *)run->mmio.data; break;
case 1: *gpr = *(u8 *)run->mmio.data; break;
case 4: gpr = *(u32 *)run->mmio.data; break;
case 2: gpr = *(u16 *)run->mmio.data; break;
case 1: gpr = *(u8 *)run->mmio.data; break;
}
} else {
/* Convert BE data from userland back to LE. */
switch (run->mmio.len) {
case 4: *gpr = ld_le32((u32 *)run->mmio.data); break;
case 2: *gpr = ld_le16((u16 *)run->mmio.data); break;
case 1: *gpr = *(u8 *)run->mmio.data; break;
case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
case 1: gpr = *(u8 *)run->mmio.data; break;
}
}
kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
}
int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,