From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f202.google.com (mail-pg1-f202.google.com [209.85.215.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 042E9174DA for ; Fri, 18 Aug 2023 23:14:34 +0000 (UTC) Received: by mail-pg1-f202.google.com with SMTP id 41be03b00d2f7-565aee6e925so1822346a12.0 for ; Fri, 18 Aug 2023 16:14:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1692400474; x=1693005274; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=5DZepNUwrlYIieQTJr9Dh/3tOxOseVHo5Xld8dMNuNg=; b=lsQ+HVzfe/LvJcjpi5EkUeNksPQ4SKFkDuitTo8QZ8/V1sWcr6kxph8TKOQUDPuQY6 3R+Pf/jmvF5hwJvwA/qd5EZ3umv7mDUrFv27YvRHTc8kZljL+me7hAdDiSfTlWvFfEj/ coNhxIPQ3jfxMfHlGddYmQDEEwSQ+Y5RTQnvOpYtmp6kPuX7mXVgS6zWmHmU+sPbmIdm 3HwG+UlgYVsM7jRmT+4vVPawxf3yitDSjepBo5MpteRZM1D0Vdl8EmV210P/oEzmRyXa r4YJEufogWKx1B2Git+TQpUucYnwL9g/7hgB267fQrq1A8h/ysQfdzEjFcPJQrGcpD54 aN0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692400474; x=1693005274; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=5DZepNUwrlYIieQTJr9Dh/3tOxOseVHo5Xld8dMNuNg=; b=hFHqY17hQoe6Mevc8nK/URFNcSaAPADs907S9oy+VxHzXLw9hxzXy3mg6daJzOHGV0 d0ECOlEiTouHXWh2e5d2FbO8JKi5Kv6J3OfhbGcR8Mb9VutAMUU9jjOXA9ZbuNCObFyL iRfD+414yYD43Ibp8s8J5TG1J1wayOR363QATTpXDCcw+m6f/s3zlDO2wS4FuE5A1yOa WJP3h43+LVhMFwNh/PT5e8pROkDb/azuQ7NSL9QAyguHo8gQ/mwBANbkJQVbcbzY4v2n s3M6tavnfShSA4rxSwePA969RMKBiaXaaGwqH+LAIX8m+7LUDBSpOhdHUUuHdNvVlTcP KFQQ== X-Gm-Message-State: AOJu0YyrWURzxxbyvYPzkTLgTQq4XNiO1yDC1AogU4C8sXh76FBIDILu iaI8iGMl2gpm1zGagJdoKkFF+RloDlI= X-Google-Smtp-Source: AGHT+IF9HyPZ8NYi1dOCnWJqmB9Xg8StOO2+i4hjQBZ6kPAEn5MgrO+XU77nUxSPGBzB9RxPZ8c5rXOzSME= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a63:3ecd:0:b0:565:56be:4dee with SMTP id l196-20020a633ecd000000b0056556be4deemr124213pga.8.1692400474224; Fri, 18 Aug 2023 16:14:34 -0700 (PDT) Date: Fri, 18 Aug 2023 16:14:18 -0700 In-Reply-To: Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.42.0.rc1.204.g551eb34607-goog Message-ID: <169239820500.1761806.6161030396328593760.b4-ty@google.com> Subject: Re: [PATCH 0/8] KVM: gmem: Adding hooks for SEV and TDX From: Sean Christopherson To: Sean Christopherson , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, isaku.yamahata@intel.com Cc: isaku.yamahata@gmail.com, Michael Roth , Paolo Bonzini , erdemaktas@google.com, Sagi Shahar , David Matlack , Kai Huang , Zhi Wang , chen.bo@intel.com, linux-coco@lists.linux.dev, Chao Peng , Ackerley Tng , Vishal Annapurve , Yuan Yao , Jarkko Sakkinen , Xu Yilun , Quentin Perret , wei.w.wang@intel.com, Fuad Tabba Content-Type: text/plain; charset="utf-8" On Tue, 15 Aug 2023 10:18:47 -0700, isaku.yamahata@intel.com wrote: > From: Isaku Yamahata > > This patch series for KVM guest memfd is to have common code base for SEV and > TDX. Several minor fixes. Based on this patch series, TDX KVM can defer page > clearing without mmu lock. > > Isaku Yamahata (6): > KVM: gmem: Make kvm_gmem_bind return EBADF on wrong fd > KVM: gmem: removed duplicated kvm_gmem_init() > KVM: gmem: Fix kvm_gmem_issue_arch_invalidate() > KVM: gmem: protect kvm_mmu_invalidate_end() > KVM: gmem: Avoid race with kvm_gmem_release and mmu notifier > RFC: KVM: gmem: Guarantee the order of destruction > > [...] Applied patches 1 and 2 to kvm-x86 guest_memfd. I'll post the alternative approach for fixing the unlocking bug next week (need to test, and I'm out of time this week). Regarding the initialize/invalidate hooks, I resurrected the discussion from the previous version[*], I'd like to bottom out on a solution in that thread before applying anything. [*] https://lore.kernel.org/all/ZN%2FwY53TF2aOZtLu@google.com [1/8] KVM: gmem: Make kvm_gmem_bind return EBADF on wrong fd https://github.com/kvm-x86/linux/commit/07ac04fbefce [2/8] KVM: gmem: removed duplicated kvm_gmem_init() https://github.com/kvm-x86/linux/commit/9ab46d91d5ea -- https://github.com/kvm-x86/linux/tree/next https://github.com/kvm-x86/linux/tree/fixes