From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELvt126eaaeMSbu1eurOSPET4QNwKrsob0eFaB4psQZfKvkkQkScRzYdrkikqX0Cnjo8X6du ARC-Seal: i=1; a=rsa-sha256; t=1521228603; cv=none; d=google.com; s=arc-20160816; b=NpHxViK82X7SF6lmv30w3KR4x795E/l3nedAJ+naH4J9CovGV7LSody6iIfAvYOhsb d9jInClyuiLznzW2iluEav8IohL9X4IjH9LJOEQJ6+RfZczaCqPvA1rL7EEMCr6YRENU BeMfwynQSX9eg4ZzPgFasqDCduQLiApmiYzL3V3wWD3brBH7j0tAV2sl9vJKKakLiS0b vp3nFAPCkE/RNcG8aoakzgSh00un6zxkGZv4k0Lzvfm+rQsZCqJYJZamBk7vffnQ4sJ1 I+0+PVYJSrLkyfbt9aSGfK5O57opoLYMGItfFr0v5Qawsrsd7EaZPECJWagE+Fjf5HZT JX2Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature:arc-authentication-results; bh=2jKrawzABq3WfJU6DRUBRZwDDKr+/Le1EWsmZepdzGI=; b=gV02O/J0rldjpHB48MNggXoPWo8ipzDP8vLzmyEd9mUH+SF/OE8OoILMd6eTi3o8jJ tKykdA225TLkwsgj5K5Zq9fuLzhFik4bFL4Qr3aJxyWvKaKC2UR4bp8UZmCpTz212VpV XNIbFIU0ppHcw7Bcmm7Y5Ase7oA/P7G+wUFYR3kqCwMDFw3/qNZx6HahOQOvLZSmdUDu tTdLoaEvr7Hfg3+4ZKtckuWPHK4AGpVuPxePlSOqGw4pVvJ1rNzFt/a52/fr0jhggjF/ jdfvb9LJpP6pTwouaAujcu2IpErOyn2EOqiwe3U2MEdR1872CoWutm0mNlvHW6VTNSFS XEUA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass (test mode) header.i=@8bytes.org header.s=mail-1 header.b=dQ6CNBSF; spf=pass (google.com: domain of joro@8bytes.org designates 81.169.241.247 as permitted sender) smtp.mailfrom=joro@8bytes.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=8bytes.org Authentication-Results: mx.google.com; dkim=pass (test mode) header.i=@8bytes.org header.s=mail-1 header.b=dQ6CNBSF; spf=pass (google.com: domain of joro@8bytes.org designates 81.169.241.247 as permitted sender) smtp.mailfrom=joro@8bytes.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=8bytes.org From: Joerg Roedel To: Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" Cc: x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds , Andy Lutomirski , Dave Hansen , Josh Poimboeuf , Juergen Gross , Peter Zijlstra , Borislav Petkov , Jiri Kosina , Boris Ostrovsky , Brian Gerst , David Laight , Denys Vlasenko , Eduardo Valentin , Greg KH , Will Deacon , aliguori@amazon.com, daniel.gruss@iaik.tugraz.at, hughd@google.com, keescook@google.com, Andrea Arcangeli , Waiman Long , Pavel Machek , jroedel@suse.de, joro@8bytes.org Subject: [PATCH 09/35] x86/entry/32: Introduce SAVE_ALL_NMI and RESTORE_ALL_NMI Date: Fri, 16 Mar 2018 20:29:27 +0100 Message-Id: <1521228593-3820-10-git-send-email-joro@8bytes.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1521228593-3820-1-git-send-email-joro@8bytes.org> References: <1521228593-3820-1-git-send-email-joro@8bytes.org> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1595123804123344873?= X-GMAIL-MSGID: =?utf-8?q?1595123804123344873?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Joerg Roedel These macros will be used in the NMI handler code and replace plain SAVE_ALL and RESTORE_REGS there. We will add the NMI-specific CR3-switch to these macros later. Signed-off-by: Joerg Roedel --- arch/x86/entry/entry_32.S | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index 73cde25..b60b3de 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -186,6 +186,9 @@ .endm +.macro SAVE_ALL_NMI + SAVE_ALL +.endm /* * This is a sneaky trick to help the unwinder find pt_regs on the stack. The * frame pointer is replaced with an encoded pointer to pt_regs. The encoding @@ -232,6 +235,10 @@ POP_GS_EX .endm +.macro RESTORE_ALL_NMI pop=0 + RESTORE_REGS pop=\pop +.endm + .macro CHECK_AND_APPLY_ESPFIX #ifdef CONFIG_X86_ESPFIX32 #define GDT_ESPFIX_SS PER_CPU_VAR(gdt_page) + (GDT_ENTRY_ESPFIX_SS * 8) @@ -1156,7 +1163,7 @@ ENTRY(nmi) #endif pushl %eax # pt_regs->orig_ax - SAVE_ALL + SAVE_ALL_NMI ENCODE_FRAME_POINTER xorl %edx, %edx # zero error code movl %esp, %eax # pt_regs pointer @@ -1184,7 +1191,7 @@ ENTRY(nmi) .Lnmi_return: CHECK_AND_APPLY_ESPFIX - RESTORE_REGS 4 + RESTORE_ALL_NMI pop=4 jmp .Lirq_return #ifdef CONFIG_X86_ESPFIX32 @@ -1200,12 +1207,12 @@ ENTRY(nmi) pushl 16(%esp) .endr pushl %eax - SAVE_ALL + SAVE_ALL_NMI ENCODE_FRAME_POINTER FIXUP_ESPFIX_STACK # %eax == %esp xorl %edx, %edx # zero error code call do_nmi - RESTORE_REGS + RESTORE_ALL_NMI lss 12+4(%esp), %esp # back to espfix stack jmp .Lirq_return #endif -- 2.7.4