Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752041AbdF2Xan (ORCPT ); Thu, 29 Jun 2017 19:30:43 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35588 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751827AbdF2Xal (ORCPT ); Thu, 29 Jun 2017 19:30:41 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com AC04CED187 Authentication-Results: ext-mx10.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx10.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=bsd@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com AC04CED187 From: Bandan Das To: kvm@vger.kernel.org Cc: pbonzini@redhat.com, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] KVM: nVMX: Advertise VMFUNC to L1 hypervisor Date: Thu, 29 Jun 2017 19:29:56 -0400 Message-Id: <20170629232956.12300-3-bsd@redhat.com> In-Reply-To: <20170629232956.12300-1-bsd@redhat.com> References: <20170629232956.12300-1-bsd@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Thu, 29 Jun 2017 23:30:34 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3376 Lines: 89 Advertise VMFUNC and EPTP switching function to the L1 hypervisor. Change nested_vmx_exit_handled() to return false for VMFUNC so L0 can handle it. Signed-off-by: Bandan Das --- arch/x86/include/asm/vmx.h | 4 ++++ arch/x86/kvm/vmx.c | 18 ++++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h index e06783e..5f63a2e 100644 --- a/arch/x86/include/asm/vmx.h +++ b/arch/x86/include/asm/vmx.h @@ -192,6 +192,8 @@ enum vmcs_field { APIC_ACCESS_ADDR_HIGH = 0x00002015, POSTED_INTR_DESC_ADDR = 0x00002016, POSTED_INTR_DESC_ADDR_HIGH = 0x00002017, + VM_FUNCTION_CONTROL = 0x00002018, + VM_FUNCTION_CONTROL_HIGH = 0x00002019, EPT_POINTER = 0x0000201a, EPT_POINTER_HIGH = 0x0000201b, EOI_EXIT_BITMAP0 = 0x0000201c, @@ -202,6 +204,8 @@ enum vmcs_field { EOI_EXIT_BITMAP2_HIGH = 0x00002021, EOI_EXIT_BITMAP3 = 0x00002022, EOI_EXIT_BITMAP3_HIGH = 0x00002023, + EPTP_LIST_ADDRESS = 0x00002024, + EPTP_LIST_ADDRESS_HIGH = 0x00002025, VMREAD_BITMAP = 0x00002026, VMWRITE_BITMAP = 0x00002028, XSS_EXIT_BITMAP = 0x0000202C, diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 75049c0..bf06bef 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -767,11 +767,13 @@ static const unsigned short vmcs_field_to_offset_table[] = { FIELD64(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr), FIELD64(APIC_ACCESS_ADDR, apic_access_addr), FIELD64(POSTED_INTR_DESC_ADDR, posted_intr_desc_addr), + FIELD64(VM_FUNCTION_CONTROL, vm_function_control), FIELD64(EPT_POINTER, ept_pointer), FIELD64(EOI_EXIT_BITMAP0, eoi_exit_bitmap0), FIELD64(EOI_EXIT_BITMAP1, eoi_exit_bitmap1), FIELD64(EOI_EXIT_BITMAP2, eoi_exit_bitmap2), FIELD64(EOI_EXIT_BITMAP3, eoi_exit_bitmap3), + FIELD64(EPTP_LIST_ADDRESS, eptp_list_address), FIELD64(XSS_EXIT_BITMAP, xss_exit_bitmap), FIELD64(GUEST_PHYSICAL_ADDRESS, guest_physical_address), FIELD64(VMCS_LINK_POINTER, vmcs_link_pointer), @@ -2806,6 +2808,13 @@ static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx) } else vmx->nested.nested_vmx_ept_caps = 0; + if (cpu_has_vmx_vmfunc()) { + vmx->nested.nested_vmx_secondary_ctls_high |= + SECONDARY_EXEC_ENABLE_VMFUNC; + vmx->nested.nested_vmx_vmfunc_controls = + vmx_vmfunc_controls() & 1; + } + /* * Old versions of KVM use the single-context version without * checking for support, so declare that it is supported even @@ -8215,6 +8224,8 @@ static bool nested_vmx_exit_handled(struct kvm_vcpu *vcpu) case EXIT_REASON_PML_FULL: /* We emulate PML support to L1. */ return false; + case EXIT_REASON_VMFUNC: + return false; default: return true; } @@ -10309,6 +10320,13 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, vmx_flush_tlb_ept_only(vcpu); } + if (nested_cpu_has_eptp_switching(vmcs12)) { + vmcs_write64(VM_FUNCTION_CONTROL, + vmcs12->vm_function_control & 1); + vmcs_write64(EPTP_LIST_ADDRESS, + page_to_phys(vmx->nested.shadow_eptp_list)); + } + /* * This sets GUEST_CR0 to vmcs12->guest_cr0, possibly modifying those * bits which we consider mandatory enabled. -- 2.9.4