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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::532; envelope-from=laramglazier@gmail.com; helo=mail-ed1-x532.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lara Lazier Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1627039775176100001 Content-Type: text/plain; charset="utf-8" All MBZ in CR3 must be zero (APM2 15.5) Added checks in both helper_vmrun and helper_write_crN. When EFER.LMA is zero the upper 32 bits needs to be zeroed. Signed-off-by: Lara Lazier --- target/i386/tcg/sysemu/misc_helper.c | 7 +++++++ target/i386/tcg/sysemu/svm_helper.c | 10 +++++++--- 2 files changed, 14 insertions(+), 3 deletions(-) diff --git a/target/i386/tcg/sysemu/misc_helper.c b/target/i386/tcg/sysemu/= misc_helper.c index a2af2c9bba..d347af2a99 100644 --- a/target/i386/tcg/sysemu/misc_helper.c +++ b/target/i386/tcg/sysemu/misc_helper.c @@ -96,6 +96,13 @@ void helper_write_crN(CPUX86State *env, int reg, target_= ulong t0) cpu_x86_update_cr0(env, t0); break; case 3: + if ((env->efer & MSR_EFER_LMA) && + (t0 & ((~0UL) << env_archcpu(env)->phys_bits))) { + cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); + } + if (!(env->efer & MSR_EFER_LMA)) { + t0 &=3D 0xffffffffUL; + } cpu_x86_update_cr3(env, t0); break; case 4: diff --git a/target/i386/tcg/sysemu/svm_helper.c b/target/i386/tcg/sysemu/s= vm_helper.c index 37dbe8e434..8b1ba53c64 100644 --- a/target/i386/tcg/sysemu/svm_helper.c +++ b/target/i386/tcg/sysemu/svm_helper.c @@ -111,6 +111,7 @@ void helper_vmrun(CPUX86State *env, int aflag, int next= _eip_addend) uint32_t int_ctl; uint32_t asid; uint64_t new_cr0; + uint64_t new_cr3; uint64_t new_cr4; =20 cpu_svm_check_intercept_param(env, SVM_EXIT_VMRUN, 0, GETPC()); @@ -252,6 +253,11 @@ void helper_vmrun(CPUX86State *env, int aflag, int nex= t_eip_addend) if ((new_cr0 & CR0_NW_MASK) && !(new_cr0 & CR0_CD_MASK)) { cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); } + new_cr3 =3D x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, save= .cr3)); + if ((env->efer & MSR_EFER_LMA) && + (new_cr3 & ((~0UL) << cpu->phys_bits))) { + cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); + } new_cr4 =3D x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, save= .cr4)); if (new_cr4 & cr4_reserved_bits(env)) { cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); @@ -262,9 +268,7 @@ void helper_vmrun(CPUX86State *env, int aflag, int next= _eip_addend) =20 cpu_x86_update_cr0(env, new_cr0); cpu_x86_update_cr4(env, new_cr4); - cpu_x86_update_cr3(env, x86_ldq_phys(cs, - env->vm_vmcb + offsetof(struct vmcb, - save.cr3))); + cpu_x86_update_cr3(env, new_cr3); env->cr[2] =3D x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, save.cr2)); int_ctl =3D x86_ldl_phys(cs, --=20 2.25.1