VMX: Add posted interrupt supporting

Add the supporting of using posted interrupt to deliver interrupt.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Jun Nakajima <jun.nakajima@intel.com>
Acked-by: Keir Fraser <keir@xen.org>
Acked-by: George Dunlap <george.dunlap@eu.citrix.com> (from a release perspective)

1 files changed, 15 insertions, 0 deletions

diff --git a/xen/include/asm-x86/hvm/vlapic.h b/xen/include/asm-x86/hvm/vlapic.h
index 101ef57e14..40fd3066e9 100644
--- a/xen/include/asm-x86/hvm/vlapic.h
+++ b/xen/include/asm-x86/hvm/vlapic.h
@@ -54,6 +54,21 @@
 #define vlapic_x2apic_mode(vlapic)                              \
     ((vlapic)->hw.apic_base_msr & MSR_IA32_APICBASE_EXTD)
 
+/*
+ * Generic APIC bitmap vector update & search routines.
+ */
+
+#define VEC_POS(v) ((v) % 32)
+#define REG_POS(v) (((v) / 32) * 0x10)
+#define vlapic_test_and_set_vector(vec, bitmap)                         \
+    test_and_set_bit(VEC_POS(vec), (uint32_t *)((bitmap) + REG_POS(vec)))
+#define vlapic_test_and_clear_vector(vec, bitmap)                       \
+    test_and_clear_bit(VEC_POS(vec), (uint32_t *)((bitmap) + REG_POS(vec)))
+#define vlapic_set_vector(vec, bitmap)                                  \
+    set_bit(VEC_POS(vec), (uint32_t *)((bitmap) + REG_POS(vec)))
+#define vlapic_clear_vector(vec, bitmap)                                \
+    clear_bit(VEC_POS(vec), (uint32_t *)((bitmap) + REG_POS(vec)))
+
 struct vlapic {
     struct hvm_hw_lapic      hw;
     struct hvm_hw_lapic_regs *regs;