On 5/5/23 12:25, Simon Horman wrote:
On Thu, May 04, 2023 at 02:50:14PM +0000, Ross Philipson wrote:
Introduce the main Secure Launch header file used in the early SL stub
and the early setup code.
Signed-off-by: Ross Philipson <ross.philipson@xxxxxxxxxx>
---
include/linux/slaunch.h | 513 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 513 insertions(+)
create mode 100644 include/linux/slaunch.h
diff --git a/include/linux/slaunch.h b/include/linux/slaunch.h
...
+/* TXTCR_STS status bits */
+#define TXT_SENTER_DONE_STS (1<<0)
+#define TXT_SEXIT_DONE_STS (1<<1)
nit: Please consider using BIT()
Ack
...
+/*
+ * External functions avalailable in mainline kernel.
+ */
+extern void slaunch_setup_txt(void);
+extern u32 slaunch_get_flags(void);
+extern struct sl_ap_wake_info *slaunch_get_ap_wake_info(void);
+extern struct acpi_table_header *slaunch_get_dmar_table(struct acpi_table_header *dmar);
+extern void __noreturn slaunch_txt_reset(void __iomem *txt,
+ const char *msg, u64 error);
+extern void slaunch_finalize(int do_sexit);
I think that extern should be avoided.
Perhaps these are in a header file that can be included?
Someone in an earlier review asked me to add the externs. The function
are not in another header, they are in a C module.
+
+#endif /* !__ASSEMBLY */
+
+#else
+
+#define slaunch_setup_txt() do { } while (0)
+#define slaunch_get_flags() 0
+#define slaunch_get_dmar_table(d) (d)
+#define slaunch_finalize(d) do { } while (0)
I think it is usual to use static functions for this purpose.
Usually they end up in header files as static inline functions.
Yea we can switch to using static functions.
Thanks
Ross
+
+#endif /* !IS_ENABLED(CONFIG_SECURE_LAUNCH) */
+
+#endif /* _LINUX_SLAUNCH_H */
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