From mboxrd@z Thu Jan 1 00:00:00 1970 From: julien.thierry@arm.com (Julien Thierry) Date: Fri, 20 Oct 2017 12:34:17 +0100 Subject: [RESEND PATCH 2/2] arm/arm64: kvm: Disable branch profiling in HYP code In-Reply-To: <1508499257-10014-1-git-send-email-julien.thierry@arm.com> References: <1508499257-10014-1-git-send-email-julien.thierry@arm.com> Message-ID: <1508499257-10014-3-git-send-email-julien.thierry@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org When HYP code runs into branch profiling code, it attempts to jump to unmapped memory, causing a HYP Panic. Disable the branch profiling for code designed to run at HYP mode. Signed-off-by: Julien Thierry Acked-by: Marc Zyngier Cc: Christoffer Dall Cc: Catalin Marinas Cc: Will Deacon Cc: Russell King Cc: --- arch/arm/kvm/hyp/Makefile | 2 +- arch/arm64/kvm/hyp/Makefile | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/kvm/hyp/Makefile b/arch/arm/kvm/hyp/Makefile index 8679405..92eab1d 100644 --- a/arch/arm/kvm/hyp/Makefile +++ b/arch/arm/kvm/hyp/Makefile @@ -2,7 +2,7 @@ # Makefile for Kernel-based Virtual Machine module, HYP part # -ccflags-y += -fno-stack-protector +ccflags-y += -fno-stack-protector -DDISABLE_BRANCH_PROFILING KVM=../../../../virt/kvm diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile index 14c4e3b..48b0354 100644 --- a/arch/arm64/kvm/hyp/Makefile +++ b/arch/arm64/kvm/hyp/Makefile @@ -2,7 +2,7 @@ # Makefile for Kernel-based Virtual Machine module, HYP part # -ccflags-y += -fno-stack-protector +ccflags-y += -fno-stack-protector -DDISABLE_BRANCH_PROFILING KVM=../../../../virt/kvm -- 1.9.1