From patchwork Mon Jan 4 18:52:07 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 7950381 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 84F87BEEE5 for ; Mon, 4 Jan 2016 18:59:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6ADE0201C0 for ; Mon, 4 Jan 2016 18:59:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2BB9620131 for ; Mon, 4 Jan 2016 18:59:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752264AbcADS72 (ORCPT ); Mon, 4 Jan 2016 13:59:28 -0500 Received: from mga03.intel.com ([134.134.136.65]:39350 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752106AbcADS7Z (ORCPT ); Mon, 4 Jan 2016 13:59:25 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga103.jf.intel.com with ESMTP; 04 Jan 2016 10:59:25 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,521,1444719600"; d="scan'208";a="853359738" Received: from xiaoreal1.sh.intel.com (HELO xiaoreal1.sh.intel.com.sh.intel.com) ([10.239.48.79]) by orsmga001.jf.intel.com with ESMTP; 04 Jan 2016 10:59:23 -0800 From: Xiao Guangrong To: pbonzini@redhat.com, imammedo@redhat.com Cc: gleb@kernel.org, mtosatti@redhat.com, stefanha@redhat.com, mst@redhat.com, rth@twiddle.net, ehabkost@redhat.com, dan.j.williams@intel.com, kvm@vger.kernel.org, qemu-devel@nongnu.org, Xiao Guangrong Subject: [PATCH 5/6] nvdimm acpi: let qemu handle _DSM method Date: Tue, 5 Jan 2016 02:52:07 +0800 Message-Id: <1451933528-133684-6-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1451933528-133684-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1451933528-133684-1-git-send-email-guangrong.xiao@linux.intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP If dsm memory is successfully patched, we let qemu fully emulate the dsm method This patch saves _DSM input parameters into dsm memory, tell dsm memory address to QEMU, then fetch the result from the dsm memory Signed-off-by: Xiao Guangrong --- hw/acpi/aml-build.c | 27 ++++++++++ hw/acpi/nvdimm.c | 124 ++++++++++++++++++++++++++++++++++++++++++-- include/hw/acpi/aml-build.h | 2 + 3 files changed, 150 insertions(+), 3 deletions(-) diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c index 677c1a6..e65171f 100644 --- a/hw/acpi/aml-build.c +++ b/hw/acpi/aml-build.c @@ -1013,6 +1013,19 @@ Aml *create_field_common(int opcode, Aml *srcbuf, Aml *index, const char *name) return var; } +/* ACPI 1.0b: 16.2.5.2 Named Objects Encoding: DefCreateField */ +Aml *aml_create_field(Aml *srcbuf, Aml *index, Aml *len, const char *name) +{ + Aml *var = aml_alloc(); + build_append_byte(var->buf, 0x5B); /* ExtOpPrefix */ + build_append_byte(var->buf, 0x13); /* CreateFieldOp */ + aml_append(var, srcbuf); + aml_append(var, index); + aml_append(var, len); + build_append_namestring(var->buf, "%s", name); + return var; +} + /* ACPI 1.0b: 16.2.5.2 Named Objects Encoding: DefCreateDWordField */ Aml *aml_create_dword_field(Aml *srcbuf, Aml *index, const char *name) { @@ -1439,6 +1452,20 @@ Aml *aml_alias(const char *source_object, const char *alias_object) return var; } +/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefConcat */ +Aml *aml_concatenate(Aml *source1, Aml *source2, Aml *target) +{ + Aml *var = aml_opcode(0x73 /* ConcatOp */); + aml_append(var, source1); + aml_append(var, source2); + + if (target) { + aml_append(var, target); + } + + return var; +} + void build_header(GArray *linker, GArray *table_data, AcpiTableHeader *h, const char *sig, int len, uint8_t rev, diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index a72104c..dfccbc0 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -369,6 +369,24 @@ static void nvdimm_build_nfit(GSList *device_list, GArray *table_offsets, g_array_free(structures, true); } +struct NvdimmDsmIn { + uint32_t handle; + uint32_t revision; + uint32_t function; + /* the remaining size in the page is used by arg3. */ + union { + uint8_t arg3[0]; + }; +} QEMU_PACKED; +typedef struct NvdimmDsmIn NvdimmDsmIn; + +struct NvdimmDsmOut { + /* the size of buffer filled by QEMU. */ + uint32_t len; + uint8_t data[0]; +} QEMU_PACKED; +typedef struct NvdimmDsmOut NvdimmDsmOut; + static uint64_t nvdimm_dsm_read(void *opaque, hwaddr addr, unsigned size) { @@ -408,11 +426,21 @@ void nvdimm_init_acpi_state(AcpiNVDIMMState *state, MemoryRegion *io, static void nvdimm_build_common_dsm(Aml *dev) { - Aml *method, *ifctx, *function; + Aml *method, *ifctx, *function, *unpatched, *field, *high_dsm_mem; + Aml *result_size, *dsm_mem; uint8_t byte_list[1]; method = aml_method(NVDIMM_COMMON_DSM, 4, AML_NOTSERIALIZED); function = aml_arg(2); + dsm_mem = aml_arg(3); + + aml_append(method, aml_store(aml_call0(NVDIMM_GET_DSM_MEM), dsm_mem)); + + /* + * do not support any method if DSM memory address has not been + * patched. + */ + unpatched = aml_if(aml_equal(dsm_mem, aml_int64(0x0))); /* * function 0 is called to inquire what functions are supported by @@ -421,12 +449,102 @@ static void nvdimm_build_common_dsm(Aml *dev) ifctx = aml_if(aml_equal(function, aml_int(0))); byte_list[0] = 0 /* No function Supported */; aml_append(ifctx, aml_return(aml_buffer(1, byte_list))); - aml_append(method, ifctx); + aml_append(unpatched, ifctx); /* No function is supported yet. */ byte_list[0] = 1 /* Not Supported */; - aml_append(method, aml_return(aml_buffer(1, byte_list))); + aml_append(unpatched, aml_return(aml_buffer(1, byte_list))); + aml_append(method, unpatched); + + /* map DSM memory and IO into ACPI namespace. */ + aml_append(method, aml_operation_region("NPIO", AML_SYSTEM_IO, + aml_int(NVDIMM_ACPI_IO_BASE), NVDIMM_ACPI_IO_LEN)); + aml_append(method, aml_operation_region("NRAM", AML_SYSTEM_MEMORY, + dsm_mem, TARGET_PAGE_SIZE)); + + /* + * DSM notifier: + * LNTF: write the low 32 bits of DSM memory. + * HNTF: write the high 32 bits of DSM memory and notify QEMU to + * emulate the access. + * + * They are IO ports so that accessing them will cause VM-exit, the + * control will be transferred to QEMU. + */ + field = aml_field("NPIO", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE); + aml_append(field, aml_named_field("LNTF", + sizeof(uint32_t) * BITS_PER_BYTE)); + aml_append(field, aml_named_field("HNTF", + sizeof(uint32_t) * BITS_PER_BYTE)); + aml_append(method, field); + /* + * DSM input: + * @HDLE: store device's handle, it's zero if the _DSM call happens + * on NVDIMM Root Device. + * @REVS: store the Arg1 of _DSM call. + * @FUNC: store the Arg2 of _DSM call. + * @ARG3: store the Arg3 of _DSM call. + * + * They are RAM mapping on host so that these accesses never cause + * VM-EXIT. + */ + field = aml_field("NRAM", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE); + aml_append(field, aml_named_field("HDLE", + sizeof(typeof_field(NvdimmDsmIn, handle)) * BITS_PER_BYTE)); + aml_append(field, aml_named_field("REVS", + sizeof(typeof_field(NvdimmDsmIn, revision)) * BITS_PER_BYTE)); + aml_append(field, aml_named_field("FUNC", + sizeof(typeof_field(NvdimmDsmIn, function)) * BITS_PER_BYTE)); + aml_append(field, aml_named_field("ARG3", + (TARGET_PAGE_SIZE - offsetof(NvdimmDsmIn, arg3)) * + BITS_PER_BYTE)); + aml_append(method, field); + + /* + * DSM output: + * @RLEN: the size of the buffer filled by QEMU. + * @ODAT: the buffer QEMU uses to store the result. + * + * Since the page is reused by both input and out, the input data + * will be lost after storing new result into @ODAT. + */ + field = aml_field("NRAM", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE); + aml_append(field, aml_named_field("RLEN", + sizeof(typeof_field(NvdimmDsmOut, len)) * BITS_PER_BYTE)); + aml_append(field, aml_named_field("ODAT", + (TARGET_PAGE_SIZE - offsetof(NvdimmDsmOut, data)) * + BITS_PER_BYTE)); + aml_append(method, field); + + /* + * Currently no function is supported for both root device and NVDIMM + * devices, let's temporarily set handle to 0x0 at this time. + */ + aml_append(method, aml_store(aml_int(0x0), aml_name("HDLE"))); + aml_append(method, aml_store(aml_arg(1), aml_name("REVS"))); + aml_append(method, aml_store(aml_arg(2), aml_name("FUNC"))); + + /* + * tell QEMU about the real address of DSM memory, then QEMU begins + * to emulate the method and fills the result to DSM memory. + */ + aml_append(method, aml_store(dsm_mem, aml_name("LNTF"))); + high_dsm_mem = aml_shiftright(dsm_mem, + aml_int(sizeof(uint32_t) * BITS_PER_BYTE), + NULL); + aml_append(method, aml_store(high_dsm_mem, aml_name("HNTF"))); + + result_size = aml_local(1); + aml_append(method, aml_store(aml_name("RLEN"), result_size)); + aml_append(method, aml_store(aml_shiftleft(result_size, aml_int(3)), + result_size)); + aml_append(method, aml_create_field(aml_name("ODAT"), aml_int(0), + result_size, "OBUF")); + aml_append(method, aml_name_decl("ZBUF", aml_buffer(0, NULL))); + aml_append(method, aml_concatenate(aml_name("ZBUF"), aml_name("OBUF"), + aml_arg(6))); + aml_append(method, aml_return(aml_arg(6))); aml_append(dev, method); } diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h index a8d8f3b..6c1816e 100644 --- a/include/hw/acpi/aml-build.h +++ b/include/hw/acpi/aml-build.h @@ -344,6 +344,7 @@ Aml *aml_mutex(const char *name, uint8_t sync_level); Aml *aml_acquire(Aml *mutex, uint16_t timeout); Aml *aml_release(Aml *mutex); Aml *aml_alias(const char *source_object, const char *alias_object); +Aml *aml_create_field(Aml *srcbuf, Aml *index, Aml *len, const char *name); Aml *aml_create_dword_field(Aml *srcbuf, Aml *index, const char *name); Aml *aml_create_qword_field(Aml *srcbuf, Aml *index, const char *name); Aml *aml_varpackage(uint32_t num_elements); @@ -351,6 +352,7 @@ Aml *aml_touuid(const char *uuid); Aml *aml_unicode(const char *str); Aml *aml_derefof(Aml *arg); Aml *aml_sizeof(Aml *arg); +Aml *aml_concatenate(Aml *source1, Aml *source2, Aml *target); void build_header(GArray *linker, GArray *table_data,