kvm_read_sregs(): Read the TR segment register

Link: https://lore.kernel.org/ltp/[email protected]/
Acked-by: Petr Vorel <[email protected]>
Signed-off-by: Martin Doucha <[email protected]>

Author: mdoucha

testcases/kernel/kvm/bootstrap_x86.S

@@ -215,6 +215,8 @@ kvm_read_sregs:
 	movw %ax, 8(%edi)
 	mov %ss, %ax
 	movw %ax, 10(%edi)
+	str %ax
+	movw %ax, 12(%edi)
 	pop %edi
 	ret
 

testcases/kernel/kvm/bootstrap_x86_64.S

@@ -319,6 +319,8 @@ kvm_read_sregs:
 	movw %ax, 8(%rdi)
 	mov %ss, %ax
 	movw %ax, 10(%rdi)
+	str %ax
+	movw %ax, 12(%rdi)
 	retq
 
 handle_interrupt:

testcases/kernel/kvm/include/kvm_x86.h

@@ -178,7 +178,7 @@ struct kvm_cregs {
 };
 
 struct kvm_sregs {
-	uint16_t cs, ds, es, fs, gs, ss;
+	uint16_t cs, ds, es, fs, gs, ss, tr;
 };
 
 struct kvm_regs64 {