From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from foss.arm.com ([217.140.101.70]:47772 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728283AbeJEPre (ORCPT ); Fri, 5 Oct 2018 11:47:34 -0400 From: Kristina Martsenko Subject: [PATCH v5 02/17] arm64/kvm: consistently handle host HCR_EL2 flags Date: Fri, 5 Oct 2018 09:47:39 +0100 Message-ID: <20181005084754.20950-3-kristina.martsenko@arm.com> In-Reply-To: <20181005084754.20950-1-kristina.martsenko@arm.com> References: <20181005084754.20950-1-kristina.martsenko@arm.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: linux-arm-kernel@lists.infradead.org Cc: Adam Wallis , Amit Kachhap , Andrew Jones , Ard Biesheuvel , Arnd Bergmann , Catalin Marinas , Christoffer Dall , Dave P Martin , Jacob Bramley , Kees Cook , Marc Zyngier , Mark Rutland , Ramana Radhakrishnan , "Suzuki K . Poulose" , Will Deacon , kvmarm@lists.cs.columbia.edu, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Message-ID: <20181005084739.jk4SRLOucxFrBuy_XX_KJUqolPKK1I106gMkmGVMpqk@z> From: Mark Rutland In KVM we define the configuration of HCR_EL2 for a VHE HOST in HCR_HOST_VHE_FLAGS, but we don't have a similar definition for the non-VHE host flags, and open-code HCR_RW. Further, in head.S we open-code the flags for VHE and non-VHE configurations. In future, we're going to want to configure more flags for the host, so lets add a HCR_HOST_NVHE_FLAGS defintion, and consistently use both HCR_HOST_VHE_FLAGS and HCR_HOST_NVHE_FLAGS in the kvm code and head.S. We now use mov_q to generate the HCR_EL2 value, as we use when configuring other registers in head.S. Signed-off-by: Mark Rutland Signed-off-by: Kristina Martsenko Reviewed-by: Christoffer Dall Cc: Catalin Marinas Cc: Marc Zyngier Cc: Will Deacon Cc: kvmarm@lists.cs.columbia.edu --- arch/arm64/include/asm/kvm_arm.h | 1 + arch/arm64/kernel/head.S | 5 ++--- arch/arm64/kvm/hyp/switch.c | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index aa45df752a16..f885f4e96002 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -87,6 +87,7 @@ HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW | HCR_TLOR | \ HCR_FMO | HCR_IMO) #define HCR_VIRT_EXCP_MASK (HCR_VSE | HCR_VI | HCR_VF) +#define HCR_HOST_NVHE_FLAGS (HCR_RW) #define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H) /* TCR_EL2 Registers bits */ diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index b0853069702f..651a06b1980f 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -494,10 +494,9 @@ ENTRY(el2_setup) #endif /* Hyp configuration. */ - mov x0, #HCR_RW // 64-bit EL1 + mov_q x0, HCR_HOST_NVHE_FLAGS cbz x2, set_hcr - orr x0, x0, #HCR_TGE // Enable Host Extensions - orr x0, x0, #HCR_E2H + mov_q x0, HCR_HOST_VHE_FLAGS set_hcr: msr hcr_el2, x0 isb diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index ca46153d7915..a1c32c1f2267 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -157,7 +157,7 @@ static void __hyp_text __deactivate_traps_nvhe(void) mdcr_el2 |= MDCR_EL2_E2PB_MASK << MDCR_EL2_E2PB_SHIFT; write_sysreg(mdcr_el2, mdcr_el2); - write_sysreg(HCR_RW, hcr_el2); + write_sysreg(HCR_HOST_NVHE_FLAGS, hcr_el2); write_sysreg(CPTR_EL2_DEFAULT, cptr_el2); } -- 2.11.0