From 5ed7948213af8cba0c6153611aa0aea55069bac2 Mon Sep 17 00:00:00 2001 From: Igor Mammedov Date: Thu, 14 Mar 2024 16:22:58 +0100 Subject: [PATCH] smbios: error out when building type 4 table is not possible 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 Message-Id: <20240314152302.2324164-18-imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- 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 b0467347c5..eed5787b15 100644 --- a/hw/smbios/smbios.c +++ b/hw/smbios/smbios.c @@ -669,7 +669,8 @@ 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; @@ -723,6 +724,12 @@ 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; @@ -1111,7 +1118,10 @@ 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();