[kvm-unit-tests PATCH 1/3] x86: realmode: initialize idtr

[Nadav Amit <namit@vmware.com>]

The realmode test does not initialize the IDTR, assuming that its base
is zero and its limit 0x3ff. Initialize it, as the BIOS might not set it
as such.

Signed-off-by: Nadav Amit <namit@vmware.com>
---
 x86/realmode.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/x86/realmode.c b/x86/realmode.c
index 234d607..ef79f7e 100644
--- a/x86/realmode.c
+++ b/x86/realmode.c
@@ -1799,6 +1799,7 @@ void realmode_start(void)
 unsigned long long r_gdt[] = { 0, 0x9b000000ffff, 0x93000000ffff };
 
 struct table_descr r_gdt_descr = { sizeof(r_gdt) - 1, &r_gdt };
+struct table_descr r_idt_descr = { 0x3ff, 0 };
 
 asm(
 	".section .init \n\t"
@@ -1819,6 +1820,7 @@ asm(
 	".text \n\t"
 	"start: \n\t"
 	"lgdt r_gdt_descr \n\t"
+	"lidt r_idt_descr \n\t"
 	"ljmp $8, $1f; 1: \n\t"
 	".code16gcc \n\t"
 	"mov $16, %eax \n\t"
-- 
2.20.1