From cff1032555afc9853a490714d7cfa22fdb4c499d Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Thu, 8 Apr 2021 15:10:32 +0200
Subject: Added UMIP

---
 kernel/drivers/cpu.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'kernel/drivers')

diff --git a/kernel/drivers/cpu.c b/kernel/drivers/cpu.c
index f751d33..5d53bef 100644
--- a/kernel/drivers/cpu.c
+++ b/kernel/drivers/cpu.c
@@ -168,6 +168,13 @@ CLEAR void cpu_enable_features(void)
 	} else {
 		print("No SMAP support :(\n");
 	}
+
+	// Enable UMIP // TODO: QEMU support?!
+	if (cpu_extended_features.ecx & CPUID_EXT_FEAT_ECX_UMIP) {
+		cr4_set(cr4_get() | 0x800);
+	} else {
+		print("No UMIP support :(\n");
+	}
 }
 
 void clac(void)
-- 
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