From 1c5bc25d9b028fbac0b864d4982e55053d157cf6 Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Mon, 30 Mar 2015 17:44:52 +0100 Subject: [PATCH] xen: arm: Annotate source of ICC SGI register trapping I was unable to find an ARMv8 ARM reference to this, so refer to the GIC Architecture Specification instead. ARMv8 ARM does cover other ways of trapping these accesses via ICH_HCR_EL2 but we don't use those and they trap additional registers as well. Signed-off-by: Ian Campbell Reviewed-by: Julien Grall --- xen/arch/arm/traps.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c index 6eb2331718..47d6cef8a6 100644 --- a/xen/arch/arm/traps.c +++ b/xen/arch/arm/traps.c @@ -2174,6 +2174,12 @@ static void do_sysreg(struct cpu_user_regs *regs, return inject_undef_exception(regs, hsr); break; + /* + * HCR_EL2.FMO or HCR_EL2.IMO + * + * ARMv8: GIC Architecture Specification (PRD03-GENC-010745 24.0) + * Section 4.6.8. + */ case HSR_SYSREG_ICC_SGI1R_EL1: if ( !vgic_emulate(regs, hsr) ) { -- 2.30.2