From bbb2d260e6f33380b9df28c74421055bd8dccda5 Mon Sep 17 00:00:00 2001 From: Igor Mammedov Date: Mon, 26 Feb 2024 12:59:33 +0100 Subject: [PATCH 19/20] smbios: error out when building type 4 table is not possible RH-Author: Igor Mammedov RH-MergeRequest: 230: Workaround Windows failing to find 64bit SMBIOS entry point with SeaBIOS RH-Jira: RHEL-21705 RH-Acked-by: MST RH-Acked-by: Ani Sinha RH-Commit: [17/18] 86b1c67bfbe9c0c14a190cd1204b6ccd1de1630f JIRA: https://issues.redhat.com/browse/RHEL-21705 If SMBIOS v2 version is requested but number of cores/threads are more than it's possible to describe with v2, error out instead of silently ignoring the fact and filling core/thread count with bogus values. This will help caller to decide if it should fallback to SMBIOSv3 when smbios-entry-point-type='auto' Signed-off-by: Igor Mammedov Reviewed-by: Ani Sinha Tested-by: Fiona Ebner --- hw/smbios/smbios.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c index 3d9dcb0d31..637aa952f5 100644 --- a/hw/smbios/smbios.c +++ b/hw/smbios/smbios.c @@ -655,7 +655,8 @@ static void smbios_build_type_3_table(void) } static void smbios_build_type_4_table(MachineState *ms, unsigned instance, - SmbiosEntryPointType ep_type) + SmbiosEntryPointType ep_type, + Error **errp) { char sock_str[128]; size_t tbl_len = SMBIOS_TYPE_4_LEN_V28; @@ -709,6 +710,12 @@ static void smbios_build_type_4_table(MachineState *ms, unsigned instance, if (tbl_len == SMBIOS_TYPE_4_LEN_V30) { t->core_count2 = t->core_enabled2 = cpu_to_le16(cores_per_socket); t->thread_count2 = cpu_to_le16(threads_per_socket); + } else if (t->core_count == 0xFF || t->thread_count == 0xFF) { + error_setg(errp, "SMBIOS 2.0 doesn't support number of processor " + "cores/threads more than 255, use " + "-machine smbios-entry-point-type=64 option to enable " + "SMBIOS 3.0 support"); + return; } SMBIOS_BUILD_TABLE_POST; @@ -1126,7 +1133,10 @@ static bool smbios_get_tables_ep(MachineState *ms, assert(ms->smp.sockets >= 1); for (i = 0; i < ms->smp.sockets; i++) { - smbios_build_type_4_table(ms, i, ep_type); + smbios_build_type_4_table(ms, i, ep_type, errp); + if (*errp) { + goto err_exit; + } } smbios_build_type_8_table(); -- 2.39.3