From b4bc2a799e6e305dc0595a29aae68a39a5983dee Mon Sep 17 00:00:00 2001 Message-Id: From: Jiri Denemark Date: Mon, 4 Mar 2019 16:36:33 +0100 Subject: [PATCH] cpu_x86: Store CPU signature in an array MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In preparation for storing several CPU signatures in a single CPU model, we need to turn virCPUx86Model's signature into an array of signatures. The parser still hardcodes the number of signatures to 1, but the following patch will drop this limit. Signed-off-by: Jiri Denemark Reviewed-by: Ján Tomko (cherry picked from commit b07b8b7750c6a505d4b00bd272e79ea0305cb610) https://bugzilla.redhat.com/show_bug.cgi?id=1558558 https://bugzilla.redhat.com/show_bug.cgi?id=1687515 Signed-off-by: Jiri Denemark Reviewed-by: Ján Tomko --- src/cpu/cpu_x86.c | 50 ++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 41 insertions(+), 9 deletions(-) diff --git a/src/cpu/cpu_x86.c b/src/cpu/cpu_x86.c index e54a3986a1..543533148f 100644 --- a/src/cpu/cpu_x86.c +++ b/src/cpu/cpu_x86.c @@ -136,7 +136,8 @@ typedef virCPUx86Model *virCPUx86ModelPtr; struct _virCPUx86Model { char *name; virCPUx86VendorPtr vendor; - uint32_t signature; + size_t nsignatures; + uint32_t *signatures; virCPUx86Data data; }; @@ -1008,6 +1009,7 @@ x86ModelFree(virCPUx86ModelPtr model) return; VIR_FREE(model->name); + VIR_FREE(model->signatures); virCPUx86DataClear(&model->data); VIR_FREE(model); } @@ -1017,7 +1019,14 @@ static int x86ModelCopySignatures(virCPUx86ModelPtr dst, virCPUx86ModelPtr src) { - dst->signature = src->signature; + size_t i; + + if (VIR_ALLOC_N(dst->signatures, src->nsignatures) < 0) + return -1; + + dst->nsignatures = src->nsignatures; + for (i = 0; i < src->nsignatures; i++) + dst->signatures[i] = src->signatures[i]; return 0; } @@ -1198,12 +1207,18 @@ static int x86ModelParseSignature(virCPUx86ModelPtr model, xmlXPathContextPtr ctxt) { + /* Remove inherited signatures. */ + VIR_FREE(model->signatures); if (virXPathBoolean("boolean(./signature)", ctxt)) { unsigned int sigFamily = 0; unsigned int sigModel = 0; int rc; + model->nsignatures = 1; + if (VIR_ALLOC_N(model->signatures, 1) < 0) + return -1; + rc = virXPathUInt("string(./signature/@family)", ctxt, &sigFamily); if (rc < 0 || sigFamily == 0) { virReportError(VIR_ERR_INTERNAL_ERROR, @@ -1220,7 +1235,7 @@ x86ModelParseSignature(virCPUx86ModelPtr model, return -1; } - model->signature = x86MakeSignature(sigFamily, sigModel, 0); + model->signatures[0] = x86MakeSignature(sigFamily, sigModel, 0); } return 0; @@ -1665,7 +1680,8 @@ x86Compute(virCPUDefPtr host, &host_model->vendor->cpuid) < 0) goto error; - if (x86DataAddSignature(&guest_model->data, host_model->signature) < 0) + if (host_model->signatures && + x86DataAddSignature(&guest_model->data, *host_model->signatures) < 0) goto error; if (cpu->type == VIR_CPU_TYPE_GUEST @@ -1771,6 +1787,21 @@ virCPUx86Compare(virCPUDefPtr host, } +static bool +x86ModelHasSignature(virCPUx86ModelPtr model, + uint32_t signature) +{ + size_t i; + + for (i = 0; i < model->nsignatures; i++) { + if (model->signatures[i] == signature) + return true; + } + + return false; +} + + /* * Checks whether a candidate model is a better fit for the CPU data than the * current model. @@ -1812,8 +1843,8 @@ x86DecodeUseCandidate(virCPUx86ModelPtr current, * consider candidates with matching family/model. */ if (signature && - current->signature == signature && - candidate->signature != signature) { + x86ModelHasSignature(current, signature) && + !x86ModelHasSignature(candidate, signature)) { VIR_DEBUG("%s differs in signature from matching %s", cpuCandidate->model, cpuCurrent->model); return 0; @@ -1829,8 +1860,8 @@ x86DecodeUseCandidate(virCPUx86ModelPtr current, * result in longer list of features. */ if (signature && - candidate->signature == signature && - current->signature != signature) { + x86ModelHasSignature(candidate, signature) && + !x86ModelHasSignature(current, signature)) { VIR_DEBUG("%s provides matching signature", cpuCandidate->model); return 1; } @@ -2898,7 +2929,8 @@ virCPUx86Translate(virCPUDefPtr cpu, virCPUx86DataAddCPUIDInt(&model->data, &model->vendor->cpuid) < 0) goto cleanup; - if (x86DataAddSignature(&model->data, model->signature) < 0) + if (model->signatures && + x86DataAddSignature(&model->data, model->signatures[0]) < 0) goto cleanup; if (!(translated = virCPUDefCopyWithoutModel(cpu))) -- 2.21.0