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Fri, 13 Sep 2024 04:13:51 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E2D9E20040; Fri, 13 Sep 2024 04:13:50 +0000 (GMT) Received: from ltcrain34-lp1.aus.stglabs.ibm.com (unknown [9.3.101.40]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 13 Sep 2024 04:13:50 +0000 (GMT) From: Harsh Prateek Bora To: qemu-ppc@nongnu.org, qemu-devel@nongnu.org Cc: npiggin@gmail.com, balaton@eik.bme.hu, danielhb413@gmail.com Subject: [PATCH v3 05/10] target/ppc: optimize p9 exception handling routines for lpcr Date: Fri, 13 Sep 2024 09:43:32 +0530 Message-ID: <20240913041337.912876-6-harshpb@linux.ibm.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240913041337.912876-1-harshpb@linux.ibm.com> References: <20240913041337.912876-1-harshpb@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: ZKEbV7XkqeAUAv0FT34qu_WmZw5Q_4Kb X-Proofpoint-ORIG-GUID: VpWU5CWcTyongMzEJlFjpH0CUywLT_04 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-13_01,2024-09-12_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 suspectscore=0 clxscore=1015 phishscore=0 spamscore=0 lowpriorityscore=0 adultscore=0 mlxscore=0 mlxlogscore=773 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2408220000 definitions=main-2409130028 Received-SPF: pass client-ip=148.163.158.5; envelope-from=harshpb@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Like pending_interrupts, env->spr[SPR_LPCR] is being used at multiple places across p9 exception handlers. Pass the value during entry and avoid multiple indirect accesses. Signed-off-by: Harsh Prateek Bora Reviewed-by: Nicholas Piggin --- target/ppc/excp_helper.c | 33 ++++++++++++++++++--------------- 1 file changed, 18 insertions(+), 15 deletions(-) diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c index 31c1653e2b..c7641898ca 100644 --- a/target/ppc/excp_helper.c +++ b/target/ppc/excp_helper.c @@ -1873,13 +1873,14 @@ static int p8_next_unmasked_interrupt(CPUPPCState *env) PPC_INTERRUPT_PIT | PPC_INTERRUPT_THERM) static int p9_interrupt_powersave(CPUPPCState *env, - uint32_t pending_interrupts) + uint32_t pending_interrupts, + target_ulong lpcr) { /* External Exception */ if ((pending_interrupts & PPC_INTERRUPT_EXT) && - (env->spr[SPR_LPCR] & LPCR_EEE)) { - bool heic = !!(env->spr[SPR_LPCR] & LPCR_HEIC); + (lpcr & LPCR_EEE)) { + bool heic = !!(lpcr & LPCR_HEIC); if (!heic || !FIELD_EX64_HV(env->msr) || FIELD_EX64(env->msr, MSR, PR)) { return PPC_INTERRUPT_EXT; @@ -1887,11 +1888,11 @@ static int p9_interrupt_powersave(CPUPPCState *env, } /* Decrementer Exception */ if ((pending_interrupts & PPC_INTERRUPT_DECR) && - (env->spr[SPR_LPCR] & LPCR_DEE)) { + (lpcr & LPCR_DEE)) { return PPC_INTERRUPT_DECR; } /* Machine Check or Hypervisor Maintenance Exception */ - if (env->spr[SPR_LPCR] & LPCR_OEE) { + if (lpcr & LPCR_OEE) { if (pending_interrupts & PPC_INTERRUPT_MCK) { return PPC_INTERRUPT_MCK; } @@ -1901,17 +1902,17 @@ static int p9_interrupt_powersave(CPUPPCState *env, } /* Privileged Doorbell Exception */ if ((pending_interrupts & PPC_INTERRUPT_DOORBELL) && - (env->spr[SPR_LPCR] & LPCR_PDEE)) { + (lpcr & LPCR_PDEE)) { return PPC_INTERRUPT_DOORBELL; } /* Hypervisor Doorbell Exception */ if ((pending_interrupts & PPC_INTERRUPT_HDOORBELL) && - (env->spr[SPR_LPCR] & LPCR_HDEE)) { + (lpcr & LPCR_HDEE)) { return PPC_INTERRUPT_HDOORBELL; } /* Hypervisor virtualization exception */ if ((pending_interrupts & PPC_INTERRUPT_HVIRT) && - (env->spr[SPR_LPCR] & LPCR_HVEE)) { + (lpcr & LPCR_HVEE)) { return PPC_INTERRUPT_HVIRT; } if (pending_interrupts & PPC_INTERRUPT_RESET) { @@ -1921,7 +1922,8 @@ static int p9_interrupt_powersave(CPUPPCState *env, } static int p9_next_unmasked_interrupt(CPUPPCState *env, - uint32_t pending_interrupts) + uint32_t pending_interrupts, + target_ulong lpcr) { CPUState *cs = env_cpu(env); @@ -1936,7 +1938,7 @@ static int p9_next_unmasked_interrupt(CPUPPCState *env, * When PSSCR[EC] is set, LPCR[PECE] controls which interrupts can * wakeup the processor */ - return p9_interrupt_powersave(env, pending_interrupts); + return p9_interrupt_powersave(env, pending_interrupts, lpcr); } else { /* * When it's clear, any system-caused exception exits power-saving @@ -1954,7 +1956,7 @@ static int p9_next_unmasked_interrupt(CPUPPCState *env, /* Hypervisor decrementer exception */ if (pending_interrupts & PPC_INTERRUPT_HDECR) { /* LPCR will be clear when not supported so this will work */ - bool hdice = !!(env->spr[SPR_LPCR] & LPCR_HDICE); + bool hdice = !!(lpcr & LPCR_HDICE); if ((msr_ee || !FIELD_EX64_HV(env->msr)) && hdice) { /* HDEC clears on delivery */ return PPC_INTERRUPT_HDECR; @@ -1964,7 +1966,7 @@ static int p9_next_unmasked_interrupt(CPUPPCState *env, /* Hypervisor virtualization interrupt */ if (pending_interrupts & PPC_INTERRUPT_HVIRT) { /* LPCR will be clear when not supported so this will work */ - bool hvice = !!(env->spr[SPR_LPCR] & LPCR_HVICE); + bool hvice = !!(lpcr & LPCR_HVICE); if ((msr_ee || !FIELD_EX64_HV(env->msr)) && hvice) { return PPC_INTERRUPT_HVIRT; } @@ -1972,8 +1974,8 @@ static int p9_next_unmasked_interrupt(CPUPPCState *env, /* External interrupt can ignore MSR:EE under some circumstances */ if (pending_interrupts & PPC_INTERRUPT_EXT) { - bool lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0); - bool heic = !!(env->spr[SPR_LPCR] & LPCR_HEIC); + bool lpes0 = !!(lpcr & LPCR_LPES0); + bool heic = !!(lpcr & LPCR_HEIC); /* HEIC blocks delivery to the hypervisor */ if ((msr_ee && !(heic && FIELD_EX64_HV(env->msr) && !FIELD_EX64(env->msr, MSR, PR))) || @@ -2023,7 +2025,8 @@ static int ppc_next_unmasked_interrupt(CPUPPCState *env) case POWERPC_EXCP_POWER9: case POWERPC_EXCP_POWER10: case POWERPC_EXCP_POWER11: - return p9_next_unmasked_interrupt(env, env->pending_interrupts); + return p9_next_unmasked_interrupt(env, env->pending_interrupts, + env->spr[SPR_LPCR]); default: break; }