# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID e38c8c6429eadb7cac129c949e6203d1008cc470
# Parent d316d7faf64e7240c748acb598eb0cf83d86c536
[HVM][AMD] Support HVM SMP guests on AMD Pacifica hardware (svm platform).
Signed-off-by: K. Y. Srinivasan <ksrinivasan@xxxxxxxxxx>
xen-unstable changeset: 10180:e0ec3587a2f03d14e55862311f0a0be9f833d6c0
xen-unstable date: Tue May 30 12:32:07 2006 +0100
---
xen/arch/x86/hvm/svm/svm.c | 54 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 54 insertions(+)
diff -r d316d7faf64e -r e38c8c6429ea xen/arch/x86/hvm/svm/svm.c
--- a/xen/arch/x86/hvm/svm/svm.c Wed May 31 07:32:55 2006 +0100
+++ b/xen/arch/x86/hvm/svm/svm.c Wed May 31 07:33:28 2006 +0100
@@ -74,6 +74,9 @@ void svm_dump_regs(const char *from, str
void svm_dump_regs(const char *from, struct cpu_user_regs *regs);
static void svm_relinquish_guest_resources(struct domain *d);
+static int svm_do_vmmcall_reset_to_realmode(struct vcpu *v,
+ struct cpu_user_regs *regs);
+
extern void set_hsa_to_guest( struct arch_svm_struct *arch_svm );
@@ -438,6 +441,42 @@ unsigned long svm_get_ctrl_reg(struct vc
return 0; /* dummy */
}
+
+/* SVM-specific intitialization code for VCPU application processors */
+void svm_init_ap_context(struct vcpu_guest_context *ctxt,
+ int vcpuid, int trampoline_vector)
+{
+ int i;
+ struct vcpu *v, *bsp = current;
+ struct domain *d = bsp->domain;
+ cpu_user_regs_t *regs;;
+
+
+ if ((v = d->vcpu[vcpuid]) == NULL)
+ {
+ printk("vcpuid %d is invalid! good-bye.\n", vcpuid);
+ domain_crash_synchronous();
+ }
+ regs = &v->arch.guest_context.user_regs;
+
+ memset(ctxt, 0, sizeof(*ctxt));
+ for (i = 0; i < 256; ++i)
+ {
+ ctxt->trap_ctxt[i].vector = i;
+ ctxt->trap_ctxt[i].cs = FLAT_KERNEL_CS;
+ }
+
+
+ /*
+ * We execute the trampoline code in real mode. The trampoline vector
+ * passed to us is page alligned and is the physicall frame number for
+ * the code. We will execute this code in real mode.
+ */
+ ctxt->user_regs.eip = 0x0;
+ ctxt->user_regs.cs = (trampoline_vector << 8);
+ ctxt->flags = VGCF_HVM_GUEST;
+}
+
int start_svm(void)
{
u32 eax, ecx, edx;
@@ -484,6 +523,7 @@ int start_svm(void)
hvm_funcs.paging_enabled = svm_paging_enabled;
hvm_funcs.instruction_length = svm_instruction_length;
hvm_funcs.get_guest_ctrl_reg = svm_get_ctrl_reg;
+ hvm_funcs.init_ap_context = svm_init_ap_context;
hvm_enabled = 1;
@@ -660,6 +700,20 @@ static void arch_svm_do_launch(struct vc
if (svm_dbg_on)
svm_dump_host_regs(__func__);
#endif
+ if (v->vcpu_id != 0)
+ {
+ u16 cs_sel = regs->cs;
+ /*
+ * This is the launch of an AP; set state so that we begin executing
+ * the trampoline code in real-mode.
+ */
+ svm_do_vmmcall_reset_to_realmode(v, regs);
+ /* Adjust the state to execute the trampoline code.*/
+ v->arch.hvm_svm.vmcb->rip = 0;
+ v->arch.hvm_svm.vmcb->cs.sel= cs_sel;
+ v->arch.hvm_svm.vmcb->cs.base = (cs_sel << 4);
+ }
+
reset_stack_and_jump(svm_asm_do_launch);
}
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