From 04f143d828845d0fd52dd4a52664d81a4f5431f7 Mon Sep 17 00:00:00 2001 From: Felix Wu Date: Wed, 21 Feb 2024 17:00:27 +0000 Subject: [PATCH] Implement SMBIOS type 9 v2.6 Signed-off-by: Felix Wu Signed-off-by: Nabih Estefan Message-Id: <20240221170027.1027325-3-nabihestefan@google.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/smbios/smbios.c | 49 +++++++++++++++++++++++++++++++++--- include/hw/firmware/smbios.h | 4 +++ qemu-options.hx | 2 +- 3 files changed, 51 insertions(+), 4 deletions(-) diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c index 38b3ea172c..e3d5d8f2e2 100644 --- a/hw/smbios/smbios.c +++ b/hw/smbios/smbios.c @@ -123,7 +123,7 @@ static QTAILQ_HEAD(, type8_instance) type8 = QTAILQ_HEAD_INITIALIZER(type8); /* type 9 instance for parsing */ struct type9_instance { - const char *slot_designation; + const char *slot_designation, *pcidev; uint8_t slot_type, slot_data_bus_width, current_usage, slot_length, slot_characteristics1, slot_characteristics2; uint16_t slot_id; @@ -436,6 +436,11 @@ static const QemuOptDesc qemu_smbios_type9_opts[] = { .type = QEMU_OPT_NUMBER, .help = "slot characteristics2, see the spec", }, + { + .name = "pci_device", + .type = QEMU_OPT_STRING, + .help = "PCI device, if provided." + } }; static const QemuOptDesc qemu_smbios_type11_opts[] = { @@ -866,7 +871,7 @@ static void smbios_build_type_8_table(void) } } -static void smbios_build_type_9_table(void) +static void smbios_build_type_9_table(Error **errp) { unsigned instance = 0; struct type9_instance *t9; @@ -883,6 +888,43 @@ static void smbios_build_type_9_table(void) t->slot_characteristics1 = t9->slot_characteristics1; t->slot_characteristics2 = t9->slot_characteristics2; + if (t9->pcidev) { + PCIDevice *pdev = NULL; + int rc = pci_qdev_find_device(t9->pcidev, &pdev); + if (rc != 0) { + error_setg(errp, + "No PCI device %s for SMBIOS type 9 entry %s", + t9->pcidev, t9->slot_designation); + return; + } + /* + * We only handle the case were the device is attached to + * the PCI root bus. The general case is more complex as + * bridges are enumerated later and the table would need + * to be updated at this moment. + */ + if (!pci_bus_is_root(pci_get_bus(pdev))) { + error_setg(errp, + "Cannot create type 9 entry for PCI device %s: " + "not attached to the root bus", + t9->pcidev); + return; + } + t->segment_group_number = cpu_to_le16(0); + t->bus_number = pci_dev_bus_num(pdev); + t->device_number = pdev->devfn; + } else { + /* + * Per SMBIOS spec, For slots that are not of the PCI, AGP, PCI-X, + * or PCI-Express type that do not have bus/device/function + * information, 0FFh should be populated in the fields of Segment + * Group Number, Bus Number, Device/Function Number. + */ + t->segment_group_number = 0xff; + t->bus_number = 0xff; + t->device_number = 0xff; + } + SMBIOS_BUILD_TABLE_POST; instance++; } @@ -1207,7 +1249,7 @@ void smbios_get_tables(MachineState *ms, } smbios_build_type_8_table(); - smbios_build_type_9_table(); + smbios_build_type_9_table(errp); smbios_build_type_11_table(); #define MAX_DIMM_SZ (16 * GiB) @@ -1556,6 +1598,7 @@ void smbios_entry_add(QemuOpts *opts, Error **errp) t->slot_id = qemu_opt_get_number(opts, "slot_id", 0); t->slot_characteristics1 = qemu_opt_get_number(opts, "slot_characteristics1", 0); t->slot_characteristics2 = qemu_opt_get_number(opts, "slot_characteristics2", 0); + save_opt(&t->pcidev, opts, "pcidev"); QTAILQ_INSERT_TAIL(&type9, t, next); return; } diff --git a/include/hw/firmware/smbios.h b/include/hw/firmware/smbios.h index 9ab114aea2..c21b8d3285 100644 --- a/include/hw/firmware/smbios.h +++ b/include/hw/firmware/smbios.h @@ -222,6 +222,10 @@ struct smbios_type_9 { uint16_t slot_id; uint8_t slot_characteristics1; uint8_t slot_characteristics2; + /* SMBIOS spec v2.6+ */ + uint16_t segment_group_number; + uint8_t bus_number; + uint8_t device_number; } QEMU_PACKED; /* SMBIOS type 11 - OEM strings */ diff --git a/qemu-options.hx b/qemu-options.hx index 7da9235b08..937fd7ed84 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -2718,7 +2718,7 @@ SRST ``-smbios type=4[,sock_pfx=str][,manufacturer=str][,version=str][,serial=str][,asset=str][,part=str][,processor-family=%d][,processor-id=%d]`` Specify SMBIOS type 4 fields -``-smbios type=9[,slot_designation=str][,slot_type=%d][,slot_data_bus_width=%d][,current_usage=%d][,slot_length=%d][,slot_id=%d][,slot_characteristics1=%d][,slot_characteristics12=%d]`` +``-smbios type=9[,slot_designation=str][,slot_type=%d][,slot_data_bus_width=%d][,current_usage=%d][,slot_length=%d][,slot_id=%d][,slot_characteristics1=%d][,slot_characteristics12=%d][,pci_device=str]`` Specify SMBIOS type 9 fields ``-smbios type=11[,value=str][,path=filename]``