From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45047) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3hW9-0003TD-T5 for qemu-devel@nongnu.org; Thu, 27 Apr 2017 07:23:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3hW6-0005BK-Ny for qemu-devel@nongnu.org; Thu, 27 Apr 2017 07:23:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50234) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3hW6-0005Az-EO for qemu-devel@nongnu.org; Thu, 27 Apr 2017 07:23:22 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8D33F64467 for ; Thu, 27 Apr 2017 11:23:20 +0000 (UTC) Date: Thu, 27 Apr 2017 12:23:14 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20170427112313.GD2082@work-vm> References: <1493287126-19072-1-git-send-email-peterx@redhat.com> <1493287126-19072-3-git-send-email-peterx@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1493287126-19072-3-git-send-email-peterx@redhat.com> Subject: Re: [Qemu-devel] [PATCH v3 2/2] ramblock: add new hmp command "info ramblock" List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Xu Cc: qemu-devel@nongnu.org, Paolo Bonzini , Markus Armbruster * Peter Xu (peterx@redhat.com) wrote: > To dump information about ramblocks. It looks like: > > (qemu) info ramblock > Block Name PSize Offset Used Total > /objects/mem 2M 0x0000000000000000 0x0000000080000000 0x0000000080000000 > vga.vram 4K 0x0000000080060000 0x0000000001000000 0x0000000001000000 > /rom@etc/acpi/tables 4K 0x00000000810b0000 0x0000000000020000 0x0000000000200000 > pc.bios 4K 0x0000000080000000 0x0000000000040000 0x0000000000040000 > 0000:00:03.0/e1000.rom 4K 0x0000000081070000 0x0000000000040000 0x0000000000040000 > pc.rom 4K 0x0000000080040000 0x0000000000020000 0x0000000000020000 > 0000:00:02.0/vga.rom 4K 0x0000000081060000 0x0000000000010000 0x0000000000010000 > /rom@etc/table-loader 4K 0x00000000812b0000 0x0000000000001000 0x0000000000001000 > /rom@etc/acpi/rsdp 4K 0x00000000812b1000 0x0000000000001000 0x0000000000001000 > > Ramblock is something hidden internally in QEMU implementation, and this > command should only be used by mostly QEMU developers on RAM stuff. It > is not a command suitable for QMP interface. So only HMP interface is > provided for it. > > Signed-off-by: Peter Xu > --- > exec.c | 36 ++++++++++++++++++++++++++++++++++++ > hmp-commands-info.hx | 14 ++++++++++++++ > hmp.c | 6 ++++++ > hmp.h | 1 + > include/exec/ramlist.h | 1 + > 5 files changed, 58 insertions(+) > > diff --git a/exec.c b/exec.c > index 50519ae..9b9d16e 100644 > --- a/exec.c > +++ b/exec.c > @@ -71,6 +71,8 @@ > #include "qemu/mmap-alloc.h" > #endif > > +#include "monitor/monitor.h" > + > //#define DEBUG_SUBPAGE > > #if !defined(CONFIG_USER_ONLY) > @@ -1333,6 +1335,40 @@ void qemu_mutex_unlock_ramlist(void) > qemu_mutex_unlock(&ram_list.mutex); > } > > +static const char *page_size_to_str(size_t psize) > +{ > + switch (psize) { > + case 0x1000: > + return "4K"; > + case 0x10000: > + return "64K"; > + case 0x200000: > + return "2M"; > + case 0x40000000: > + return "1G"; That's not very portable; other platforms have other sizes, for example I think ARM has 16kB as one option, and I'm pretty sure the huge-pages on Power are a different size. Hmm, we already have qemu-io-cmds.c:cvtstr and qapi/string-output-visitor.c:print_type_size to print sizes nicely; it's a pity we can't use them somehow rather than having a 3rd similar function. > + default: > + return "N/A"; > + } > +} > + > +void ram_block_dump(Monitor *mon) > +{ > + RAMBlock *block; > + > + rcu_read_lock(); > + monitor_printf(mon, "%24s %8s %18s %18s %18s\n", > + "Block Name", "PSize", "Offset", "Used", "Total"); > + RAMBLOCK_FOREACH(block) { > + monitor_printf(mon, "%24s %8s 0x%016" PRIx64 " 0x%016" PRIx64 > + " 0x%016" PRIx64 "\n", block->idstr, > + page_size_to_str(block->page_size), > + (uint64_t)block->offset, > + (uint64_t)block->used_length, > + (uint64_t)block->max_length); > + } Yes that should work, I remember there's a RAM_ADDR_FMT macro that's supposed to be usable for ram_addr_t, but that's fine. Dave > + rcu_read_unlock(); > +} > + > #ifdef __linux__ > /* > * FIXME TOCTTOU: this iterates over memory backends' mem-path, which > diff --git a/hmp-commands-info.hx b/hmp-commands-info.hx > index a53f105..ae16901 100644 > --- a/hmp-commands-info.hx > +++ b/hmp-commands-info.hx > @@ -788,6 +788,20 @@ Display the latest dump status. > ETEXI > > { > + .name = "ramblock", > + .args_type = "", > + .params = "", > + .help = "Display system ramblock information", > + .cmd = hmp_info_ramblock, > + }, > + > +STEXI > +@item info ramblock > +@findex ramblock > +Dump all the ramblocks of the system. > +ETEXI > + > + { > .name = "hotpluggable-cpus", > .args_type = "", > .params = "", > diff --git a/hmp.c b/hmp.c > index ab407d6..8369388 100644 > --- a/hmp.c > +++ b/hmp.c > @@ -37,6 +37,7 @@ > #include "qemu-io.h" > #include "qemu/cutils.h" > #include "qemu/error-report.h" > +#include "exec/ramlist.h" > #include "hw/intc/intc.h" > > #ifdef CONFIG_SPICE > @@ -2563,6 +2564,11 @@ void hmp_info_dump(Monitor *mon, const QDict *qdict) > qapi_free_DumpQueryResult(result); > } > > +void hmp_info_ramblock(Monitor *mon, const QDict *qdict) > +{ > + ram_block_dump(mon); > +} > + > void hmp_hotpluggable_cpus(Monitor *mon, const QDict *qdict) > { > Error *err = NULL; > diff --git a/hmp.h b/hmp.h > index 799fd37..7353b67 100644 > --- a/hmp.h > +++ b/hmp.h > @@ -136,6 +136,7 @@ void hmp_rocker_ports(Monitor *mon, const QDict *qdict); > void hmp_rocker_of_dpa_flows(Monitor *mon, const QDict *qdict); > void hmp_rocker_of_dpa_groups(Monitor *mon, const QDict *qdict); > void hmp_info_dump(Monitor *mon, const QDict *qdict); > +void hmp_info_ramblock(Monitor *mon, const QDict *qdict); > void hmp_hotpluggable_cpus(Monitor *mon, const QDict *qdict); > void hmp_info_vm_generation_id(Monitor *mon, const QDict *qdict); > > diff --git a/include/exec/ramlist.h b/include/exec/ramlist.h > index f1c6b45..2e2ac6c 100644 > --- a/include/exec/ramlist.h > +++ b/include/exec/ramlist.h > @@ -73,5 +73,6 @@ void ram_block_notifier_remove(RAMBlockNotifier *n); > void ram_block_notify_add(void *host, size_t size); > void ram_block_notify_remove(void *host, size_t size); > > +void ram_block_dump(Monitor *mon); > > #endif /* RAMLIST_H */ > -- > 2.7.4 > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK