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=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 13924C433DF for ; Mon, 22 Jun 2020 11:34:00 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id C5D4420708 for ; Mon, 22 Jun 2020 11:33:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C5D4420708 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 7E8F34B0EC; Mon, 22 Jun 2020 07:33:59 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZYlkKto7H96j; Mon, 22 Jun 2020 07:33:58 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 1030F4B0DB; Mon, 22 Jun 2020 07:33:58 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 91EF84B0D7 for ; Mon, 22 Jun 2020 07:33:56 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id iVXyDawpd0BA for ; Mon, 22 Jun 2020 07:33:55 -0400 (EDT) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 33E8C4B0F1 for ; Mon, 22 Jun 2020 07:33:55 -0400 (EDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E38951FB; Mon, 22 Jun 2020 04:33:54 -0700 (PDT) Received: from merodach.members.linode.com (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 20E583F71E; Mon, 22 Jun 2020 04:33:54 -0700 (PDT) From: James Morse To: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Subject: [PATCH 4/5] KVM: arm64: Remove target_table from exit handlers Date: Mon, 22 Jun 2020 11:33:16 +0000 Message-Id: <20200622113317.20477-5-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200622113317.20477-1-james.morse@arm.com> References: <20200622113317.20477-1-james.morse@arm.com> MIME-Version: 1.0 Cc: Marc Zyngier X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Whenever KVM searches for a register (e.g. due to a guest exit), it works with two tables, as the target table overrides the sys_regs array. Now that everything is in the sys_regs array, and the target table is empty, stop doing that. Remove the second table and its size from all the functions that take it. Signed-off-by: James Morse --- arch/arm64/kvm/sys_regs.c | 87 +++++++-------------------------------- 1 file changed, 16 insertions(+), 71 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index f8407cfa9032..14333005b476 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2269,9 +2269,7 @@ static void unhandled_cp_access(struct kvm_vcpu *vcpu, */ static int kvm_handle_cp_64(struct kvm_vcpu *vcpu, const struct sys_reg_desc *global, - size_t nr_global, - const struct sys_reg_desc *target_specific, - size_t nr_specific) + size_t nr_global) { struct sys_reg_params params; u32 hsr = kvm_vcpu_get_hsr(vcpu); @@ -2298,14 +2296,11 @@ static int kvm_handle_cp_64(struct kvm_vcpu *vcpu, } /* - * Try to emulate the coprocessor access using the target - * specific table first, and using the global table afterwards. - * If either of the tables contains a handler, handle the + * If the table contains a handler, handle the * potential register operation in the case of a read and return * with success. */ - if (!emulate_cp(vcpu, ¶ms, target_specific, nr_specific) || - !emulate_cp(vcpu, ¶ms, global, nr_global)) { + if (!emulate_cp(vcpu, ¶ms, global, nr_global)) { /* Split up the value between registers for the read side */ if (!params.is_write) { vcpu_set_reg(vcpu, Rt, lower_32_bits(params.regval)); @@ -2326,9 +2321,7 @@ static int kvm_handle_cp_64(struct kvm_vcpu *vcpu, */ static int kvm_handle_cp_32(struct kvm_vcpu *vcpu, const struct sys_reg_desc *global, - size_t nr_global, - const struct sys_reg_desc *target_specific, - size_t nr_specific) + size_t nr_global) { struct sys_reg_params params; u32 hsr = kvm_vcpu_get_hsr(vcpu); @@ -2344,8 +2337,7 @@ static int kvm_handle_cp_32(struct kvm_vcpu *vcpu, params.Op1 = (hsr >> 14) & 0x7; params.Op2 = (hsr >> 17) & 0x7; - if (!emulate_cp(vcpu, ¶ms, target_specific, nr_specific) || - !emulate_cp(vcpu, ¶ms, global, nr_global)) { + if (!emulate_cp(vcpu, ¶ms, global, nr_global)) { if (!params.is_write) vcpu_set_reg(vcpu, Rt, params.regval); return 1; @@ -2357,38 +2349,22 @@ static int kvm_handle_cp_32(struct kvm_vcpu *vcpu, int kvm_handle_cp15_64(struct kvm_vcpu *vcpu, struct kvm_run *run) { - const struct sys_reg_desc *target_specific; - size_t num; - - target_specific = get_target_table(vcpu->arch.target, false, &num); - return kvm_handle_cp_64(vcpu, - cp15_64_regs, ARRAY_SIZE(cp15_64_regs), - target_specific, num); + return kvm_handle_cp_64(vcpu, cp15_64_regs, ARRAY_SIZE(cp15_64_regs)); } int kvm_handle_cp15_32(struct kvm_vcpu *vcpu, struct kvm_run *run) { - const struct sys_reg_desc *target_specific; - size_t num; - - target_specific = get_target_table(vcpu->arch.target, false, &num); - return kvm_handle_cp_32(vcpu, - cp15_regs, ARRAY_SIZE(cp15_regs), - target_specific, num); + return kvm_handle_cp_32(vcpu, cp15_regs, ARRAY_SIZE(cp15_regs)); } int kvm_handle_cp14_64(struct kvm_vcpu *vcpu, struct kvm_run *run) { - return kvm_handle_cp_64(vcpu, - cp14_64_regs, ARRAY_SIZE(cp14_64_regs), - NULL, 0); + return kvm_handle_cp_64(vcpu, cp14_64_regs, ARRAY_SIZE(cp14_64_regs)); } int kvm_handle_cp14_32(struct kvm_vcpu *vcpu, struct kvm_run *run) { - return kvm_handle_cp_32(vcpu, - cp14_regs, ARRAY_SIZE(cp14_regs), - NULL, 0); + return kvm_handle_cp_32(vcpu, cp14_regs, ARRAY_SIZE(cp14_regs)); } static bool is_imp_def_sys_reg(struct sys_reg_params *params) @@ -2400,15 +2376,9 @@ static bool is_imp_def_sys_reg(struct sys_reg_params *params) static int emulate_sys_reg(struct kvm_vcpu *vcpu, struct sys_reg_params *params) { - size_t num; - const struct sys_reg_desc *table, *r; - - table = get_target_table(vcpu->arch.target, true, &num); + const struct sys_reg_desc *r; - /* Search target-specific then generic table. */ - r = find_reg(params, table, num); - if (!r) - r = find_reg(params, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); + r = find_reg(params, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); if (likely(r)) { perform_access(vcpu, params, r); @@ -2512,8 +2482,7 @@ const struct sys_reg_desc *find_reg_by_id(u64 id, static const struct sys_reg_desc *index_to_sys_reg_desc(struct kvm_vcpu *vcpu, u64 id) { - size_t num; - const struct sys_reg_desc *table, *r; + const struct sys_reg_desc *r; struct sys_reg_params params; /* We only do sys_reg for now. */ @@ -2523,10 +2492,7 @@ static const struct sys_reg_desc *index_to_sys_reg_desc(struct kvm_vcpu *vcpu, if (!index_to_params(id, ¶ms)) return NULL; - table = get_target_table(vcpu->arch.target, true, &num); - r = find_reg(¶ms, table, num); - if (!r) - r = find_reg(¶ms, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); + r = find_reg(¶ms, sys_reg_descs, ARRAY_SIZE(sys_reg_descs)); /* Not saved in the sys_reg array and not otherwise accessible? */ if (r && !(r->reg || r->get_user)) @@ -2826,38 +2792,17 @@ static int walk_one_sys_reg(const struct kvm_vcpu *vcpu, /* Assumed ordered tables, see kvm_sys_reg_table_init. */ static int walk_sys_regs(struct kvm_vcpu *vcpu, u64 __user *uind) { - const struct sys_reg_desc *i1, *i2, *end1, *end2; + const struct sys_reg_desc *i2, *end2; unsigned int total = 0; - size_t num; int err; - /* We check for duplicates here, to allow arch-specific overrides. */ - i1 = get_target_table(vcpu->arch.target, true, &num); - end1 = i1 + num; i2 = sys_reg_descs; end2 = sys_reg_descs + ARRAY_SIZE(sys_reg_descs); - if (i1 == end1) - i1 = NULL; - - BUG_ON(i2 == end2); - - /* Walk carefully, as both tables may refer to the same register. */ - while (i1 || i2) { - int cmp = cmp_sys_reg(i1, i2); - /* target-specific overrides generic entry. */ - if (cmp <= 0) - err = walk_one_sys_reg(vcpu, i1, &uind, &total); - else - err = walk_one_sys_reg(vcpu, i2, &uind, &total); - + while (i2 != end2) { + err = walk_one_sys_reg(vcpu, i2++, &uind, &total); if (err) return err; - - if (cmp <= 0 && ++i1 == end1) - i1 = NULL; - if (cmp >= 0 && ++i2 == end2) - i2 = NULL; } return total; } -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm