From patchwork Sat May 26 07:20:16 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Ravnborg X-Patchwork-Id: 161461 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 6CC87B6FA0 for ; Sat, 26 May 2012 17:20:30 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751161Ab2EZHU1 (ORCPT ); Sat, 26 May 2012 03:20:27 -0400 Received: from smtp.snhosting.dk ([87.238.248.203]:54541 "EHLO smtp.domainteam.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751166Ab2EZHUX (ORCPT ); Sat, 26 May 2012 03:20:23 -0400 Received: from localhost.localdomain (unknown [188.228.89.252]) by smtp.domainteam.dk (Postfix) with ESMTPA id 0434BF1C79; Sat, 26 May 2012 09:20:22 +0200 (CEST) From: Sam Ravnborg To: "David S. Miller" Cc: sparclinux , Daniel Hellstrom , Konrad Eisele , Sam Ravnborg Subject: [PATCH 12/15] sparc32: introduce support for run-time patching for all shared assembler code Date: Sat, 26 May 2012 09:20:16 +0200 Message-Id: <1338016819-22245-12-git-send-email-sam@ravnborg.org> X-Mailer: git-send-email 1.6.0.6 In-Reply-To: <20120526071749.GA22144@merkur.ravnborg.org> References: <20120526071749.GA22144@merkur.ravnborg.org> Sender: sparclinux-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: sparclinux@vger.kernel.org All users of MMUREGS ASI in kernel/ now uses run-time patching. Signed-off-by: Sam Ravnborg Cc: Daniel Hellstrom Cc: Konrad Eisele --- arch/sparc/kernel/entry.S | 7 +++++-- arch/sparc/kernel/etrap_32.S | 18 +++++++++++++----- arch/sparc/kernel/rtrap_32.S | 18 ++++++++++++------ arch/sparc/kernel/wof.S | 18 ++++++++++++------ arch/sparc/kernel/wuf.S | 27 +++++++++++++++++---------- 5 files changed, 59 insertions(+), 29 deletions(-) diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S index 8550f10..dcaa1cf 100644 --- a/arch/sparc/kernel/entry.S +++ b/arch/sparc/kernel/entry.S @@ -767,8 +767,11 @@ srmmu_fault: mov 0x400, %l5 mov 0x300, %l4 - lda [%l5] ASI_M_MMUREGS, %l6 ! read sfar first - lda [%l4] ASI_M_MMUREGS, %l5 ! read sfsr last +LEON_PI(lda [%l5] ASI_LEON_MMUREGS, %l6) ! read sfar first +SUN_PI_(lda [%l5] ASI_M_MMUREGS, %l6) ! read sfar first + +LEON_PI(lda [%l4] ASI_LEON_MMUREGS, %l5) ! read sfsr last +SUN_PI_(lda [%l4] ASI_M_MMUREGS, %l5) ! read sfsr last andn %l6, 0xfff, %l6 srl %l5, 6, %l5 ! and encode all info into l7 diff --git a/arch/sparc/kernel/etrap_32.S b/arch/sparc/kernel/etrap_32.S index 84b5f0d..e3e80d6 100644 --- a/arch/sparc/kernel/etrap_32.S +++ b/arch/sparc/kernel/etrap_32.S @@ -234,7 +234,8 @@ tsetup_srmmu_stackchk: cmp %glob_tmp, %sp bleu,a 1f - lda [%g0] ASI_M_MMUREGS, %glob_tmp ! read MMU control +LEON_PI( lda [%g0] ASI_LEON_MMUREGS, %glob_tmp) ! read MMU control +SUN_PI_( lda [%g0] ASI_M_MMUREGS, %glob_tmp) ! read MMU control trap_setup_user_stack_is_bolixed: /* From user/kernel into invalid window w/bad user @@ -249,18 +250,25 @@ trap_setup_user_stack_is_bolixed: 1: /* Clear the fault status and turn on the no_fault bit. */ or %glob_tmp, 0x2, %glob_tmp ! or in no_fault bit - sta %glob_tmp, [%g0] ASI_M_MMUREGS ! set it +LEON_PI(sta %glob_tmp, [%g0] ASI_LEON_MMUREGS) ! set it +SUN_PI_(sta %glob_tmp, [%g0] ASI_M_MMUREGS) ! set it /* Dump the registers and cross fingers. */ STORE_WINDOW(sp) /* Clear the no_fault bit and check the status. */ andn %glob_tmp, 0x2, %glob_tmp - sta %glob_tmp, [%g0] ASI_M_MMUREGS +LEON_PI(sta %glob_tmp, [%g0] ASI_LEON_MMUREGS) +SUN_PI_(sta %glob_tmp, [%g0] ASI_M_MMUREGS) + mov AC_M_SFAR, %glob_tmp - lda [%glob_tmp] ASI_M_MMUREGS, %g0 +LEON_PI(lda [%glob_tmp] ASI_LEON_MMUREGS, %g0) +SUN_PI_(lda [%glob_tmp] ASI_M_MMUREGS, %g0) + mov AC_M_SFSR, %glob_tmp - lda [%glob_tmp] ASI_M_MMUREGS, %glob_tmp ! save away status of winstore +LEON_PI(lda [%glob_tmp] ASI_LEON_MMUREGS, %glob_tmp)! save away status of winstore +SUN_PI_(lda [%glob_tmp] ASI_M_MMUREGS, %glob_tmp) ! save away status of winstore + andcc %glob_tmp, 0x2, %g0 ! did we fault? bne trap_setup_user_stack_is_bolixed ! failure nop diff --git a/arch/sparc/kernel/rtrap_32.S b/arch/sparc/kernel/rtrap_32.S index 7abc24e..6c34de0 100644 --- a/arch/sparc/kernel/rtrap_32.S +++ b/arch/sparc/kernel/rtrap_32.S @@ -231,11 +231,14 @@ srmmu_rett_stackchk: cmp %g1, %fp bleu ret_trap_user_stack_is_bolixed mov AC_M_SFSR, %g1 - lda [%g1] ASI_M_MMUREGS, %g0 +LEON_PI(lda [%g1] ASI_LEON_MMUREGS, %g0) +SUN_PI_(lda [%g1] ASI_M_MMUREGS, %g0) - lda [%g0] ASI_M_MMUREGS, %g1 +LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %g1) +SUN_PI_(lda [%g0] ASI_M_MMUREGS, %g1) or %g1, 0x2, %g1 - sta %g1, [%g0] ASI_M_MMUREGS +LEON_PI(sta %g1, [%g0] ASI_LEON_MMUREGS) +SUN_PI_(sta %g1, [%g0] ASI_M_MMUREGS) restore %g0, %g0, %g0 @@ -244,13 +247,16 @@ srmmu_rett_stackchk: save %g0, %g0, %g0 andn %g1, 0x2, %g1 - sta %g1, [%g0] ASI_M_MMUREGS +LEON_PI(sta %g1, [%g0] ASI_LEON_MMUREGS) +SUN_PI_(sta %g1, [%g0] ASI_M_MMUREGS) mov AC_M_SFAR, %g2 - lda [%g2] ASI_M_MMUREGS, %g2 +LEON_PI(lda [%g2] ASI_LEON_MMUREGS, %g2) +SUN_PI_(lda [%g2] ASI_M_MMUREGS, %g2) mov AC_M_SFSR, %g1 - lda [%g1] ASI_M_MMUREGS, %g1 +LEON_PI(lda [%g1] ASI_LEON_MMUREGS, %g1) +SUN_PI_(lda [%g1] ASI_M_MMUREGS, %g1) andcc %g1, 0x2, %g0 be ret_trap_userwins_ok nop diff --git a/arch/sparc/kernel/wof.S b/arch/sparc/kernel/wof.S index 4c2de3c..28a7bc6 100644 --- a/arch/sparc/kernel/wof.S +++ b/arch/sparc/kernel/wof.S @@ -332,24 +332,30 @@ spwin_srmmu_stackchk: mov AC_M_SFSR, %glob_tmp /* Clear the fault status and turn on the no_fault bit. */ - lda [%glob_tmp] ASI_M_MMUREGS, %g0 ! eat SFSR +LEON_PI(lda [%glob_tmp] ASI_LEON_MMUREGS, %g0) ! eat SFSR +SUN_PI_(lda [%glob_tmp] ASI_M_MMUREGS, %g0) ! eat SFSR - lda [%g0] ASI_M_MMUREGS, %glob_tmp ! read MMU control +LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %glob_tmp) ! read MMU control +SUN_PI_(lda [%g0] ASI_M_MMUREGS, %glob_tmp) ! read MMU control or %glob_tmp, 0x2, %glob_tmp ! or in no_fault bit - sta %glob_tmp, [%g0] ASI_M_MMUREGS ! set it +LEON_PI(sta %glob_tmp, [%g0] ASI_LEON_MMUREGS) ! set it +SUN_PI_(sta %glob_tmp, [%g0] ASI_M_MMUREGS) ! set it /* Dump the registers and cross fingers. */ STORE_WINDOW(sp) /* Clear the no_fault bit and check the status. */ andn %glob_tmp, 0x2, %glob_tmp - sta %glob_tmp, [%g0] ASI_M_MMUREGS +LEON_PI(sta %glob_tmp, [%g0] ASI_LEON_MMUREGS) +SUN_PI_(sta %glob_tmp, [%g0] ASI_M_MMUREGS) mov AC_M_SFAR, %glob_tmp - lda [%glob_tmp] ASI_M_MMUREGS, %g0 +LEON_PI(lda [%glob_tmp] ASI_LEON_MMUREGS, %g0) +SUN_PI_(lda [%glob_tmp] ASI_M_MMUREGS, %g0) mov AC_M_SFSR, %glob_tmp - lda [%glob_tmp] ASI_M_MMUREGS, %glob_tmp +LEON_PI(lda [%glob_tmp] ASI_LEON_MMUREGS, %glob_tmp) +SUN_PI_(lda [%glob_tmp] ASI_M_MMUREGS, %glob_tmp) andcc %glob_tmp, 0x2, %g0 ! did we fault? be,a spwin_finish_up + 0x4 ! cool beans, success restore %g0, %g0, %g0 diff --git a/arch/sparc/kernel/wuf.S b/arch/sparc/kernel/wuf.S index 9fde91a..2c21cc5 100644 --- a/arch/sparc/kernel/wuf.S +++ b/arch/sparc/kernel/wuf.S @@ -254,16 +254,19 @@ srmmu_fwin_stackchk: mov AC_M_SFSR, %l4 cmp %l5, %sp bleu fwin_user_stack_is_bolixed - lda [%l4] ASI_M_MMUREGS, %g0 ! clear fault status +LEON_PI( lda [%l4] ASI_LEON_MMUREGS, %g0) ! clear fault status +SUN_PI_( lda [%l4] ASI_M_MMUREGS, %g0) ! clear fault status /* The technique is, turn off faults on this processor, * just let the load rip, then check the sfsr to see if * a fault did occur. Then we turn on fault traps again * and branch conditionally based upon what happened. */ - lda [%g0] ASI_M_MMUREGS, %l5 ! read mmu-ctrl reg +LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %l5) ! read mmu-ctrl reg +SUN_PI_(lda [%g0] ASI_M_MMUREGS, %l5) ! read mmu-ctrl reg or %l5, 0x2, %l5 ! turn on no-fault bit - sta %l5, [%g0] ASI_M_MMUREGS ! store it +LEON_PI(sta %l5, [%g0] ASI_LEON_MMUREGS) ! store it +SUN_PI_(sta %l5, [%g0] ASI_M_MMUREGS) ! store it /* Cross fingers and go for it. */ LOAD_WINDOW(sp) @@ -275,18 +278,22 @@ srmmu_fwin_stackchk: /* LOCATION: Window 'T' */ - lda [%g0] ASI_M_MMUREGS, %twin_tmp1 ! load mmu-ctrl again - andn %twin_tmp1, 0x2, %twin_tmp1 ! clear no-fault bit - sta %twin_tmp1, [%g0] ASI_M_MMUREGS ! store it +LEON_PI(lda [%g0] ASI_LEON_MMUREGS, %twin_tmp1) ! load mmu-ctrl again +SUN_PI_(lda [%g0] ASI_M_MMUREGS, %twin_tmp1) ! load mmu-ctrl again + andn %twin_tmp1, 0x2, %twin_tmp1 ! clear no-fault bit +LEON_PI(sta %twin_tmp1, [%g0] ASI_LEON_MMUREGS) ! store it +SUN_PI_(sta %twin_tmp1, [%g0] ASI_M_MMUREGS) ! store it mov AC_M_SFAR, %twin_tmp2 - lda [%twin_tmp2] ASI_M_MMUREGS, %g0 ! read fault address +LEON_PI(lda [%twin_tmp2] ASI_LEON_MMUREGS, %g0) ! read fault address +SUN_PI_(lda [%twin_tmp2] ASI_M_MMUREGS, %g0) ! read fault address mov AC_M_SFSR, %twin_tmp2 - lda [%twin_tmp2] ASI_M_MMUREGS, %twin_tmp2 ! read fault status - andcc %twin_tmp2, 0x2, %g0 ! did fault occur? +LEON_PI(lda [%twin_tmp2] ASI_LEON_MMUREGS, %twin_tmp2) ! read fault status +SUN_PI_(lda [%twin_tmp2] ASI_M_MMUREGS, %twin_tmp2) ! read fault status + andcc %twin_tmp2, 0x2, %g0 ! did fault occur? - bne 1f ! yep, cleanup + bne 1f ! yep, cleanup nop wr %t_psr, 0x0, %psr