From: Oliver Steffen Date: Fri, 30 Jan 2026 05:47:10 +0000 (+0100) Subject: igvm: Add common function for finding parameter entries X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4113ac8c4175df37ea66890db7292e43bb012bb5;p=thirdparty%2Fqemu.git igvm: Add common function for finding parameter entries Move repeating code for finding the parameter entries in the IGVM backend out of the parameter handlers into a common function. A warning message is emitted in case a no parameter entry can be found for a given index. Reviewed-by: Luigi Leonardi Signed-off-by: Oliver Steffen Message-ID: <20260130054714.715928-6-osteffen@redhat.com> Signed-off-by: Gerd Hoffmann --- diff --git a/backends/igvm.c b/backends/igvm.c index 3a3832dc2d..ea3f9d6b00 100644 --- a/backends/igvm.c +++ b/backends/igvm.c @@ -12,6 +12,7 @@ #include "qemu/osdep.h" #include "qapi/error.h" +#include "qemu/error-report.h" #include "qemu/target-info-qapi.h" #include "system/igvm.h" #include "system/igvm-cfg.h" @@ -60,6 +61,20 @@ struct QEMU_PACKED sev_id_authentication { #define IGVM_SEV_ID_BLOCK_VERSION 1 +QIgvmParameterData* +qigvm_find_param_entry(QIgvm *igvm, uint32_t parameter_area_index) +{ + QIgvmParameterData *param_entry; + QTAILQ_FOREACH(param_entry, &igvm->parameter_data, next) + { + if (param_entry->index == parameter_area_index) { + return param_entry; + } + } + warn_report("IGVM: No parameter area for index %u", parameter_area_index); + return NULL; +} + static int qigvm_directive_page_data(QIgvm *ctx, const uint8_t *header_data, Error **errp); static int qigvm_directive_vp_context(QIgvm *ctx, const uint8_t *header_data, @@ -534,58 +549,54 @@ static int qigvm_directive_memory_map(QIgvm *ctx, const uint8_t *header_data, } /* Find the parameter area that should hold the memory map */ - QTAILQ_FOREACH(param_entry, &ctx->parameter_data, next) - { - if (param_entry->index == param->parameter_area_index) { - max_entry_count = - param_entry->size / sizeof(IGVM_VHS_MEMORY_MAP_ENTRY); - mm_entry = (IGVM_VHS_MEMORY_MAP_ENTRY *)param_entry->data; - - retval = get_mem_map_entry(entry, &cgmm_entry, errp); - while (retval == 0) { - if (entry >= max_entry_count) { - error_setg( - errp, - "IGVM: guest memory map size exceeds parameter area defined in IGVM file"); - return -1; - } - mm_entry[entry].starting_gpa_page_number = cgmm_entry.gpa >> 12; - mm_entry[entry].number_of_pages = cgmm_entry.size >> 12; - - switch (cgmm_entry.type) { - case CGS_MEM_RAM: - mm_entry[entry].entry_type = - IGVM_MEMORY_MAP_ENTRY_TYPE_MEMORY; - break; - case CGS_MEM_RESERVED: - mm_entry[entry].entry_type = - IGVM_MEMORY_MAP_ENTRY_TYPE_PLATFORM_RESERVED; - break; - case CGS_MEM_ACPI: - mm_entry[entry].entry_type = - IGVM_MEMORY_MAP_ENTRY_TYPE_PLATFORM_RESERVED; - break; - case CGS_MEM_NVS: - mm_entry[entry].entry_type = - IGVM_MEMORY_MAP_ENTRY_TYPE_PERSISTENT; - break; - case CGS_MEM_UNUSABLE: - mm_entry[entry].entry_type = - IGVM_MEMORY_MAP_ENTRY_TYPE_PLATFORM_RESERVED; - break; - } - retval = get_mem_map_entry(++entry, &cgmm_entry, errp); - } - if (retval < 0) { - return retval; - } - /* The entries need to be sorted */ - qsort(mm_entry, entry, sizeof(IGVM_VHS_MEMORY_MAP_ENTRY), - qigvm_cmp_mm_entry); + param_entry = qigvm_find_param_entry(ctx, param->parameter_area_index); + if (param_entry == NULL) { + return 0; + } + + max_entry_count = param_entry->size / sizeof(IGVM_VHS_MEMORY_MAP_ENTRY); + mm_entry = (IGVM_VHS_MEMORY_MAP_ENTRY *)param_entry->data; + + retval = get_mem_map_entry(entry, &cgmm_entry, errp); + while (retval == 0) { + if (entry >= max_entry_count) { + error_setg( + errp, + "IGVM: guest memory map size exceeds parameter area defined " + "in IGVM file"); + return -1; + } + mm_entry[entry].starting_gpa_page_number = cgmm_entry.gpa >> 12; + mm_entry[entry].number_of_pages = cgmm_entry.size >> 12; + switch (cgmm_entry.type) { + case CGS_MEM_RAM: + mm_entry[entry].entry_type = IGVM_MEMORY_MAP_ENTRY_TYPE_MEMORY; + break; + case CGS_MEM_RESERVED: + mm_entry[entry].entry_type = + IGVM_MEMORY_MAP_ENTRY_TYPE_PLATFORM_RESERVED; + break; + case CGS_MEM_ACPI: + mm_entry[entry].entry_type = + IGVM_MEMORY_MAP_ENTRY_TYPE_PLATFORM_RESERVED; + break; + case CGS_MEM_NVS: + mm_entry[entry].entry_type = IGVM_MEMORY_MAP_ENTRY_TYPE_PERSISTENT; + break; + case CGS_MEM_UNUSABLE: + mm_entry[entry].entry_type = + IGVM_MEMORY_MAP_ENTRY_TYPE_PLATFORM_RESERVED; break; } + retval = get_mem_map_entry(++entry, &cgmm_entry, errp); + } + if (retval < 0) { + return retval; } + /* The entries need to be sorted */ + qsort(mm_entry, entry, sizeof(IGVM_VHS_MEMORY_MAP_ENTRY), + qigvm_cmp_mm_entry); return 0; } @@ -597,18 +608,18 @@ static int qigvm_directive_vp_count(QIgvm *ctx, const uint8_t *header_data, uint32_t *vp_count; CPUState *cpu; - QTAILQ_FOREACH(param_entry, &ctx->parameter_data, next) + param_entry = qigvm_find_param_entry(ctx, param->parameter_area_index); + if (param_entry == NULL) { + return 0; + } + + vp_count = (uint32_t *)(param_entry->data + param->byte_offset); + *vp_count = 0; + CPU_FOREACH(cpu) { - if (param_entry->index == param->parameter_area_index) { - vp_count = (uint32_t *)(param_entry->data + param->byte_offset); - *vp_count = 0; - CPU_FOREACH(cpu) - { - (*vp_count)++; - } - break; - } + (*vp_count)++; } + return 0; } @@ -620,15 +631,15 @@ static int qigvm_directive_environment_info(QIgvm *ctx, QIgvmParameterData *param_entry; IgvmEnvironmentInfo *environmental_state; - QTAILQ_FOREACH(param_entry, &ctx->parameter_data, next) - { - if (param_entry->index == param->parameter_area_index) { - environmental_state = - (IgvmEnvironmentInfo *)(param_entry->data + param->byte_offset); - environmental_state->memory_is_shared = 1; - break; - } + param_entry = qigvm_find_param_entry(ctx, param->parameter_area_index); + if (param_entry == NULL) { + return 0; } + + environmental_state = + (IgvmEnvironmentInfo *)(param_entry->data + param->byte_offset); + environmental_state->memory_is_shared = 1; + return 0; } diff --git a/include/system/igvm-internal.h b/include/system/igvm-internal.h index 9c8e887d6f..019f95e866 100644 --- a/include/system/igvm-internal.h +++ b/include/system/igvm-internal.h @@ -70,4 +70,7 @@ typedef struct QIgvm { IgvmHandle qigvm_file_init(char *filename, Error **errp); +QIgvmParameterData* +qigvm_find_param_entry(QIgvm *igvm, uint32_t parameter_area_index); + #endif