Dave Martin 55ffad3b63 KVM: arm64/sve: WARN when avoiding divide-by-zero in sve_reg_to_region() ... sve_reg_to_region() currently passes the result of vcpu_sve_state_size() to array_index_nospec(), effectively leading to a divide / modulo operation. Currently the code bails out and returns -EINVAL if vcpu_sve_state_size() turns out to be zero, in order to avoid going ahead and attempting to divide by zero. This is reasonable, but it should only happen if the kernel contains some other bug that allowed this code to be reached without the vcpu having been properly initialised. To make it clear that this is a defence against bugs rather than something that the user should be able to trigger, this patch marks the check with WARN_ON(). Suggested-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Dave Martin <Dave.Martin@arm.com> Reviewed-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>		2019-04-18 17:14:01 +01:00
..
hyp	KVM: arm64/sve: Context switch the SVE registers	2019-03-29 14:41:53 +00:00
debug.c	arm/arm64: KVM: Introduce kvm_call_hyp_ret()	2019-02-19 21:05:24 +00:00
fpsimd.c	KVM: arm64/sve: Context switch the SVE registers	2019-03-29 14:41:53 +00:00
guest.c	KVM: arm64/sve: WARN when avoiding divide-by-zero in sve_reg_to_region()	2019-04-18 17:14:01 +01:00
handle_exit.c	* ARM: selftests improvements, large PUD support for HugeTLB,	2018-12-26 11:46:28 -08:00
hyp-init.S	arm64: KVM: Enable Common Not Private translations	2018-09-18 12:03:34 +01:00
hyp.S	arm64: KVM: Drop VHE-specific HYP call stub	2019-02-19 21:05:28 +00:00
inject_fault.c
irq.h
Kconfig	treewide: surround Kconfig file paths with double quotes	2018-12-22 00:25:54 +09:00
Makefile	KVM: arm/arm64: Prefix header search paths with $(srctree)/	2019-02-19 21:05:53 +00:00
regmap.c
reset.c	KVM: arm/arm64: Demote kvm_arm_init_arch_resources() to just set up SVE	2019-04-18 17:14:01 +01:00
sys_regs_generic_v8.c
sys_regs.c	KVM: arm64/sve: sys_regs: Demote redundant vcpu_has_sve() checks to WARNs	2019-04-18 17:14:01 +01:00
sys_regs.h	KVM: arm64: Support runtime sysreg visibility filtering	2019-03-29 14:41:53 +00:00
trace.h	arm64: KVM: Add trapped system register access tracepoint	2018-12-19 17:47:08 +00:00
va_layout.c
vgic-sys-reg-v3.c