From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 2BFDAC352A3 for ; Tue, 11 Feb 2020 13:59:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0ABA62086A for ; Tue, 11 Feb 2020 13:59:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730145AbgBKN7Z (ORCPT ); Tue, 11 Feb 2020 08:59:25 -0500 Received: from 8bytes.org ([81.169.241.247]:51808 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729385AbgBKNxJ (ORCPT ); Tue, 11 Feb 2020 08:53:09 -0500 Received: by theia.8bytes.org (Postfix, from userid 1000) id 88765342; Tue, 11 Feb 2020 14:53:07 +0100 (CET) From: Joerg Roedel To: x86@kernel.org Cc: hpa@zytor.com, Andy Lutomirski , Dave Hansen , Peter Zijlstra , Thomas Hellstrom , Jiri Slaby , Dan Williams , Tom Lendacky , Juergen Gross , Kees Cook , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, Joerg Roedel , Joerg Roedel Subject: [PATCH 02/62] KVM: SVM: Add GHCB Accessor functions Date: Tue, 11 Feb 2020 14:51:56 +0100 Message-Id: <20200211135256.24617-3-joro@8bytes.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200211135256.24617-1-joro@8bytes.org> References: <20200211135256.24617-1-joro@8bytes.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joerg Roedel Building a correct GHCB for the hypervisor requires setting valid bits in the GHCB. Simplify that process by providing accessor functions to set values and to update the valid bitmap. Signed-off-by: Joerg Roedel --- arch/x86/include/asm/svm.h | 61 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index f36288c659b5..e4e9f6bacfaa 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -333,4 +333,65 @@ struct __attribute__ ((__packed__)) vmcb { #define SVM_CR0_SELECTIVE_MASK (X86_CR0_TS | X86_CR0_MP) +/* GHCB Accessor functions */ + +#define DEFINE_GHCB_INDICES(field) \ + u16 idx = offsetof(struct vmcb_save_area, field) / 8; \ + u16 byte_idx = idx / 8; \ + u16 bit_idx = idx % 8; \ + BUILD_BUG_ON(byte_idx > ARRAY_SIZE(ghcb->save.valid_bitmap)); + +#define GHCB_SET_VALID(ghcb, field) \ + { \ + DEFINE_GHCB_INDICES(field) \ + (ghcb)->save.valid_bitmap[byte_idx] |= BIT(bit_idx); \ + } + +#define DEFINE_GHCB_SETTER(field) \ + static inline void \ + ghcb_set_##field(struct ghcb *ghcb, u64 value) \ + { \ + GHCB_SET_VALID(ghcb, field) \ + (ghcb)->save.field = value; \ + } + +#define DEFINE_GHCB_ACCESSORS(field) \ + static inline bool ghcb_is_valid_##field(const struct ghcb *ghcb) \ + { \ + DEFINE_GHCB_INDICES(field) \ + return !!((ghcb)->save.valid_bitmap[byte_idx] \ + & BIT(bit_idx)); \ + } \ + \ + static inline void \ + ghcb_set_##field(struct ghcb *ghcb, u64 value) \ + { \ + GHCB_SET_VALID(ghcb, field) \ + (ghcb)->save.field = value; \ + } + +DEFINE_GHCB_ACCESSORS(cpl) +DEFINE_GHCB_ACCESSORS(rip) +DEFINE_GHCB_ACCESSORS(rsp) +DEFINE_GHCB_ACCESSORS(rax) +DEFINE_GHCB_ACCESSORS(rcx) +DEFINE_GHCB_ACCESSORS(rdx) +DEFINE_GHCB_ACCESSORS(rbx) +DEFINE_GHCB_ACCESSORS(rbp) +DEFINE_GHCB_ACCESSORS(rsi) +DEFINE_GHCB_ACCESSORS(rdi) +DEFINE_GHCB_ACCESSORS(r8) +DEFINE_GHCB_ACCESSORS(r9) +DEFINE_GHCB_ACCESSORS(r10) +DEFINE_GHCB_ACCESSORS(r11) +DEFINE_GHCB_ACCESSORS(r12) +DEFINE_GHCB_ACCESSORS(r13) +DEFINE_GHCB_ACCESSORS(r14) +DEFINE_GHCB_ACCESSORS(r15) +DEFINE_GHCB_ACCESSORS(sw_exit_code) +DEFINE_GHCB_ACCESSORS(sw_exit_info_1) +DEFINE_GHCB_ACCESSORS(sw_exit_info_2) +DEFINE_GHCB_ACCESSORS(sw_scratch) +DEFINE_GHCB_ACCESSORS(xcr0) + #endif -- 2.17.1