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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::329; envelope-from=laramglazier@gmail.com; helo=mail-wm1-x329.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) Content-Type: text/plain; charset="utf-8" The combination of unset CD and set NW bit in CR0 is illegal. CR0[63:32] are also reserved and need to be zero. (AMD64 Architecture Programmer's Manual, V2, 15.5) Signed-off-by: Lara Lazier --- target/i386/cpu.h | 2 ++ target/i386/svm.h | 1 + target/i386/tcg/sysemu/svm_helper.c | 12 +++++++++--- 3 files changed, 12 insertions(+), 3 deletions(-) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index ac3abea97c..46542513cc 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -224,6 +224,8 @@ typedef enum X86Seg { #define CR0_NE_MASK (1U << 5) #define CR0_WP_MASK (1U << 16) #define CR0_AM_MASK (1U << 18) +#define CR0_NW_MASK (1U << 29) +#define CR0_CD_MASK (1U << 30) #define CR0_PG_MASK (1U << 31) =20 #define CR4_VME_MASK (1U << 0) diff --git a/target/i386/svm.h b/target/i386/svm.h index 1c55d4f829..7a88906907 100644 --- a/target/i386/svm.h +++ b/target/i386/svm.h @@ -136,6 +136,7 @@ #define SVM_NPTEXIT_GPT (1ULL << 33) =20 #define SVM_VMRUN_INTERCEPT (1ULL << 32) +#define SVM_CR0_RESERVED_MASK 0xffffffff00000000U =20 struct QEMU_PACKED vmcb_control_area { uint16_t intercept_cr_read; diff --git a/target/i386/tcg/sysemu/svm_helper.c b/target/i386/tcg/sysemu/s= vm_helper.c index ff826fe11a..63aaa53490 100644 --- a/target/i386/tcg/sysemu/svm_helper.c +++ b/target/i386/tcg/sysemu/svm_helper.c @@ -73,6 +73,7 @@ void helper_vmrun(CPUX86State *env, int aflag, int next_e= ip_addend) uint32_t event_inj; uint32_t int_ctl; uint32_t asid; + uint64_t new_cr0; =20 cpu_svm_check_intercept_param(env, SVM_EXIT_VMRUN, 0, GETPC()); =20 @@ -192,13 +193,18 @@ void helper_vmrun(CPUX86State *env, int aflag, int ne= xt_eip_addend) env->idt.limit =3D x86_ldl_phys(cs, env->vm_vmcb + offsetof(struct vmc= b, save.idtr.limit)); =20 + new_cr0 =3D x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, save= .cr0)); + if (new_cr0 & SVM_CR0_RESERVED_MASK) { + cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); + } + if ((new_cr0 & CR0_NW_MASK) && !(new_cr0 & CR0_CD_MASK)) { + cpu_vmexit(env, SVM_EXIT_ERR, 0, GETPC()); + } /* clear exit_info_2 so we behave like the real hardware */ x86_stq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.exit_info_2), 0); =20 - cpu_x86_update_cr0(env, x86_ldq_phys(cs, - env->vm_vmcb + offsetof(struct vmcb, - save.cr0))); + cpu_x86_update_cr0(env, new_cr0); cpu_x86_update_cr4(env, x86_ldq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, save.cr4))); --=20 2.25.1