From patchwork Thu Jan 25 03:22:25 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13529854 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E90776FD5 for ; Thu, 25 Jan 2024 03:28:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706153287; cv=none; b=Kfj0EeL5t3+moqzp1woQz05ycunAcfNkkDkn0O5nma0KgOQw/JmstjH97d6bGUWIAsSBU5Qua6sKq/K33e8t3fnfDbpHXkwO2L0pwwepydJUKB7JWiJ+SiGnMsKcMkxn+X8aUftB8IQ9thb31eaEas7S2eg7OZ9iQ2veBKfjmzo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706153287; c=relaxed/simple; bh=2mNwsjv6vluae8uBwx0X4bXjQ8lU44YLJ4VZgJtV40o=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=XooMykxEN2eJpyZ8yHuogy5FUvWSBXbhz3nfr+pSvejZcBz0d/tpKm0vvp5qu5qJ4JaJuUUyhGa0eB7V3KDLyJ88adgA7DxW44pUBZjYm8g+WnrhW9+LbMFYC12aIZI5OSZ9dO+IMfjRpD2vUOSaaspe9+omgdwRBvuzQAu378Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Iewozhje; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Iewozhje" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706153286; x=1737689286; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=2mNwsjv6vluae8uBwx0X4bXjQ8lU44YLJ4VZgJtV40o=; b=IewozhjedzRzUFhz8P4/fTykDHETByms4j0CHrn6kD1iHI8iWsaTDeTA 53EriQYdLm+Y35eddaFm0OHnFtRK28iaqoFp5oEjWEXIAUlP9BMOc5k0+ AzRttY3hQI8G6SDM09QdYrKj8K4rrRYlaUx2Bnz+ODVdS437HMUZ7YPeR jJbF0/HTr24ypGtSbSSgOyjc/xj+8zkIo65jm4HR0jwCXgQNoLDj0SJg8 Sh00u/F4cLuoGJgGhk16tjiA2PSAS7H4MaHHPDbJ//8QipwI/P+yBEMzp K7V4Xzq+Lpdg9GbNdml1g07jsGtVJZBn4czgRFxOpK253fVJFecWJgQMU w==; X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="9427924" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="9427924" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2024 19:23:54 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="2084440" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by orviesa005.jf.intel.com with ESMTP; 24 Jan 2024 19:23:48 -0800 From: Xiaoyao Li To: Paolo Bonzini , David Hildenbrand , Igor Mammedov , "Michael S . Tsirkin" , Marcel Apfelbaum , Richard Henderson , Peter Xu , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Cornelia Huck , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Eric Blake , Markus Armbruster , Marcelo Tosatti Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, xiaoyao.li@intel.com, Michael Roth , Sean Christopherson , Claudio Fontana , Gerd Hoffmann , Isaku Yamahata , Chenyi Qiang Subject: [PATCH v4 03/66] HostMem: Add mechanism to opt in kvm guest memfd via MachineState Date: Wed, 24 Jan 2024 22:22:25 -0500 Message-Id: <20240125032328.2522472-4-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240125032328.2522472-1-xiaoyao.li@intel.com> References: <20240125032328.2522472-1-xiaoyao.li@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add a new member "guest_memfd" to memory backends. When it's set to true, it enables RAM_GUEST_MEMFD in ram_flags, thus private kvm guest_memfd will be allocated during RAMBlock allocation. Memory backend's @guest_memfd is wired with @require_guest_memfd field of MachineState. It avoid looking up the machine in phymem.c. MachineState::require_guest_memfd is supposed to be set by any VMs that requires KVM guest memfd as private memory, e.g., TDX VM. Signed-off-by: Xiaoyao Li Reviewed-by: David Hildenbrand --- Changes in v4: - rename "require_guest_memfd" to "guest_memfd" in struct HostMemoryBackend; (David Hildenbrand) --- backends/hostmem-file.c | 1 + backends/hostmem-memfd.c | 1 + backends/hostmem-ram.c | 1 + backends/hostmem.c | 1 + hw/core/machine.c | 5 +++++ include/hw/boards.h | 2 ++ include/sysemu/hostmem.h | 1 + 7 files changed, 12 insertions(+) diff --git a/backends/hostmem-file.c b/backends/hostmem-file.c index ac3e433cbddb..3c69db794607 100644 --- a/backends/hostmem-file.c +++ b/backends/hostmem-file.c @@ -85,6 +85,7 @@ file_backend_memory_alloc(HostMemoryBackend *backend, Error **errp) ram_flags |= fb->readonly ? RAM_READONLY_FD : 0; ram_flags |= fb->rom == ON_OFF_AUTO_ON ? RAM_READONLY : 0; ram_flags |= backend->reserve ? 0 : RAM_NORESERVE; + ram_flags |= backend->guest_memfd ? RAM_GUEST_MEMFD : 0; ram_flags |= fb->is_pmem ? RAM_PMEM : 0; ram_flags |= RAM_NAMED_FILE; return memory_region_init_ram_from_file(&backend->mr, OBJECT(backend), name, diff --git a/backends/hostmem-memfd.c b/backends/hostmem-memfd.c index 3923ea9364d5..745ead0034dc 100644 --- a/backends/hostmem-memfd.c +++ b/backends/hostmem-memfd.c @@ -55,6 +55,7 @@ memfd_backend_memory_alloc(HostMemoryBackend *backend, Error **errp) name = host_memory_backend_get_name(backend); ram_flags = backend->share ? RAM_SHARED : 0; ram_flags |= backend->reserve ? 0 : RAM_NORESERVE; + ram_flags |= backend->guest_memfd ? RAM_GUEST_MEMFD : 0; return memory_region_init_ram_from_fd(&backend->mr, OBJECT(backend), name, backend->size, ram_flags, fd, 0, errp); } diff --git a/backends/hostmem-ram.c b/backends/hostmem-ram.c index d121249f0f45..f7d81af783a5 100644 --- a/backends/hostmem-ram.c +++ b/backends/hostmem-ram.c @@ -30,6 +30,7 @@ ram_backend_memory_alloc(HostMemoryBackend *backend, Error **errp) name = host_memory_backend_get_name(backend); ram_flags = backend->share ? RAM_SHARED : 0; ram_flags |= backend->reserve ? 0 : RAM_NORESERVE; + ram_flags |= backend->guest_memfd ? RAM_GUEST_MEMFD : 0; return memory_region_init_ram_flags_nomigrate(&backend->mr, OBJECT(backend), name, backend->size, ram_flags, errp); diff --git a/backends/hostmem.c b/backends/hostmem.c index 30f69b2cb5e9..b1c39e8065e2 100644 --- a/backends/hostmem.c +++ b/backends/hostmem.c @@ -276,6 +276,7 @@ static void host_memory_backend_init(Object *obj) /* TODO: convert access to globals to compat properties */ backend->merge = machine_mem_merge(machine); backend->dump = machine_dump_guest_core(machine); + backend->guest_memfd = machine_require_guest_memfd(machine); backend->reserve = true; backend->prealloc_threads = machine->smp.cpus; } diff --git a/hw/core/machine.c b/hw/core/machine.c index fb5afdcae4cc..514a201dc570 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -1192,6 +1192,11 @@ bool machine_mem_merge(MachineState *machine) return machine->mem_merge; } +bool machine_require_guest_memfd(MachineState *machine) +{ + return machine->require_guest_memfd; +} + static char *cpu_slot_to_string(const CPUArchId *cpu) { GString *s = g_string_new(NULL); diff --git a/include/hw/boards.h b/include/hw/boards.h index bcfde8a84d10..2e6156ae96b8 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -36,6 +36,7 @@ bool machine_usb(MachineState *machine); int machine_phandle_start(MachineState *machine); bool machine_dump_guest_core(MachineState *machine); bool machine_mem_merge(MachineState *machine); +bool machine_require_guest_memfd(MachineState *machine); HotpluggableCPUList *machine_query_hotpluggable_cpus(MachineState *machine); void machine_set_cpu_numa_node(MachineState *machine, const CpuInstanceProperties *props, @@ -370,6 +371,7 @@ struct MachineState { char *dt_compatible; bool dump_guest_core; bool mem_merge; + bool require_guest_memfd; bool usb; bool usb_disabled; char *firmware; diff --git a/include/sysemu/hostmem.h b/include/sysemu/hostmem.h index 0e411aaa29e1..04b884bf42a6 100644 --- a/include/sysemu/hostmem.h +++ b/include/sysemu/hostmem.h @@ -74,6 +74,7 @@ struct HostMemoryBackend { uint64_t size; bool merge, dump, use_canonical_path; bool prealloc, is_mapped, share, reserve; + bool guest_memfd; uint32_t prealloc_threads; ThreadContext *prealloc_context; DECLARE_BITMAP(host_nodes, MAX_NODES + 1);