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- From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <[email protected]>
- Date: Thu, 12 Aug 2021 11:52:42 +0200
- Subject: [PATCH] arm64: don't issue HVC on boot
- MIME-Version: 1.0
- Content-Type: text/plain; charset=UTF-8
- Content-Transfer-Encoding: 8bit
- Broadcom's CFE loader seems to miss setting SCR_EL3.HCE which results in
- generating an UNDEF and kernel panic on the first HVC.
- HVC gets issued by kernels 5.12+ while booting, by kexec and KVM. Until
- someone finds a workaround we have to avoid all above.
- Workarounds: 0c93df9622d4 ("arm64: Initialise as nVHE before switching to VHE")
- Signed-off-by: Rafał Miłecki <[email protected]>
- ---
- arch/arm64/kernel/hyp-stub.S | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
- --- a/arch/arm64/kernel/hyp-stub.S
- +++ b/arch/arm64/kernel/hyp-stub.S
- @@ -252,7 +252,7 @@ SYM_FUNC_START(finalise_el2)
- b.ne 1f
-
- mov x0, #HVC_FINALISE_EL2
- - hvc #0
- +// hvc #0
- 1:
- ret
- SYM_FUNC_END(finalise_el2)
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