From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AIpwx49AoSafK8oTS3Sf4h6ywwyGVYKhPcm3BLvBubHDeXRRNXbNPyyhFXHSJelHCdr25PCq4+y+ ARC-Seal: i=1; a=rsa-sha256; t=1523892343; cv=none; d=google.com; s=arc-20160816; b=AI16UzZiNxR55B3JlCali7CjwUqSKb6bvZyFGcMkx0/I+uPvF7AOPStOiCxs6uzjeb U6i4F2Q5wN7ng2+6guzoxO/EvFwqR/wXU7Nom+e5aONsmQERLXccHtmNRqjuGhN5YIQa mS+9xp4V20QgQ2TEdTZxqtrGPvNoJ7/dRk5tPB4c3eVRaz41Gbu8yseV+h1w17xBddQu qFNwzHNs1WvB+LbQcQgOKcqg+3SwBn1IHNu6a5nW4kn+2PosaNMT3W0XsMueMobp2XG2 /Ppw9Pt7RJkP0teEbjmw/ZQNuFClz70FIPv6WZsP1fewwI9uSs5yONrWpXstoQJLAclV /g6w== 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=3iy4hHBTYS8Y6OIhJpAvVb/NIIrv1CbReyBomjD1ntw=; b=qH52CoY4ZxyAKM3g7JsLk2Xigf3ejR51dbZipSpWDBxpv/fE01kj+S8TFquTjp9zbG ZocERp/PxSaRb9h1i6bWa/7yXBOUEPn6f5Yxt5vHLOotVR2SBfebsR/4Dq55joVwYrvC N7KGE7cyqhWfcTPAua7oIZSEZEqA67JGaDvPfCxpXvouFyiwewRBafO8ZPgKgMYRS0ch bvwGCGJG2LzCKrlK0jMY9XnN/Sq6p2ptMPSpcC2bAkBg2K42E9mMumw93xHGDa4m0iEj Dgao5N59QXkT/J8SmzPWzLb0s39m1KiDr+QjUSZXitlJ8xjoEaFlIKiSE8qtmj5pIz4I obdg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass (test mode) header.i=@8bytes.org header.s=mail-1 header.b=Z1mIzaE9; spf=pass (google.com: domain of joro@8bytes.org designates 2a01:238:4383:600:38bc:a715:4b6d:a889 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=Z1mIzaE9; spf=pass (google.com: domain of joro@8bytes.org designates 2a01:238:4383:600:38bc:a715:4b6d:a889 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 , "David H . Gutteridge" , jroedel@suse.de, joro@8bytes.org Subject: [PATCH 09/35] x86/entry/32: Introduce SAVE_ALL_NMI and RESTORE_ALL_NMI Date: Mon, 16 Apr 2018 17:24:57 +0200 Message-Id: <1523892323-14741-10-git-send-email-joro@8bytes.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1523892323-14741-1-git-send-email-joro@8bytes.org> References: <1523892323-14741-1-git-send-email-joro@8bytes.org> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1597916937991032749?= X-GMAIL-MSGID: =?utf-8?q?1597916937991032749?= 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 927df80..e2621bf 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) @@ -1166,7 +1173,7 @@ 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 @@ -1194,7 +1201,7 @@ ENTRY(nmi) .Lnmi_return: CHECK_AND_APPLY_ESPFIX - RESTORE_REGS 4 + RESTORE_ALL_NMI pop=4 jmp .Lirq_return #ifdef CONFIG_X86_ESPFIX32 @@ -1210,12 +1217,12 @@ 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