On Fri, Jan 28, 2022 at 12:18:22PM +0000, Marc Zyngier wrote: > SPSR_EL2 needs special attention when running nested on ARMv8.3: > > If taking an exception while running at vEL2 (actually EL1), the > HW will update the SPSR_EL1 register with the EL1 mode. We need > to track this in order to make sure that accesses to the virtual > view of SPSR_EL2 is correct. > > To do so, we place an illegal value in SPSR_EL1.M, and patch it > accordingly if required when accessing it. > > Reviewed-by: Alexandru Elisei <alexandru.elisei@xxxxxxx> > Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx> Reviewed-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx> -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
