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[2620:137:e000::1:20]) by mx.google.com with ESMTP id m16-20020a63f610000000b00477fbd59895si40682990pgh.852.2023.01.19.14.02.10; Thu, 19 Jan 2023 14:02:24 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20210112 header.b=EpJxslMi; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230023AbjASVxu (ORCPT + 99 others); Thu, 19 Jan 2023 16:53:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38344 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230343AbjASVxH (ORCPT ); Thu, 19 Jan 2023 16:53:07 -0500 Received: from mail-pl1-x64a.google.com (mail-pl1-x64a.google.com [IPv6:2607:f8b0:4864:20::64a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 65A7AB1EDB for ; Thu, 19 Jan 2023 13:34:30 -0800 (PST) Received: by mail-pl1-x64a.google.com with SMTP id u2-20020a17090341c200b00192bc565119so2018181ple.16 for ; Thu, 19 Jan 2023 13:34:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=Voz2cPbyTGcLhdRPa/ltDW1JwajbV9yh0vKVRBbRKuk=; b=EpJxslMiPB369mzUjjkYlm6uPL2QZKBT7oLzN1SQCEJGb4OXXMQ43ol3BP9+XPdEML mKddYwLg2y/WgeVcvjE7lSb4L8IwQq48ztab2GpzAUIxLhCraMPm4flX/rvLREjQ1BJ/ woPfmP8Q23JtzXFIS7OaFL9JT1D2WaGEXJL3USd5zlyxb0dpYJ+W1U25rhavicsawLcR XJA2m/JvJ0TkuWoccvxVy46kO3QcVjeALowtEpv+iJzDWc0cBGponBViOUHM0/hSyi7x qRuaQX1FtSizviOM28/qGR/R2MLtvi6ppiyasaYh/ZRh1uoBjiHnPkvrwWHMOKVs/hj/ tSiA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Voz2cPbyTGcLhdRPa/ltDW1JwajbV9yh0vKVRBbRKuk=; b=if9xMFwdx7EJvyAObqhqtlB8usjW/IB42WTbWEAaW1cyA+kcEkRaapK9E5HfhFFvG4 EjPxrnJiy8ltUMGAGNNF2RjmshoABesQZnKG+qhOvayA0+g0596ZSvJK+9P0qSmq/vbi jxJsguC8naH1q0Wa6OtWitGPVVWSgavFbeNz1jyiqsnJ7TP2IGYjewcOHRKaWknRmsxs gRNE3xDKHYSjST+ZnWDRw84PjygYlMskgI9C2nb2yZ1aPuKyGW0x7xtWUg63R0Q0PMzI 6F86fwvONqR5FfzymI23AqrtZnPAL3PViTTZjLiDGUOmzD6kCXxnhy9SdxQKeYVZvJnU 8lNg== X-Gm-Message-State: AFqh2kqgcTsFaGadBQnSbFJ8gOmr2qiew1ZV7qdpDbYhg81B4xDi6GFm U3xf5U5lF3SF6AsS/7zwtjxqRAzollneA7XVpQ== X-Received: from dionnaglaze.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:2ee6]) (user=dionnaglaze job=sendgmr) by 2002:a17:902:b111:b0:189:a50d:2a23 with SMTP id q17-20020a170902b11100b00189a50d2a23mr1212871plr.32.1674164069271; Thu, 19 Jan 2023 13:34:29 -0800 (PST) Date: Thu, 19 Jan 2023 21:34:23 +0000 Mime-Version: 1.0 X-Mailer: git-send-email 2.39.0.246.g2a6d74b583-goog Message-ID: <20230119213426.379312-1-dionnaglaze@google.com> Subject: [PATCH v3 0/2] kvm: sev: Add SNP guest request throttling From: Dionna Glaze To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org Cc: Dionna Glaze X-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755490019643904125?= X-GMAIL-MSGID: =?utf-8?q?1755490019643904125?= This patch series is based on [RFC,v7,00/64] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support The GHCB specification recommends that SNP guest requests should be rate limited. This 2 patch series adds such rate limiting with a 2 burst, 2 second interval per VM as the default values for two new kvm-amd module parameters: guest_request_throttle_s guest_request_throttle_burst This patch series cooperates with the guest series, Add throttling detection to sev-guest in order for guests to retry when throttled, rather than disable the VMPCK and fail to complete their request. Changes since v2: * Rebased on v7, changed "we" wording to passive voice. Changes since v1: * Added missing Ccs to patches. Dionna Glaze (2): kvm: sev: Add SEV-SNP guest request throttling kvm: sev: If ccp is busy, report throttled to guest arch/x86/include/asm/sev-common.h | 1 + arch/x86/kvm/svm/sev.c | 47 +++++++++++++++++++++++++++++-- arch/x86/kvm/svm/svm.h | 3 ++ include/uapi/linux/in.h | 1 + 4 files changed, 50 insertions(+), 2 deletions(-)