Roger Pau Monne 659019909b x86/xen: attempt to inflate the memory balloon on PVH ... [ Upstream commit 38620fc4e8 ] When running as PVH or HVM Linux will use holes in the memory map as scratch space to map grants, foreign domain pages and possibly miscellaneous other stuff. However the usage of such memory map holes for Xen purposes can be problematic. The request of holesby Xen happen quite early in the kernel boot process (grant table setup already uses scratch map space), and it's possible that by then not all devices have reclaimed their MMIO space. It's not unlikely for chunks of Xen scratch map space to end up using PCI bridge MMIO window memory, which (as expected) causes quite a lot of issues in the system. At least for PVH dom0 we have the possibility of using regions marked as UNUSABLE in the e820 memory map. Either if the region is UNUSABLE in the native memory map, or it has been converted into UNUSABLE in order to hide RAM regions from dom0, the second stage translation page-tables can populate those areas without issues. PV already has this kind of logic, where the balloon driver is inflated at boot. Re-use the current logic in order to also inflate it when running as PVH. onvert UNUSABLE regions up to the ratio specified in EXTRA_MEM_RATIO to RAM, while reserving them using xen_add_extra_mem() (which is also moved so it's no longer tied to CONFIG_PV). [jgross: fixed build for CONFIG_PVH without CONFIG_XEN_PVH] Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20240220174341.56131-1-roger.pau@citrix.com Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-04-13 13:10:10 +02:00
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atom	x86/platform: Convert to new CPU match macros	2020-03-24 21:29:38 +01:00
ce4100	x86/ce4100: Replace "ti,pcf8575" by "nxp,pcf8575"	2021-12-03 18:23:57 +01:00
efi	efi/x86: Move EFI runtime call setup/teardown helpers out of line	2023-09-11 06:37:50 +00:00
geode	x86/platform/geode: Convert alix LED to GPIO machine descriptor	2021-01-15 18:55:53 +01:00
intel	x86: Fix various typos in comments	2021-03-18 15:31:53 +01:00
intel-mid	platform-drivers-x86 for v5.12-1	2021-02-22 08:50:01 -08:00
intel-quark	arch/x86: Fix typos	2024-01-03 11:46:22 +01:00
iris	module: remove never implemented MODULE_SUPPORTED_DEVICE	2021-03-17 13:16:18 -07:00
olpc	x86/platform: Avoid missing-prototype warnings for OLPC	2023-05-18 11:56:19 -07:00
pvh	x86/xen: attempt to inflate the memory balloon on PVH	2024-04-13 13:10:10 +02:00
scx200	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
ts5500	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
uv	x86/cleanups changes for v6.8:	2024-01-08 17:23:32 -08:00
Makefile	Simple Firmware Interface (SFI) support removal for v5.12-rc1	2021-02-24 10:35:29 -08:00