From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- arch/arm/boot/Makefile | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 arch/arm/boot/Makefile (limited to 'arch/arm/boot/Makefile') diff --git a/arch/arm/boot/Makefile b/arch/arm/boot/Makefile new file mode 100644 index 000000000..ba9b9a802 --- /dev/null +++ b/arch/arm/boot/Makefile @@ -0,0 +1,92 @@ +# +# arch/arm/boot/Makefile +# +# This file is included by the global makefile so that you can add your own +# architecture-specific flags and dependencies. +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 1995-2002 Russell King +# +OBJCOPYFLAGS :=-O binary -R .comment -S + +# ZRELADDR == virt_to_phys(PAGE_OFFSET + TEXT_OFFSET) +ifdef CONFIG_PHYS_OFFSET +add_hex = $(shell printf 0x%x $$(( $(1) + $(2) )) ) +ZRELADDR := $(call add_hex, $(CONFIG_PHYS_OFFSET), $(TEXT_OFFSET)) +endif + +PHYS_OFFSET := $(CONFIG_PHYS_OFFSET) +export ZRELADDR PARAMS_PHYS PHYS_OFFSET + +targets := Image zImage xipImage bootpImage uImage + +ifeq ($(CONFIG_XIP_KERNEL),y) + +cmd_deflate_xip_data = $(CONFIG_SHELL) -c '$(src)/deflate_xip_data.sh $< $@' + +ifeq ($(CONFIG_XIP_DEFLATED_DATA),y) +quiet_cmd_mkxip = XIPZ $@ +cmd_mkxip = $(cmd_objcopy) && $(cmd_deflate_xip_data) +else +quiet_cmd_mkxip = $(quiet_cmd_objcopy) +cmd_mkxip = $(cmd_objcopy) +endif + +$(obj)/xipImage: vmlinux FORCE + $(call if_changed,mkxip) + @$(kecho) ' Physical Address of xipImage: $(CONFIG_XIP_PHYS_ADDR)' + +$(obj)/Image $(obj)/zImage: FORCE + @echo 'Kernel configured for XIP (CONFIG_XIP_KERNEL=y)' + @echo 'Only the xipImage target is available in this case' + @false + +else + +$(obj)/xipImage: FORCE + @echo 'Kernel not configured for XIP (CONFIG_XIP_KERNEL!=y)' + @false + +$(obj)/Image: vmlinux FORCE + $(call if_changed,objcopy) + +$(obj)/compressed/vmlinux: $(obj)/Image FORCE + $(Q)$(MAKE) $(build)=$(obj)/compressed $@ + +$(obj)/zImage: $(obj)/compressed/vmlinux FORCE + $(call if_changed,objcopy) + +endif + +ifneq ($(LOADADDR),) + UIMAGE_LOADADDR=$(LOADADDR) +else + ifeq ($(CONFIG_ZBOOT_ROM),y) + UIMAGE_LOADADDR=$(CONFIG_ZBOOT_ROM_TEXT) + else + UIMAGE_LOADADDR=$(ZRELADDR) + endif +endif + +check_for_multiple_loadaddr = \ +if [ $(words $(UIMAGE_LOADADDR)) -ne 1 ]; then \ + echo 'multiple (or no) load addresses: $(UIMAGE_LOADADDR)'; \ + echo 'This is incompatible with uImages'; \ + echo 'Specify LOADADDR on the commandline to build an uImage'; \ + false; \ +fi + +$(obj)/uImage: $(obj)/zImage FORCE + @$(check_for_multiple_loadaddr) + $(call if_changed,uimage) + +$(obj)/bootp/bootp: $(obj)/zImage FORCE + $(Q)$(MAKE) $(build)=$(obj)/bootp $@ + +$(obj)/bootpImage: $(obj)/bootp/bootp FORCE + $(call if_changed,objcopy) + +subdir- := bootp compressed dts -- cgit v1.3.1