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bh=wlKHFHC0Q0JoUnvY6Xg/B0UUnONgzKq6R19/MfSXZJg=; b=blqtNE7CFaL+x5mFH3Yuze6I7+GbJxPdoIW8vhCRlsdOAk6YQUcsDm0Ma/BHY/KxHKzS8f DWKxgKix6NoVBe5tbvtk/HwFjUbWt2o9SV8Jn4+emQcqMzEazp/lhHNZC1FJGwq2JrrYTJ YEqBOhBA8NBqepbWsEQKX/2Q0pQ8Jhw= X-MC-Unique: v16nf2eiNC-I8tB4kvN7iA-1 From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PATCH 3/3] target/i386: svm: do not discard high 32 bits of EXITINFO1 Date: Thu, 18 Mar 2021 11:00:22 -0400 Message-Id: <20210318150022.1824646-4-pbonzini@redhat.com> In-Reply-To: <20210318150022.1824646-1-pbonzini@redhat.com> References: <20210318150022.1824646-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com 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=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.249, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Type: text/plain; charset="utf-8" env->error_code is only 32-bits wide, so the high 32 bits of EXITINFO1 are being lost. However, even though saving guest state and restoring host state must be delayed to do_vmexit, because they might take tb_lock, it is always possible to write to the VMCB. So do this for the exit code and EXITINFO1, just like it is already being done for EXITINFO2. Signed-off-by: Paolo Bonzini --- target/i386/tcg/helper-tcg.h | 2 +- target/i386/tcg/seg_helper.c | 4 ++-- target/i386/tcg/svm_helper.c | 15 +++++++-------- 3 files changed, 10 insertions(+), 11 deletions(-) diff --git a/target/i386/tcg/helper-tcg.h b/target/i386/tcg/helper-tcg.h index ef60e2e04b..bcdfca06f6 100644 --- a/target/i386/tcg/helper-tcg.h +++ b/target/i386/tcg/helper-tcg.h @@ -80,7 +80,7 @@ void cpu_load_eflags(CPUX86State *env, int eflags, int up= date_mask); /* svm_helper.c */ void QEMU_NORETURN cpu_vmexit(CPUX86State *nenv, uint32_t exit_code, uint64_t exit_info_1, uintptr_t retaddr); -void do_vmexit(CPUX86State *env, uint32_t exit_code, uint64_t exit_info_1); +void do_vmexit(CPUX86State *env); =20 /* seg_helper.c */ void do_interrupt_x86_hardirq(CPUX86State *env, int intno, int is_hw); diff --git a/target/i386/tcg/seg_helper.c b/target/i386/tcg/seg_helper.c index 180d47f0e9..d180a381d1 100644 --- a/target/i386/tcg/seg_helper.c +++ b/target/i386/tcg/seg_helper.c @@ -1305,9 +1305,9 @@ void x86_cpu_do_interrupt(CPUState *cs) /* successfully delivered */ env->old_exception =3D -1; #else - if (cs->exception_index >=3D EXCP_VMEXIT) { + if (cs->exception_index =3D=3D EXCP_VMEXIT) { assert(env->old_exception =3D=3D -1); - do_vmexit(env, cs->exception_index - EXCP_VMEXIT, env->error_code); + do_vmexit(env); } else { do_interrupt_all(cpu, cs->exception_index, env->exception_is_int, diff --git a/target/i386/tcg/svm_helper.c b/target/i386/tcg/svm_helper.c index 097bb9b83d..0145afceae 100644 --- a/target/i386/tcg/svm_helper.c +++ b/target/i386/tcg/svm_helper.c @@ -621,15 +621,19 @@ void cpu_vmexit(CPUX86State *env, uint32_t exit_code,= uint64_t exit_info_1, control.exit_info_2)), env->eip); =20 - cs->exception_index =3D EXCP_VMEXIT + exit_code; - env->error_code =3D exit_info_1; + cs->exception_index =3D EXCP_VMEXIT; + x86_stq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.exit_cod= e), + exit_code); + + x86_stq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, + control.exit_info_1), exit_in= fo_1), =20 /* remove any pending exception */ env->old_exception =3D -1; cpu_loop_exit(cs); } =20 -void do_vmexit(CPUX86State *env, uint32_t exit_code, uint64_t exit_info_1) +void do_vmexit(CPUX86State *env) { CPUState *cs =3D env_cpu(env); uint32_t int_ctl; @@ -762,11 +766,6 @@ void do_vmexit(CPUX86State *env, uint32_t exit_code, u= int64_t exit_info_1) env->vm_hsave + offsetof(struct vmcb, save.dr7)); =20 /* other setups */ - x86_stq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.exit_cod= e), - exit_code); - x86_stq_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.exit_inf= o_1), - exit_info_1); - x86_stl_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.exit_int_info), x86_ldl_phys(cs, env->vm_vmcb + offsetof(struct vmcb, --=20 2.26.2