linux-kernel - [PATCH 5.16 134/227] arm64: Correct wrong label in macro __init_el2

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Date:   Mon, 21 Feb 2022 09:49:13 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Joakim Tjernlund <joakim.tjernlund@...inera.com>,
        Mark Rutland <mark.rutland@....com>,
        Marc Zyngier <maz@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>
Subject: [PATCH 5.16 134/227] arm64: Correct wrong label in macro __init_el2_gicv3

From: Joakim Tjernlund <joakim.tjernlund@...inera.com>

commit 4f6de676d94ee8ddfc2e7e7cd935fc7cb2feff3a upstream.

In commit:

  114945d84a30a5fe ("arm64: Fix labels in el2_setup macros")

We renamed a label from '1' to '.Lskip_gicv3_\@', but failed to update
a branch to it, which now targets a later label also called '1'.

The branch is taken rarely, when GICv3 is present but SRE is disabled
at EL3, causing a boot-time crash.

Update the caller to the new label name.

Fixes: 114945d84a30 ("arm64: Fix labels in el2_setup macros")
Cc: <stable@...r.kernel.org> # 5.12.x
Signed-off-by: Joakim Tjernlund <joakim.tjernlund@...inera.com>
Link: https://lore.kernel.org/r/20220214175643.21931-1-joakim.tjernlund@infinera.com
Reviewed-by: Mark Rutland <mark.rutland@....com>
Reviewed-by: Marc Zyngier <maz@...nel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/arm64/include/asm/el2_setup.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm64/include/asm/el2_setup.h
+++ b/arch/arm64/include/asm/el2_setup.h
@@ -106,7 +106,7 @@
 	msr_s	SYS_ICC_SRE_EL2, x0
 	isb					// Make sure SRE is now set
 	mrs_s	x0, SYS_ICC_SRE_EL2		// Read SRE back,
-	tbz	x0, #0, 1f			// and check that it sticks
+	tbz	x0, #0, .Lskip_gicv3_\@		// and check that it sticks
 	msr_s	SYS_ICH_HCR_EL2, xzr		// Reset ICC_HCR_EL2 to defaults
 .Lskip_gicv3_\@:
 .endm