linux/arch/x86/xen
Jan Beulich e25a8d9599 x86/Xen: streamline (and fix) PV CPU enumeration
This started out with me noticing that "dom0_max_vcpus=<N>" with <N>
larger than the number of physical CPUs reported through ACPI tables
would not bring up the "excess" vCPU-s. Addressing this is the primary
purpose of the change; CPU maps handling is being tidied only as far as
is necessary for the change here (with the effect of also avoiding the
setting up of too much per-CPU infrastructure, i.e. for CPUs which can
never come online).

Noticing that xen_fill_possible_map() is called way too early, whereas
xen_filter_cpu_maps() is called too late (after per-CPU areas were
already set up), and further observing that each of the functions serves
only one of Dom0 or DomU, it looked like it was better to simplify this.
Use the .get_smp_config hook instead, uniformly for Dom0 and DomU.
xen_fill_possible_map() can be dropped altogether, while
xen_filter_cpu_maps() is re-purposed but not otherwise changed.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/2dbd5f0a-9859-ca2d-085e-a02f7166c610@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
2022-02-03 08:25:04 +01:00
..
apic.c x86/apic: Cleanup destination mode 2020-10-28 20:26:25 +01:00
debugfs.c x86: xen: no need to check return value of debugfs_create functions 2019-06-03 15:49:07 +02:00
debugfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
efi.c efi: x86/xen: switch to efi_get_secureboot_mode helper 2020-11-17 15:09:32 +01:00
enlighten_hvm.c xen/x2apic: enable x2apic mode when supported for HVM 2022-01-28 13:26:13 +01:00
enlighten_pv.c x86/Xen: streamline (and fix) PV CPU enumeration 2022-02-03 08:25:04 +01:00
enlighten_pvh.c xen/x86: adjust data placement 2021-10-05 08:36:19 +02:00
enlighten.c x86/xen: switch initial pvops IRQ functions to dummy ones 2021-11-02 08:03:43 -05:00
grant-table.c x86/xen: open code alloc_vm_area in arch_gnttab_valloc 2020-10-18 09:27:10 -07:00
irq.c x86/xen: switch initial pvops IRQ functions to dummy ones 2021-11-02 08:03:43 -05:00
Kconfig perf: Force architectures to opt-in to guest callbacks 2021-11-17 14:49:08 +01:00
Makefile xen/x86: allow PVH Dom0 without XEN_PV=y 2021-10-05 08:35:56 +02:00
mmu_hvm.c proc/vmcore: convert oldmem_pfn_is_ram callback to more generic vmcore callbacks 2021-11-09 10:02:48 -08:00
mmu_pv.c xen: branch for v5.16-rc1 2021-11-10 11:14:21 -08:00
mmu.c x86/xen: Add SPDX identifier in arch/x86/xen files 2018-09-03 16:50:33 +02:00
mmu.h mm: update ptep_modify_prot_start/commit to take vm_area_struct as arg 2019-03-05 21:07:18 -08:00
multicalls.c treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively 2019-04-09 14:19:06 +02:00
multicalls.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
p2m.c memblock: use memblock_free for freeing virtual pointers 2021-11-06 13:30:41 -07:00
pci-swiotlb-xen.c xen/pci-swiotlb: reduce visibility of symbols 2021-09-20 17:01:19 +02:00
platform-pci-unplug.c x86: xen: platform-pci-unplug: use pr_err() and pr_warn() instead of raw printk() 2021-08-30 12:09:54 +02:00
pmu.c perf/core: Rework guest callbacks to prepare for static_call support 2021-11-17 14:49:07 +01:00
pmu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
setup.c xen: branch for v5.16-rc1 2021-11-10 11:14:21 -08:00
smp_hvm.c x86/xen: fix 'nopvspin' build error 2021-01-18 07:22:20 +01:00
smp_pv.c x86/Xen: streamline (and fix) PV CPU enumeration 2022-02-03 08:25:04 +01:00
smp.c x86/xen: remove xen_have_vcpu_info_placement flag 2021-11-02 07:45:44 -05:00
smp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spinlock.c x86/xen: don't unbind uninitialized lock_kicker_irq 2020-11-09 07:43:45 -06:00
suspend_hvm.c xen: Move xen_setup_callback_vector() definition to include/xen/hvm.h 2020-06-11 15:15:19 +02:00
suspend_pv.c locking/seqlock, headers: Untangle the spaghetti monster 2020-08-06 16:13:13 +02:00
suspend.c x86/xen: Zero MSR_IA32_SPEC_CTRL before suspend 2018-02-28 16:03:19 +01:00
time.c x86/paravirt: Switch time pvops functions to use static_call() 2021-03-11 16:17:52 +01:00
trace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vga.c xen/x86: obtain upper 32 bits of video frame buffer address for Dom0 2022-01-06 08:55:34 +01:00
xen-asm.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
xen-head.S x86: Prepare asm files for straight-line-speculation 2021-12-08 12:25:37 +01:00
xen-ops.h x86/xen: remove xen_have_vcpu_info_placement flag 2021-11-02 07:45:44 -05:00