Re: [PATCH v6 14/64] KVM: arm64: nv: Handle SPSR_EL2 specially
From: "Russell King (Oracle)" <linux@armlinux.org.uk>
Date: 2022-02-01 16:44:23
Also in:
kvm, kvmarm
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 <redacted> Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Russell King (Oracle) <redacted> -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel