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4fc096a99e
linux/arch/mips
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Vitaly Kuznetsov 4fc096a99e KVM: Raise the maximum number of user memslots 
Current KVM_USER_MEM_SLOTS limits are arch specific (512 on Power, 509 on x86,
32 on s390, 16 on MIPS) but they don't really need to be. Memory slots are
allocated dynamically in KVM when added so the only real limitation is
'id_to_index' array which is 'short'. We don't have any other
KVM_MEM_SLOTS_NUM/KVM_USER_MEM_SLOTS-sized statically defined structures.

Low KVM_USER_MEM_SLOTS can be a limiting factor for some configurations.
In particular, when QEMU tries to start a Windows guest with Hyper-V SynIC
enabled and e.g. 256 vCPUs the limit is hit as SynIC requires two pages per
vCPU and the guest is free to pick any GFN for each of them, this fragments
memslots as QEMU wants to have a separate memslot for each of these pages
(which are supposed to act as 'overlay' pages).

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210127175731.2020089-3-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-09 08:17:08 -05:00
..
alchemy MIPS: Alchemy: Fix memleak in alchemy_clk_setup_cpu 2020-11-17 12:53:57 +01:00
ar7 mips: ar7: add missing iounmap() on error in ar7_gpio_init 2020-11-06 11:32:06 +01:00
ath25 MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
ath79 MIPS: ath79: Remove unused include <asm/mips_machine.h> 2020-07-28 10:20:44 +02:00
bcm47xx MIPS: BCM47XX: fix kconfig dependency bug for BCM47XX_BCMA 2020-11-12 23:21:55 +01:00
bcm63xx MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
bmips dma-direct: rename and cleanup __phys_to_dma 2020-09-11 09:14:43 +02:00
boot MIPS: DTS: img: Fix schema warnings for pwm-leds 2020-12-05 11:24:29 +01:00
cavium-octeon MIPS updates for v5.11: 2020-12-16 12:07:54 -08:00
cobalt MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
configs MIPS updates for v5.11: 2020-12-16 12:07:54 -08:00
crypto
dec MIPS: DEC: Restore bootmem reservation for firmware working memory area 2020-10-14 23:57:57 +02:00
fw MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
generic MIPS: mscc: Add serval support 2020-11-12 23:35:15 +01:00
include KVM: Raise the maximum number of user memslots 2021-02-09 08:17:08 -05:00
ingenic MIPS: jz4740: Rename jz4740 folders to ingenic 2020-09-18 16:35:05 +02:00
jazz dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h> 2020-10-06 07:07:06 +02:00
kernel epoll: fix compat syscall wire up of epoll_pwait2 2020-12-20 10:01:38 -08:00
kvm MIPS: kvm: Use vm_get_page_prot to get protection bits 2020-11-19 13:26:53 +01:00
lantiq MIPS: lantiq: add missing GPHY clock aliases for ar10 and grx390 2020-08-17 13:01:07 +02:00
lib mips: lib: uncached: fix non-standard usage of variable 'sp' 2020-12-14 16:03:11 +01:00
loongson2ef MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
loongson32 MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
loongson64 MIPS: Loongson64: Fix up reserving kernel memory range 2020-11-27 10:56:26 +01:00
math-emu MIPS: Use fallthrough for arch/mips 2020-05-07 11:55:47 +02:00
mm MIPS updates for v5.11: 2020-12-16 12:07:54 -08:00
mti-malta MIPS: malta: remove mach-malta/malta-dtshim.h header file 2020-09-21 22:16:47 +02:00
net
netlogic MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
oprofile mips/oprofile: Fix fallthrough placement 2020-08-22 09:23:15 +02:00
pci mips: Vr41xx: add missing iounmap() on error in vr41xx_pciu_init() 2020-11-06 11:35:46 +01:00
pic32 MIPS: Only include the platform file needed 2020-05-13 00:17:18 +02:00
pistachio MIPS: Fix exception handler memcpy() 2020-05-24 09:15:54 +02:00
power
ralink MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
rb532 MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
sgi-ip22 MIPS: Only include the platform file needed 2020-05-13 00:17:18 +02:00
sgi-ip27 mm/sparse: cleanup the code surrounding memory_present() 2020-08-07 11:33:27 -07:00
sgi-ip30 MIPS: SGI-IP30: Move irq bits to better header files 2020-09-21 22:15:49 +02:00
sgi-ip32 MIPS updates for v5.10: 2020-10-16 12:40:55 -07:00
sibyte MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
sni MIPS: SNI: Fix spurious interrupts 2020-09-16 22:40:58 +02:00
tools MIPS: tools: Fix resource leak in elf-entry.c 2020-05-24 09:29:48 +02:00
txx9 MIPS: replace add_memory_region with memblock 2020-10-12 12:01:36 +02:00
vdso mm: forbid splitting special mappings 2020-12-15 12:13:41 -08:00
vr41xx MIPS: Fix builds for VR41xx platforms 2020-05-15 09:09:58 +02:00
Kbuild MIPS: Fix "make clean" error due to recent changes 2020-05-13 13:20:22 +02:00
Kbuild.platforms MIPS: generic: Add support for Ingenic SoCs 2020-09-18 16:33:59 +02:00
Kconfig MIPS updates for v5.11: 2020-12-16 12:07:54 -08:00
Kconfig.debug mips: Add CPS_NS16550_WIDTH config 2020-05-22 09:12:52 +02:00
Makefile mips: boot: add support for self-extracting FIT images (vmlinuz.itb) 2020-11-12 23:47:22 +01:00
Makefile.postlink