From: Catalin Marinas <catalin.marinas@arm.com>
Date: Mon, 4 Jan 2021 12:15:41 +0000 (+0000)
Subject: arm64: kasan: Set TCR_EL1.TBID1 when KASAN_HW_TAGS is enabled
X-Git-Tag: accepted/tizen/unified/20230118.172025~8122^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f34d93f30d6a72f6b15ba24b6994b746df0c30de;p=platform%2Fkernel%2Flinux-rpi.git

arm64: kasan: Set TCR_EL1.TBID1 when KASAN_HW_TAGS is enabled

Commit 49b3cf035edc ("kasan: arm64: set TCR_EL1.TBID1 when enabled") set
the TBID1 bit for the KASAN_SW_TAGS configuration, freeing up 8 bits to
be used by PAC. With in-kernel MTE now in mainline, also set this bit
for the KASAN_HW_TAGS configuration.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Acked-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Andrey Konovalov <andreyknvl@google.com>
---

diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index 37a54b5..1f7ee8c 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -46,7 +46,7 @@
 #endif
 
 #ifdef CONFIG_KASAN_HW_TAGS
-#define TCR_KASAN_HW_FLAGS SYS_TCR_EL1_TCMA1 | TCR_TBI1
+#define TCR_KASAN_HW_FLAGS SYS_TCR_EL1_TCMA1 | TCR_TBI1 | TCR_TBID1
 #else
 #define TCR_KASAN_HW_FLAGS 0
 #endif