leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

KVM: arm64: Add a flag to disable MMIO trace for nVHE KVM

Browse Source 
Add a generic flag (__DISABLE_TRACE_MMIO__) to disable MMIO
tracing in nVHE KVM as the tracepoint and MMIO logging symbols
should not be visible at nVHE KVM as there is no way to execute
them. It can also be used to disable MMIO tracing for specific
drivers.

Signed-off-by: Sai Prakash Ranjan <quic_saipraka@quicinc.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Sai Prakash Ranjan 2022-05-18 22:14:15 +05:30 committed by Arnd Bergmann
parent d593d64f04
commit 451f2f1c90
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/arm64/kvm/hyp/nvhe/Makefile
View File

@ -4,7 +4,12 @@
#
asflags-y := -D__KVM_NVHE_HYPERVISOR__ -D__DISABLE_EXPORTS
ccflags-y := -D__KVM_NVHE_HYPERVISOR__ -D__DISABLE_EXPORTS
# Tracepoint and MMIO logging symbols should not be visible at nVHE KVM as
# there is no way to execute them and any such MMIO access from nVHE KVM
# will explode instantly (Words of Marc Zyngier). So introduce a generic flag
# __DISABLE_TRACE_MMIO__ to disable MMIO tracing for nVHE KVM.
ccflags-y := -D__KVM_NVHE_HYPERVISOR__ -D__DISABLE_EXPORTS -D__DISABLE_TRACE_MMIO__
hostprogs := gen-hyprel
HOST_EXTRACFLAGS += -I$(objtree)/include