[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH v1 0/5] Introduce cpu die topology and enable CPUID.
From: |
Like Xu |
Subject: |
[Qemu-devel] [PATCH v1 0/5] Introduce cpu die topology and enable CPUID.1F for i386 |
Date: |
Mon, 14 Jan 2019 20:24:54 +0800 |
As we know, die is a rectangular piece of a semiconductor wafer. It's very
common
that chip manufacturers put a multi-core die in one package and one die always
has
a one-to-one relationship with one socket. Inside the die, it cotains
multi-cores
and core contains threads topologically. We apply this socket/core/thread model
to
the qemu -smp configurable space and save it into APIC_IDs for identification.
The undercurrent Is surging. Multi-chip packaging technology allows for
integration
of multi-die devices in a single package, for example Intel CLX-AP or AMD EPYC.
Integration can be enabled by high-performance, heterogeneous, multi-dies
interconnect
technology, providing a more cost-effective manner. QEMU and guests may take
advantages
of multi-dies host for such as guest placing or energy efficiency management...
This patch series extend the CPU topology to the socket/dies/core/thread model,
allowing the setting of dies number per one socket on -smp qemu command. For
i386, it upgrades APIC_IDs generation and reversion functions with a new exposed
leaf called CPUID.1F, which is a preferred superset to leaf 0BH. The CPUID.1F
spec is on https://software.intel.com/en-us/articles/intel-sdm, 3-190 Vol 2A.
E.g. we use -smp 4,dies=2,cores=2,threads=1 to run an MCP kvm-guest,
check raw cpuid data and the expected output from guest is following:
0x0000001f 0x00: eax=0x00000000 ebx=0x00000001 ecx=0x00000100 edx=0x00000002
0x0000001f 0x01: eax=0x00000001 ebx=0x00000002 ecx=0x00000201 edx=0x00000001
0x0000001f 0x02: eax=0x00000002 ebx=0x00000004 ecx=0x00000502 edx=0x00000003
0x0000001f 0x03: eax=0x00000000 ebx=0x00000000 ecx=0x00000003 edx=0x00000001
Like Xu (5):
cpu: introduce die, the new cpu toppolgy emulation level
vl.c: add -smp,dies=* command line support
i386: extend x86_apicid_* functions for smp_dies support
i386: enable CPUID.1F leaf generation based on spec
i386: add CPUID.1F to cpuid_data with host_cpuid check
cpus.c | 1 +
hmp.c | 3 ++
hw/core/machine.c | 12 +++++++
hw/i386/pc.c | 37 +++++++++++++++-------
include/hw/i386/topology.h | 79 ++++++++++++++++++++++++++++++++++------------
include/qom/cpu.h | 1 +
include/sysemu/cpus.h | 1 +
qapi/misc.json | 1 +
target/i386/cpu.c | 57 +++++++++++++++++++++++++++++----
target/i386/cpu.h | 5 +++
target/i386/kvm.c | 34 +++++++++++++++++++-
target/i386/kvm_i386.h | 1 +
vl.c | 33 +++++++++++--------
13 files changed, 213 insertions(+), 52 deletions(-)
--
1.8.3.1
- [Qemu-devel] [PATCH v1 0/5] Introduce cpu die topology and enable CPUID.1F for i386,
Like Xu <=
- [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Like Xu, 2019/01/13
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Eduardo Habkost, 2019/01/14
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Xu, Like, 2019/01/14
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Daniel P . Berrangé, 2019/01/16
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Like Xu, 2019/01/16
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Daniel P . Berrangé, 2019/01/17
[Qemu-devel] [PATCH v1 3/5] i386: extend x86_apicid_* functions for smp_dies support, Like Xu, 2019/01/13
[Qemu-devel] [PATCH v1 1/5] cpu: introduce die, the new cpu toppolgy emulation level, Like Xu, 2019/01/13