From: Xiao Guangrong <guangrong.xiao@linux.intel.com> 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 <guangrong.xiao@linux.intel.com> Subject: [PATCH v2 08/11] nvdimm acpi: let qemu handle _DSM method Date: Wed, 13 Jan 2016 02:50:07 +0800 [thread overview] Message-ID: <1452624610-46945-9-git-send-email-guangrong.xiao@linux.intel.com> (raw) In-Reply-To: <1452624610-46945-1-git-send-email-guangrong.xiao@linux.intel.com> 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 <guangrong.xiao@linux.intel.com> --- hw/acpi/nvdimm.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 112 insertions(+), 5 deletions(-) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index e7acc98..358e340 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -371,6 +371,24 @@ 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) { @@ -410,11 +428,18 @@ 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, *dsm_mem, *unpatched, *result_size; uint8_t byte_list[1]; - method = aml_method(NVDIMM_COMMON_DSM, 4, AML_NOTSERIALIZED); + method = aml_method(NVDIMM_COMMON_DSM, 4, AML_SERIALIZED); function = aml_arg(2); + dsm_mem = aml_name(NVDIMM_ACPI_MEM_ADDR); + + /* + * do not support any method if DSM memory address has not been + * patched. + */ + unpatched = aml_if(aml_equal(dsm_mem, aml_int(0x0))); /* * function 0 is called to inquire what functions are supported by @@ -423,12 +448,36 @@ 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); + + /* + * 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("NTFI"))); + + 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_concatenate(aml_buffer(0, NULL), aml_name("OBUF"), + aml_arg(6))); + aml_append(method, aml_return(aml_arg(6))); aml_append(dev, method); } @@ -471,7 +520,7 @@ static void nvdimm_build_nvdimm_devices(GSList *device_list, Aml *root_dev) static void nvdimm_build_ssdt(GSList *device_list, GArray *table_offsets, GArray *table_data, GArray *linker) { - Aml *ssdt, *sb_scope, *dev, *mem_addr; + Aml *ssdt, *sb_scope, *dev, *field, *mem_addr; uint32_t zero_offset = 0; int offset; @@ -497,6 +546,64 @@ static void nvdimm_build_ssdt(GSList *device_list, GArray *table_offsets, */ aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0012"))); + /* map DSM memory and IO into ACPI namespace. */ + aml_append(dev, aml_operation_region("NPIO", AML_SYSTEM_IO, + aml_int(NVDIMM_ACPI_IO_BASE), NVDIMM_ACPI_IO_LEN)); + aml_append(dev, aml_operation_region("NRAM", AML_SYSTEM_MEMORY, + aml_name(NVDIMM_ACPI_MEM_ADDR), TARGET_PAGE_SIZE)); + + /* + * DSM notifier: + * NTFI: write the address of DSM memory and notify QEMU to emulate + * the access. + * + * It is the IO port 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("NTFI", + sizeof(uint32_t) * BITS_PER_BYTE)); + aml_append(dev, 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(dev, 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(dev, field); + nvdimm_build_common_dsm(dev); nvdimm_build_device_dsm(dev); -- 1.8.3.1
WARNING: multiple messages have this Message-ID (diff)
From: Xiao Guangrong <guangrong.xiao@linux.intel.com> To: pbonzini@redhat.com, imammedo@redhat.com Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>, ehabkost@redhat.com, kvm@vger.kernel.org, mst@redhat.com, gleb@kernel.org, mtosatti@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, dan.j.williams@intel.com, rth@twiddle.net Subject: [Qemu-devel] [PATCH v2 08/11] nvdimm acpi: let qemu handle _DSM method Date: Wed, 13 Jan 2016 02:50:07 +0800 [thread overview] Message-ID: <1452624610-46945-9-git-send-email-guangrong.xiao@linux.intel.com> (raw) In-Reply-To: <1452624610-46945-1-git-send-email-guangrong.xiao@linux.intel.com> 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 <guangrong.xiao@linux.intel.com> --- hw/acpi/nvdimm.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 112 insertions(+), 5 deletions(-) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index e7acc98..358e340 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -371,6 +371,24 @@ 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) { @@ -410,11 +428,18 @@ 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, *dsm_mem, *unpatched, *result_size; uint8_t byte_list[1]; - method = aml_method(NVDIMM_COMMON_DSM, 4, AML_NOTSERIALIZED); + method = aml_method(NVDIMM_COMMON_DSM, 4, AML_SERIALIZED); function = aml_arg(2); + dsm_mem = aml_name(NVDIMM_ACPI_MEM_ADDR); + + /* + * do not support any method if DSM memory address has not been + * patched. + */ + unpatched = aml_if(aml_equal(dsm_mem, aml_int(0x0))); /* * function 0 is called to inquire what functions are supported by @@ -423,12 +448,36 @@ 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); + + /* + * 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("NTFI"))); + + 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_concatenate(aml_buffer(0, NULL), aml_name("OBUF"), + aml_arg(6))); + aml_append(method, aml_return(aml_arg(6))); aml_append(dev, method); } @@ -471,7 +520,7 @@ static void nvdimm_build_nvdimm_devices(GSList *device_list, Aml *root_dev) static void nvdimm_build_ssdt(GSList *device_list, GArray *table_offsets, GArray *table_data, GArray *linker) { - Aml *ssdt, *sb_scope, *dev, *mem_addr; + Aml *ssdt, *sb_scope, *dev, *field, *mem_addr; uint32_t zero_offset = 0; int offset; @@ -497,6 +546,64 @@ static void nvdimm_build_ssdt(GSList *device_list, GArray *table_offsets, */ aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0012"))); + /* map DSM memory and IO into ACPI namespace. */ + aml_append(dev, aml_operation_region("NPIO", AML_SYSTEM_IO, + aml_int(NVDIMM_ACPI_IO_BASE), NVDIMM_ACPI_IO_LEN)); + aml_append(dev, aml_operation_region("NRAM", AML_SYSTEM_MEMORY, + aml_name(NVDIMM_ACPI_MEM_ADDR), TARGET_PAGE_SIZE)); + + /* + * DSM notifier: + * NTFI: write the address of DSM memory and notify QEMU to emulate + * the access. + * + * It is the IO port 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("NTFI", + sizeof(uint32_t) * BITS_PER_BYTE)); + aml_append(dev, 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(dev, 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(dev, field); + nvdimm_build_common_dsm(dev); nvdimm_build_device_dsm(dev); -- 1.8.3.1
next prev parent reply other threads:[~2016-01-12 18:57 UTC|newest] Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-01-12 18:49 [PATCH v2 00/11] NVDIMM ACPI: introduce the framework of QEMU emulated Xiao Guangrong 2016-01-12 18:49 ` [Qemu-devel] " Xiao Guangrong 2016-01-12 18:50 ` [PATCH v2 01/11] tests: acpi: test multiple SSDT tables Xiao Guangrong 2016-01-12 18:50 ` [Qemu-devel] " Xiao Guangrong 2016-01-12 18:50 ` [PATCH v2 02/11] tests: acpi: test NVDIMM tables Xiao Guangrong 2016-01-12 18:50 ` [Qemu-devel] " Xiao Guangrong 2016-02-04 16:20 ` Michael S. Tsirkin 2016-02-04 16:20 ` [Qemu-devel] " Michael S. Tsirkin 2016-02-14 5:36 ` Xiao Guangrong 2016-02-14 5:36 ` [Qemu-devel] " Xiao Guangrong 2016-01-12 18:50 ` [PATCH v2 03/11] acpi: add aml_create_field() Xiao Guangrong 2016-01-12 18:50 ` [Qemu-devel] " Xiao Guangrong 2016-02-08 10:47 ` Igor Mammedov 2016-02-08 10:47 ` [Qemu-devel] " Igor Mammedov 2016-02-14 5:41 ` Xiao Guangrong 2016-02-14 5:41 ` [Qemu-devel] " Xiao Guangrong 2016-01-12 18:50 ` [PATCH v2 04/11] acpi: add aml_concatenate() Xiao Guangrong 2016-01-12 18:50 ` [Qemu-devel] " Xiao Guangrong 2016-02-08 10:51 ` Igor Mammedov 2016-02-08 10:51 ` [Qemu-devel] " Igor Mammedov 2016-02-14 5:52 ` Xiao Guangrong 2016-02-14 5:52 ` [Qemu-devel] " Xiao Guangrong 2016-02-14 5:55 ` Xiao Guangrong 2016-02-14 5:55 ` [Qemu-devel] " Xiao Guangrong 2016-02-15 9:02 ` Igor Mammedov 2016-02-15 9:02 ` [Qemu-devel] " Igor Mammedov 2016-02-15 10:32 ` Xiao Guangrong 2016-02-15 10:32 ` [Qemu-devel] " Xiao Guangrong 2016-01-12 18:50 ` [PATCH v2 05/11] acpi: allow using object as offset for OperationRegion Xiao Guangrong 2016-01-12 18:50 ` [Qemu-devel] " Xiao Guangrong 2016-02-08 10:57 ` Igor Mammedov 2016-02-08 10:57 ` [Qemu-devel] " Igor Mammedov 2016-01-12 18:50 ` [PATCH v2 06/11] nvdimm acpi: initialize the resource used by NVDIMM ACPI Xiao Guangrong 2016-01-12 18:50 ` [Qemu-devel] " Xiao Guangrong 2016-02-04 16:22 ` Michael S. Tsirkin 2016-02-04 16:22 ` [Qemu-devel] " Michael S. Tsirkin 2016-02-08 11:03 ` Igor Mammedov 2016-02-08 11:03 ` [Qemu-devel] " Igor Mammedov 2016-02-14 5:57 ` Xiao Guangrong 2016-02-14 5:57 ` [Qemu-devel] " Xiao Guangrong 2016-02-15 9:11 ` Igor Mammedov 2016-02-15 9:18 ` Michael S. Tsirkin 2016-02-15 10:13 ` Xiao Guangrong 2016-02-15 10:30 ` Michael S. Tsirkin 2016-02-15 10:30 ` Michael S. Tsirkin 2016-02-15 10:47 ` Igor Mammedov 2016-02-15 10:47 ` Igor Mammedov 2016-02-15 11:22 ` Xiao Guangrong 2016-02-15 11:22 ` Xiao Guangrong 2016-02-15 11:45 ` Michael S. Tsirkin 2016-02-15 13:32 ` Igor Mammedov 2016-02-15 15:53 ` Xiao Guangrong 2016-02-15 17:24 ` Igor Mammedov 2016-02-15 17:24 ` Igor Mammedov 2016-02-15 18:35 ` Xiao Guangrong 2016-02-15 18:35 ` Xiao Guangrong 2016-02-16 11:00 ` Igor Mammedov 2016-02-17 2:04 ` Xiao Guangrong 2016-02-17 17:26 ` Michael S. Tsirkin 2016-02-17 17:26 ` Michael S. Tsirkin 2016-02-18 4:03 ` Xiao Guangrong 2016-02-18 4:03 ` Xiao Guangrong 2016-02-18 10:05 ` Igor Mammedov 2016-02-18 10:05 ` [Qemu-devel] " Igor Mammedov 2016-02-19 8:08 ` Michael S. Tsirkin 2016-02-19 8:43 ` Dan Williams 2016-02-19 8:43 ` Dan Williams 2016-02-22 10:30 ` Xiao Guangrong 2016-02-22 10:30 ` Xiao Guangrong 2016-02-22 10:34 ` Xiao Guangrong 2016-02-18 10:20 ` Michael S. Tsirkin 2016-02-18 10:20 ` Michael S. Tsirkin 2016-02-15 11:36 ` Michael S. Tsirkin 2016-02-15 11:36 ` Michael S. Tsirkin 2016-01-12 18:50 ` [PATCH v2 07/11] nvdimm acpi: introduce patched dsm memory Xiao Guangrong 2016-01-12 18:50 ` [Qemu-devel] " Xiao Guangrong 2016-01-12 18:50 ` Xiao Guangrong [this message] 2016-01-12 18:50 ` [Qemu-devel] [PATCH v2 08/11] nvdimm acpi: let qemu handle _DSM method Xiao Guangrong 2016-01-12 18:50 ` [PATCH v2 09/11] nvdimm acpi: emulate dsm method Xiao Guangrong 2016-01-12 18:50 ` [Qemu-devel] " Xiao Guangrong 2016-01-12 18:50 ` [PATCH v2 10/11] nvdimm acpi: add _CRS Xiao Guangrong 2016-01-12 18:50 ` [Qemu-devel] " Xiao Guangrong 2016-01-12 18:50 ` [PATCH v2 11/11] tests: acpi: update nvdimm ssdt table Xiao Guangrong 2016-01-12 18:50 ` [Qemu-devel] " Xiao Guangrong 2016-01-20 2:21 ` [PATCH v2 00/11] NVDIMM ACPI: introduce the framework of QEMU emulated Xiao Guangrong 2016-01-20 2:21 ` [Qemu-devel] " Xiao Guangrong 2016-01-28 4:42 ` Xiao Guangrong 2016-01-28 4:42 ` [Qemu-devel] " Xiao Guangrong 2016-02-04 16:24 ` Michael S. Tsirkin 2016-02-04 16:24 ` [Qemu-devel] " Michael S. Tsirkin 2016-02-14 5:38 ` Xiao Guangrong 2016-02-14 5:38 ` Xiao Guangrong
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