25 Nov
2021
25 Nov
'21
3:53 p.m.
On Thu, 25 Nov 2021 15:20:14 +0000, Catalin Marinas wrote:
Having a signed (1 << 31) constant for TCR_EL2_RES1 and CPTR_EL2_TCPAC causes the upper 32-bit to be set to 1 when assigning them to a 64-bit variable. Bit 32 in TCR_EL2 is no longer RES0 in ARMv8.7: with FEAT_LPA2 it changes the meaning of bits 49:48 and 9:8 in the stage 1 EL2 page table entries. As a result of the sign-extension, a non-VHE kernel can no longer boot on a model with ARMv8.7 enabled.
[...]
Applied to fixes, thanks!
[1/1] arm64: KVM: Avoid setting the upper 32 bits of TCR_EL2 and CPTR_EL2 to 1 commit: 1f80d15020d7f130194821feb1432b67648c632d
Cheers,
M.
--
Without deviation from the norm, progress is not possible.