Hi Am 04.01.24 um 17:51 schrieb Ard Biesheuvel:
On Thu, 4 Jan 2024 at 10:54, Thomas Zimmermann <tzimmermann@xxxxxxx> wrote:Remove the include statement for <asm/bootparam.h> from several files that don't require it. Limits the exposure of the boot parameters within the Linux kernel code. Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx> --- v3: * revert of e820/types.h required v2: * clean up misc.h and e820/types.h * include bootparam.h in several source files --- arch/x86/boot/compressed/acpi.c | 2 ++ arch/x86/boot/compressed/cmdline.c | 2 ++ arch/x86/boot/compressed/efi.c | 2 ++ arch/x86/boot/compressed/misc.h | 3 ++- arch/x86/boot/compressed/pgtable_64.c | 1 + arch/x86/boot/compressed/sev.c | 1 + arch/x86/include/asm/kexec.h | 1 - arch/x86/include/asm/mem_encrypt.h | 2 +- arch/x86/include/asm/sev.h | 3 ++- arch/x86/include/asm/x86_init.h | 2 -- arch/x86/kernel/crash.c | 1 + arch/x86/kernel/sev-shared.c | 2 ++ arch/x86/platform/pvh/enlighten.c | 1 + arch/x86/xen/enlighten_pvh.c | 1 + arch/x86/xen/vga.c | 1 - 15 files changed, 18 insertions(+), 7 deletions(-) diff --git a/arch/x86/boot/compressed/acpi.c b/arch/x86/boot/compressed/acpi.c index 18d15d1ce87d..f196b1d1ddf8 100644 --- a/arch/x86/boot/compressed/acpi.c +++ b/arch/x86/boot/compressed/acpi.c @@ -5,6 +5,8 @@ #include "../string.h" #include "efi.h" +#include <asm/bootparam.h> + #include <linux/numa.h> /* diff --git a/arch/x86/boot/compressed/cmdline.c b/arch/x86/boot/compressed/cmdline.c index c1bb180973ea..e162d7f59cc5 100644 --- a/arch/x86/boot/compressed/cmdline.c +++ b/arch/x86/boot/compressed/cmdline.c @@ -1,6 +1,8 @@ // SPDX-License-Identifier: GPL-2.0 #include "misc.h" +#include <asm/bootparam.h> + static unsigned long fs; static inline void set_fs(unsigned long seg) { diff --git a/arch/x86/boot/compressed/efi.c b/arch/x86/boot/compressed/efi.c index 6edd034b0b30..f2e50f9758e6 100644 --- a/arch/x86/boot/compressed/efi.c +++ b/arch/x86/boot/compressed/efi.c @@ -7,6 +7,8 @@ #include "misc.h" +#include <asm/bootparam.h> + /** * efi_get_type - Given a pointer to boot_params, determine the type of EFI environment. * diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index c0d502bd8716..01c89c410efd 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -33,7 +33,6 @@ #include <linux/elf.h> #include <asm/page.h> #include <asm/boot.h> -#include <asm/bootparam.h> #include <asm/desc_defs.h> #include "tdx.h" @@ -53,6 +52,8 @@ #define memptr unsigned #endif +struct boot_param; +Typo?
Indeed
Interestingly, it still builds fine for me without any warnings./* boot/compressed/vmlinux start and end markers */ extern char _head[], _end[]; diff --git a/arch/x86/boot/compressed/pgtable_64.c b/arch/x86/boot/compressed/pgtable_64.c index 51f957b24ba7..c882e1f67af0 100644 --- a/arch/x86/boot/compressed/pgtable_64.c +++ b/arch/x86/boot/compressed/pgtable_64.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 #include "misc.h" +#include <asm/bootparam.h> #include <asm/e820/types.h> #include <asm/processor.h> #include "pgtable.h" diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c index 454acd7a2daf..13beae767e48 100644 --- a/arch/x86/boot/compressed/sev.c +++ b/arch/x86/boot/compressed/sev.c @@ -12,6 +12,7 @@ */ #include "misc.h" +#include <asm/bootparam.h> #include <asm/pgtable_types.h> #include <asm/sev.h> #include <asm/trapnr.h> diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h index c9f6a6c5de3c..91ca9a9ee3a2 100644 --- a/arch/x86/include/asm/kexec.h +++ b/arch/x86/include/asm/kexec.h @@ -25,7 +25,6 @@ #include <asm/page.h> #include <asm/ptrace.h> -#include <asm/bootparam.h> struct kimage; diff --git a/arch/x86/include/asm/mem_encrypt.h b/arch/x86/include/asm/mem_encrypt.h index 359ada486fa9..c1a8a3408c18 100644 --- a/arch/x86/include/asm/mem_encrypt.h +++ b/arch/x86/include/asm/mem_encrypt.h @@ -15,7 +15,7 @@ #include <linux/init.h> #include <linux/cc_platform.h> -#include <asm/bootparam.h> +struct boot_params;Unfortunately, the SEV/SNP code is a bit of a kludge given that it declares routines in headers under arch/x86/include/asm, and defines them in two different places (the decompressor and the kernel proper). So while I feel that we should avoid relying on incomplete struct definitions, this one (and the one below) seems fine to me for now. If/when someone gets around to cleaning up the SEV/SNP header files, to split the init code from the more widely used mm types etc, we can revisit this.
Thanks
#ifdef CONFIG_X86_MEM_ENCRYPT void __init mem_encrypt_init(void); diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h index 5b4a1ce3d368..8dad8b1613bf 100644 --- a/arch/x86/include/asm/sev.h +++ b/arch/x86/include/asm/sev.h @@ -13,7 +13,6 @@ #include <asm/insn.h> #include <asm/sev-common.h> -#include <asm/bootparam.h> #include <asm/coco.h> #define GHCB_PROTOCOL_MIN 1ULL @@ -22,6 +21,8 @@ #define VMGEXIT() { asm volatile("rep; vmmcall\n\r"); } +struct boot_params; + enum es_result { ES_OK, /* All good */ ES_UNSUPPORTED, /* Requested operation not supported */ diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h index c878616a18b8..f062715578a0 100644 --- a/arch/x86/include/asm/x86_init.h +++ b/arch/x86/include/asm/x86_init.h @@ -2,8 +2,6 @@ #ifndef _ASM_X86_PLATFORM_H #define _ASM_X86_PLATFORM_H -#include <asm/bootparam.h> - struct ghcb; struct mpc_bus; struct mpc_cpu; diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c index c92d88680dbf..564cff7ed33a 100644 --- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -26,6 +26,7 @@ #include <linux/vmalloc.h> #include <linux/memblock.h> +#include <asm/bootparam.h> #include <asm/processor.h> #include <asm/hardirq.h> #include <asm/nmi.h> diff --git a/arch/x86/kernel/sev-shared.c b/arch/x86/kernel/sev-shared.c index ccb0915e84e1..4962ec42dc68 100644 --- a/arch/x86/kernel/sev-shared.c +++ b/arch/x86/kernel/sev-shared.c @@ -9,6 +9,8 @@ * and is included directly into both code-bases. */ +#include <asm/setup_data.h> + #ifndef __BOOT_COMPRESSED #define error(v) pr_err(v) #define has_cpuflag(f) boot_cpu_has(f) diff --git a/arch/x86/platform/pvh/enlighten.c b/arch/x86/platform/pvh/enlighten.c index 00a92cb2c814..944e0290f2c0 100644 --- a/arch/x86/platform/pvh/enlighten.c +++ b/arch/x86/platform/pvh/enlighten.c @@ -3,6 +3,7 @@ #include <xen/hvc-console.h> +#include <asm/bootparam.h> #include <asm/io_apic.h> #include <asm/hypervisor.h> #include <asm/e820/api.h> diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c index ada3868c02c2..9e9db601bd52 100644 --- a/arch/x86/xen/enlighten_pvh.c +++ b/arch/x86/xen/enlighten_pvh.c @@ -4,6 +4,7 @@ #include <xen/hvc-console.h> +#include <asm/bootparam.h> #include <asm/io_apic.h> #include <asm/hypervisor.h> #include <asm/e820/api.h> diff --git a/arch/x86/xen/vga.c b/arch/x86/xen/vga.c index d97adab8420f..f7547807b0bd 100644 --- a/arch/x86/xen/vga.c +++ b/arch/x86/xen/vga.c @@ -2,7 +2,6 @@ #include <linux/screen_info.h> #include <linux/init.h> -#include <asm/bootparam.h> #include <asm/setup.h> #include <xen/interface/xen.h> -- 2.43.0
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg)
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