On 12/1/19 12:20 PM, Marc Zyngier wrote: > HCR_EL2.TID3 requires that AArch32 reads of MVFR[012] are trapped to > EL2, and HCR_EL2.TID0 does the same for reads of FPSID. > In order to handle this, introduce a new TCG helper function that > checks for these control bits before executing the VMRC instruction. > > Tested with a hacked-up version of KVM/arm64 that sets the control > bits for 32bit guests. > > Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xxxxxxxxxx> > Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx> > --- > target/arm/helper-a64.h | 2 ++ > target/arm/translate-vfp.inc.c | 18 +++++++++++++++--- > target/arm/vfp_helper.c | 29 +++++++++++++++++++++++++++++ > 3 files changed, 46 insertions(+), 3 deletions(-) Reviewed-by: Richard Henderson <richard.henderson@xxxxxxxxxx> Annoying that there's a bug in the manual -- FPSID is listed as group 0 in plenty of places, except in the pseudo-code for Accessing the FPSID which uses TID3. r~ _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
