From 86a15a258283850ec5563e2a66bf389aa2dfa318 Mon Sep 17 00:00:00 2001 From: Daniel Hansel Date: Thu, 20 Nov 2014 11:08:21 +0100 Subject: [PATCH] cpu-driver: Fix the cross driver function call For Intel and PowerPC the implementation is calling a cpu driver function across driver layers (i.e. from qemu driver directly to cpu driver). The correct behavior is to use libvirt API functionality to perform such a inter-driver call. This patch introduces a new cpu driver API function getModels() to retrieve the cpu models. The currect implementation to process the cpu_map XML content is transferred to the INTEL and PowerPC cpu driver specific API functions. Additionally processing the cpu_map XML file is not safe due to the fact that the cpu map does not exist for all architectures. Therefore it is better to encapsulate the processing in the architecture specific cpu drivers. Signed-off-by: Daniel Hansel Reviewed-by: Boris Fiuczynski Reviewed-by: Viktor Mihajlovski --- src/cpu/cpu.c | 68 ++++++++----------------------------------- src/cpu/cpu.h | 4 +++ src/cpu/cpu_powerpc.c | 37 +++++++++++++++++++++++ src/cpu/cpu_x86.c | 33 +++++++++++++++++++++ 4 files changed, 86 insertions(+), 56 deletions(-) diff --git a/src/cpu/cpu.c b/src/cpu/cpu.c index 08bec5e56a..788f68873d 100644 --- a/src/cpu/cpu.c +++ b/src/cpu/cpu.c @@ -724,43 +724,6 @@ cpuModelIsAllowed(const char *model, return false; } -struct cpuGetModelsData -{ - char **data; - size_t len; /* It includes the last element of DATA, which is NULL. */ -}; - -static int -cpuGetArchModelsCb(cpuMapElement element, - xmlXPathContextPtr ctxt, - void *cbdata) -{ - char *name; - struct cpuGetModelsData *data = cbdata; - if (element != CPU_MAP_ELEMENT_MODEL) - return 0; - - name = virXPathString("string(@name)", ctxt); - if (name == NULL) - return -1; - - if (!data->data) { - VIR_FREE(name); - data->len++; - return 0; - } - - return VIR_INSERT_ELEMENT(data->data, data->len - 1, data->len, name); -} - - -static int -cpuGetArchModels(const char *arch, struct cpuGetModelsData *data) -{ - return cpuMapLoad(arch, cpuGetArchModelsCb, data); -} - - /** * cpuGetModels: * @@ -774,18 +737,17 @@ cpuGetArchModels(const char *arch, struct cpuGetModelsData *data) int cpuGetModels(const char *archName, char ***models) { - struct cpuGetModelsData data; - virArch arch; struct cpuArchDriver *driver; - data.data = NULL; - data.len = 1; + virArch arch; + + VIR_DEBUG("arch=%s", archName); arch = virArchFromString(archName); if (arch == VIR_ARCH_NONE) { virReportError(VIR_ERR_INVALID_ARG, _("cannot find architecture %s"), archName); - goto error; + return -1; } driver = cpuGetSubDriver(arch); @@ -793,21 +755,15 @@ cpuGetModels(const char *archName, char ***models) virReportError(VIR_ERR_INVALID_ARG, _("cannot find a driver for the architecture %s"), archName); - goto error; + return -1; } - if (models && VIR_ALLOC_N(data.data, data.len) < 0) - goto error; - - if (cpuGetArchModels(driver->name, &data) < 0) - goto error; - - if (models) - *models = data.data; - - return data.len - 1; + if (!driver->getModels) { + virReportError(VIR_ERR_NO_SUPPORT, + _("CPU driver for %s has no CPU model support"), + virArchToString(arch)); + return -1; + } - error: - virStringFreeList(data.data); - return -1; + return driver->getModels(models); } diff --git a/src/cpu/cpu.h b/src/cpu/cpu.h index 339964ce3a..09e953829f 100644 --- a/src/cpu/cpu.h +++ b/src/cpu/cpu.h @@ -100,6 +100,9 @@ typedef char * typedef virCPUDataPtr (*cpuArchDataParse) (const char *xmlStr); +typedef int +(*cpuArchGetModels) (char ***models); + struct cpuArchDriver { const char *name; const virArch *arch; @@ -115,6 +118,7 @@ struct cpuArchDriver { cpuArchHasFeature hasFeature; cpuArchDataFormat dataFormat; cpuArchDataParse dataParse; + cpuArchGetModels getModels; }; diff --git a/src/cpu/cpu_powerpc.c b/src/cpu/cpu_powerpc.c index 531868caef..871401b017 100644 --- a/src/cpu/cpu_powerpc.c +++ b/src/cpu/cpu_powerpc.c @@ -650,6 +650,42 @@ ppcBaseline(virCPUDefPtr *cpus, goto cleanup; } +static int +ppcGetModels(char ***models) +{ + struct ppc_map *map; + struct ppc_model *model; + char *name; + size_t nmodels = 0; + + if (!(map = ppcLoadMap())) + goto error; + + if (models && VIR_ALLOC_N(*models, 0) < 0) + goto error; + + model = map->models; + while (model != NULL) { + if (VIR_STRDUP(name, model->name) < 0) + goto error; + + if (VIR_INSERT_ELEMENT(*models, 0, nmodels, name) < 0) + goto error; + + model = model->next; + } + + cleanup: + ppcMapFree(map); + + return nmodels; + + error: + virStringFreeList(*models); + nmodels = -1; + goto cleanup; +} + struct cpuArchDriver cpuDriverPowerPC = { .name = "ppc64", .arch = archs, @@ -663,4 +699,5 @@ struct cpuArchDriver cpuDriverPowerPC = { .baseline = ppcBaseline, .update = ppcUpdate, .hasFeature = NULL, + .getModels = ppcGetModels, }; diff --git a/src/cpu/cpu_x86.c b/src/cpu/cpu_x86.c index 026b54e0d4..f6dcba41d0 100644 --- a/src/cpu/cpu_x86.c +++ b/src/cpu/cpu_x86.c @@ -2160,6 +2160,38 @@ x86HasFeature(const virCPUData *data, return ret; } +static int +x86GetModels(char ***models) +{ + const struct x86_map *map; + struct x86_model *model; + char *name; + size_t nmodels = 0; + + if (!(map = virCPUx86GetMap())) + return -1; + + if (models && VIR_ALLOC_N(*models, 0) < 0) + goto error; + + model = map->models; + while (model != NULL) { + if (VIR_STRDUP(name, model->name) < 0) + goto error; + + if (VIR_INSERT_ELEMENT(*models, 0, nmodels, name) < 0) + goto error; + + model = model->next; + } + + return nmodels; + + error: + virStringFreeList(*models); + return -1; +} + struct cpuArchDriver cpuDriverX86 = { .name = "x86", @@ -2180,4 +2212,5 @@ struct cpuArchDriver cpuDriverX86 = { .hasFeature = x86HasFeature, .dataFormat = x86CPUDataFormat, .dataParse = x86CPUDataParse, + .getModels = x86GetModels, }; -- GitLab