From patchwork Wed Apr 21 14:06:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vineeth Pillai X-Patchwork-Id: 12216203 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF60EC43462 for ; Wed, 21 Apr 2021 14:07:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A9B2261454 for ; Wed, 21 Apr 2021 14:07:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243379AbhDUOHq (ORCPT ); Wed, 21 Apr 2021 10:07:46 -0400 Received: from linux.microsoft.com ([13.77.154.182]:37044 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243331AbhDUOHi (ORCPT ); Wed, 21 Apr 2021 10:07:38 -0400 Received: from viremana-dev.fwjladdvyuiujdukmejncen4mf.xx.internal.cloudapp.net (unknown [13.66.132.26]) by linux.microsoft.com (Postfix) with ESMTPSA id 13A2A20B83D9; Wed, 21 Apr 2021 07:07:05 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 13A2A20B83D9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1619014025; bh=P9T0tx6V4thRTrPOtQAfQ/tJguHGR4GMUri5ijL6nV4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s42zV5rAnxZVSW0OoYVrPF0p2ldsN0CxG+krjrfYvBEj/wU01pB2A4Xk1MZMHWW2Y q7yXqVS+B/uUIEhV8Q6sxL8E9wDasyxIM+LIp4x8LmCeRPXD3GXtI6vx/9nqFCNI9l CY/UZ51TMoRs3useGvkUNIUCVn01osoVq60ywE8Q= From: Vineeth Pillai To: Lan Tianyu , Michael Kelley , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Wei Liu , Stephen Hemminger , Haiyang Zhang Cc: Vineeth Pillai , "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "K. Y. Srinivasan" , x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org Subject: [PATCH v3 4/7] KVM: SVM: hyper-v: Nested enlightenments in VMCB Date: Wed, 21 Apr 2021 14:06:51 +0000 Message-Id: <8c24e4fe8bee44730716e28a1985b6536a9f15c5.1619013347.git.viremana@linux.microsoft.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add Hyper-V specific fields in VMCB to support SVM enlightenments. Also a small refactoring of VMCB clean bits handling. Signed-off-by: Vineeth Pillai --- arch/x86/include/asm/svm.h | 24 +++++++++++++++++++++++- arch/x86/kvm/svm/svm.c | 8 ++++++++ arch/x86/kvm/svm/svm.h | 12 +++++++++++- 3 files changed, 42 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index 1c561945b426..3586d7523ce8 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -322,9 +322,31 @@ static inline void __unused_size_checks(void) BUILD_BUG_ON(sizeof(struct ghcb) != EXPECTED_GHCB_SIZE); } + +#if IS_ENABLED(CONFIG_HYPERV) +struct __packed hv_enlightenments { + struct __packed hv_enlightenments_control { + u32 nested_flush_hypercall:1; + u32 msr_bitmap:1; + u32 enlightened_npt_tlb: 1; + u32 reserved:29; + } hv_enlightenments_control; + u32 hv_vp_id; + u64 hv_vm_id; + u64 partition_assist_page; + u64 reserved; +}; +#define VMCB_CONTROL_END 992 // 32 bytes for Hyper-V +#else +#define VMCB_CONTROL_END 1024 +#endif + struct vmcb { struct vmcb_control_area control; - u8 reserved_control[1024 - sizeof(struct vmcb_control_area)]; + u8 reserved_control[VMCB_CONTROL_END - sizeof(struct vmcb_control_area)]; +#if IS_ENABLED(CONFIG_HYPERV) + struct hv_enlightenments hv_enlightenments; +#endif struct vmcb_save_area save; } __packed; diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index baee91c1e936..9a241a0806cd 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -122,6 +123,8 @@ bool npt_enabled = true; bool npt_enabled; #endif +u32 __read_mostly vmcb_all_clean_mask = ((1 << VMCB_DIRTY_MAX) - 1); + /* * These 2 parameters are used to config the controls for Pause-Loop Exiting: * pause_filter_count: On processors that support Pause filtering(indicated @@ -1051,6 +1054,11 @@ static __init int svm_hardware_setup(void) */ allow_smaller_maxphyaddr = !npt_enabled; +#if IS_ENABLED(CONFIG_HYPERV) + if (hypervisor_is_type(X86_HYPER_MS_HYPERV)) + vmcb_all_clean_mask |= BIT(VMCB_HV_NESTED_ENLIGHTENMENTS); +#endif + return 0; err: diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index 39e071fdab0c..ff0a70bd7fce 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -51,11 +51,16 @@ enum { * AVIC LOGICAL_TABLE pointer */ VMCB_DIRTY_MAX, +#if IS_ENABLED(CONFIG_HYPERV) + VMCB_HV_NESTED_ENLIGHTENMENTS = 31, +#endif }; /* TPR and CR2 are always written before VMRUN */ #define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2)) +extern u32 vmcb_all_clean_mask __read_mostly; + struct kvm_sev_info { bool active; /* SEV enabled guest */ bool es_active; /* SEV-ES enabled guest */ @@ -230,7 +235,7 @@ static inline void vmcb_mark_all_dirty(struct vmcb *vmcb) static inline void vmcb_mark_all_clean(struct vmcb *vmcb) { - vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1) + vmcb->control.clean = vmcb_all_clean_mask & ~VMCB_ALWAYS_DIRTY_MASK; } @@ -239,6 +244,11 @@ static inline void vmcb_mark_dirty(struct vmcb *vmcb, int bit) vmcb->control.clean &= ~(1 << bit); } +static inline bool vmcb_is_clean(struct vmcb *vmcb, int bit) +{ + return (vmcb->control.clean & (1 << bit)); +} + static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu) { return container_of(vcpu, struct vcpu_svm, vcpu);