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

[ Upstream commit 9db043d36bd379f4cc99054c079de0dabfc38d03 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/arm/kernel/hyp-stub.S b/arch/arm/kernel/hyp-stub.S
index 60146e3..82a9428 100644 (file)
--- 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