From: Thomas Gleixner <tglx@linutronix.de>
To: Borislav Petkov <bp@alien8.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
x86@kernel.org, Tom Lendacky <thomas.lendacky@amd.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Arjan van de Ven <arjan@linux.intel.com>,
Huang Rui <ray.huang@amd.com>, Juergen Gross <jgross@suse.com>,
Dimitri Sivanich <dimitri.sivanich@hpe.com>,
Michael Kelley <mikelley@microsoft.com>,
Wei Liu <wei.liu@kernel.org>
Subject: Re: [patch V3 02/40] x86/apic: Fake primary thread mask for XEN/PV
Date: Fri, 04 Aug 2023 22:02:59 +0200 [thread overview]
Message-ID: <87r0oimv7w.ffs@tglx> (raw)
In-Reply-To: <20230804181243.GLZM0/m0xXb/wMpUcD@fat_crate.local>
On Fri, Aug 04 2023 at 20:12, Borislav Petkov wrote:
>> @@ -2344,6 +2346,15 @@ static int __init smp_init_primary_threa
>> {
>> unsigned int cpu;
>>
>> + /*
>> + * XEN/PV provides either none or useless topology information.
>> + * Pretend that all vCPUs are primary threads.
>> + */
>> + if (xen_pv_domain()) {
>> + cpumask_copy(&__cpu_primary_thread_mask, cpu_possible_mask);
>> + return 0;
>> + }
>
> Can this be somewhere in the Xen init code instead?
Not for now. That's all going away with the 3rd installment. But right
now it's the right place to be.
next prev parent reply other threads:[~2023-08-04 20:03 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-02 10:20 [patch V3 00/40] x86/cpu: Rework the topology evaluation Thomas Gleixner
2023-08-02 10:20 ` [patch V3 01/40] cpu/SMT: Make SMT control more robust against enumeration failures Thomas Gleixner
2023-08-04 17:50 ` Borislav Petkov
2023-08-04 20:01 ` Thomas Gleixner
2023-08-02 10:21 ` [patch V3 02/40] x86/apic: Fake primary thread mask for XEN/PV Thomas Gleixner
2023-08-04 18:12 ` Borislav Petkov
2023-08-04 20:02 ` Thomas Gleixner [this message]
2023-08-02 10:21 ` [patch V3 03/40] x86/cpu: Encapsulate topology information in cpuinfo_x86 Thomas Gleixner
2023-08-02 10:21 ` [patch V3 04/40] x86/cpu: Move phys_proc_id into topology info Thomas Gleixner
2023-08-02 10:21 ` [patch V3 05/40] x86/cpu: Move cpu_die_id " Thomas Gleixner
2023-08-09 14:32 ` Zhang, Rui
2023-08-09 15:14 ` Thomas Gleixner
2023-08-02 10:21 ` [patch V3 06/40] scsi: lpfc: Use topology_core_id() Thomas Gleixner
2023-08-02 10:21 ` [patch V3 07/40] hwmon: (fam15h_power) " Thomas Gleixner
2023-08-02 10:21 ` [patch V3 08/40] x86/cpu: Move cpu_core_id into topology info Thomas Gleixner
2023-08-02 10:21 ` [patch V3 09/40] x86/cpu: Move cu_id " Thomas Gleixner
2023-08-02 10:21 ` [patch V3 10/40] x86/cpu: Remove pointless evaluation of x86_coreid_bits Thomas Gleixner
2023-08-02 10:21 ` [patch V3 11/40] x86/cpu: Move logical package and die IDs into topology info Thomas Gleixner
2023-08-02 10:21 ` [patch V3 12/40] x86/cpu: Move cpu_l[l2]c_id " Thomas Gleixner
2023-08-02 10:21 ` [patch V3 13/40] x86/apic: Use BAD_APICID consistently Thomas Gleixner
2023-08-02 10:21 ` [patch V3 14/40] x86/apic: Use u32 for APIC IDs in global data Thomas Gleixner
2023-08-02 10:21 ` [patch V3 15/40] x86/apic: Use u32 for check_apicid_used() Thomas Gleixner
2023-08-02 10:21 ` [patch V3 16/40] x86/apic: Use u32 for cpu_present_to_apicid() Thomas Gleixner
2023-08-02 10:21 ` [patch V3 17/40] x86/apic: Use u32 for phys_pkg_id() Thomas Gleixner
2023-08-02 10:21 ` [patch V3 18/40] x86/apic: Use u32 for [gs]et_apic_id() Thomas Gleixner
2023-08-02 10:21 ` [patch V3 19/40] x86/apic: Use u32 for wakeup_secondary_cpu[_64]() Thomas Gleixner
2023-08-10 7:58 ` Qiuxu Zhuo
2023-08-02 10:21 ` [patch V3 20/40] x86/cpu/topology: Cure the abuse of cpuinfo for persisting logical ids Thomas Gleixner
2023-08-02 10:21 ` [patch V3 21/40] x86/cpu: Provide debug interface Thomas Gleixner
2023-08-02 10:21 ` [patch V3 22/40] x86/cpu: Provide cpuid_read() et al Thomas Gleixner
2023-08-02 10:21 ` [patch V3 23/40] x86/cpu: Provide cpu_init/parse_topology() Thomas Gleixner
2023-08-04 8:14 ` K Prateek Nayak
2023-08-04 8:28 ` Thomas Gleixner
2023-08-04 8:34 ` K Prateek Nayak
2023-08-12 6:41 ` Zhang, Rui
2023-08-12 8:00 ` Zhang, Rui
2023-08-14 6:26 ` Thomas Gleixner
2023-08-14 7:11 ` Zhang, Rui
2023-08-13 13:30 ` Zhang, Rui
2023-08-13 14:36 ` Thomas Gleixner
2023-08-14 6:20 ` Thomas Gleixner
2023-08-14 6:42 ` Zhang, Rui
2023-08-02 10:21 ` [patch V3 24/40] x86/cpu: Add legacy topology parser Thomas Gleixner
2023-08-02 10:21 ` [patch V3 25/40] x86/cpu: Use common topology code for Centaur and Zhaoxin Thomas Gleixner
2023-08-02 10:21 ` [patch V3 26/40] x86/cpu: Move __max_die_per_package to common.c Thomas Gleixner
2023-08-02 10:21 ` [patch V3 27/40] x86/cpu: Provide a sane leaf 0xb/0x1f parser Thomas Gleixner
2023-08-12 8:21 ` Zhang, Rui
2023-08-12 20:04 ` Thomas Gleixner
2023-08-13 15:04 ` Thomas Gleixner
2023-08-14 8:25 ` Zhang, Rui
2023-08-14 12:26 ` Thomas Gleixner
2023-08-14 14:48 ` Brown, Len
2023-08-14 16:13 ` Thomas Gleixner
2023-08-15 19:30 ` Brown, Len
2023-08-17 9:09 ` Thomas Gleixner
2023-08-18 5:01 ` Brown, Len
2023-08-21 10:27 ` Thomas Gleixner
2023-08-30 2:46 ` Brown, Len
2023-08-30 12:39 ` Thomas Gleixner
2023-09-01 3:09 ` Brown, Len
2023-09-01 7:45 ` Thomas Gleixner
2023-08-14 15:28 ` Zhang, Rui
2023-08-14 17:12 ` Thomas Gleixner
2023-08-02 10:21 ` [patch V3 28/40] x86/cpu: Use common topology code for Intel Thomas Gleixner
2023-08-02 10:21 ` [patch V3 29/40] x86/cpu/amd: Provide a separate accessor for Node ID Thomas Gleixner
2023-08-02 10:21 ` [patch V3 30/40] x86/cpu: Provide an AMD/HYGON specific topology parser Thomas Gleixner
2023-08-02 19:28 ` Michael Kelley (LINUX)
2023-08-02 19:46 ` Thomas Gleixner
2023-08-02 19:51 ` [patch V3a " Thomas Gleixner
2023-08-11 12:58 ` Pu Wen
2023-08-11 17:11 ` Thomas Gleixner
2023-08-12 3:58 ` Pu Wen
2023-10-13 9:38 ` [tip: x86/core] x86/cpu/hygon: Fix the CPU topology evaluation for real tip-bot2 for Pu Wen
2023-08-02 10:21 ` [patch V3 31/40] x86/smpboot: Teach it about topo.amd_node_id Thomas Gleixner
2023-08-02 10:21 ` [patch V3 32/40] x86/cpu: Use common topology code for AMD Thomas Gleixner
2023-08-02 10:21 ` [patch V3 33/40] x86/cpu: Use common topology code for HYGON Thomas Gleixner
2023-08-11 13:00 ` Pu Wen
2023-08-11 17:11 ` Thomas Gleixner
2023-08-02 10:21 ` [patch V3 34/40] x86/mm/numa: Use core domain size on AMD Thomas Gleixner
2023-08-02 10:21 ` [patch V3 35/40] x86/cpu: Make topology_amd_node_id() use the actual node info Thomas Gleixner
2023-08-02 10:21 ` [patch V3 36/40] x86/cpu: Remove topology.c Thomas Gleixner
2023-08-02 10:21 ` [patch V3 37/40] x86/cpu: Remove x86_coreid_bits Thomas Gleixner
2023-08-02 10:21 ` [patch V3 38/40] x86/apic: Remove unused phys_pkg_id() callback Thomas Gleixner
2023-08-02 10:21 ` [patch V3 39/40] x86/xen/smp_pv: Remove cpudata fiddling Thomas Gleixner
2023-08-02 10:22 ` [patch V3 40/40] x86/apic/uv: Remove the private leaf 0xb parser Thomas Gleixner
2023-08-02 11:56 ` [patch V3 00/40] x86/cpu: Rework the topology evaluation Juergen Gross
2023-08-03 0:07 ` Sohil Mehta
2023-08-03 3:44 ` Michael Kelley (LINUX)
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