Public Git Hosting - qemu.git/search

2014-06-19	Jason Wang	migration: introduce self_announce_delay() Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Jason Wang	migration: export SELF_ANNOUNCE_ROUNDS Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: q35: acpi: report error to user on unsupported... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Michael S. Tsirkin	ich: get rid of spaces in type name Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Markus Armbruster	virtio: Drop superfluous conditionals around g_strdup() Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Markus Armbruster	virtio: Drop superfluous conditionals around g_free() Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Michael S. Tsirkin	acpi-test: update expected tables Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Michael S. Tsirkin	acpi: update generated files Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: ACPI BIOS: make GPE.3 handle memory hotplug event... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: ACPI BIOS: reserve SRAT entry for hotplug mem hole Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: add "hotplug-memory-region-size" property to PC_MACHINE Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: ACPI BIOS: implement memory hotplug interface Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: propagate memory hotplug event to ACPI device Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: add acpi-device link to PCMachineState Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: migrate piix4 & ich9 MemHotplugState Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	acpi:ich9: add memory hotplug handling Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: ich9 lpc: make it work with global/compat properties Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	acpi:piix4: add memory hotplug handling Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	acpi:piix4: allow plug/unlug callbacks handle not only... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	trace: pc: add PC_DIMM slot & address allocation Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	trace: add acpi memory hotplug IO region events Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	acpi: memory hotplug ACPI hardware implementation Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	acpi: rename cpu_hotplug_defs.h to pc-hotplug.h Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc-dimm: add busy slot check and slot auto-allocation Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc-dimm: add busy address check and address auto-allocation Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: add memory hotplug handler to PC_MACHINE Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: exit QEMU if compat machine doesn't support memory... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: add 'etc/reserved-memory-end' fw_cfg interface... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: exit QEMU if number of slots more than supported 256 Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc: initialize memory hotplug address space Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	pc-dimm: do not allow setting an in-use memdev Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	memory: add memory_region_is_mapped() API Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Vasilis Liaskovitis	pc: implement pc-dimm device abstraction Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	qdev: expose DeviceState.hotplugged field as a property Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	qdev: hotplug for bus-less devices Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-19	Igor Mammedov	vl.c: extend -m option to support options for memory... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-18	Igor Mammedov	add memdev backend infrastructure Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-18	Igor Mammedov	vl.c: daemonize before guest memory allocation Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-18	Igor Mammedov	object_add: allow completion handler to get canonical... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-18	Igor Mammedov	pc: ACPI BIOS: use enum for defining memory affinity... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-18	Igor Mammedov	pc: create custom generic PC machine type Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-05	Don Slutz	qdev: Add test of qdev_prop_check_global Acked-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-06-05	Don Slutz	qdev: Display warning about unused -global Acked-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-27	Gabriel L. Somlo	tests: add smbios testing Suggested-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-27	Gabriel L. Somlo	tests: rename acpi-test to bios-tables-test Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-25	Ján Tomko	virtio-balloon: return empty data when no stats are... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-21	Andreas Färber	pcie_host: Turn pcie_host_init() into an instance_init Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-21	Gabriel L. Somlo	SMBIOS: Fix type 17 field sizes Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-21	Gabriel L. Somlo	SMBIOS: Update Type 0 struct generator for machines... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-21	Gabriel L. Somlo	SMBIOS: Fix endian-ness when populating multi-byte... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-21	BALATON Zoltan	serial-pci: Set prog interface field of pci config... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-12	Michael S. Tsirkin	virtio: allow mapping up to max queue size Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Michael S. Tsirkin	configure: make source tree build more robust Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Michael S. Tsirkin	MAINTAINERS: addresses for responsible disclosure Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Paolo Bonzini	pm_smbus: correctly report unclaimed cycles Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Paolo Bonzini	smbus: return -1 if nothing found at the given address Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Paolo Bonzini	smbus: allow returning an error from reads Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Gabriel L. Somlo	apic: use emulated lapic version 0x14 on pc machines... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Gabriel L. Somlo	pc: add compat_props placeholder for 2.0 machine type Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Hervé Poussineau	i8259: don't abort when trying to use level sensitive... Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Michael S. Tsirkin	acpi: fix tables for no-hpet configuration Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Kirill Batuzov	acpi-build: properly decrement objects' reference counters Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-05-07	Kirill Batuzov	acpi/pcihp.c: Rewrite acpi_pcihp_get_bsel using object_prope... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-04-14	Michael S. Tsirkin	acpi-test: update expected files Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-04-14	Igor Mammedov	acpi: fix incorrect encoding for 0x{F-1}FFFF Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-04-10	Michael S. Tsirkin	acpi: update generated hex files Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-04-09	Michael S. Tsirkin	tests/acpi: update expected DSDT files Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-04-08	Michael S. Tsirkin	dsdt: tweak ACPI ID for hotplug resource device Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-28	Marcel Apfelbaum	acpi: fix ACPI generation for pci bridges Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-27	Matt Lupfer	Don't enable a HPET timer if HPET is disabled Acked-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-27	Dr. David Alan Gilbert	Detect pthread_setname_np at configure time Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-26	Amos Kong	virtio-net: add vlan receive state to RxFilterInfo Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-26	Stefan Fritsch	virtio-net: Do not filter VLANs without F_CTRL_VLAN Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-26	Michael S. Tsirkin	Revert "acpi-test: rebuild SSDT" Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-26	Michael S. Tsirkin	acpi: make SSDT 1.0 spec compliant when possible Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-24	Marcel Apfelbaum	tests/acpi-test: do not fail if iasl is broken Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-19	Eduardo Habkost	vl.c: Use MAX_CPUMASK_BITS macro instead of hardcoded... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-19	Eduardo Habkost	sysemu.h: Document what MAX_CPUMASK_BITS really limits Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Michael S. Tsirkin	acpi: fix endian-ness for table ids Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Michael S. Tsirkin	acpi-test: signature endian-ness fixes Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Laszlo Ersek	i386/acpi-build: support hotplug of VCPU with APIC... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Michael S. Tsirkin	acpi-test: rebuild SSDT Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Laszlo Ersek	i386/acpi-build: allow more than 255 elements in CPON Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Eduardo Habkost	pc: Refuse max_cpus if it results in too large APIC ID Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Eduardo Habkost	acpi: Don't use MAX_CPUMASK_BITS for APIC ID bitmap Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Eduardo Habkost	acpi: Assert sts array limit on AcpiCpuHotplug_add() Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Eduardo Habkost	pc: Refuse CPU hotplug if the resulting APIC ID is... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Eduardo Habkost	acpi: Add ACPI_CPU_HOTPLUG_ID_LIMIT macro Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-18	Michael S. Tsirkin	acpi-test: update expected SSDT files Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-12	Michael S. Tsirkin	acpi-build: fix misaligned access Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-11	Michael S. Tsirkin	acpi-test: update expected SSDT files Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-11	Michael S. Tsirkin	acpi-build: don't access unaligned addresses Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-11	BALATON Zoltan	q35: Correct typo BRDIGE -> BRIDGE Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-11	Michael S. Tsirkin	configure: don't modify .status on error Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-11	Michael S. Tsirkin	pc: avoid duplicate names for ROM MRs Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-09	Michael S. Tsirkin	loader: rename in_ram/has_mr Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-09	Gabriel L. Somlo	qemu: x86: ignore ioapic polarity Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-09	Hervé Poussineau	pckbd: return 'keyboard enabled' on read input port... Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-09	Hervé Poussineau	pam: partly fix write-only mode Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
2014-03-09	Marcel Apfelbaum	acpi-test: issue errors instead of warnings when possible Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>	commit \| commitdiff \| tree
next

QEmu

RSS Atom