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Thu, 09 Oct 2025 00:51:28 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFuKEhRlcHDyUNZBk8Ba7Kh4nkdjuEb3sxsQGHMtqJXZJgKXBD4e7miOQaZD/nsjWlgQvKPnA== X-Received: by 2002:a05:600c:6a07:b0:46e:74bb:6bd with SMTP id 5b1f17b1804b1-46fa2952c89mr55071985e9.4.1759996288058; Thu, 09 Oct 2025 00:51:28 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Magnus Kulke Subject: [PULL 27/35] target/i386/mshv: Write MSRs to the hypervisor Date: Thu, 9 Oct 2025 09:50:17 +0200 Message-ID: <20251009075026.505715-28-pbonzini@redhat.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251009075026.505715-1-pbonzini@redhat.com> References: <20251009075026.505715-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.442, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1759996455256154100 Content-Type: text/plain; charset="utf-8" From: Magnus Kulke Push current model-specific register (MSR) values to MSHV's vCPUs as part of setting state to the hypervisor. Signed-off-by: Magnus Kulke Link: https://lore.kernel.org/r/20250916164847.77883-22-magnuskulke@linux.m= icrosoft.com Signed-off-by: Paolo Bonzini --- target/i386/mshv/mshv-cpu.c | 68 +++++++++++++++++++++++++++++++++++-- 1 file changed, 66 insertions(+), 2 deletions(-) diff --git a/target/i386/mshv/mshv-cpu.c b/target/i386/mshv/mshv-cpu.c index 424ebdb1228..33a3ce8b110 100644 --- a/target/i386/mshv/mshv-cpu.c +++ b/target/i386/mshv/mshv-cpu.c @@ -998,6 +998,65 @@ static int put_regs(const CPUState *cpu) return 0; } =20 +struct MsrPair { + uint32_t index; + uint64_t value; +}; + +static int put_msrs(const CPUState *cpu) +{ + int ret =3D 0; + X86CPU *x86cpu =3D X86_CPU(cpu); + CPUX86State *env =3D &x86cpu->env; + MshvMsrEntries *msrs =3D g_malloc0(sizeof(MshvMsrEntries)); + + struct MsrPair pairs[] =3D { + { MSR_IA32_SYSENTER_CS, env->sysenter_cs }, + { MSR_IA32_SYSENTER_ESP, env->sysenter_esp }, + { MSR_IA32_SYSENTER_EIP, env->sysenter_eip }, + { MSR_EFER, env->efer }, + { MSR_PAT, env->pat }, + { MSR_STAR, env->star }, + { MSR_CSTAR, env->cstar }, + { MSR_LSTAR, env->lstar }, + { MSR_KERNELGSBASE, env->kernelgsbase }, + { MSR_FMASK, env->fmask }, + { MSR_MTRRdefType, env->mtrr_deftype }, + { MSR_VM_HSAVE_PA, env->vm_hsave }, + { MSR_SMI_COUNT, env->msr_smi_count }, + { MSR_IA32_PKRS, env->pkrs }, + { MSR_IA32_BNDCFGS, env->msr_bndcfgs }, + { MSR_IA32_XSS, env->xss }, + { MSR_IA32_UMWAIT_CONTROL, env->umwait }, + { MSR_IA32_TSX_CTRL, env->tsx_ctrl }, + { MSR_AMD64_TSC_RATIO, env->amd_tsc_scale_msr }, + { MSR_TSC_AUX, env->tsc_aux }, + { MSR_TSC_ADJUST, env->tsc_adjust }, + { MSR_IA32_SMBASE, env->smbase }, + { MSR_IA32_SPEC_CTRL, env->spec_ctrl }, + { MSR_VIRT_SSBD, env->virt_ssbd }, + }; + + if (ARRAY_SIZE(pairs) > MSHV_MSR_ENTRIES_COUNT) { + error_report("MSR entries exceed maximum size"); + g_free(msrs); + return -1; + } + + for (size_t i =3D 0; i < ARRAY_SIZE(pairs); i++) { + MshvMsrEntry *entry =3D &msrs->entries[i]; + entry->index =3D pairs[i].index; + entry->reserved =3D 0; + entry->data =3D pairs[i].value; + msrs->nmsrs++; + } + + ret =3D mshv_configure_msr(cpu, &msrs->entries[0], msrs->nmsrs); + g_free(msrs); + return ret; +} + + int mshv_arch_put_registers(const CPUState *cpu) { int ret; @@ -1008,8 +1067,13 @@ int mshv_arch_put_registers(const CPUState *cpu) return -1; } =20 - error_report("unimplemented"); - abort(); + ret =3D put_msrs(cpu); + if (ret < 0) { + error_report("Failed to put msrs"); + return -1; + } + + return 0; } =20 void mshv_arch_amend_proc_features( --=20 2.51.0