diff mbox series

[PATCHv2,11/59] x86/mm: Detect MKTME early

Message ID 20190731150813.26289-12-kirill.shutemov@linux.intel.com
State New, archived
Headers show
Series Intel MKTME enabling | expand

Commit Message

Kirill A. Shutemov July 31, 2019, 3:07 p.m. UTC
We need to know the number of KeyIDs before page_ext is initialized.
We are going to use page_ext to store KeyID and it would be handly to
avoid page_ext allocation if there's no MKMTE in the system.

page_ext initialization happens before full CPU initizliation is complete.
Move detect_tme() call to early_init_intel().

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 arch/x86/kernel/cpu/intel.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 991bdcb2a55a..4c2d70287eb4 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -187,6 +187,8 @@  static bool bad_spectre_microcode(struct cpuinfo_x86 *c)
 	return false;
 }
 
+static void detect_tme(struct cpuinfo_x86 *c);
+
 static void early_init_intel(struct cpuinfo_x86 *c)
 {
 	u64 misc_enable;
@@ -338,6 +340,9 @@  static void early_init_intel(struct cpuinfo_x86 *c)
 	 */
 	if (detect_extended_topology_early(c) < 0)
 		detect_ht_early(c);
+
+	if (cpu_has(c, X86_FEATURE_TME))
+		detect_tme(c);
 }
 
 #ifdef CONFIG_X86_32
@@ -793,9 +798,6 @@  static void init_intel(struct cpuinfo_x86 *c)
 	if (cpu_has(c, X86_FEATURE_VMX))
 		detect_vmx_virtcap(c);
 
-	if (cpu_has(c, X86_FEATURE_TME))
-		detect_tme(c);
-
 	init_intel_misc_features(c);
 }