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envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.256, 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_H2=-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: 2.1.29 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" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1666101130913100001 Content-Type: text/plain; charset="utf-8" From: Paul Brook Add a new hflag bit to determine whether AVX instructions are allowed Signed-off-by: Paul Brook Message-Id: <20220424220204.2493824-4-paul@nowt.org> Reviewed-by: Richard Henderson Signed-off-by: Paolo Bonzini --- target/i386/cpu.h | 3 +++ target/i386/helper.c | 12 ++++++++++++ target/i386/tcg/fpu_helper.c | 1 + 3 files changed, 16 insertions(+) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 5be90e72a9..dad2b2db8d 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -169,6 +169,7 @@ typedef enum X86Seg { #define HF_MPX_EN_SHIFT 25 /* MPX Enabled (CR4+XCR0+BNDCFGx) */ #define HF_MPX_IU_SHIFT 26 /* BND registers in-use */ #define HF_UMIP_SHIFT 27 /* CR4.UMIP */ +#define HF_AVX_EN_SHIFT 28 /* AVX Enabled (CR4+XCR0) */ =20 #define HF_CPL_MASK (3 << HF_CPL_SHIFT) #define HF_INHIBIT_IRQ_MASK (1 << HF_INHIBIT_IRQ_SHIFT) @@ -195,6 +196,7 @@ typedef enum X86Seg { #define HF_MPX_EN_MASK (1 << HF_MPX_EN_SHIFT) #define HF_MPX_IU_MASK (1 << HF_MPX_IU_SHIFT) #define HF_UMIP_MASK (1 << HF_UMIP_SHIFT) +#define HF_AVX_EN_MASK (1 << HF_AVX_EN_SHIFT) =20 /* hflags2 */ =20 @@ -2126,6 +2128,7 @@ void host_cpuid(uint32_t function, uint32_t count, =20 /* helper.c */ void x86_cpu_set_a20(X86CPU *cpu, int a20_state); +void cpu_sync_avx_hflag(CPUX86State *env); =20 #ifndef CONFIG_USER_ONLY static inline int x86_asidx_from_attrs(CPUState *cs, MemTxAttrs attrs) diff --git a/target/i386/helper.c b/target/i386/helper.c index b954ccda50..b62a1e48e2 100644 --- a/target/i386/helper.c +++ b/target/i386/helper.c @@ -29,6 +29,17 @@ #endif #include "qemu/log.h" =20 +void cpu_sync_avx_hflag(CPUX86State *env) +{ + if ((env->cr[4] & CR4_OSXSAVE_MASK) + && (env->xcr0 & (XSTATE_SSE_MASK | XSTATE_YMM_MASK)) + =3D=3D (XSTATE_SSE_MASK | XSTATE_YMM_MASK)) { + env->hflags |=3D HF_AVX_EN_MASK; + } else{ + env->hflags &=3D ~HF_AVX_EN_MASK; + } +} + void cpu_sync_bndcs_hflags(CPUX86State *env) { uint32_t hflags =3D env->hflags; @@ -209,6 +220,7 @@ void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_= cr4) env->hflags =3D hflags; =20 cpu_sync_bndcs_hflags(env); + cpu_sync_avx_hflag(env); } =20 #if !defined(CONFIG_USER_ONLY) diff --git a/target/i386/tcg/fpu_helper.c b/target/i386/tcg/fpu_helper.c index ad58931751..9b59026e37 100644 --- a/target/i386/tcg/fpu_helper.c +++ b/target/i386/tcg/fpu_helper.c @@ -2955,6 +2955,7 @@ void helper_xsetbv(CPUX86State *env, uint32_t ecx, ui= nt64_t mask) =20 env->xcr0 =3D mask; cpu_sync_bndcs_hflags(env); + cpu_sync_avx_hflag(env); return; =20 do_gpf: --=20 2.37.3