1 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
2 Date: Thu, 12 Aug 2021 11:52:42 +0200
3 Subject: [PATCH] arm64: don't issue HVC on boot
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8 Broadcom's CFE loader seems to miss setting SCR_EL3.HCE which results in
9 generating an UNDEF and kernel panic on the first HVC.
11 HVC gets issued by kernels 5.12+ while booting, by kexec and KVM. Until
12 someone finds a workaround we have to avoid all above.
14 Workarounds: 0c93df9622d4 ("arm64: Initialise as nVHE before switching to VHE")
15 Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
17 arch/arm64/kernel/hyp-stub.S | 2 +-
18 1 file changed, 1 insertion(+), 1 deletion(-)
20 --- a/arch/arm64/kernel/hyp-stub.S
21 +++ b/arch/arm64/kernel/hyp-stub.S
22 @@ -238,7 +238,7 @@ SYM_FUNC_START(switch_to_vhe)
24 // Turn the world upside down
25 mov x0, #HVC_VHE_RESTART
30 SYM_FUNC_END(switch_to_vhe)