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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::634; envelope-from=laramglazier@gmail.com; helo=mail-ej1-x634.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: 1627039794830100003 Content-Type: text/plain; charset="utf-8" VGIF allows STGI and CLGI to execute in guest mode and control virtual interrupts in guest mode. When the VGIF feature is enabled then: * executing STGI in the guest sets bit 9 of the VMCB offset 60h. * executing CLGI in the guest clears bit 9 of the VMCB offset 60h. Signed-off-by: Lara Lazier --- target/i386/cpu.c | 3 ++- target/i386/svm.h | 6 +++++ target/i386/tcg/sysemu/svm_helper.c | 36 +++++++++++++++++++++++++---- 3 files changed, 39 insertions(+), 6 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 48b55ebd0a..5e6d2b4294 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -631,7 +631,8 @@ void x86_cpu_vendor_words2str(char *dst, uint32_t vendo= r1, #define TCG_EXT3_FEATURES (CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM | \ CPUID_EXT3_CR8LEG | CPUID_EXT3_ABM | CPUID_EXT3_SSE4A) #define TCG_EXT4_FEATURES 0 -#define TCG_SVM_FEATURES CPUID_SVM_NPT +#define TCG_SVM_FEATURES (CPUID_SVM_NPT | CPUID_SVM_VGIF | \ + CPUID_SVM_SVME_ADDR_CHK) #define TCG_KVM_FEATURES 0 #define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \ CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \ diff --git a/target/i386/svm.h b/target/i386/svm.h index e54670ef12..dab2f90925 100644 --- a/target/i386/svm.h +++ b/target/i386/svm.h @@ -9,6 +9,12 @@ #define V_IRQ_SHIFT 8 #define V_IRQ_MASK (1 << V_IRQ_SHIFT) =20 +#define V_GIF_ENABLED_SHIFT 25 +#define V_GIF_ENABLED_MASK (1 << V_GIF_ENABLED_SHIFT) + +#define V_GIF_SHIFT 9 +#define V_GIF_MASK (1 << V_GIF_SHIFT) + #define V_INTR_PRIO_SHIFT 16 #define V_INTR_PRIO_MASK (0x0f << V_INTR_PRIO_SHIFT) =20 diff --git a/target/i386/tcg/sysemu/svm_helper.c b/target/i386/tcg/sysemu/s= vm_helper.c index 6118f6f587..ea85e3cae8 100644 --- a/target/i386/tcg/sysemu/svm_helper.c +++ b/target/i386/tcg/sysemu/svm_helper.c @@ -118,6 +118,11 @@ static inline void svm_vmrun_canonicalization(CPUX86St= ate *env) env->tr.base =3D (long) ((uint32_t) env->tr.base); } =20 +static inline bool virtual_gif_enabled(CPUX86State *env, uint32_t int_ctl) +{ + return (int_ctl & V_GIF_ENABLED_MASK) && (env->features[FEAT_SVM] & CP= UID_SVM_VGIF); +} + void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend) { CPUState *cs =3D env_cpu(env); @@ -353,9 +358,12 @@ void helper_vmrun(CPUX86State *env, int aflag, int nex= t_eip_addend) tlb_flush(cs); break; } - - env->hflags2 |=3D HF2_GIF_MASK; - + if (virtual_gif_enabled(env, int_ctl)) { + x86_stl_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.int_= ctl), + int_ctl |=3D V_GIF_MASK); + } else { + env->hflags2 |=3D HF2_GIF_MASK; + } if (int_ctl & V_IRQ_MASK) { CPUState *cs =3D env_cpu(env); =20 @@ -513,13 +521,31 @@ void helper_vmsave(CPUX86State *env, int aflag) void helper_stgi(CPUX86State *env) { cpu_svm_check_intercept_param(env, SVM_EXIT_STGI, 0, GETPC()); - env->hflags2 |=3D HF2_GIF_MASK; + + CPUState *cs =3D env_cpu(env); + uint32_t int_ctl =3D x86_ldl_phys(cs, + env->vm_vmcb + offsetof(struct vmcb, control.int_ct= l)); + if (virtual_gif_enabled(env, int_ctl) && likely(env->hflags & HF_GUEST= _MASK)) { + x86_stl_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.int_= ctl), + int_ctl |=3D V_GIF_MASK); + } else { + env->hflags2 |=3D HF2_GIF_MASK; + } } =20 void helper_clgi(CPUX86State *env) { cpu_svm_check_intercept_param(env, SVM_EXIT_CLGI, 0, GETPC()); - env->hflags2 &=3D ~HF2_GIF_MASK; + + CPUState *cs =3D env_cpu(env); + uint32_t int_ctl =3D x86_ldl_phys(cs, + env->vm_vmcb + offsetof(struct vmcb, control.int_ct= l)); + if (virtual_gif_enabled(env, int_ctl) && likely(env->hflags & HF_GUEST= _MASK)) { + x86_stl_phys(cs, env->vm_vmcb + offsetof(struct vmcb, control.int_= ctl), + int_ctl &=3D ~V_GIF_MASK); + } else { + env->hflags2 &=3D ~HF2_GIF_MASK; + } } =20 bool cpu_svm_has_intercept(CPUX86State *env, uint32_t type) --=20 2.25.1