Finally we can check whether VHE is disabled on the command line, and not enable it if that's the user's wish. Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx> --- arch/arm64/kernel/hyp-stub.S | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kernel/hyp-stub.S b/arch/arm64/kernel/hyp-stub.S index 232aab84b3cd..fefb37df3e6c 100644 --- a/arch/arm64/kernel/hyp-stub.S +++ b/arch/arm64/kernel/hyp-stub.S @@ -80,13 +80,24 @@ SYM_CODE_END(el1_sync) SYM_CODE_START_LOCAL(mutate_to_vhe) // Sanity check: MMU *must* be off mrs x0, sctlr_el2 - tbnz x0, #0, 1f + tbnz x0, #0, 2f // Needs to be VHE capable, obviously mrs x0, id_aa64mmfr1_el1 ubfx x0, x0, #ID_AA64MMFR1_VHE_SHIFT, #4 - cbz x0, 1f + cbz x0, 2f + // Check whether VHE is disabled from the command line + adr_l x1, id_aa64mmfr1_val + ldr x0, [x1] + adr_l x1, id_aa64mmfr1_mask + ldr x1, [x1] + ubfx x0, x0, #ID_AA64MMFR1_VHE_SHIFT, #4 + ubfx x1, x1, #ID_AA64MMFR1_VHE_SHIFT, #4 + cbz x1, 1f + and x0, x0, x1 + cbz x0, 2f +1: // Engage the VHE magic! mov_q x0, HCR_HOST_VHE_FLAGS msr hcr_el2, x0 @@ -155,7 +166,7 @@ skip_spe: orr x0, x0, x1 msr spsr_el1, x0 -1: eret +2: eret SYM_CODE_END(mutate_to_vhe) .macro invalid_vector label -- 2.29.2 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
