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 --- scripts/Makefile.debug | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 scripts/Makefile.debug (limited to 'scripts/Makefile.debug') diff --git a/scripts/Makefile.debug b/scripts/Makefile.debug new file mode 100644 index 000000000..107db997c --- /dev/null +++ b/scripts/Makefile.debug @@ -0,0 +1,52 @@ +DEBUG_CFLAGS := +DEBUG_RUSTFLAGS := + +debug-flags-y := -g + +ifdef CONFIG_DEBUG_INFO_SPLIT +DEBUG_CFLAGS += -gsplit-dwarf +endif + +debug-flags-$(CONFIG_DEBUG_INFO_DWARF4) += -gdwarf-4 +debug-flags-$(CONFIG_DEBUG_INFO_DWARF5) += -gdwarf-5 +ifeq ($(CONFIG_CC_IS_CLANG)$(CONFIG_AS_IS_GNU),yy) +# Clang does not pass -g or -gdwarf-* option down to GAS. +# Add -Wa, prefix to explicitly specify the flags. +KBUILD_AFLAGS += $(addprefix -Wa$(comma), $(debug-flags-y)) +endif +DEBUG_CFLAGS += $(debug-flags-y) +KBUILD_AFLAGS += $(debug-flags-y) + +ifdef CONFIG_DEBUG_INFO_DWARF4 +DEBUG_RUSTFLAGS += -Zdwarf-version=4 +else ifdef CONFIG_DEBUG_INFO_DWARF5 +DEBUG_RUSTFLAGS += -Zdwarf-version=5 +endif + +ifdef CONFIG_DEBUG_INFO_REDUCED +DEBUG_CFLAGS += -fno-var-tracking +DEBUG_RUSTFLAGS += -Cdebuginfo=1 +ifdef CONFIG_CC_IS_GCC +DEBUG_CFLAGS += -femit-struct-debug-baseonly +endif +else +DEBUG_RUSTFLAGS += -Cdebuginfo=2 +endif + +ifdef CONFIG_DEBUG_INFO_COMPRESSED_ZLIB +DEBUG_CFLAGS += -gz=zlib +DEBUG_RUSTFLAGS += -Zdebuginfo-compression=zlib +KBUILD_AFLAGS += -gz=zlib +KBUILD_LDFLAGS += --compress-debug-sections=zlib +else ifdef CONFIG_DEBUG_INFO_COMPRESSED_ZSTD +DEBUG_CFLAGS += -gz=zstd +DEBUG_RUSTFLAGS += -Zdebuginfo-compression=zstd +KBUILD_AFLAGS += -gz=zstd +KBUILD_LDFLAGS += --compress-debug-sections=zstd +endif + +KBUILD_CFLAGS += $(DEBUG_CFLAGS) +export DEBUG_CFLAGS + +KBUILD_RUSTFLAGS += $(DEBUG_RUSTFLAGS) +export DEBUG_RUSTFLAGS -- cgit v1.3.1