From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44389) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WW4Jb-0000Re-EI for qemu-devel@nongnu.org; Fri, 04 Apr 2014 09:37:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WW4JV-0005t8-7T for qemu-devel@nongnu.org; Fri, 04 Apr 2014 09:37:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:24125) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WW4JU-0005sz-VP for qemu-devel@nongnu.org; Fri, 04 Apr 2014 09:37:45 -0400 From: Igor Mammedov Date: Fri, 4 Apr 2014 15:36:30 +0200 Message-Id: <1396618620-27823-6-git-send-email-imammedo@redhat.com> In-Reply-To: <1396618620-27823-1-git-send-email-imammedo@redhat.com> References: <1396618620-27823-1-git-send-email-imammedo@redhat.com> Subject: [Qemu-devel] [PATCH 05/35] vl.c: extend -m option to support options for memory hotplug List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, mst@redhat.com, aik@ozlabs.ru, hutao@cn.fujitsu.com, mjt@tls.msk.ru, lcapitulino@redhat.com, kraxel@redhat.com, akong@redhat.com, quintela@redhat.com, armbru@redhat.com, aliguori@amazon.com, jan.kiszka@siemens.com, lersek@redhat.com, ehabkost@redhat.com, marcel.a@redhat.com, stefanha@redhat.com, chegu_vinod@hp.com, rth@twiddle.net, kwolf@redhat.com, s.priebe@profihost.ag, mreitz@redhat.com, vasilis.liaskovitis@profitbricks.com, pbonzini@redhat.com, afaerber@suse.de Add following parameters: "slots" - total number of hotplug memory slots "maxmem" - maximum possible memory "slots" and "maxmem" should go in pair and "maxmem" should be greater than "mem" for memory hotplug to be enabled. Signed-off-by: Igor Mammedov --- include/hw/boards.h | 2 ++ qemu-options.hx | 9 ++++++--- vl.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 59 insertions(+), 3 deletions(-) diff --git a/include/hw/boards.h b/include/hw/boards.h index dd2c70d..3567190 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -10,6 +10,8 @@ typedef struct QEMUMachineInitArgs { const QEMUMachine *machine; ram_addr_t ram_size; + ram_addr_t maxram_size; + uint64_t ram_slots; const char *boot_order; const char *kernel_filename; const char *kernel_cmdline; diff --git a/qemu-options.hx b/qemu-options.hx index a5a412e..7934147 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -210,17 +210,20 @@ use is discouraged as it may be removed from future versions. ETEXI DEF("m", HAS_ARG, QEMU_OPTION_m, - "-m [size=]megs\n" + "-m[emory] [size=]megs[,slots=n,maxmem=size]\n" " configure guest RAM\n" " size: initial amount of guest memory (default: " - stringify(DEFAULT_RAM_SIZE) "MiB)\n", + stringify(DEFAULT_RAM_SIZE) "MiB)\n" + " slots: number of hotplug slots (default: none)\n" + " maxmem: maximum amount of guest memory (default: none)\n", QEMU_ARCH_ALL) STEXI @item -m [size=]@var{megs} @findex -m Set virtual RAM size to @var{megs} megabytes. Default is 128 MiB. Optionally, a suffix of ``M'' or ``G'' can be used to signify a value in megabytes or -gigabytes respectively. +gigabytes respectively. Optional pair @var{slots}, @var{maxmem} could be used +to set amount of hotluggable memory slots and possible maximum amount of memory. ETEXI DEF("mem-path", HAS_ARG, QEMU_OPTION_mempath, diff --git a/vl.c b/vl.c index 2181b41..8f7b04e 100644 --- a/vl.c +++ b/vl.c @@ -520,6 +520,14 @@ static QemuOptsList qemu_mem_opts = { .name = "size", .type = QEMU_OPT_SIZE, }, + { + .name = "slots", + .type = QEMU_OPT_NUMBER, + }, + { + .name = "maxmem", + .type = QEMU_OPT_SIZE, + }, { /* end of list */ } }, }; @@ -2975,6 +2983,8 @@ int main(int argc, char **argv, char **envp) const char *trace_file = NULL; const ram_addr_t default_ram_size = (ram_addr_t)DEFAULT_RAM_SIZE * 1024 * 1024; + ram_addr_t maxram_size = default_ram_size; + uint64_t ram_slots = 0; atexit(qemu_run_exit_notifiers); error_set_progname(argv[0]); @@ -3312,6 +3322,7 @@ int main(int argc, char **argv, char **envp) case QEMU_OPTION_m: { uint64_t sz; const char *mem_str; + const char *maxmem_str, *slots_str; opts = qemu_opts_parse(qemu_find_opts("memory"), optarg, 1); @@ -3353,6 +3364,44 @@ int main(int argc, char **argv, char **envp) error_report("ram size too large"); exit(EXIT_FAILURE); } + + maxmem_str = qemu_opt_get(opts, "maxmem"); + slots_str = qemu_opt_get(opts, "slots"); + if (maxmem_str && slots_str) { + uint64_t slots; + + sz = qemu_opt_get_size(opts, "maxmem", 0); + if (sz < ram_size) { + fprintf(stderr, "qemu: invalid -m option value: maxmem " + "(%" PRIu64 ") <= initial memory (%" + PRIu64 ")\n", sz, ram_size); + exit(EXIT_FAILURE); + } + + slots = qemu_opt_get_number(opts, "slots", 0); + if ((sz > ram_size) && !slots) { + fprintf(stderr, "qemu: invalid -m option value: maxmem " + "(%" PRIu64 ") more than initial memory (%" + PRIu64 ") but no hotplug slots where " + "specified\n", sz, ram_size); + exit(EXIT_FAILURE); + } + + if ((sz <= ram_size) && slots) { + fprintf(stderr, "qemu: invalid -m option value: %" + PRIu64 " hotplug slots where specified but " + "maxmem (%" PRIu64 ") <= initial memory (%" + PRIu64 ")\n", slots, sz, ram_size); + exit(EXIT_FAILURE); + } + maxram_size = sz; + ram_slots = slots; + } else if ((!maxmem_str && slots_str) || + (maxmem_str && !slots_str)) { + fprintf(stderr, "qemu: invalid -m option value: missing " + "'%s' option\n", slots_str ? "maxmem" : "slots"); + exit(EXIT_FAILURE); + } break; } #ifdef CONFIG_TPM @@ -4411,6 +4460,8 @@ int main(int argc, char **argv, char **envp) QEMUMachineInitArgs args = { .machine = machine, .ram_size = ram_size, + .maxram_size = maxram_size, + .ram_slots = ram_slots, .boot_order = boot_order, .kernel_filename = kernel_filename, .kernel_cmdline = kernel_cmdline, -- 1.9.0