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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E85C4C433F5 for ; Wed, 20 Apr 2022 11:25:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378027AbiDTL2f (ORCPT ); Wed, 20 Apr 2022 07:28:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378029AbiDTL2S (ORCPT ); Wed, 20 Apr 2022 07:28:18 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 22E671E3D0 for ; Wed, 20 Apr 2022 04:25:24 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id s137so1342877pgs.5 for ; Wed, 20 Apr 2022 04:25:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=W/lhXgecBDWrQwrmi3IwcGDaw2Q0aGQ9eYgSFA2SGhM=; b=mq0MqMZABzTc+/HenZrx4jIjHskHGbPWFO0zolX7aGm6nOvmdHo3sUi4z1OzbFH1kY FZYRRTiZGfmnFe905yHmrNmy082WbSRJL5akr43VqfbRTWKbyWgJh2aUSPzmG/g1Qjqb RRIDlaEWJVGnkZ7JhAPFeyh9XKD5/PSU4g1P/ofzzHSV50GyRPFTt1SJniBKJ1xXP97N hV49noZYTRKb/YbNmpp8lI55WEJcKdgvoU45RRpHcSHe0xh0pefKcprDEFalAnYcp1iI 7gn7AJxBgE3WHX2UtcXxYc1BxfBHMcEyFOwGqYMjbp6Yu2rC5WGzKGJNeg4xVwiP2+q0 Rc0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=W/lhXgecBDWrQwrmi3IwcGDaw2Q0aGQ9eYgSFA2SGhM=; b=dfgT0DvP7EbbKopWvD/Z3FNUNz+o5V2YqvEzq/VtdNABuRGhkpHekg6O5S/L5ka7Zw 49/+wdudblTVyFvVxarWL7ETbqFFk0EIcuXL4jCiLaah078+JBhV/AitHuhPhbLh2ybK k9dL/YooBNRbl8KwFIJ6S/WuGdXG3uKrLYHJHFznJ12Vfzqdfu1Jp8vjTBkzjs52+ObB HkFPCQndDCrpFrXzauVlB4ud2xKQO+bMTtbw/x0iw1bLU3J74Ij1sFvnKMsbVhiIatMV Iqd1w48Aig2VNIXyj167VR+6VxOqi+fsps92iMsfKHBF4arAk77pVHykLBFSYIZG5RVU 0AeQ== X-Gm-Message-State: AOAM530VK/Xq/isa3nZ5wBtcuRDYYCME8cKPvSXZKL+N1wSLhAFsBkYf 7CsdFghzcVFMfEs6Ysh71qq1vQ== X-Google-Smtp-Source: ABdhPJz9nV0msPZvcrWhZpToFAJ37v3xNoclCZihIzibbkZvB62z1STbaDlTLIG+owmRpdjqD288fQ== X-Received: by 2002:a05:6a00:996:b0:505:b6d2:abc8 with SMTP id u22-20020a056a00099600b00505b6d2abc8mr22909619pfg.11.1650453924256; Wed, 20 Apr 2022 04:25:24 -0700 (PDT) Received: from localhost.localdomain ([122.167.88.101]) by smtp.gmail.com with ESMTPSA id u12-20020a17090a890c00b001b8efcf8e48sm22529274pjn.14.2022.04.20.04.25.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Apr 2022 04:25:23 -0700 (PDT) From: Anup Patel To: Paolo Bonzini , Atish Patra Cc: Palmer Dabbelt , Paul Walmsley , Alistair Francis , Anup Patel , kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Anup Patel Subject: [PATCH v2 5/7] RISC-V: KVM: Reduce KVM_MAX_VCPUS value Date: Wed, 20 Apr 2022 16:54:48 +0530 Message-Id: <20220420112450.155624-6-apatel@ventanamicro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220420112450.155624-1-apatel@ventanamicro.com> References: <20220420112450.155624-1-apatel@ventanamicro.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, the KVM_MAX_VCPUS value is 16384 for RV64 and 128 for RV32. The KVM_MAX_VCPUS value is too high for RV64 and too low for RV32 compared to other architectures (e.g. x86 sets it to 1024 and ARM64 sets it to 512). The too high value of KVM_MAX_VCPUS on RV64 also leads to VCPU mask on stack consuming 2KB. We set KVM_MAX_VCPUS to 1024 for both RV64 and RV32 to be aligned other architectures. Signed-off-by: Anup Patel --- arch/riscv/include/asm/kvm_host.h | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 806f74dc0bfc..61d8b40e3d82 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -16,8 +16,7 @@ #include #include -#define KVM_MAX_VCPUS \ - ((HGATP_VMID_MASK >> HGATP_VMID_SHIFT) + 1) +#define KVM_MAX_VCPUS 1024 #define KVM_HALT_POLL_NS_DEFAULT 500000 -- 2.25.1