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cpu: Parse the CPU flags to detect the CET status

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New enough hardware to have this feature isn't going to be in the marketplace
for a while. To use that newer hardware requires a very recent kernel (5.6 at
least, although it will probably be at least 5.9 by the time the hardware is
released).

The CET status will be used in future functionality.
This commit is contained in:
Richard Hughes 2020-05-06 17:32:52 +01:00
parent 0cd2f10711
commit 2d6456e019
2 changed files with 45 additions and 1 deletions
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44
plugins/cpu/fu-cpu-device.c
View File

@ -10,13 +10,49 @@
struct _FuCpuDevice {
FuDevice parent_instance;
gboolean has_shstk;
gboolean has_ibt;
};
G_DEFINE_TYPE (FuCpuDevice, fu_cpu_device, FU_TYPE_DEVICE)
static void fu_cpu_device_parse_section (FuDevice *dev, const gchar *data)
gboolean
fu_cpu_device_has_shstk (FuCpuDevice *self)
{
return self->has_shstk;
}
gboolean
fu_cpu_device_has_ibt (FuCpuDevice *self)
{
return self->has_ibt;
}
static void
fu_cpu_device_to_string (FuDevice *device, guint idt, GString *str)
{
FuCpuDevice *self = FU_CPU_DEVICE (device);
fu_common_string_append_kb (str, idt, "HasSHSTK", self->has_shstk);
fu_common_string_append_kb (str, idt, "HasIBT", self->has_ibt);
}
static void
fu_cpu_device_parse_flags (FuCpuDevice *self, const gchar *data)
{
g_auto(GStrv) flags = g_strsplit (data, " ", -1);
for (guint i = 0; flags[i] != NULL; i++) {
if (g_strcmp0 (flags[i], "shstk") == 0)
self->has_shstk = TRUE;
if (g_strcmp0 (flags[i], "ibt") == 0)
self->has_ibt = TRUE;
}
}
static void
fu_cpu_device_parse_section (FuDevice *dev, const gchar *data)
{
g_auto(GStrv) lines = NULL;
FuCpuDevice *self = FU_CPU_DEVICE (dev);
lines = g_strsplit (data, "\n", 0);
for (guint i = 0; lines[i] != NULL; i++) {
@ -38,6 +74,10 @@ static void fu_cpu_device_parse_section (FuDevice *dev, const gchar *data)
g_autofree gchar *tmp = g_strdup_printf ("cpu:%s", g_strchug (fields[1]));
fu_device_set_physical_id (dev, tmp);
}
} else if (g_str_has_prefix (lines[i], "flags")) {
g_auto(GStrv) fields = g_strsplit (lines[i], ":", -1);
if (fields[1] != NULL)
fu_cpu_device_parse_flags (self, fields[1]);
}
}
}
@ -54,6 +94,8 @@ fu_cpu_device_init (FuCpuDevice *self)
static void
fu_cpu_device_class_init (FuCpuDeviceClass *klass)
{
FuDeviceClass *klass_device = FU_DEVICE_CLASS (klass);
klass_device->to_string = fu_cpu_device_to_string;
}
FuCpuDevice *

2
plugins/cpu/fu-cpu-device.h
View File

@ -12,3 +12,5 @@
G_DECLARE_FINAL_TYPE (FuCpuDevice, fu_cpu_device, FU, CPU_DEVICE, FuDevice)
FuCpuDevice *fu_cpu_device_new (const gchar *section);
gboolean fu_cpu_device_has_shstk (FuCpuDevice *self);
gboolean fu_cpu_device_has_ibt (FuCpuDevice *self);