From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AAC64C433ED for ; Tue, 4 May 2021 06:49:01 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 369D1613B3 for ; Tue, 4 May 2021 06:49:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 369D1613B3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:46614 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ldorc-00050p-Bu for qemu-devel@archiver.kernel.org; Tue, 04 May 2021 02:49:00 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60906) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ldo11-0006jL-EY; Tue, 04 May 2021 01:54:39 -0400 Received: from ozlabs.org ([203.11.71.1]:44035) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ldo0x-0005B8-MH; Tue, 04 May 2021 01:54:38 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 4FZ8CP4lZgz9t10; Tue, 4 May 2021 15:53:21 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1620107601; bh=7s0wh9A/59HjPU6V9IWuN3aCWuxXIcM4WxtwCSfx7ug=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kavHcnSrRl6F+mheeXclQ6DyAgqUnxactHqVL/9ZCbOi6cYutHwYpzELZlxODxgqu uryO3vCBVaekViAiJnhIAI+Ta+tSyj8LYmOcsxqbc7IsW8tTjLI1UiF6DDBHyhPHiw +d0m2quiT7I0LC4p6IUo/d3poC/vF197uRdUE/N4= From: David Gibson To: peter.maydell@linaro.org, groug@kaod.org Subject: [PULL 40/46] target/ppc: Add POWER10 exception model Date: Tue, 4 May 2021 15:53:06 +1000 Message-Id: <20210504055312.306823-41-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210504055312.306823-1-david@gibson.dropbear.id.au> References: <20210504055312.306823-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=203.11.71.1; envelope-from=dgibson@ozlabs.org; helo=ozlabs.org X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no 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: David Gibson , qemu-ppc@nongnu.org, qemu-devel@nongnu.org, Nicholas Piggin , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Nicholas Piggin POWER10 adds a new bit that modifies interrupt behaviour, LPCR[HAIL], and it removes support for the LPCR[AIL]=0b10 mode. Reviewed-by: Cédric Le Goater Tested-by: Cédric Le Goater Signed-off-by: Nicholas Piggin Message-Id: <20210501072436.145444-3-npiggin@gmail.com> [dwg: Corrected tab indenting] Signed-off-by: David Gibson --- hw/ppc/spapr_hcall.c | 7 ++++- target/ppc/cpu-qom.h | 2 ++ target/ppc/cpu.h | 5 +-- target/ppc/excp_helper.c | 54 +++++++++++++++++++++++++++++++-- target/ppc/translate.c | 3 +- target/ppc/translate_init.c.inc | 2 +- 6 files changed, 65 insertions(+), 8 deletions(-) diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c index 2fbe04a689..7275d0bba1 100644 --- a/hw/ppc/spapr_hcall.c +++ b/hw/ppc/spapr_hcall.c @@ -1396,7 +1396,12 @@ static target_ulong h_set_mode_resource_addr_trans_mode(PowerPCCPU *cpu, } if (mflags == 1) { - /* AIL=1 is reserved */ + /* AIL=1 is reserved in POWER8/POWER9/POWER10 */ + return H_UNSUPPORTED_FLAG; + } + + if (mflags == 2 && (pcc->insns_flags2 & PPC2_ISA310)) { + /* AIL=2 is reserved in POWER10 (ISA v3.1) */ return H_UNSUPPORTED_FLAG; } diff --git a/target/ppc/cpu-qom.h b/target/ppc/cpu-qom.h index 118baf8d41..06b6571bc9 100644 --- a/target/ppc/cpu-qom.h +++ b/target/ppc/cpu-qom.h @@ -116,6 +116,8 @@ enum powerpc_excp_t { POWERPC_EXCP_POWER8, /* POWER9 exception model */ POWERPC_EXCP_POWER9, + /* POWER10 exception model */ + POWERPC_EXCP_POWER10, }; /*****************************************************************************/ diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index be24a501fc..8a076fab48 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -354,10 +354,11 @@ typedef struct ppc_v3_pate_t { #define LPCR_PECE_U_SHIFT (63 - 19) #define LPCR_PECE_U_MASK (0x7ull << LPCR_PECE_U_SHIFT) #define LPCR_HVEE PPC_BIT(17) /* Hypervisor Virt Exit Enable */ -#define LPCR_RMLS_SHIFT (63 - 37) +#define LPCR_RMLS_SHIFT (63 - 37) /* RMLS (removed in ISA v3.0) */ #define LPCR_RMLS (0xfull << LPCR_RMLS_SHIFT) +#define LPCR_HAIL PPC_BIT(37) /* ISA v3.1 HV AIL=3 equivalent */ #define LPCR_ILE PPC_BIT(38) -#define LPCR_AIL_SHIFT (63 - 40) /* Alternate interrupt location */ +#define LPCR_AIL_SHIFT (63 - 40) /* Alternate interrupt location */ #define LPCR_AIL (3ull << LPCR_AIL_SHIFT) #define LPCR_UPRT PPC_BIT(41) /* Use Process Table */ #define LPCR_EVIRT PPC_BIT(42) /* Enhanced Virtualisation */ diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c index 15b2813253..f4f15279eb 100644 --- a/target/ppc/excp_helper.c +++ b/target/ppc/excp_helper.c @@ -170,7 +170,27 @@ static int powerpc_reset_wakeup(CPUState *cs, CPUPPCState *env, int excp, * +-------------------------------------------------------+ * * The difference with POWER9 being that MSR[HV] 0->1 interrupts can be sent to - * the hypervisor in AIL mode if the guest is radix. + * the hypervisor in AIL mode if the guest is radix. This is good for + * performance but allows the guest to influence the AIL of hypervisor + * interrupts using its MSR, and also the hypervisor must disallow guest + * interrupts (MSR[HV] 0->0) from using AIL if the hypervisor does not want to + * use AIL for its MSR[HV] 0->1 interrupts. + * + * POWER10 addresses those issues with a new LPCR[HAIL] bit that is applied to + * interrupts that begin execution with MSR[HV]=1 (so both MSR[HV] 0->1 and + * MSR[HV] 1->1). + * + * HAIL=1 is equivalent to AIL=3, for interrupts delivered with MSR[HV]=1. + * + * POWER10 behaviour is + * | LPCR[AIL] | LPCR[HAIL] | MSR[IR||DR] | MSR[HV] | new MSR[HV] | AIL | + * +-----------+------------+-------------+---------+-------------+-----+ + * | a | h | 00/01/10 | 0 | 0 | 0 | + * | a | h | 11 | 0 | 0 | a | + * | a | h | x | 0 | 1 | h | + * | a | h | 00/01/10 | 1 | 1 | 0 | + * | a | h | 11 | 1 | 1 | h | + * +--------------------------------------------------------------------+ */ static inline void ppc_excp_apply_ail(PowerPCCPU *cpu, int excp_model, int excp, target_ulong msr, @@ -213,6 +233,32 @@ static inline void ppc_excp_apply_ail(PowerPCCPU *cpu, int excp_model, int excp, /* AIL=1 is reserved, treat it like AIL=0 */ return; } + + } else if (excp_model == POWERPC_EXCP_POWER10) { + if (!mmu_all_on && !hv_escalation) { + /* + * AIL works for HV interrupts even with guest MSR[IR/DR] disabled. + * Guest->guest and HV->HV interrupts do require MMU on. + */ + return; + } + + if (*new_msr & MSR_HVB) { + if (!(env->spr[SPR_LPCR] & LPCR_HAIL)) { + /* HV interrupts depend on LPCR[HAIL] */ + return; + } + ail = 3; /* HAIL=1 gives AIL=3 behaviour for HV interrupts */ + } else { + ail = (env->spr[SPR_LPCR] & LPCR_AIL) >> LPCR_AIL_SHIFT; + } + if (ail == 0) { + return; + } + if (ail == 1 || ail == 2) { + /* AIL=1 and AIL=2 are reserved, treat them like AIL=0 */ + return; + } } else { /* Other processors do not support AIL */ return; @@ -328,7 +374,8 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp) #if defined(TARGET_PPC64) if (excp_model == POWERPC_EXCP_POWER7 || excp_model == POWERPC_EXCP_POWER8 || - excp_model == POWERPC_EXCP_POWER9) { + excp_model == POWERPC_EXCP_POWER9 || + excp_model == POWERPC_EXCP_POWER10) { lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0); } else #endif /* defined(TARGET_PPC64) */ @@ -848,7 +895,8 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp) } else if (env->spr[SPR_LPCR] & LPCR_ILE) { new_msr |= (target_ulong)1 << MSR_LE; } - } else if (excp_model == POWERPC_EXCP_POWER9) { + } else if (excp_model == POWERPC_EXCP_POWER9 || + excp_model == POWERPC_EXCP_POWER10) { if (new_msr & MSR_HVB) { if (env->spr[SPR_HID0] & HID0_POWER9_HILE) { new_msr |= (target_ulong)1 << MSR_LE; diff --git a/target/ppc/translate.c b/target/ppc/translate.c index a7c568ca9c..a6381208a5 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -7731,7 +7731,8 @@ void ppc_cpu_dump_state(CPUState *cs, FILE *f, int flags) #if defined(TARGET_PPC64) if (env->excp_model == POWERPC_EXCP_POWER7 || env->excp_model == POWERPC_EXCP_POWER8 || - env->excp_model == POWERPC_EXCP_POWER9) { + env->excp_model == POWERPC_EXCP_POWER9 || + env->excp_model == POWERPC_EXCP_POWER10) { qemu_fprintf(f, "HSRR0 " TARGET_FMT_lx " HSRR1 " TARGET_FMT_lx "\n", env->spr[SPR_HSRR0], env->spr[SPR_HSRR1]); } diff --git a/target/ppc/translate_init.c.inc b/target/ppc/translate_init.c.inc index 65906c7e6d..f92656b2f2 100644 --- a/target/ppc/translate_init.c.inc +++ b/target/ppc/translate_init.c.inc @@ -9316,7 +9316,7 @@ POWERPC_FAMILY(POWER10)(ObjectClass *oc, void *data) pcc->radix_page_info = &POWER10_radix_page_info; pcc->lrg_decr_bits = 56; #endif - pcc->excp_model = POWERPC_EXCP_POWER9; + pcc->excp_model = POWERPC_EXCP_POWER10; pcc->bus_model = PPC_FLAGS_INPUT_POWER9; pcc->bfd_mach = bfd_mach_ppc64; pcc->flags = POWERPC_FLAG_VRE | POWERPC_FLAG_SE | -- 2.31.1