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Wed, 6 Dec 2023 07:10:47 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap2.dmz-prg2.suse.org with ESMTPSA id g5o3E3cecGW0DQAAn2gu4w (envelope-from ); Wed, 06 Dec 2023 07:10:47 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 9489467a-9406-11ee-98e5-6d05b1d4d9a1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1701846647; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hDGYrruK/gE8BhhPs/pNrBuUXXpG5jh9JFmDAumCt+g=; b=m51hq4xHjOStUdOlrveBOiBDqyvxQimVF7+n3Nu8OH1jt5A4LZeX2i/gDIhweTMkb2ZYL4 svgUW1qdVKsMDA5VQ+gSPFfRSeMpVmf0o8QQXWUs/k+h6Ox1tT97hbyaZX6zdn3AY3ZSME qunVfSCC1IMDnWAYFq7FxQ5W7pOqsp0= From: Juergen Gross To: xen-devel@lists.xenproject.org Cc: Juergen Gross , Stefano Stabellini , Julien Grall , Bertrand Marquis , Michal Orzel , Volodymyr Babchuk Subject: [PATCH v2 1/3] xen/arm: set -mno-unaligned-access compiler option for Arm32 Date: Wed, 6 Dec 2023 08:10:37 +0100 Message-Id: <20231206071039.24435-2-jgross@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20231206071039.24435-1-jgross@suse.com> References: <20231206071039.24435-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Authentication-Results: smtp-out2.suse.de; none X-Spam-Level: **** X-Spam-Score: 4.71 X-Spamd-Result: default: False [4.71 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; BROKEN_CONTENT_TYPE(1.50)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; NEURAL_HAM_SHORT(-0.19)[-0.931]; RCPT_COUNT_SEVEN(0.00)[7]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1701846668516100001 Content-Type: text/plain; charset="utf-8" As the hypervisor is disabling unaligned accesses for Arm32, set the -mno-unaligned-access compiler option for building. This will prohibit unaligned accesses when e.g. accessing 2- or 4-byte data items in packed data structures. Signed-off-by: Juergen Gross Acked-by: Julien Grall --- V2: - new patch --- xen/arch/arm/arch.mk | 1 + 1 file changed, 1 insertion(+) diff --git a/xen/arch/arm/arch.mk b/xen/arch/arm/arch.mk index 58db76c4e1..022dcda192 100644 --- a/xen/arch/arm/arch.mk +++ b/xen/arch/arm/arch.mk @@ -7,6 +7,7 @@ $(call cc-option-add,CFLAGS,CC,-Wnested-externs) # Prevent floating-point variables from creeping into Xen. CFLAGS-$(CONFIG_ARM_32) +=3D -msoft-float CFLAGS-$(CONFIG_ARM_32) +=3D -mcpu=3Dcortex-a15 +CFLAGS-$(CONFIG_ARM_32) +=3D -mno-unaligned-access =20 CFLAGS-$(CONFIG_ARM_64) +=3D -mcpu=3Dgeneric CFLAGS-$(CONFIG_ARM_64) +=3D -mgeneral-regs-only # No fp registers etc --=20 2.35.3 From nobody Sun May 19 03:12:47 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=quarantine dis=none) header.from=suse.com ARC-Seal: i=1; a=rsa-sha256; t=1701846687; cv=none; d=zohomail.com; s=zohoarc; b=Kp7BMCzlQfcldARdN3yb4ravFfAjVSewpJy1zO1zrrLvvl2bhR8CMR9QmDEjCW5llQmvLci7CFZNzyB/s1fxIcUzKMOmXNvAHFx9cgcwDFAZnC4DtZ2fIlzdDJ/hnA2yLB8Das8DD5Tc8Ja72XVBqEDu4hwzXWQ6G8NRvy/TqAU= ARC-Message-Signature: i=1; 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Wed, 6 Dec 2023 07:10:53 +0000 (UTC) Received: from imap2.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap2.dmz-prg2.suse.org (Postfix) with ESMTPS id E09BC13403; Wed, 6 Dec 2023 07:10:52 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap2.dmz-prg2.suse.org with ESMTPSA id InuNNXwecGW8DQAAn2gu4w (envelope-from ); Wed, 06 Dec 2023 07:10:52 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 97e5022c-9406-11ee-9b0f-b553b5be7939 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1701846653; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=01yXAXnopllhAibwtpJp62r2FPmbb38ceKEA8gzDvaI=; b=vNpsbNvUbt8YY4Pr4TPNJ/2yIlflCNjgdkAMtbF67MfQ3TvPMF+bS0K8sNdb+SCxryoBc3 SM5hur8pgBJmymheTmLYRM6GVMpDCGdCsRDVp6mY6sel5WGlH77yeze89eSjAnLBvOp5A+ NWQJ0Ahn6Wbq+pmRNOXCkv8rTZ5zbw0= From: Juergen Gross To: xen-devel@lists.xenproject.org Cc: Juergen Gross , Andrew Cooper , George Dunlap , Jan Beulich , Julien Grall , Stefano Stabellini , Wei Liu , Arnd Bergmann Subject: [PATCH v2 2/3] xen: make include/xen/unaligned.h usable on all architectures Date: Wed, 6 Dec 2023 08:10:38 +0100 Message-Id: <20231206071039.24435-3-jgross@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20231206071039.24435-1-jgross@suse.com> References: <20231206071039.24435-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spam-Flag: NO X-Spamd-Result: default: False [1.70 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; BROKEN_CONTENT_TYPE(1.50)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; NEURAL_HAM_SHORT(-0.20)[-1.000]; RCPT_COUNT_SEVEN(0.00)[9]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-3.00)[100.00%] X-Spam-Level: * Authentication-Results: smtp-out1.suse.de; none X-Spam-Score: 1.70 X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1701846688934100001 Content-Type: text/plain; charset="utf-8" Instead of defining get_unaligned() and put_unaligned() in a way that is only supporting architectures allowing unaligned accesses, use the same approach as the Linux kernel and let the compiler do the decision how to generate the code for probably unaligned data accesses. Update include/xen/unaligned.h from include/asm-generic/unaligned.h of the Linux kernel. The generated code has been checked to be the same on x86. Modify the Linux variant to not use underscore prefixed identifiers, avoid unneeded parentheses and drop the 24-bit accessors. Signed-off-by: Arnd Bergmann Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 80= 3f4e1eab7a Signed-off-by: Juergen Gross Acked-by: Jan Beulich --- V2: - drop 24-bit accessors (Jan Beulich) - avoid underscore prefixed identifiers (Jan Beulich) - drop unneeded parentheses (Jan Beulich) --- xen/include/xen/unaligned.h | 77 ++++++++++++++++++++----------------- 1 file changed, 42 insertions(+), 35 deletions(-) diff --git a/xen/include/xen/unaligned.h b/xen/include/xen/unaligned.h index 0a2b16d05d..0ceb06a2bb 100644 --- a/xen/include/xen/unaligned.h +++ b/xen/include/xen/unaligned.h @@ -1,12 +1,4 @@ -/* - * This header can be used by architectures where unaligned accesses work - * without faulting, and at least reasonably efficiently. Other architect= ures - * will need to have a custom asm/unaligned.h. - */ -#ifndef __ASM_UNALIGNED_H__ -#error "xen/unaligned.h should not be included directly - include asm/unal= igned.h instead" -#endif - +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __XEN_UNALIGNED_H__ #define __XEN_UNALIGNED_H__ =20 @@ -15,67 +7,82 @@ #include #endif =20 -#define get_unaligned(p) (*(p)) -#define put_unaligned(val, p) (*(p) =3D (val)) +/* + * This is the most generic implementation of unaligned accesses + * and should work almost anywhere. + */ + +#define get_unaligned_t_(type, ptr) ({ \ + const struct { type x; } __packed *ptr_ =3D (typeof(ptr_))(ptr); \ + ptr_->x; \ +}) + +#define put_unaligned_t_(type, val, ptr) do { \ + struct { type x; } __packed *ptr_ =3D (typeof(ptr_))(ptr); \ + ptr_->x =3D val; \ +} while (0) + +#define get_unaligned(ptr) get_unaligned_t_(typeof(*(ptr)), ptr) +#define put_unaligned(val, ptr) put_unaligned_t_(typeof(*(ptr)), val, ptr) =20 -static inline uint16_t get_unaligned_be16(const void *p) +static inline u16 get_unaligned_le16(const void *p) { - return be16_to_cpup(p); + return le16_to_cpu(get_unaligned_t_(__le16, p)); } =20 -static inline void put_unaligned_be16(uint16_t val, void *p) +static inline u32 get_unaligned_le32(const void *p) { - *(__force __be16*)p =3D cpu_to_be16(val); + return le32_to_cpu(get_unaligned_t_(__le32, p)); } =20 -static inline uint32_t get_unaligned_be32(const void *p) +static inline u64 get_unaligned_le64(const void *p) { - return be32_to_cpup(p); + return le64_to_cpu(get_unaligned_t_(__le64, p)); } =20 -static inline void put_unaligned_be32(uint32_t val, void *p) +static inline void put_unaligned_le16(u16 val, void *p) { - *(__force __be32*)p =3D cpu_to_be32(val); + put_unaligned_t_(__le16, cpu_to_le16(val), p); } =20 -static inline uint64_t get_unaligned_be64(const void *p) +static inline void put_unaligned_le32(u32 val, void *p) { - return be64_to_cpup(p); + put_unaligned_t_(__le32, cpu_to_le32(val), p); } =20 -static inline void put_unaligned_be64(uint64_t val, void *p) +static inline void put_unaligned_le64(u64 val, void *p) { - *(__force __be64*)p =3D cpu_to_be64(val); + put_unaligned_t_(__le64, cpu_to_le64(val), p); } =20 -static inline uint16_t get_unaligned_le16(const void *p) +static inline u16 get_unaligned_be16(const void *p) { - return le16_to_cpup(p); + return be16_to_cpu(get_unaligned_t_(__be16, p)); } =20 -static inline void put_unaligned_le16(uint16_t val, void *p) +static inline u32 get_unaligned_be32(const void *p) { - *(__force __le16*)p =3D cpu_to_le16(val); + return be32_to_cpu(get_unaligned_t_(__be32, p)); } =20 -static inline uint32_t get_unaligned_le32(const void *p) +static inline u64 get_unaligned_be64(const void *p) { - return le32_to_cpup(p); + return be64_to_cpu(get_unaligned_t_(__be64, p)); } =20 -static inline void put_unaligned_le32(uint32_t val, void *p) +static inline void put_unaligned_be16(u16 val, void *p) { - *(__force __le32*)p =3D cpu_to_le32(val); + put_unaligned_t_(__be16, cpu_to_be16(val), p); } =20 -static inline uint64_t get_unaligned_le64(const void *p) +static inline void put_unaligned_be32(u32 val, void *p) { - return le64_to_cpup(p); + put_unaligned_t_(__be32, cpu_to_be32(val), p); } =20 -static inline void put_unaligned_le64(uint64_t val, void *p) +static inline void put_unaligned_be64(u64 val, void *p) { - *(__force __le64*)p =3D cpu_to_le64(val); + put_unaligned_t_(__be64, cpu_to_be64(val), p); } =20 #endif /* __XEN_UNALIGNED_H__ */ --=20 2.35.3 From nobody Sun May 19 03:12:47 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=quarantine dis=none) header.from=suse.com ARC-Seal: i=1; a=rsa-sha256; t=1701846677; cv=none; d=zohomail.com; s=zohoarc; b=ir08/EipNEGYGBBIqCVQo24ILZQLDbRF1avM3SVDLWLZMG9O4dotJMdBVnF+0vONpZ2m0ZoMcDjiJcSxmDKWU7kjuIa2xQYUk9279vWzdu/DmZliakvLLhodzHe62w3bn5JaNzEdYoIwa3B6fEHQU5JNBYF/lNKNKD8eSKiLrJc= ARC-Message-Signature: i=1; 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t=1701846658; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nBJS0i1q7hgxVXtg1Vp5RKK5sLWDTbrts9y24YukrYE=; b=HR63ul8yT+EJqnAwoqbVk3X445lU7ddHYJOHoc4xi2mYQ4Jd+qq1qCAPethfwYZqQAoIv4 ajGVGSbdXZ+CzlZZAlbQr82EbhsXgY+CDdHOt06klZ3XtiNNkM0ta1DhSD/KvKqwPAiGPZ WQnA8Q+fkAjohkNWdn1455hcQiRUs5w= From: Juergen Gross To: xen-devel@lists.xenproject.org Cc: Juergen Gross , Jan Beulich , Andrew Cooper , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Wei Liu , George Dunlap , Julien Grall , Stefano Stabellini Subject: [PATCH v2 3/3] xen: remove asm/unaligned.h Date: Wed, 6 Dec 2023 08:10:39 +0100 Message-Id: <20231206071039.24435-4-jgross@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20231206071039.24435-1-jgross@suse.com> References: <20231206071039.24435-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spam-Flag: NO X-Spamd-Result: default: False [9.80 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; BAYES_SPAM(5.10)[100.00%]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; BROKEN_CONTENT_TYPE(1.50)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; NEURAL_HAM_SHORT(-0.20)[-1.000]; RCPT_COUNT_SEVEN(0.00)[9]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[] X-Spam-Level: ********* Authentication-Results: smtp-out1.suse.de; none X-Spam-Score: 9.80 X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1701846678899100001 Content-Type: text/plain; charset="utf-8" With include/xen/unaligned.h now dealing properly with unaligned accesses for all architectures, asm/unaligned.h can be removed and users can be switched to include xen/unaligned.h instead. Signed-off-by: Juergen Gross Reviewed-by: Jan Beulich --- xen/arch/x86/include/asm/unaligned.h | 6 ------ xen/common/lz4/defs.h | 2 +- xen/common/lzo.c | 2 +- xen/common/unlzo.c | 2 +- xen/common/xz/private.h | 2 +- xen/common/zstd/mem.h | 2 +- xen/lib/xxhash32.c | 2 +- xen/lib/xxhash64.c | 2 +- 8 files changed, 7 insertions(+), 13 deletions(-) delete mode 100644 xen/arch/x86/include/asm/unaligned.h diff --git a/xen/arch/x86/include/asm/unaligned.h b/xen/arch/x86/include/as= m/unaligned.h deleted file mode 100644 index 6070801d4a..0000000000 --- a/xen/arch/x86/include/asm/unaligned.h +++ /dev/null @@ -1,6 +0,0 @@ -#ifndef __ASM_UNALIGNED_H__ -#define __ASM_UNALIGNED_H__ - -#include - -#endif /* __ASM_UNALIGNED_H__ */ diff --git a/xen/common/lz4/defs.h b/xen/common/lz4/defs.h index 10609f5a53..6d81113266 100644 --- a/xen/common/lz4/defs.h +++ b/xen/common/lz4/defs.h @@ -10,7 +10,7 @@ =20 #ifdef __XEN__ #include -#include +#include #else =20 static inline u16 get_unaligned_le16(const void *p) diff --git a/xen/common/lzo.c b/xen/common/lzo.c index a87c76dded..cc03f0f554 100644 --- a/xen/common/lzo.c +++ b/xen/common/lzo.c @@ -97,7 +97,7 @@ #ifdef __XEN__ #include #include -#include +#include #else #define get_unaligned_le16(_p) (*(u16 *)(_p)) #endif diff --git a/xen/common/unlzo.c b/xen/common/unlzo.c index 74056778eb..bdcefa95b3 100644 --- a/xen/common/unlzo.c +++ b/xen/common/unlzo.c @@ -34,7 +34,7 @@ =20 #ifdef __XEN__ #include -#include +#include #else =20 static inline u16 get_unaligned_be16(const void *p) diff --git a/xen/common/xz/private.h b/xen/common/xz/private.h index e6814250e8..2299705378 100644 --- a/xen/common/xz/private.h +++ b/xen/common/xz/private.h @@ -13,7 +13,7 @@ #ifdef __XEN__ #include #include -#include +#include #else =20 static inline u32 get_unaligned_le32(const void *p) diff --git a/xen/common/zstd/mem.h b/xen/common/zstd/mem.h index 2acae6a8ed..ae1e305126 100644 --- a/xen/common/zstd/mem.h +++ b/xen/common/zstd/mem.h @@ -23,7 +23,7 @@ #ifdef __XEN__ #include /* memcpy */ #include /* size_t, ptrdiff_t */ -#include +#include #endif =20 /*-**************************************** diff --git a/xen/lib/xxhash32.c b/xen/lib/xxhash32.c index e8d403e5ce..32efa651c5 100644 --- a/xen/lib/xxhash32.c +++ b/xen/lib/xxhash32.c @@ -42,7 +42,7 @@ #include #include #include -#include +#include =20 /*-************************************* * Macros diff --git a/xen/lib/xxhash64.c b/xen/lib/xxhash64.c index 481e76fbcf..1858e236fe 100644 --- a/xen/lib/xxhash64.c +++ b/xen/lib/xxhash64.c @@ -43,7 +43,7 @@ #include #include #include -#include +#include #endif =20 /*-************************************* --=20 2.35.3