1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
--- 15.9/common/lib/modules/fglrx/build_mod/firegl_public.c 2015-09-27 10:59:10.121499353 +0200
+++ 15.9b/common/lib/modules/fglrx/build_mod/firegl_public.c 2015-09-27 10:59:31.869133789 +0200
@@ -6446,6 +6446,48 @@
return i;
}
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
+/*
+ * Save processor xstate to xsave area.
+ */
+static void _copy_xregs_to_kernel(struct xregs_state *xstate)
+{
+ u64 mask = -1;
+ u32 lmask = mask;
+ u32 hmask = mask >> 32;
+ int err = 0;
+
+ /*WARN_ON(!alternatives_patched);*/
+
+ /*
+ * If xsaves is enabled, xsaves replaces xsaveopt because
+ * it supports compact format and supervisor states in addition to
+ * modified optimization in xsaveopt.
+ *
+ * Otherwise, if xsaveopt is enabled, xsaveopt replaces xsave
+ * because xsaveopt supports modified optimization which is not
+ * supported by xsave.
+ *
+ * If none of xsaves and xsaveopt is enabled, use xsave.
+ */
+ alternative_input_2(
+ "1:"XSAVE,
+ XSAVEOPT,
+ X86_FEATURE_XSAVEOPT,
+ XSAVES,
+ X86_FEATURE_XSAVES,
+ [xstate] "D" (xstate), "a" (lmask), "d" (hmask) :
+ "memory");
+ asm volatile("2:\n\t"
+ xstate_fault(err)
+ : "0" (err)
+ : "memory");
+
+ /* We should never fault when copying to a kernel buffer: */
+ WARN_ON_FPU(err);
+}
+#endif
+
/** \brief Generate UUID
* \param buf pointer to the generated UUID
* \return None
@@ -6465,7 +6507,7 @@
fpu_xsave(fpu);
if (!(fpu->state->xsave.xsave_hdr.xstate_bv & XSTATE_FP))
#else
- copy_xregs_to_kernel(&fpu->state.xsave);
+ _copy_xregs_to_kernel(&fpu->state.xsave);
if (!(fpu->state.xsave.header.xfeatures & XSTATE_FP))
#endif
return 1;
|