From patchwork Mon May 16 15:55:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851012 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1BBF6C433FE for ; Mon, 16 May 2022 15:56:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=9/yfpND9cnUt3+YPcAmyOsejSOvWBzXUYsEtaVy0oUo=; b=qNbFlZwiAiHjhv PAUquO1VQWbgAPXPtaXus7dDCo5zYKqWKKjwjl9Cy3tn3Dc84TCEL5F/8HFjlvLAGzYLOgy35cykK OpaJWErNp7TSb6YjAPOjJ48GkRXn3XMje4SldmLWz9YCG5Hsgchk9lVuBojRcPVuz2+QhyxG28GQw JehKzYhwsUGmagbXIe3VbM63X/Ag0X/vLd5AIyukVyRNAqbBNRYMhjlLY9AD/grnjVcps+qYPfEex TzMR8il88LIVti0n8kMU7Bd2w4s8SKk/V4yZBLoiEaC7WlWc7PWwqFhRbcN3Hmz10E8LoyrF687Uz hOVu825jrcqHcor+kpNg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4F-008kom-3n; Mon, 16 May 2022 15:55:31 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4C-008kn2-2c for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:29 +0000 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 67A7411FB; Mon, 16 May 2022 08:55:24 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 03D2B3F73D; Mon, 16 May 2022 08:55:22 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Subject: [PATCH v2 kvmtool 01/12] Use MB for megabytes consistently Date: Mon, 16 May 2022 16:55:15 +0100 Message-Id: <20220516155526.181694-2-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085528_212049_2850A652 X-CRM114-Status: GOOD ( 11.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The help text for the -m/--mem argument states that the guest memory size is in MiB (mebibyte). MiB is the same thing as MB (megabyte), and indeed this is how MB is used throughout kvmtool. Replace MiB with MB, so people don't get the wrong idea and start believing that for kvmtool a MB is 10^6 bytes instead of 2^20. Signed-off-by: Alexandru Elisei --- Documentation/kvmtool.1 | 4 ++-- builtin-run.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/Documentation/kvmtool.1 b/Documentation/kvmtool.1 index 2b8c274dc3ff..25d46f8f51f9 100644 --- a/Documentation/kvmtool.1 +++ b/Documentation/kvmtool.1 @@ -10,7 +10,7 @@ kvmtool is a userland tool for creating and controlling KVM guests. .SH "KVMTOOL COMMANDS" .sp .PP -.B run -k [\-c ] [\-m ] [\-p ] +.B run -k [\-c ] [\-m ] [\-p ] .br .B [\-i ] [\-d ] [\-\-console serial|virtio|hv] .br @@ -30,7 +30,7 @@ The number of virtual CPUs to run. .sp .B \-m, \-\-mem .RS 4 -Virtual machine memory size in MiB. +Virtual machine memory size in MB. .RE .sp .B \-p, \-\-params diff --git a/builtin-run.c b/builtin-run.c index 9a1a0c1fa6fb..0126c9fbcba6 100644 --- a/builtin-run.c +++ b/builtin-run.c @@ -97,7 +97,7 @@ void kvm_run_set_wrapper_sandbox(void) "A name for the guest"), \ OPT_INTEGER('c', "cpus", &(cfg)->nrcpus, "Number of CPUs"), \ OPT_U64('m', "mem", &(cfg)->ram_size, "Virtual machine memory" \ - " size in MiB."), \ + " size in MB."), \ OPT_CALLBACK('d', "disk", kvm, "image or rootfs_dir", "Disk " \ " image or rootfs directory", img_name_parser, \ kvm), \ From patchwork Mon May 16 15:55:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851014 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CD381C433EF for ; Mon, 16 May 2022 15:56:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=V2Fs/1NS1br9bKsTssIOXDrYso6cVTvwcAjrtBzXAUg=; b=B6KAcgiPq4dNlT wvdzRkYV+Kdb10XQCCA4t1KnQmfIJ7KxIywrSrf/YfrAmlqdhl3Lbr2KMhHMGKvRx+Sh/ZtaAh07B tu5gmd3NFTVJIK44ASjldI+Jx7TW6Q6Gt3NjmMS7U2cqNGLBQZp4VR3Qkc24s0w5YyeotARKWfr/W KJ2XyNsc4qojVnkb2RoITGU7kgmXBq5qqMMBAmeTWnl8p7CQhpCJkPxZs7750XSp2K9cqPdyygwpr cqXedJJYIMVZ2jQqPl5ImqkmDGl0Wx0tYxmlcq3LIIJP9wk3JmzSA6xPNqJF7pSDfedSa98CXe2lu hXdOnxxWDH+Iw1xt3dag==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4e-008ku0-8Z; Mon, 16 May 2022 15:55:56 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4D-008knU-DL for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:31 +0000 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 6777212FC; Mon, 16 May 2022 08:55:26 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 03DFE3F73D; Mon, 16 May 2022 08:55:24 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Subject: [PATCH v2 kvmtool 02/12] builtin-run: Always use RAM size in bytes Date: Mon, 16 May 2022 16:55:16 +0100 Message-Id: <20220516155526.181694-3-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085529_580387_76065D83 X-CRM114-Status: GOOD ( 15.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The user can specify the virtual machine memory size in MB, which is saved in cfg->ram_size. kvmtool validates it against the host memory size, converted from bytes to MB. ram_size is then converted to bytes, and this is how it is used throughout the rest of kvmtool. To avoid any confusion about the unit of measurement, especially once the user is allowed to specify the unit of measurement, always use ram_size in bytes. Signed-off-by: Alexandru Elisei --- builtin-run.c | 19 ++++++++++--------- include/kvm/kvm-config.h | 7 ++++--- include/kvm/kvm.h | 2 +- 3 files changed, 15 insertions(+), 13 deletions(-) diff --git a/builtin-run.c b/builtin-run.c index 0126c9fbcba6..236c59d2f86f 100644 --- a/builtin-run.c +++ b/builtin-run.c @@ -36,6 +36,7 @@ #include #include +#include #include #include @@ -264,7 +265,7 @@ static u64 host_ram_size(void) return 0; } - return (nr_pages * page_size) >> MB_SHIFT; + return nr_pages * page_size; } /* @@ -278,11 +279,11 @@ static u64 get_ram_size(int nr_cpus) u64 available; u64 ram_size; - ram_size = 64 * (nr_cpus + 3); + ram_size = SZ_64M * (nr_cpus + 3); available = host_ram_size() * RAM_SIZE_RATIO; if (!available) - available = MIN_RAM_SIZE_MB; + available = MIN_RAM_SIZE; if (ram_size > available) ram_size = available; @@ -595,13 +596,13 @@ static struct kvm *kvm_cmd_run_init(int argc, const char **argv) if (!kvm->cfg.ram_size) kvm->cfg.ram_size = get_ram_size(kvm->cfg.nrcpus); + else + kvm->cfg.ram_size <<= MB_SHIFT; if (kvm->cfg.ram_size > host_ram_size()) pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", - (unsigned long long)kvm->cfg.ram_size, - (unsigned long long)host_ram_size()); - - kvm->cfg.ram_size <<= MB_SHIFT; + (unsigned long long)kvm->cfg.ram_size >> MB_SHIFT, + (unsigned long long)host_ram_size() >> MB_SHIFT); if (!kvm->cfg.dev) kvm->cfg.dev = DEFAULT_KVM_DEV; @@ -676,12 +677,12 @@ static struct kvm *kvm_cmd_run_init(int argc, const char **argv) if (kvm->cfg.kernel_filename) { printf(" # %s run -k %s -m %Lu -c %d --name %s\n", KVM_BINARY_NAME, kvm->cfg.kernel_filename, - (unsigned long long)kvm->cfg.ram_size / 1024 / 1024, + (unsigned long long)kvm->cfg.ram_size >> MB_SHIFT, kvm->cfg.nrcpus, kvm->cfg.guest_name); } else if (kvm->cfg.firmware_filename) { printf(" # %s run --firmware %s -m %Lu -c %d --name %s\n", KVM_BINARY_NAME, kvm->cfg.firmware_filename, - (unsigned long long)kvm->cfg.ram_size / 1024 / 1024, + (unsigned long long)kvm->cfg.ram_size >> MB_SHIFT, kvm->cfg.nrcpus, kvm->cfg.guest_name); } diff --git a/include/kvm/kvm-config.h b/include/kvm/kvm-config.h index 6a5720c4c7d4..31bc89520d52 100644 --- a/include/kvm/kvm-config.h +++ b/include/kvm/kvm-config.h @@ -5,6 +5,8 @@ #include "kvm/vfio.h" #include "kvm/kvm-config-arch.h" +#include + #define DEFAULT_KVM_DEV "/dev/kvm" #define DEFAULT_CONSOLE "serial" #define DEFAULT_NETWORK "user" @@ -15,14 +17,13 @@ #define DEFAULT_SCRIPT "none" #define DEFAULT_SANDBOX_FILENAME "guest/sandbox.sh" -#define MIN_RAM_SIZE_MB (64ULL) -#define MIN_RAM_SIZE_BYTE (MIN_RAM_SIZE_MB << MB_SHIFT) +#define MIN_RAM_SIZE SZ_64M struct kvm_config { struct kvm_config_arch arch; struct disk_image_params disk_image[MAX_DISK_IMAGES]; struct vfio_device_params *vfio_devices; - u64 ram_size; + u64 ram_size; /* Guest memory size, in bytes */ u8 num_net_devices; u8 num_vfio_devices; u64 vsock_cid; diff --git a/include/kvm/kvm.h b/include/kvm/kvm.h index ad732e56f5ed..7b14b33b50ca 100644 --- a/include/kvm/kvm.h +++ b/include/kvm/kvm.h @@ -87,7 +87,7 @@ struct kvm { struct kvm_cpu **cpus; u32 mem_slots; /* for KVM_SET_USER_MEMORY_REGION */ - u64 ram_size; + u64 ram_size; /* Guest memory size, in bytes */ void *ram_start; u64 ram_pagesize; struct mutex mem_banks_lock; From patchwork Mon May 16 15:55:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851013 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 97357C433F5 for ; Mon, 16 May 2022 15:56:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=HorkGR71uR4rr2++EqElScWKa4/BIjMoV5gkggJRjXs=; b=eULuDY47vJJWBw 12BM7PqwC5cr7f3e+xcOxEiYjzVaHMrZx1fOagi6Or/QuqSs9D5HYaKtNUesfTSUJxHhjtoVqygzg lXVW+cc5bgBzpGfGAnewclHFPLZ96hfvNJphj1FwgQmNALoFYZOF/1gHavAXlCxpkUqvV8FoioBKQ heLEgod7HZAOdncS0BWKP609sJeTJcHk5Q4GlR7GnD1G9yK3yS0H+duwsBa6x9NxJeKNyjDtKFbPL TXEriYUJL9NdiyPPw+IEceftWV+AFunOJwJfEwdhrcei8SlA2DlO0pRNM8hTgPOXUUKkTzgOe/AUm 8Hk1XmMC+ZY6+I6noZBw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4V-008ksb-Mz; Mon, 16 May 2022 15:55:47 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4C-008ko8-U7 for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:30 +0000 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 193901595; Mon, 16 May 2022 08:55:28 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A686F3F73D; Mon, 16 May 2022 08:55:26 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Subject: [PATCH v2 kvmtool 03/12] builtin-run: Rework RAM size validation Date: Mon, 16 May 2022 16:55:17 +0100 Message-Id: <20220516155526.181694-4-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085529_052218_B5ECC12B X-CRM114-Status: GOOD ( 13.12 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org host_ram_size() uses sysconf() to calculate the available ram, and sysconf() can fail. When that happens, host_ram_size() returns 0. kvmtool warns the user when the configured VM ram size exceeds the size of the host's memory, but doesn't take into account that host_ram_size() can return 0. If the function returns zero, skip the warning. Since this can only happen when the user sets the memory size (via the -m/--mem command line argument), skip the check entirely if the user hasn't set it. Move the check to kvm_run_validate_cfg(), as it checks for valid user configuration. Signed-off-by: Alexandru Elisei --- builtin-run.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/builtin-run.c b/builtin-run.c index 236c59d2f86f..4491fd244f8c 100644 --- a/builtin-run.c +++ b/builtin-run.c @@ -509,6 +509,8 @@ static void kvm_run_set_real_cmdline(struct kvm *kvm) static void kvm_run_validate_cfg(struct kvm *kvm) { + u64 available_ram; + if (kvm->cfg.kernel_filename && kvm->cfg.firmware_filename) die("Only one of --kernel or --firmware can be specified"); @@ -518,6 +520,17 @@ static void kvm_run_validate_cfg(struct kvm *kvm) if (kvm->cfg.firmware_filename && kvm->cfg.initrd_filename) pr_warning("Ignoring initrd file when loading a firmware image"); + + if (kvm->cfg.ram_size) { + /* User specifies RAM size in megabytes. */ + kvm->cfg.ram_size <<= MB_SHIFT; + available_ram = host_ram_size(); + if (available_ram && kvm->cfg.ram_size > available_ram) { + pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", + (unsigned long long)kvm->cfg.ram_size >> MB_SHIFT, + (unsigned long long)available_ram >> MB_SHIFT); + } + } } static struct kvm *kvm_cmd_run_init(int argc, const char **argv) @@ -596,13 +609,6 @@ static struct kvm *kvm_cmd_run_init(int argc, const char **argv) if (!kvm->cfg.ram_size) kvm->cfg.ram_size = get_ram_size(kvm->cfg.nrcpus); - else - kvm->cfg.ram_size <<= MB_SHIFT; - - if (kvm->cfg.ram_size > host_ram_size()) - pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", - (unsigned long long)kvm->cfg.ram_size >> MB_SHIFT, - (unsigned long long)host_ram_size() >> MB_SHIFT); if (!kvm->cfg.dev) kvm->cfg.dev = DEFAULT_KVM_DEV; From patchwork Mon May 16 15:55:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851015 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BF4F0C433F5 for ; Mon, 16 May 2022 15:57:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=YuWmI8sqXNSh43eieiJEix5Y4acHgR27lSEk64KYpww=; b=SxSZLcLmGVV89i cuGiNkzuShZdWMUE1TehLYRftQTiSk5MSUBEm7C7EmnwVQx0W0W0VjwW6JSrUXWCyzhH6j97g5IWt imgWShe/TGt0Sw3WAWPFj5jpNE/e8tM8VY5LHXby13lIV60rA5kjv1Qa4xKSkzHiTdhIVVQao+FTK eXhPJwzTESUTSmWs+Pdwkne5/EIs+yttjfsSI7jU0xIUT7/j9YM2VdMyOJSW9DrSTgI+QvkVDT5zB 0UZJAy9G6HJ4qM/Cio+ncVLWu2BtfcneOQ5NiQjv9xyJ9EQJz8rjgGxC4TofFmePt5Y7DmWOySoA1 Y0ofT+noUB4pQqZd+beA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4n-008kw6-QF; Mon, 16 May 2022 15:56:05 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4F-008koq-6c for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:32 +0000 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 BD0E711FB; Mon, 16 May 2022 08:55:29 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 572CC3F73D; Mon, 16 May 2022 08:55:28 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Subject: [PATCH v2 kvmtool 04/12] builtin-run: Add arch hook to validate VM configuration Date: Mon, 16 May 2022 16:55:18 +0100 Message-Id: <20220516155526.181694-5-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085531_378717_4F9A039A X-CRM114-Status: GOOD ( 15.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Architectures are free to set their own command line options. Add an architecture specific hook to validate these options. For now, the hook does nothing, but it will be used in later patches. Signed-off-by: Alexandru Elisei --- Makefile | 1 + arm/aarch32/kvm.c | 5 +++++ arm/aarch64/kvm.c | 4 ++++ builtin-run.c | 2 ++ include/kvm/kvm.h | 1 + mips/kvm.c | 4 ++++ powerpc/kvm.c | 4 ++++ riscv/kvm.c | 4 ++++ x86/kvm.c | 4 ++++ 9 files changed, 29 insertions(+) create mode 100644 arm/aarch32/kvm.c diff --git a/Makefile b/Makefile index 9e67c7637b1e..25d79637b561 100644 --- a/Makefile +++ b/Makefile @@ -168,6 +168,7 @@ ifeq ($(ARCH), arm) OBJS += $(OBJS_ARM_COMMON) OBJS += arm/aarch32/arm-cpu.o OBJS += arm/aarch32/kvm-cpu.o + OBJS += arm/aarch32/kvm.o ARCH_INCLUDE := $(HDRS_ARM_COMMON) ARCH_INCLUDE += -Iarm/aarch32/include CFLAGS += -march=armv7-a diff --git a/arm/aarch32/kvm.c b/arm/aarch32/kvm.c new file mode 100644 index 000000000000..ae33ac92479a --- /dev/null +++ b/arm/aarch32/kvm.c @@ -0,0 +1,5 @@ +#include "kvm/kvm.h" + +void kvm__arch_validate_cfg(struct kvm *kvm) +{ +} diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c index 1b992dd592d4..46f20e5a5a86 100644 --- a/arm/aarch64/kvm.c +++ b/arm/aarch64/kvm.c @@ -37,6 +37,10 @@ int vcpu_affinity_parser(const struct option *opt, const char *arg, int unset) return 0; } +void kvm__arch_validate_cfg(struct kvm *kvm) +{ +} + /* * Return the TEXT_OFFSET value that the guest kernel expects. Note * that pre-3.17 kernels expose this value using the native endianness diff --git a/builtin-run.c b/builtin-run.c index 4491fd244f8c..2c37b91b6574 100644 --- a/builtin-run.c +++ b/builtin-run.c @@ -531,6 +531,8 @@ static void kvm_run_validate_cfg(struct kvm *kvm) (unsigned long long)available_ram >> MB_SHIFT); } } + + kvm__arch_validate_cfg(kvm); } static struct kvm *kvm_cmd_run_init(int argc, const char **argv) diff --git a/include/kvm/kvm.h b/include/kvm/kvm.h index 7b14b33b50ca..9f7b2fb26e95 100644 --- a/include/kvm/kvm.h +++ b/include/kvm/kvm.h @@ -187,6 +187,7 @@ int kvm__get_sock_by_instance(const char *name); int kvm__enumerate_instances(int (*callback)(const char *name, int pid)); void kvm__remove_socket(const char *name); +void kvm__arch_validate_cfg(struct kvm *kvm); void kvm__arch_set_cmdline(char *cmdline, bool video); void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size); void kvm__arch_delete_ram(struct kvm *kvm); diff --git a/mips/kvm.c b/mips/kvm.c index 3470dbb2e433..f5b137f46dff 100644 --- a/mips/kvm.c +++ b/mips/kvm.c @@ -12,6 +12,10 @@ struct kvm_ext kvm_req_ext[] = { { 0, 0 } }; +void kvm__arch_validate_cfg(struct kvm *kvm) +{ +} + void kvm__arch_read_term(struct kvm *kvm) { virtio_console__inject_interrupt(kvm); diff --git a/powerpc/kvm.c b/powerpc/kvm.c index 702d67dca614..3215b579f5dc 100644 --- a/powerpc/kvm.c +++ b/powerpc/kvm.c @@ -48,6 +48,10 @@ struct kvm_ext kvm_req_ext[] = { { 0, 0 } }; +void kvm__arch_validate_cfg(struct kvm *kvm) +{ +} + static uint32_t mfpvr(void) { uint32_t r; diff --git a/riscv/kvm.c b/riscv/kvm.c index 84e02779a91c..7fb496282f4c 100644 --- a/riscv/kvm.c +++ b/riscv/kvm.c @@ -13,6 +13,10 @@ struct kvm_ext kvm_req_ext[] = { { 0, 0 }, }; +void kvm__arch_validate_cfg(struct kvm *kvm) +{ +} + bool kvm__arch_cpu_supports_vm(void) { /* The KVM capability check is enough. */ diff --git a/x86/kvm.c b/x86/kvm.c index 3e0f0b743f8c..6683a5c81d49 100644 --- a/x86/kvm.c +++ b/x86/kvm.c @@ -35,6 +35,10 @@ struct kvm_ext kvm_req_ext[] = { { 0, 0 } }; +void kvm__arch_validate_cfg(struct kvm *kvm) +{ +} + bool kvm__arch_cpu_supports_vm(void) { struct cpuid_regs regs; From patchwork Mon May 16 15:55:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851016 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C2650C433F5 for ; Mon, 16 May 2022 15:57:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=MN3QcLOCWoUYkzJ3h1CFx94+OUYGJYDvjo9XtyowY9k=; b=CCB7dyE6bhXY6a AjfJ2NLswmafNKhxU/QxIEkngsEwmq/b6t3p8Zbxe3FdV240JajchCWV7bGqa4boOKJOuK3fEAf/v +99P571l7ZaQJdAOch0ckBOA7r7BsqsLfu/SWSrAKNYe5Nc7aJuoSZ5Lr1ftUwzf3vA9VYGHHK1AB jU8sRpdUvPdO89yEJKTHHPvBM0y5bJskj+Wexoynmw6kjcHw8UdnsTITOZlIvzfmyjOvmnDDXNXpo 9QJZPA51DYkVGV9vTZ1oaqdN2Psn62QEc6WspW/FQtNVFoPKvOgLsnQbLMxnTJUr/TVc/9znWSB9N jos9Xsddlb3SwpqZorug==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4x-008kz8-65; Mon, 16 May 2022 15:56:15 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4G-008kpJ-8U for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:33 +0000 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 6AFD31063; Mon, 16 May 2022 08:55:31 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 051CA3F881; Mon, 16 May 2022 08:55:29 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Subject: [PATCH v2 kvmtool 05/12] arm/arm64: Fail if RAM size is too large for 32-bit guests Date: Mon, 16 May 2022 16:55:19 +0100 Message-Id: <20220516155526.181694-6-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085532_387674_D88A399D X-CRM114-Status: GOOD ( 11.30 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org For 64-bit guests, kvmtool exists with an error in kvm__get_vm_type() if the memory size is larger than what KVM supports. For 32-bit guests, the RAM size is silently rounded down to ARM_LOMAP_MAX_MEMORY in kvm__arch_init(). Be consistent and exit with an error when the user has configured the wrong RAM size for 32-bit guests. Signed-off-by: Alexandru Elisei --- arm/aarch32/kvm.c | 4 ++++ arm/aarch64/kvm.c | 5 +++++ arm/kvm.c | 2 +- 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/arm/aarch32/kvm.c b/arm/aarch32/kvm.c index ae33ac92479a..9d68d7a15ee2 100644 --- a/arm/aarch32/kvm.c +++ b/arm/aarch32/kvm.c @@ -2,4 +2,8 @@ void kvm__arch_validate_cfg(struct kvm *kvm) { + if (kvm->cfg.ram_size > ARM_LOMAP_MAX_MEMORY) { + die("RAM size 0x%llx exceeds maximum allowed 0x%llx", + kvm->cfg.ram_size, ARM_LOMAP_MAX_MEMORY); + } } diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c index 46f20e5a5a86..5db8e295c433 100644 --- a/arm/aarch64/kvm.c +++ b/arm/aarch64/kvm.c @@ -39,6 +39,11 @@ int vcpu_affinity_parser(const struct option *opt, const char *arg, int unset) void kvm__arch_validate_cfg(struct kvm *kvm) { + if (kvm->cfg.arch.aarch32_guest && + kvm->cfg.ram_size > ARM_LOMAP_MAX_MEMORY) { + die("RAM size 0x%llx exceeds maximum allowed 0x%llx", + kvm->cfg.ram_size, ARM_LOMAP_MAX_MEMORY); + } } /* diff --git a/arm/kvm.c b/arm/kvm.c index c5913000e1ed..af0feae495d7 100644 --- a/arm/kvm.c +++ b/arm/kvm.c @@ -65,7 +65,7 @@ void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size) * If using THP, then our minimal alignment becomes 2M. * 2M trumps 64K, so let's go with that. */ - kvm->ram_size = min(ram_size, (u64)ARM_MAX_MEMORY(kvm)); + kvm->ram_size = ram_size; kvm->arch.ram_alloc_size = kvm->ram_size + SZ_2M; kvm->arch.ram_alloc_start = mmap_anon_or_hugetlbfs(kvm, hugetlbfs_path, kvm->arch.ram_alloc_size); From patchwork Mon May 16 15:55:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851017 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 123FFC433F5 for ; Mon, 16 May 2022 15:57:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2MTlipO/nbxWzkxx5+u3sA41mscmR1fSvUk4XGtff/g=; b=gEUoFoTTY8R+mI QImOkko17N1DmMvzKfoEKEy6jovT+bLZOR/bTTpld73oIXdaMWNaeSeWtVpxV5EwebJBWTFnrqYdJ YVnMHv9v/R8IGLEW2frSzxK3f7dwlOh4t//Eby4QkSEhhQGM4PdKGexYSNulXartRfMaZxa1KO0Fe u/eKC2cE3zWoT5YkrD6bnkFTvuOH+7NeteeeAbJHJbX2KabLK4TcGvHauvkfbfwLdVvAA4dvEW2lK vwwcoP5kFybarNwsO2V+ElnYnYwurDRY0dwobidV37iUewdXaYUVJHRw9+yaP+yxmQTmXo+86wtvj +C1y9J7rc662LuI3K+KA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd57-008l3h-SA; Mon, 16 May 2022 15:56:26 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4H-008koq-LN for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:35 +0000 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 19DCE11FB; Mon, 16 May 2022 08:55:33 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A93F13F73D; Mon, 16 May 2022 08:55:31 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Subject: [PATCH v2 kvmtool 06/12] arm/arm64: Kill the ARM_MAX_MEMORY() macro Date: Mon, 16 May 2022 16:55:20 +0100 Message-Id: <20220516155526.181694-7-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085533_780734_29061791 X-CRM114-Status: UNSURE ( 8.58 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org For 32-bit guests, the maximum memory size is represented by the define ARM_LOMAP_MAX_MEMORY, which ARM_MAX_MEMORY() returns. For 64-bit guests, the RAM size is checked against the maximum allowed by KVM in kvm__get_vm_type(). There are no users left for the ARM_MAX_MEMORY() macro, remove it. Signed-off-by: Alexandru Elisei --- arm/aarch32/include/kvm/kvm-arch.h | 2 -- arm/aarch64/include/kvm/kvm-arch.h | 16 ---------------- 2 files changed, 18 deletions(-) diff --git a/arm/aarch32/include/kvm/kvm-arch.h b/arm/aarch32/include/kvm/kvm-arch.h index 5616b27e257e..467fb09175b8 100644 --- a/arm/aarch32/include/kvm/kvm-arch.h +++ b/arm/aarch32/include/kvm/kvm-arch.h @@ -8,8 +8,6 @@ struct kvm; static inline void kvm__arch_enable_mte(struct kvm *kvm) {} -#define ARM_MAX_MEMORY(...) ARM_LOMAP_MAX_MEMORY - #define MAX_PAGE_SIZE SZ_4K #include "arm-common/kvm-arch.h" diff --git a/arm/aarch64/include/kvm/kvm-arch.h b/arm/aarch64/include/kvm/kvm-arch.h index 9124f6919d0f..ff857ca6e7b4 100644 --- a/arm/aarch64/include/kvm/kvm-arch.h +++ b/arm/aarch64/include/kvm/kvm-arch.h @@ -8,22 +8,6 @@ unsigned long long kvm__arch_get_kern_offset(struct kvm *kvm, int fd); int kvm__arch_get_ipa_limit(struct kvm *kvm); void kvm__arch_enable_mte(struct kvm *kvm); -#define ARM_MAX_MEMORY(kvm) ({ \ - u64 max_ram; \ - \ - if ((kvm)->cfg.arch.aarch32_guest) { \ - max_ram = ARM_LOMAP_MAX_MEMORY; \ - } else { \ - int ipabits = kvm__arch_get_ipa_limit(kvm); \ - if (ipabits <= 0) \ - max_ram = ARM_HIMAP_MAX_MEMORY; \ - else \ - max_ram = (1ULL << ipabits) - ARM_MEMORY_AREA; \ - } \ - \ - max_ram; \ -}) - #define MAX_PAGE_SIZE SZ_64K #include "arm-common/kvm-arch.h" From patchwork Mon May 16 15:55:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851019 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5A908C433F5 for ; Mon, 16 May 2022 15:57:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ZFIM0hci2Xvk9eLW3BIZxnFsp7QYP7q6RutGLQCJLXM=; b=AqOB0C7jjJReZu 95iQjV2Of51/syYG60AJdWYb7p/Qp5o2MjYBohEgApD5Nj0Kv0zhLcWNddQduMQUYAD10R2T9m1ip GmyA1YsE9M9g+2iLitVrMu79i1dKR0zGAW/cgkDhuSKT0Nlsg+iAFHbeHhc/91fmV7K3Oi7Ih8cty mt1I136zGlFC48UF9Je+qaUj7GOiMjJraDDzeF0T7dxAo+2KXb2uFuOhe5SEqXG9ychaGsGsAFOUY H+ydFxK+8dFREtNRWniqyL4ZOKd6VTR8AwDzkcQPJkVvfteRjnf4MX0qewlT3D+Kot2ndVChGhXEZ Kw7e9RR1m1+u+7iblrDA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd5V-008lIP-1x; Mon, 16 May 2022 15:56:49 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4J-008kpv-IX for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:36 +0000 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 BC33812FC; Mon, 16 May 2022 08:55:34 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 57A8D3F73D; Mon, 16 May 2022 08:55:33 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Subject: [PATCH v2 kvmtool 07/12] arm/arm64: Kill the ARM_HIMAP_MAX_MEMORY() macro Date: Mon, 16 May 2022 16:55:21 +0100 Message-Id: <20220516155526.181694-8-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085535_693137_070975EF X-CRM114-Status: UNSURE ( 8.08 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The ARM_HIMAP_MAX_MEMORY() is a remnant of a time when KVM only supported 40 bits if IPA. There are no users left for this macro, remove it. Signed-off-by: Alexandru Elisei --- arm/include/arm-common/kvm-arch.h | 1 - 1 file changed, 1 deletion(-) diff --git a/arm/include/arm-common/kvm-arch.h b/arm/include/arm-common/kvm-arch.h index fc55360d4d15..6d80aac17125 100644 --- a/arm/include/arm-common/kvm-arch.h +++ b/arm/include/arm-common/kvm-arch.h @@ -65,7 +65,6 @@ #define ARM_LOMAP_MAX_MEMORY ((1ULL << 32) - ARM_MEMORY_AREA) -#define ARM_HIMAP_MAX_MEMORY ((1ULL << 40) - ARM_MEMORY_AREA) #define KVM_IOEVENTFD_HAS_PIO 0 From patchwork Mon May 16 15:55:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851020 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9FB7BC433EF for ; Mon, 16 May 2022 15:58:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aVQdfh+8nXjviZhLqw7ZKFhcdYE3mWibJ4yCOSS6HKo=; b=LCljMvtu9i0H0j 9+kxLrwrk2wdae41Dk9vg67lyESI0AULKOM/aOUNiX2kNvYnHrSd60oWuhaIw24PVHjHQGy31/9NQ bsVtGRBvseuvMTdpSVC0ANac7LqJVt9grIqb3vx8gEQqvgESWT0/FURN5rWNauLNXB+0eR9o6ybm1 SZ1rMoCm++3Hr5EHw4DmpmgkKOvowsef3KDBCE3sBbW4lmuaqp0VKIA/GqZd2Qt1508BMqAvsTgW3 jKxikZOeT/9J018YWGgffuOOocI9B+vrrs/RVAC7jH/rqv8GlUzsVlse6JuwJV5oNJ1UCn0UAsVP3 Gitwrp44VoAGS9a7p3Eg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd5h-008lQf-Ie; Mon, 16 May 2022 15:57:01 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4K-008koq-Vk for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:38 +0000 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 69B171063; Mon, 16 May 2022 08:55:36 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0515B3F73D; Mon, 16 May 2022 08:55:34 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Subject: [PATCH v2 kvmtool 08/12] builtin_run: Allow standard size specifiers for memory Date: Mon, 16 May 2022 16:55:22 +0100 Message-Id: <20220516155526.181694-9-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085537_143352_35374305 X-CRM114-Status: GOOD ( 14.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Suzuki K Poulose Allow the user to use the standard B (bytes), K (kilobytes), M (megabytes), G (gigabytes), T (terabytes) and P (petabytes) suffixes for memory size. When none are specified, the default is megabytes. Also raise an error if the guest specifies 0 as the memory size, instead of treating it as uninitialized, as kvmtool has done so far. Signed-off-by: Suzuki K Poulose Signed-off-by: Alexandru Elisei --- builtin-run.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 60 insertions(+), 5 deletions(-) diff --git a/builtin-run.c b/builtin-run.c index 2c37b91b6574..57c58be55159 100644 --- a/builtin-run.c +++ b/builtin-run.c @@ -49,9 +49,11 @@ #include #include -#define MB_SHIFT (20) #define KB_SHIFT (10) +#define MB_SHIFT (20) #define GB_SHIFT (30) +#define TB_SHIFT (40) +#define PB_SHIFT (50) __thread struct kvm_cpu *current_kvm_cpu; @@ -87,6 +89,60 @@ void kvm_run_set_wrapper_sandbox(void) kvm_run_wrapper = KVM_RUN_SANDBOX; } +static int parse_mem_unit(char **next) +{ + int shift = -1; + + switch (**next) { + case 'B': case 'b': shift = 0; break; + case 'K': case 'k': shift = KB_SHIFT; break; + case 'M': case 'm': shift = MB_SHIFT; break; + case 'G': case 'g': shift = GB_SHIFT; break; + case 'T': case 't': shift = TB_SHIFT; break; + case 'P': case 'p': shift = PB_SHIFT; break; + } + + if (shift == -1) { + /* The default is megabytes. */ + shift = MB_SHIFT; + } else { + (*next)++; + } + + return shift; +} + +static u64 parse_mem_option(const char *nptr, char **next) +{ + u64 shift; + u64 val; + + val = strtoull(nptr, next, 10); + if (errno == ERANGE) + die("Memory too large: %s", nptr); + shift = parse_mem_unit(next); + + if ((val << shift) < val) + die("Memory too large: %s", nptr); + + return val << shift; +} + +static int mem_parser(const struct option *opt, const char *arg, int unset) +{ + struct kvm *kvm = opt->ptr; + char *next; + + kvm->cfg.ram_size = parse_mem_option(arg, &next); + if (kvm->cfg.ram_size == 0) + die("Invalid RAM size: %s", arg); + + if (*next != '\0') + die("Invalid memory specifier: %s", arg); + + return 0; +} + #ifndef OPT_ARCH_RUN #define OPT_ARCH_RUN(...) #endif @@ -97,8 +153,9 @@ void kvm_run_set_wrapper_sandbox(void) OPT_STRING('\0', "name", &(cfg)->guest_name, "guest name", \ "A name for the guest"), \ OPT_INTEGER('c', "cpus", &(cfg)->nrcpus, "Number of CPUs"), \ - OPT_U64('m', "mem", &(cfg)->ram_size, "Virtual machine memory" \ - " size in MB."), \ + OPT_CALLBACK('m', "mem", NULL, "size[BKMGTP]", \ + "Virtual machine memory size, by default measured" \ + " in megabytes (M)", mem_parser, kvm), \ OPT_CALLBACK('d', "disk", kvm, "image or rootfs_dir", "Disk " \ " image or rootfs directory", img_name_parser, \ kvm), \ @@ -522,8 +579,6 @@ static void kvm_run_validate_cfg(struct kvm *kvm) pr_warning("Ignoring initrd file when loading a firmware image"); if (kvm->cfg.ram_size) { - /* User specifies RAM size in megabytes. */ - kvm->cfg.ram_size <<= MB_SHIFT; available_ram = host_ram_size(); if (available_ram && kvm->cfg.ram_size > available_ram) { pr_warning("Guest memory size %lluMB exceeds host physical RAM size %lluMB", From patchwork Mon May 16 15:55:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851021 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C89DEC433F5 for ; Mon, 16 May 2022 15:58:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=WAPe3yX+nnbPu8UADNVCyhKSjcnl2lrOpRZxRmWew/0=; b=NYu5C2H9/9BzXb dTD6BSFF8mdoxECnmLc42AnCscg1VxjgFi5uIhZi2/x5cF0vzyZ4Dz8HeUDK7AedFqemFlY+ev7yB r3vNadTrY5NHy5FJ7wfgsk+v03unTMLHOjyeGzXfh3bzmY4Y/ofVW/1RcIOoVfjuu21LtYEbGVqQo ax4CK5aBF+Cio8m24EIDDHYiGZ0maFn2WjWUQ0msBau1tsL+u9qOk7btuFXqYELNFBpnCuxejeRY0 yVJemKF9viUW5dCQoxMqyLeu+z7uhrXzw3X6AAwENQghz3/wrN6JSt5R6xA5yACSVplyV+zyO5Cac q81fnP19S39GF9+Tfnbw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd5y-008lc9-7Z; Mon, 16 May 2022 15:57:18 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4M-008kqZ-Ri for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:40 +0000 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 3A88411FB; Mon, 16 May 2022 08:55:38 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A839F3F73D; Mon, 16 May 2022 08:55:36 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Cc: Julien Grall Subject: [PATCH v2 kvmtool 09/12] kvm__arch_init: Remove hugetlbfs_path and ram_size as parameters Date: Mon, 16 May 2022 16:55:23 +0100 Message-Id: <20220516155526.181694-10-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085539_037426_BC9EEA58 X-CRM114-Status: GOOD ( 12.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Julien Grall The kvm struct already contains a pointer to the configuration, which contains both hugetlbfs_path and ram_size, so is it not necessary to pass them as arguments to kvm__arch_init(). Signed-off-by: Julien Grall Signed-off-by: Alexandru Elisei --- arm/kvm.c | 7 ++++--- include/kvm/kvm.h | 2 +- kvm.c | 2 +- mips/kvm.c | 7 ++++--- powerpc/kvm.c | 5 +++-- riscv/kvm.c | 7 ++++--- x86/kvm.c | 4 +++- 7 files changed, 20 insertions(+), 14 deletions(-) diff --git a/arm/kvm.c b/arm/kvm.c index af0feae495d7..bd44aa350796 100644 --- a/arm/kvm.c +++ b/arm/kvm.c @@ -57,7 +57,7 @@ void kvm__arch_set_cmdline(char *cmdline, bool video) { } -void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size) +void kvm__arch_init(struct kvm *kvm) { /* * Allocate guest memory. We must align our buffer to 64K to @@ -65,9 +65,10 @@ void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size) * If using THP, then our minimal alignment becomes 2M. * 2M trumps 64K, so let's go with that. */ - kvm->ram_size = ram_size; + kvm->ram_size = kvm->cfg.ram_size; kvm->arch.ram_alloc_size = kvm->ram_size + SZ_2M; - kvm->arch.ram_alloc_start = mmap_anon_or_hugetlbfs(kvm, hugetlbfs_path, + kvm->arch.ram_alloc_start = mmap_anon_or_hugetlbfs(kvm, + kvm->cfg.hugetlbfs_path, kvm->arch.ram_alloc_size); if (kvm->arch.ram_alloc_start == MAP_FAILED) diff --git a/include/kvm/kvm.h b/include/kvm/kvm.h index 9f7b2fb26e95..640b76c095f9 100644 --- a/include/kvm/kvm.h +++ b/include/kvm/kvm.h @@ -189,7 +189,7 @@ void kvm__remove_socket(const char *name); void kvm__arch_validate_cfg(struct kvm *kvm); void kvm__arch_set_cmdline(char *cmdline, bool video); -void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size); +void kvm__arch_init(struct kvm *kvm); void kvm__arch_delete_ram(struct kvm *kvm); int kvm__arch_setup_firmware(struct kvm *kvm); int kvm__arch_free_firmware(struct kvm *kvm); diff --git a/kvm.c b/kvm.c index 952ef1fbb41c..42b881217df6 100644 --- a/kvm.c +++ b/kvm.c @@ -479,7 +479,7 @@ int kvm__init(struct kvm *kvm) goto err_vm_fd; } - kvm__arch_init(kvm, kvm->cfg.hugetlbfs_path, kvm->cfg.ram_size); + kvm__arch_init(kvm); INIT_LIST_HEAD(&kvm->mem_banks); kvm__init_ram(kvm); diff --git a/mips/kvm.c b/mips/kvm.c index f5b137f46dff..d8610cf81b94 100644 --- a/mips/kvm.c +++ b/mips/kvm.c @@ -61,12 +61,13 @@ void kvm__arch_set_cmdline(char *cmdline, bool video) } /* Architecture-specific KVM init */ -void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size) +void kvm__arch_init(struct kvm *kvm) { int ret; - kvm->ram_start = mmap_anon_or_hugetlbfs(kvm, hugetlbfs_path, ram_size); - kvm->ram_size = ram_size; + kvm->ram_size = kvm->cfg.ram_size; + kvm->ram_start = mmap_anon_or_hugetlbfs(kvm, kvm->cfg.hugetlbfs_path, + kvm->ram_size); if (kvm->ram_start == MAP_FAILED) die("out of memory"); diff --git a/powerpc/kvm.c b/powerpc/kvm.c index 3215b579f5dc..d281b070fd0e 100644 --- a/powerpc/kvm.c +++ b/powerpc/kvm.c @@ -92,12 +92,13 @@ void kvm__arch_set_cmdline(char *cmdline, bool video) } /* Architecture-specific KVM init */ -void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size) +void kvm__arch_init(struct kvm *kvm) { + const char *hugetlbfs_path = kvm->cfg.hugetlbfs_path; int cap_ppc_rma; unsigned long hpt; - kvm->ram_size = ram_size; + kvm->ram_size = kvm->cfg.ram_size; /* Map "default" hugetblfs path to the standard 16M mount point */ if (hugetlbfs_path && !strcmp(hugetlbfs_path, "default")) diff --git a/riscv/kvm.c b/riscv/kvm.c index 7fb496282f4c..c46660772aa0 100644 --- a/riscv/kvm.c +++ b/riscv/kvm.c @@ -56,7 +56,7 @@ void kvm__arch_set_cmdline(char *cmdline, bool video) { } -void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size) +void kvm__arch_init(struct kvm *kvm) { /* * Allocate guest memory. We must align our buffer to 64K to @@ -64,9 +64,10 @@ void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size) * If using THP, then our minimal alignment becomes 2M. * 2M trumps 64K, so let's go with that. */ - kvm->ram_size = min(ram_size, (u64)RISCV_MAX_MEMORY(kvm)); + kvm->ram_size = min(kvm->cfg.ram_size, (u64)RISCV_MAX_MEMORY(kvm)); kvm->arch.ram_alloc_size = kvm->ram_size + SZ_2M; - kvm->arch.ram_alloc_start = mmap_anon_or_hugetlbfs(kvm, hugetlbfs_path, + kvm->arch.ram_alloc_start = mmap_anon_or_hugetlbfs(kvm, + kvm->cfg.hugetlbfs_path, kvm->arch.ram_alloc_size); if (kvm->arch.ram_alloc_start == MAP_FAILED) diff --git a/x86/kvm.c b/x86/kvm.c index 6683a5c81d49..24b0305a1841 100644 --- a/x86/kvm.c +++ b/x86/kvm.c @@ -134,9 +134,11 @@ void kvm__arch_set_cmdline(char *cmdline, bool video) } /* Architecture-specific KVM init */ -void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size) +void kvm__arch_init(struct kvm *kvm) { + const char *hugetlbfs_path = kvm->cfg.hugetlbfs_path; struct kvm_pit_config pit_config = { .flags = 0, }; + u64 ram_size = kvm->cfg.ram_size; int ret; ret = ioctl(kvm->vm_fd, KVM_SET_TSS_ADDR, 0xfffbd000); From patchwork Mon May 16 15:55:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851022 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6E004C433FE for ; Mon, 16 May 2022 15:58:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=bW9dVy48syr1vh3lqMwURQnyJEMW0LZkjtnctQuCiL8=; b=XWWtZl93LXSBMJ SlMfRolOoqpYsgjfIE/SBkKkvWNL/JEvwa7a+/4XKv3Cop3d7nUx8iYRjfe/LTwUsd81WHU+vYbyO F4W1p4Fp9uJ8hM2V19lF14JEtQh7h+95JKdewgwfLSlp0Tpmju8BUT+uShsThtkeoLU47rW4G926r jzazdcne1ZwfPLZJ/SbfDKrCJjU2D/et8To6nSV7dOUtwWHW8pUKv0S1StGnl60+/ffY1bnHN8mNC P0dQpJJtI4BrT+XfV0047xFH22S3dHkyh9Sklk0U/KQAKwfByegy5QSDXpy8OnAWxknW5CMdYNU4R p256/qjtiYVICzLPc03Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd6F-008lni-N1; Mon, 16 May 2022 15:57:35 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4P-008kqZ-BQ for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:43 +0000 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 0F7EB1063; Mon, 16 May 2022 08:55:40 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 78DA93F73D; Mon, 16 May 2022 08:55:38 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Cc: Julien Grall Subject: [PATCH v2 kvmtool 10/12] arm/arm64: Consolidate RAM initialization in kvm__init_ram() Date: Mon, 16 May 2022 16:55:24 +0100 Message-Id: <20220516155526.181694-11-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085541_540925_E05E6AB6 X-CRM114-Status: GOOD ( 13.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Julien Grall RAM initialization is unnecessarily split between kvm__init_ram() and kvm__arch_init(). Move all code related to RAM initialization to kvm__init_ram(), making the code easier to follow and to modify. One thing to note is that the initialization order is slightly altered: kvm__arch_enable_mte() and gic__create() are now called before mmap'ing the guest RAM. That is perfectly fine, as they don't use the host's mapping of the guest memory. Signed-off-by: Julien Grall Signed-off-by: Alexandru Elisei --- arm/kvm.c | 52 ++++++++++++++++++++++++++-------------------------- 1 file changed, 26 insertions(+), 26 deletions(-) diff --git a/arm/kvm.c b/arm/kvm.c index bd44aa350796..abcccfabf59e 100644 --- a/arm/kvm.c +++ b/arm/kvm.c @@ -26,9 +26,34 @@ bool kvm__arch_cpu_supports_vm(void) void kvm__init_ram(struct kvm *kvm) { - int err; u64 phys_start, phys_size; void *host_mem; + int err; + + /* + * Allocate guest memory. We must align our buffer to 64K to + * correlate with the maximum guest page size for virtio-mmio. + * If using THP, then our minimal alignment becomes 2M. + * 2M trumps 64K, so let's go with that. + */ + kvm->ram_size = kvm->cfg.ram_size; + kvm->arch.ram_alloc_size = kvm->ram_size + SZ_2M; + kvm->arch.ram_alloc_start = mmap_anon_or_hugetlbfs(kvm, + kvm->cfg.hugetlbfs_path, + kvm->arch.ram_alloc_size); + + if (kvm->arch.ram_alloc_start == MAP_FAILED) + die("Failed to map %lld bytes for guest memory (%d)", + kvm->arch.ram_alloc_size, errno); + + kvm->ram_start = (void *)ALIGN((unsigned long)kvm->arch.ram_alloc_start, + SZ_2M); + + madvise(kvm->arch.ram_alloc_start, kvm->arch.ram_alloc_size, + MADV_MERGEABLE); + + madvise(kvm->arch.ram_alloc_start, kvm->arch.ram_alloc_size, + MADV_HUGEPAGE); phys_start = ARM_MEMORY_AREA; phys_size = kvm->ram_size; @@ -59,31 +84,6 @@ void kvm__arch_set_cmdline(char *cmdline, bool video) void kvm__arch_init(struct kvm *kvm) { - /* - * Allocate guest memory. We must align our buffer to 64K to - * correlate with the maximum guest page size for virtio-mmio. - * If using THP, then our minimal alignment becomes 2M. - * 2M trumps 64K, so let's go with that. - */ - kvm->ram_size = kvm->cfg.ram_size; - kvm->arch.ram_alloc_size = kvm->ram_size + SZ_2M; - kvm->arch.ram_alloc_start = mmap_anon_or_hugetlbfs(kvm, - kvm->cfg.hugetlbfs_path, - kvm->arch.ram_alloc_size); - - if (kvm->arch.ram_alloc_start == MAP_FAILED) - die("Failed to map %lld bytes for guest memory (%d)", - kvm->arch.ram_alloc_size, errno); - - kvm->ram_start = (void *)ALIGN((unsigned long)kvm->arch.ram_alloc_start, - SZ_2M); - - madvise(kvm->arch.ram_alloc_start, kvm->arch.ram_alloc_size, - MADV_MERGEABLE); - - madvise(kvm->arch.ram_alloc_start, kvm->arch.ram_alloc_size, - MADV_HUGEPAGE); - /* Create the virtual GIC. */ if (gic__create(kvm, kvm->cfg.arch.irqchip)) die("Failed to create virtual GIC"); From patchwork Mon May 16 15:55:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851023 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C9058C433F5 for ; Mon, 16 May 2022 15:58:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=A59PWInjArPU2CTrKRHfclIgfRdNwMbBU60LKFaLMj0=; b=tG15xBbDPfzGZe q5AWMk2Y4iAivN4XhYOptav9SqClx/oE70ZTxjyF2CCPhLLEKlZ8GcLeepVQ/IJHrmPcTrkwprMwG CdD2rgImJNSeywdUggXu/uJHbjHdcKMwavWpDk8LYSTg9F8b3XLiAXdwHgCbtFQZ60uas/oa+X3EN 4YCUl867/Kt1fCpdiCGJIBuTIyWm07XLxgcrzQ4cQbtwEiKt3TbjX/2mwFxcrkyIT+fILvuRVk5MY NIO0+hbHkT0rFfRgD6Tdg4nmmz8YAom5Kbe3Aq0I2oPC9AvJeDt2bylNiwYuNvAj1psxEIRW/e9zK 8y6nxPiTBrITN5K5ZCRw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd6W-008lyf-BK; Mon, 16 May 2022 15:57:52 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4Q-008kra-7s for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:43 +0000 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 B259311FB; Mon, 16 May 2022 08:55:41 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4D8B83F73D; Mon, 16 May 2022 08:55:40 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Subject: [PATCH v2 kvmtool 11/12] Introduce kvm__arch_default_ram_address() Date: Mon, 16 May 2022 16:55:25 +0100 Message-Id: <20220516155526.181694-12-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085542_373063_8AFFA38B X-CRM114-Status: GOOD ( 10.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a new function, kvm__arch_default_ram_address(), which returns the default address for guest RAM for each architecture. Signed-off-by: Alexandru Elisei --- arm/aarch32/kvm.c | 5 +++++ arm/aarch64/kvm.c | 5 +++++ include/kvm/kvm.h | 1 + mips/kvm.c | 5 +++++ powerpc/kvm.c | 5 +++++ riscv/kvm.c | 5 +++++ x86/kvm.c | 5 +++++ 7 files changed, 31 insertions(+) diff --git a/arm/aarch32/kvm.c b/arm/aarch32/kvm.c index 9d68d7a15ee2..768a56bbb5b4 100644 --- a/arm/aarch32/kvm.c +++ b/arm/aarch32/kvm.c @@ -7,3 +7,8 @@ void kvm__arch_validate_cfg(struct kvm *kvm) kvm->cfg.ram_size, ARM_LOMAP_MAX_MEMORY); } } + +u64 kvm__arch_default_ram_address(void) +{ + return ARM_MEMORY_AREA; +} diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c index 5db8e295c433..af8e7eae0da2 100644 --- a/arm/aarch64/kvm.c +++ b/arm/aarch64/kvm.c @@ -46,6 +46,11 @@ void kvm__arch_validate_cfg(struct kvm *kvm) } } +u64 kvm__arch_default_ram_address(void) +{ + return ARM_MEMORY_AREA; +} + /* * Return the TEXT_OFFSET value that the guest kernel expects. Note * that pre-3.17 kernels expose this value using the native endianness diff --git a/include/kvm/kvm.h b/include/kvm/kvm.h index 640b76c095f9..360430b78b1e 100644 --- a/include/kvm/kvm.h +++ b/include/kvm/kvm.h @@ -190,6 +190,7 @@ void kvm__remove_socket(const char *name); void kvm__arch_validate_cfg(struct kvm *kvm); void kvm__arch_set_cmdline(char *cmdline, bool video); void kvm__arch_init(struct kvm *kvm); +u64 kvm__arch_default_ram_address(void); void kvm__arch_delete_ram(struct kvm *kvm); int kvm__arch_setup_firmware(struct kvm *kvm); int kvm__arch_free_firmware(struct kvm *kvm); diff --git a/mips/kvm.c b/mips/kvm.c index d8610cf81b94..4cbc9907731b 100644 --- a/mips/kvm.c +++ b/mips/kvm.c @@ -12,6 +12,11 @@ struct kvm_ext kvm_req_ext[] = { { 0, 0 } }; +u64 kvm__arch_default_ram_address(void) +{ + return 0; +} + void kvm__arch_validate_cfg(struct kvm *kvm) { } diff --git a/powerpc/kvm.c b/powerpc/kvm.c index d281b070fd0e..7b0d0669aff4 100644 --- a/powerpc/kvm.c +++ b/powerpc/kvm.c @@ -48,6 +48,11 @@ struct kvm_ext kvm_req_ext[] = { { 0, 0 } }; +u64 kvm__arch_default_ram_address(void) +{ + return 0; +} + void kvm__arch_validate_cfg(struct kvm *kvm) { } diff --git a/riscv/kvm.c b/riscv/kvm.c index c46660772aa0..4d6f5cb57ac8 100644 --- a/riscv/kvm.c +++ b/riscv/kvm.c @@ -13,6 +13,11 @@ struct kvm_ext kvm_req_ext[] = { { 0, 0 }, }; +u64 kvm__arch_default_ram_address(void) +{ + return RISCV_RAM; +} + void kvm__arch_validate_cfg(struct kvm *kvm) { } diff --git a/x86/kvm.c b/x86/kvm.c index 24b0305a1841..328fa7500596 100644 --- a/x86/kvm.c +++ b/x86/kvm.c @@ -35,6 +35,11 @@ struct kvm_ext kvm_req_ext[] = { { 0, 0 } }; +u64 kvm__arch_default_ram_address(void) +{ + return 0; +} + void kvm__arch_validate_cfg(struct kvm *kvm) { } From patchwork Mon May 16 15:55:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 12851024 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AD863C433EF for ; Mon, 16 May 2022 15:59:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ZVykDBfJ/72x0Gv47eH/2dRn+wTgvEQamysvaY4KGMo=; b=Ou0BWSxNRTfBKG SkGmeDYmUk+zcGt7y9gJKMjzjMAAlWVwoNWJ6sDyI4OIfDzdcet8p4cTCGxNcSQ5G/QgsOk+33rC5 UTNm2U2FyQQGU5vv2Ae+3GGKEIXy/GmHTo8lYL9wEzQmu2YZ/RSXzpvWCunVPnscjRIRudxsSnWDh Pt/1nfS4+40IiD4maWz8+bApsI8v/M4aTtmn8b/ZP9tKtjFo2KFfkMf3T24x7RzHW8vm+5oBawR2B jXmHEC9s767Ra5ZL1ur0R28ySbkj73XXfSeDhGGY8OzSs/b8crWu+E4w9JcOE7b2B5Cqq6ha3M9If 2NdTq88V67pSQFyJrmzQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd6p-008mAu-GX; Mon, 16 May 2022 15:58:11 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nqd4R-008kqZ-Tk for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2022 15:55:45 +0000 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 617171063; Mon, 16 May 2022 08:55:43 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id F092E3F73D; Mon, 16 May 2022 08:55:41 -0700 (PDT) From: Alexandru Elisei To: will@kernel.org, julien.thierry.kdev@gmail.com, maz@kernel.org, suzuki.poulose@arm.com, julien@xen.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, james.morse@arm.com Subject: [PATCH v2 kvmtool 12/12] arm64: Allow the user to specify the RAM base address Date: Mon, 16 May 2022 16:55:26 +0100 Message-Id: <20220516155526.181694-13-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516155526.181694-1-alexandru.elisei@arm.com> References: <20220516155526.181694-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220516_085544_077365_004DC349 X-CRM114-Status: GOOD ( 14.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Allow the user to specify the RAM base address by using -m/--mem size@addr command line argument. The base address must be above 2GB, as to not overlap with the MMIO I/O region. Signed-off-by: Alexandru Elisei --- arm/aarch64/include/kvm/kvm-arch.h | 2 ++ arm/aarch64/kvm.c | 5 ++++- arm/kvm.c | 7 +++++-- builtin-run.c | 29 +++++++++++++++++++++++++---- include/kvm/kvm-config.h | 1 + include/kvm/kvm.h | 12 ++++++++++++ 6 files changed, 49 insertions(+), 7 deletions(-) diff --git a/arm/aarch64/include/kvm/kvm-arch.h b/arm/aarch64/include/kvm/kvm-arch.h index ff857ca6e7b4..02d09a413831 100644 --- a/arm/aarch64/include/kvm/kvm-arch.h +++ b/arm/aarch64/include/kvm/kvm-arch.h @@ -10,6 +10,8 @@ void kvm__arch_enable_mte(struct kvm *kvm); #define MAX_PAGE_SIZE SZ_64K +#define ARCH_HAS_CFG_RAM_ADDRESS 1 + #include "arm-common/kvm-arch.h" #endif /* KVM__KVM_ARCH_H */ diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c index af8e7eae0da2..14ffae9e39dc 100644 --- a/arm/aarch64/kvm.c +++ b/arm/aarch64/kvm.c @@ -44,6 +44,9 @@ void kvm__arch_validate_cfg(struct kvm *kvm) die("RAM size 0x%llx exceeds maximum allowed 0x%llx", kvm->cfg.ram_size, ARM_LOMAP_MAX_MEMORY); } + + if (kvm->cfg.ram_addr < ARM_MEMORY_AREA) + die("RAM address is below %luGB", ARM_MEMORY_AREA >> 30); } u64 kvm__arch_default_ram_address(void) @@ -117,7 +120,7 @@ int kvm__get_vm_type(struct kvm *kvm) return 0; /* Otherwise, compute the minimal required IPA size */ - max_ipa = ARM_MEMORY_AREA + kvm->cfg.ram_size - 1; + max_ipa = kvm->cfg.ram_addr + kvm->cfg.ram_size - 1; ipa_bits = max(32, fls_long(max_ipa)); pr_debug("max_ipa %lx ipa_bits %d max_ipa_bits %d", max_ipa, ipa_bits, max_ipa_bits); diff --git a/arm/kvm.c b/arm/kvm.c index abcccfabf59e..d51cc15d8b1c 100644 --- a/arm/kvm.c +++ b/arm/kvm.c @@ -55,7 +55,7 @@ void kvm__init_ram(struct kvm *kvm) madvise(kvm->arch.ram_alloc_start, kvm->arch.ram_alloc_size, MADV_HUGEPAGE); - phys_start = ARM_MEMORY_AREA; + phys_start = kvm->cfg.ram_addr; phys_size = kvm->ram_size; host_mem = kvm->ram_start; @@ -65,6 +65,9 @@ void kvm__init_ram(struct kvm *kvm) "address 0x%llx [err %d]", phys_size, phys_start, err); kvm->arch.memory_guest_start = phys_start; + + pr_debug("RAM created at 0x%llx - 0x%llx", + phys_start, phys_start + phys_size - 1); } void kvm__arch_delete_ram(struct kvm *kvm) @@ -201,7 +204,7 @@ bool kvm__load_firmware(struct kvm *kvm, const char *firmware_filename) /* For default firmware address, lets load it at the begining of RAM */ if (fw_addr == 0) - fw_addr = ARM_MEMORY_AREA; + fw_addr = kvm->arch.memory_guest_start; if (!validate_fw_addr(kvm, fw_addr)) die("Bad firmware destination: 0x%016llx", fw_addr); diff --git a/builtin-run.c b/builtin-run.c index 57c58be55159..26e6e9974009 100644 --- a/builtin-run.c +++ b/builtin-run.c @@ -131,12 +131,22 @@ static u64 parse_mem_option(const char *nptr, char **next) static int mem_parser(const struct option *opt, const char *arg, int unset) { struct kvm *kvm = opt->ptr; - char *next; + char *next, *nptr; kvm->cfg.ram_size = parse_mem_option(arg, &next); if (kvm->cfg.ram_size == 0) die("Invalid RAM size: %s", arg); + kvm->cfg.ram_addr = kvm__arch_default_ram_address(); + if (kvm__arch_has_cfg_ram_address() && *next == '@') { + next++; + if (*next == '\0') + die("Missing memory address: %s", arg); + + nptr = next; + kvm->cfg.ram_addr = parse_mem_option(nptr, &next); + } + if (*next != '\0') die("Invalid memory specifier: %s", arg); @@ -147,15 +157,26 @@ static int mem_parser(const struct option *opt, const char *arg, int unset) #define OPT_ARCH_RUN(...) #endif +#ifdef ARCH_HAS_CFG_RAM_ADDRESS +#define MEM_OPT_HELP_SHORT "size[BKMGTP][@addr[BKMGTP]]" +#define MEM_OPT_HELP_LONG \ + "Virtual machine memory size and optional base address, both" \ + " measured by default in megabytes (M)" +#else +#define MEM_OPT_HELP_SHORT "size[BKMGTP]" +#define MEM_OPT_HELP_LONG \ + "Virtual machine memory size, by default measured in" \ + " in megabytes (M)" +#endif + #define BUILD_OPTIONS(name, cfg, kvm) \ struct option name[] = { \ OPT_GROUP("Basic options:"), \ OPT_STRING('\0', "name", &(cfg)->guest_name, "guest name", \ "A name for the guest"), \ OPT_INTEGER('c', "cpus", &(cfg)->nrcpus, "Number of CPUs"), \ - OPT_CALLBACK('m', "mem", NULL, "size[BKMGTP]", \ - "Virtual machine memory size, by default measured" \ - " in megabytes (M)", mem_parser, kvm), \ + OPT_CALLBACK('m', "mem", NULL, MEM_OPT_HELP_SHORT, \ + MEM_OPT_HELP_LONG, mem_parser, kvm), \ OPT_CALLBACK('d', "disk", kvm, "image or rootfs_dir", "Disk " \ " image or rootfs directory", img_name_parser, \ kvm), \ diff --git a/include/kvm/kvm-config.h b/include/kvm/kvm-config.h index 31bc89520d52..45fe1caaebce 100644 --- a/include/kvm/kvm-config.h +++ b/include/kvm/kvm-config.h @@ -23,6 +23,7 @@ struct kvm_config { struct kvm_config_arch arch; struct disk_image_params disk_image[MAX_DISK_IMAGES]; struct vfio_device_params *vfio_devices; + u64 ram_addr; /* Guest memory physical base address, in bytes */ u64 ram_size; /* Guest memory size, in bytes */ u8 num_net_devices; u8 num_vfio_devices; diff --git a/include/kvm/kvm.h b/include/kvm/kvm.h index 360430b78b1e..eb23e2f77310 100644 --- a/include/kvm/kvm.h +++ b/include/kvm/kvm.h @@ -197,6 +197,18 @@ int kvm__arch_free_firmware(struct kvm *kvm); bool kvm__arch_cpu_supports_vm(void); void kvm__arch_read_term(struct kvm *kvm); +#ifdef ARCH_HAS_CFG_RAM_ADDRESS +static inline bool kvm__arch_has_cfg_ram_address(void) +{ + return true; +} +#else +static inline bool kvm__arch_has_cfg_ram_address(void) +{ + return false; +} +#endif + void *guest_flat_to_host(struct kvm *kvm, u64 offset); u64 host_to_guest_flat(struct kvm *kvm, void *ptr);