HVM-286 Move code into kvm_cache_regs.[ch]

1 files changed, 93 insertions, 0 deletions

diff --git a/kvm_cache_regs.c b/kvm_cache_regs.c
new file mode 100644
index 0000000..33da1f2
--- /dev/null
+++ b/kvm_cache_regs.c
@@ -0,0 +1,93 @@
+/*
+ * Ported from Linux by Joyent.
+ * Copyright 2011 Joyent, Inc.
+ */
+/*
+ * XXX Need proper header files!
+ */
+#include "msr.h"
+#include "irqflags.h"
+#include "kvm_host.h"
+#include "kvm_x86host.h"
+#include "kvm_iodev.h"
+#include "kvm.h"
+#include "apicdef.h"
+#include "kvm_ioapic.h"
+#include "kvm_lapic.h"
+#include "irq.h"
+#include "kvm_cache_regs.h"
+
+
+unsigned long
+kvm_register_read(struct kvm_vcpu *vcpu, enum kvm_reg reg)
+{
+	if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail))
+		kvm_x86_ops->cache_reg(vcpu, reg);
+
+	return (vcpu->arch.regs[reg]);
+}
+
+void
+kvm_register_write(struct kvm_vcpu *vcpu, enum kvm_reg reg, unsigned long val)
+{
+	vcpu->arch.regs[reg] = val;
+	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
+	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
+}
+
+unsigned long
+kvm_rip_read(struct kvm_vcpu *vcpu)
+{
+	return (kvm_register_read(vcpu, VCPU_REGS_RIP));
+}
+
+void
+kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
+{
+	kvm_register_write(vcpu, VCPU_REGS_RIP, val);
+}
+
+uint64_t
+kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
+{
+	if (!test_bit(VCPU_EXREG_PDPTR,
+	    (unsigned long *)&vcpu->arch.regs_avail)) {
+		kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_PDPTR);
+	}
+
+	return (vcpu->arch.pdptrs[index]);
+}
+
+ulong
+kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
+{
+	ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS;
+
+	if (tmask & vcpu->arch.cr0_guest_owned_bits)
+		kvm_x86_ops->decache_cr0_guest_bits(vcpu);
+
+	return (vcpu->arch.cr0 & mask);
+}
+
+ulong
+kvm_read_cr0(struct kvm_vcpu *vcpu)
+{
+	return (kvm_read_cr0_bits(vcpu, ~0UL));
+}
+
+ulong
+kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
+{
+	uint64_t tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS;
+
+	if (tmask & vcpu->arch.cr4_guest_owned_bits)
+		kvm_x86_ops->decache_cr4_guest_bits(vcpu);
+
+	return (vcpu->arch.cr4 & mask);
+}
+
+ulong
+kvm_read_cr4(struct kvm_vcpu *vcpu)
+{
+	return (kvm_read_cr4_bits(vcpu, ~0UL));
+}