x86/hvm: introduce hvm_save_cpu_ctxt_one()

This is used to save data from a single instance.

Signed-off-by: Alexandru Isaila <aisaila@bitdefender.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index c99387f704fd60dfdf6c1dcc3ce059fb95810910..056c6cd7f1adf2b10840a3f915c10e9ad4bf28c8 100644 (file)
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -778,119 +778,126 @@ static int hvm_load_tsc_adjust(struct domain *d, hvm_domain_context_t *h)
 HVM_REGISTER_SAVE_RESTORE(TSC_ADJUST, hvm_save_tsc_adjust,
                           hvm_load_tsc_adjust, 1, HVMSR_PER_VCPU);
 
+static int hvm_save_cpu_ctxt_one(struct vcpu *v, hvm_domain_context_t *h)
+{
+    struct segment_register seg;
+    struct hvm_hw_cpu ctxt = {
+        .tsc = hvm_get_guest_tsc_fixed(v, v->domain->arch.hvm.sync_tsc),
+        .msr_tsc_aux = hvm_msr_tsc_aux(v),
+        .rax = v->arch.user_regs.rax,
+        .rbx = v->arch.user_regs.rbx,
+        .rcx = v->arch.user_regs.rcx,
+        .rdx = v->arch.user_regs.rdx,
+        .rbp = v->arch.user_regs.rbp,
+        .rsi = v->arch.user_regs.rsi,
+        .rdi = v->arch.user_regs.rdi,
+        .rsp = v->arch.user_regs.rsp,
+        .rip = v->arch.user_regs.rip,
+        .rflags = v->arch.user_regs.rflags,
+        .r8  = v->arch.user_regs.r8,
+        .r9  = v->arch.user_regs.r9,
+        .r10 = v->arch.user_regs.r10,
+        .r11 = v->arch.user_regs.r11,
+        .r12 = v->arch.user_regs.r12,
+        .r13 = v->arch.user_regs.r13,
+        .r14 = v->arch.user_regs.r14,
+        .r15 = v->arch.user_regs.r15,
+        .dr0 = v->arch.debugreg[0],
+        .dr1 = v->arch.debugreg[1],
+        .dr2 = v->arch.debugreg[2],
+        .dr3 = v->arch.debugreg[3],
+        .dr6 = v->arch.debugreg[6],
+        .dr7 = v->arch.debugreg[7],
+    };
+
+    /*
+     * We don't need to save state for a vcpu that is down; the restore
+     * code will leave it down if there is nothing saved.
+     */
+    if ( v->pause_flags & VPF_down )
+        return 0;
+
+    /* Architecture-specific vmcs/vmcb bits */
+    hvm_funcs.save_cpu_ctxt(v, &ctxt);
+
+    hvm_get_segment_register(v, x86_seg_idtr, &seg);
+    ctxt.idtr_limit = seg.limit;
+    ctxt.idtr_base = seg.base;
+
+    hvm_get_segment_register(v, x86_seg_gdtr, &seg);
+    ctxt.gdtr_limit = seg.limit;
+    ctxt.gdtr_base = seg.base;
+
+    hvm_get_segment_register(v, x86_seg_cs, &seg);
+    ctxt.cs_sel = seg.sel;
+    ctxt.cs_limit = seg.limit;
+    ctxt.cs_base = seg.base;
+    ctxt.cs_arbytes = seg.attr;
+
+    hvm_get_segment_register(v, x86_seg_ds, &seg);
+    ctxt.ds_sel = seg.sel;
+    ctxt.ds_limit = seg.limit;
+    ctxt.ds_base = seg.base;
+    ctxt.ds_arbytes = seg.attr;
+
+    hvm_get_segment_register(v, x86_seg_es, &seg);
+    ctxt.es_sel = seg.sel;
+    ctxt.es_limit = seg.limit;
+    ctxt.es_base = seg.base;
+    ctxt.es_arbytes = seg.attr;
+
+    hvm_get_segment_register(v, x86_seg_ss, &seg);
+    ctxt.ss_sel = seg.sel;
+    ctxt.ss_limit = seg.limit;
+    ctxt.ss_base = seg.base;
+    ctxt.ss_arbytes = seg.attr;
+
+    hvm_get_segment_register(v, x86_seg_fs, &seg);
+    ctxt.fs_sel = seg.sel;
+    ctxt.fs_limit = seg.limit;
+    ctxt.fs_base = seg.base;
+    ctxt.fs_arbytes = seg.attr;
+
+    hvm_get_segment_register(v, x86_seg_gs, &seg);
+    ctxt.gs_sel = seg.sel;
+    ctxt.gs_limit = seg.limit;
+    ctxt.gs_base = seg.base;
+    ctxt.gs_arbytes = seg.attr;
+
+    hvm_get_segment_register(v, x86_seg_tr, &seg);
+    ctxt.tr_sel = seg.sel;
+    ctxt.tr_limit = seg.limit;
+    ctxt.tr_base = seg.base;
+    ctxt.tr_arbytes = seg.attr;
+
+    hvm_get_segment_register(v, x86_seg_ldtr, &seg);
+    ctxt.ldtr_sel = seg.sel;
+    ctxt.ldtr_limit = seg.limit;
+    ctxt.ldtr_base = seg.base;
+    ctxt.ldtr_arbytes = seg.attr;
+
+    if ( v->fpu_initialised )
+    {
+        memcpy(ctxt.fpu_regs, v->arch.fpu_ctxt, sizeof(ctxt.fpu_regs));
+        ctxt.flags = XEN_X86_FPU_INITIALISED;
+    }
+
+    return hvm_save_entry(CPU, v->vcpu_id, h, &ctxt);
+}
+
 static int hvm_save_cpu_ctxt(struct domain *d, hvm_domain_context_t *h)
 {
     struct vcpu *v;
-    struct hvm_hw_cpu ctxt;
-    struct segment_register seg;
+    int err = 0;
 
     for_each_vcpu ( d, v )
     {
-        /* We don't need to save state for a vcpu that is down; the restore 
-         * code will leave it down if there is nothing saved. */
-        if ( v->pause_flags & VPF_down )
-            continue;
-
-        memset(&ctxt, 0, sizeof(ctxt));
-
-        /* Architecture-specific vmcs/vmcb bits */
-        hvm_funcs.save_cpu_ctxt(v, &ctxt);
-
-        ctxt.tsc = hvm_get_guest_tsc_fixed(v, d->arch.hvm.sync_tsc);
-
-        ctxt.msr_tsc_aux = hvm_msr_tsc_aux(v);
-
-        hvm_get_segment_register(v, x86_seg_idtr, &seg);
-        ctxt.idtr_limit = seg.limit;
-        ctxt.idtr_base = seg.base;
-
-        hvm_get_segment_register(v, x86_seg_gdtr, &seg);
-        ctxt.gdtr_limit = seg.limit;
-        ctxt.gdtr_base = seg.base;
-
-        hvm_get_segment_register(v, x86_seg_cs, &seg);
-        ctxt.cs_sel = seg.sel;
-        ctxt.cs_limit = seg.limit;
-        ctxt.cs_base = seg.base;
-        ctxt.cs_arbytes = seg.attr;
-
-        hvm_get_segment_register(v, x86_seg_ds, &seg);
-        ctxt.ds_sel = seg.sel;
-        ctxt.ds_limit = seg.limit;
-        ctxt.ds_base = seg.base;
-        ctxt.ds_arbytes = seg.attr;
-
-        hvm_get_segment_register(v, x86_seg_es, &seg);
-        ctxt.es_sel = seg.sel;
-        ctxt.es_limit = seg.limit;
-        ctxt.es_base = seg.base;
-        ctxt.es_arbytes = seg.attr;
-
-        hvm_get_segment_register(v, x86_seg_ss, &seg);
-        ctxt.ss_sel = seg.sel;
-        ctxt.ss_limit = seg.limit;
-        ctxt.ss_base = seg.base;
-        ctxt.ss_arbytes = seg.attr;
-
-        hvm_get_segment_register(v, x86_seg_fs, &seg);
-        ctxt.fs_sel = seg.sel;
-        ctxt.fs_limit = seg.limit;
-        ctxt.fs_base = seg.base;
-        ctxt.fs_arbytes = seg.attr;
-
-        hvm_get_segment_register(v, x86_seg_gs, &seg);
-        ctxt.gs_sel = seg.sel;
-        ctxt.gs_limit = seg.limit;
-        ctxt.gs_base = seg.base;
-        ctxt.gs_arbytes = seg.attr;
-
-        hvm_get_segment_register(v, x86_seg_tr, &seg);
-        ctxt.tr_sel = seg.sel;
-        ctxt.tr_limit = seg.limit;
-        ctxt.tr_base = seg.base;
-        ctxt.tr_arbytes = seg.attr;
-
-        hvm_get_segment_register(v, x86_seg_ldtr, &seg);
-        ctxt.ldtr_sel = seg.sel;
-        ctxt.ldtr_limit = seg.limit;
-        ctxt.ldtr_base = seg.base;
-        ctxt.ldtr_arbytes = seg.attr;
-
-        if ( v->fpu_initialised )
-        {
-            memcpy(ctxt.fpu_regs, v->arch.fpu_ctxt, sizeof(ctxt.fpu_regs));
-            ctxt.flags = XEN_X86_FPU_INITIALISED;
-        }
-
-        ctxt.rax = v->arch.user_regs.rax;
-        ctxt.rbx = v->arch.user_regs.rbx;
-        ctxt.rcx = v->arch.user_regs.rcx;
-        ctxt.rdx = v->arch.user_regs.rdx;
-        ctxt.rbp = v->arch.user_regs.rbp;
-        ctxt.rsi = v->arch.user_regs.rsi;
-        ctxt.rdi = v->arch.user_regs.rdi;
-        ctxt.rsp = v->arch.user_regs.rsp;
-        ctxt.rip = v->arch.user_regs.rip;
-        ctxt.rflags = v->arch.user_regs.rflags;
-        ctxt.r8  = v->arch.user_regs.r8;
-        ctxt.r9  = v->arch.user_regs.r9;
-        ctxt.r10 = v->arch.user_regs.r10;
-        ctxt.r11 = v->arch.user_regs.r11;
-        ctxt.r12 = v->arch.user_regs.r12;
-        ctxt.r13 = v->arch.user_regs.r13;
-        ctxt.r14 = v->arch.user_regs.r14;
-        ctxt.r15 = v->arch.user_regs.r15;
-        ctxt.dr0 = v->arch.debugreg[0];
-        ctxt.dr1 = v->arch.debugreg[1];
-        ctxt.dr2 = v->arch.debugreg[2];
-        ctxt.dr3 = v->arch.debugreg[3];
-        ctxt.dr6 = v->arch.debugreg[6];
-        ctxt.dr7 = v->arch.debugreg[7];
-
-        if ( hvm_save_entry(CPU, v->vcpu_id, h, &ctxt) != 0 )
-            return 1; 
+        err = hvm_save_cpu_ctxt_one(v, h);
+        if ( err )
+            break;
     }
-    return 0;
+
+    return err;
 }
 
 /* Return a string indicating the error, or NULL for valid. */