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31 lines
956 B
Diff
31 lines
956 B
Diff
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Thu, 12 Aug 2021 11:52:42 +0200
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Subject: [PATCH] arm64: don't issue HVC on boot
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Broadcom's CFE loader seems to miss setting SCR_EL3.HCE which results in
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generating an UNDEF and kernel panic on the first HVC.
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HVC gets issued by kernels 5.12+ while booting, by kexec and KVM. Until
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someone finds a workaround we have to avoid all above.
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Workarounds: 0c93df9622d4 ("arm64: Initialise as nVHE before switching to VHE")
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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---
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arch/arm64/kernel/hyp-stub.S | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/arch/arm64/kernel/hyp-stub.S
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+++ b/arch/arm64/kernel/hyp-stub.S
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@@ -238,7 +238,7 @@ SYM_FUNC_START(switch_to_vhe)
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// Turn the world upside down
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mov x0, #HVC_VHE_RESTART
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- hvc #0
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+// hvc #0
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1:
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ret
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SYM_FUNC_END(switch_to_vhe)
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