* Peter Xu (pet...@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 <pet...@redhat.com>
> ---
> 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 / dgilb...@redhat.com / Manchester, UK
