From 7d1823beeffc43669aaf7c5bc274c30e1c16e6c2 Mon Sep 17 00:00:00 2001 From: Igor Mammedov Date: Fri, 24 Sep 2021 08:27:37 -0400 Subject: [PATCH] acpi: nvdimm_build_nfit: use acpi_table_begin()/acpi_table_end() instead of build_header() it replaces error-prone pointer arithmetic for build_header() API, with 2 calls to start and finish table creation, which hides offsets magic from API user. Also since acpi_table_begin() reserves space only for standard header while previous acpi_data_push() reserved the header + 4 bytes field, add 4 bytes 'Reserved' field into nvdimm_build_nfit() which didn't have it. Signed-off-by: Igor Mammedov Reviewed-by: Eric Auger Message-Id: <20210924122802.1455362-11-imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/acpi/nvdimm.c | 42 +++++++++++++++++------------------------- 1 file changed, 17 insertions(+), 25 deletions(-) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index e3d5fe1939..15f6ca82ca 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -44,22 +44,6 @@ static const uint8_t nvdimm_nfit_spa_uuid[] = UUID_LE(0x66f0d379, 0xb4f3, 0x4074, 0xac, 0x43, 0x0d, 0x33, 0x18, 0xb7, 0x8c, 0xdb); -/* - * NVDIMM Firmware Interface Table - * @signature: "NFIT" - * - * It provides information that allows OSPM to enumerate NVDIMM present in - * the platform and associate system physical address ranges created by the - * NVDIMMs. - * - * It is defined in ACPI 6.0: 5.2.25 NVDIMM Firmware Interface Table (NFIT) - */ -struct NvdimmNfitHeader { - ACPI_TABLE_HEADER_DEF - uint32_t reserved; -} QEMU_PACKED; -typedef struct NvdimmNfitHeader NvdimmNfitHeader; - /* * define NFIT structures according to ACPI 6.0: 5.2.25 NVDIMM Firmware * Interface Table (NFIT). @@ -401,25 +385,33 @@ void nvdimm_plug(NVDIMMState *state) nvdimm_build_fit_buffer(state); } +/* + * NVDIMM Firmware Interface Table + * @signature: "NFIT" + * + * It provides information that allows OSPM to enumerate NVDIMM present in + * the platform and associate system physical address ranges created by the + * NVDIMMs. + * + * It is defined in ACPI 6.0: 5.2.25 NVDIMM Firmware Interface Table (NFIT) + */ + static void nvdimm_build_nfit(NVDIMMState *state, GArray *table_offsets, GArray *table_data, BIOSLinker *linker, const char *oem_id, const char *oem_table_id) { NvdimmFitBuffer *fit_buf = &state->fit_buf; - unsigned int header; + AcpiTable table = { .sig = "NFIT", .rev = 1, + .oem_id = oem_id, .oem_table_id = oem_table_id }; acpi_add_table(table_offsets, table_data); - /* NFIT header. */ - header = table_data->len; - acpi_data_push(table_data, sizeof(NvdimmNfitHeader)); + acpi_table_begin(&table, table_data); + /* Reserved */ + build_append_int_noprefix(table_data, 0, 4); /* NVDIMM device structures. */ g_array_append_vals(table_data, fit_buf->fit->data, fit_buf->fit->len); - - build_header(linker, table_data, - (void *)(table_data->data + header), "NFIT", - sizeof(NvdimmNfitHeader) + fit_buf->fit->len, 1, oem_id, - oem_table_id); + acpi_table_end(linker, &table); } #define NVDIMM_DSM_MEMORY_SIZE 4096