From: Vladimir Murzin <vladimir.murzin@arm.com>
Date: Wed, 20 Feb 2019 14:00:13 +0000 (+0100)
Subject: ARM: 8848/1: virt: Align GIC version check with arm64 counterpart
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9db043d36bd379f4cc99054c079de0dabfc38d03;p=linux.git

ARM: 8848/1: virt: Align GIC version check with arm64 counterpart

arm64 has got relaxation on GIC version check at early boot stage due
to update of the GIC architecture let's align ARM with that.

To help backports (even though the code was correct at the time of writing)
Fixes: e59941b9b381 ("ARM: 8527/1: virt: enable GICv3 system registers")
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---

diff --git a/arch/arm/kernel/hyp-stub.S b/arch/arm/kernel/hyp-stub.S
index 60146e32619a5..82a942894fc04 100644
--- a/arch/arm/kernel/hyp-stub.S
+++ b/arch/arm/kernel/hyp-stub.S
@@ -180,8 +180,8 @@ ARM_BE8(orr	r7, r7, #(1 << 25))     @ HSCTLR.EE
 	@ Check whether GICv3 system registers are available
 	mrc	p15, 0, r7, c0, c1, 1	@ ID_PFR1
 	ubfx	r7, r7, #28, #4
-	cmp	r7, #1
-	bne	2f
+	teq	r7, #0
+	beq	2f
 
 	@ Enable system register accesses
 	mrc	p15, 4, r7, c12, c9, 5	@ ICC_HSRE