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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=57.103.72.174; envelope-from=mohamed@unpredictable.fr; helo=outbound.ms.icloud.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, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-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: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @unpredictable.fr) X-ZM-MESSAGEID: 1774294732712158500 Content-Type: text/plain; charset="utf-8" On Hyper-V fetching some guest registers is really expensive, so add a way to query some state from information provided by Hyper-V to save time on vmexits. Signed-off-by: Mohamed Mediouni --- target/i386/emulate/x86_emu.h | 3 +++ target/i386/emulate/x86_helpers.c | 6 ++++++ target/i386/emulate/x86_mmu.c | 3 +++ 3 files changed, 12 insertions(+) diff --git a/target/i386/emulate/x86_emu.h b/target/i386/emulate/x86_emu.h index 0f284b0c3d..4ed970bd53 100644 --- a/target/i386/emulate/x86_emu.h +++ b/target/i386/emulate/x86_emu.h @@ -32,6 +32,9 @@ struct x86_emul_ops { int size, int count); void (*simulate_rdmsr)(CPUState *cs); void (*simulate_wrmsr)(CPUState *cs); + bool (*is_protected_mode)(CPUState *cpu); + bool (*is_long_mode)(CPUState *cpu); + bool (*is_user_mode)(CPUState *cpu); }; =20 extern const struct x86_emul_ops *emul_ops; diff --git a/target/i386/emulate/x86_helpers.c b/target/i386/emulate/x86_he= lpers.c index 024f9a2afc..ebbf40f2b0 100644 --- a/target/i386/emulate/x86_helpers.c +++ b/target/i386/emulate/x86_helpers.c @@ -211,6 +211,9 @@ bool x86_is_protected(CPUState *cpu) X86CPU *x86_cpu =3D X86_CPU(cpu); CPUX86State *env =3D &x86_cpu->env; uint64_t cr0 =3D env->cr[0]; + if (emul_ops->is_protected_mode) { + return emul_ops->is_protected_mode(cpu); + } =20 return cr0 & CR0_PE_MASK; } @@ -234,6 +237,9 @@ bool x86_is_long_mode(CPUState *cpu) uint64_t efer =3D env->efer; uint64_t lme_lma =3D (MSR_EFER_LME | MSR_EFER_LMA); =20 + if (emul_ops->is_long_mode) { + return emul_ops->is_long_mode(cpu); + } return ((efer & lme_lma) =3D=3D lme_lma); } =20 diff --git a/target/i386/emulate/x86_mmu.c b/target/i386/emulate/x86_mmu.c index 4e39bae025..670939acdb 100644 --- a/target/i386/emulate/x86_mmu.c +++ b/target/i386/emulate/x86_mmu.c @@ -49,6 +49,9 @@ =20 static bool is_user(CPUState *cpu) { + if (emul_ops->is_user_mode) { + return emul_ops->is_user_mode(cpu); + } return false; } =20 --=20 2.50.1 (Apple Git-155)