From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chintan Pandya Subject: [PATCH v4 3/3] Revert "arm64: Enforce BBM for huge IO/VMAP mappings" Date: Tue, 20 Mar 2018 17:15:14 +0530 Message-ID: <1521546314-31753-4-git-send-email-cpandya@codeaurora.org> References: <1521546314-31753-1-git-send-email-cpandya@codeaurora.org> Return-path: In-Reply-To: <1521546314-31753-1-git-send-email-cpandya@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org To: catalin.marinas@arm.com, will.deacon@arm.com, mark.rutland@arm.com Cc: arnd@arndb.de, ard.biesheuvel@linaro.org, marc.zyngier@arm.com, james.morse@arm.com, kristina.martsenko@arm.com, takahiro.akashi@linaro.org, gregkh@linuxfoundation.org, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, akpm@linux-foundation.org, toshi.kani@hpe.com, Chintan Pandya List-Id: linux-arch.vger.kernel.org This commit 15122ee2c515a ("arm64: Enforce BBM for huge IO/VMAP mappings") is a temporary work-around until the issues with CONFIG_HAVE_ARCH_HUGE_VMAP gets fixed. Revert this change as we have fixes for the issue. Signed-off-by: Chintan Pandya --- arch/arm64/mm/mmu.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 7be3106..1238717 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -935,10 +935,6 @@ int pud_set_huge(pud_t *pudp, phys_addr_t phys, pgprot_t prot) pgprot_t sect_prot = __pgprot(PUD_TYPE_SECT | pgprot_val(mk_sect_prot(prot))); - /* ioremap_page_range doesn't honour BBM */ - if (pud_present(READ_ONCE(*pudp))) - return 0; - BUG_ON(phys & ~PUD_MASK); set_pud(pudp, pfn_pud(__phys_to_pfn(phys), sect_prot)); return 1; @@ -949,10 +945,6 @@ int pmd_set_huge(pmd_t *pmdp, phys_addr_t phys, pgprot_t prot) pgprot_t sect_prot = __pgprot(PMD_TYPE_SECT | pgprot_val(mk_sect_prot(prot))); - /* ioremap_page_range doesn't honour BBM */ - if (pmd_present(READ_ONCE(*pmdp))) - return 0; - BUG_ON(phys & ~PMD_MASK); set_pmd(pmdp, pfn_pmd(__phys_to_pfn(phys), sect_prot)); return 1; -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc., is a member of Code Aurora Forum, a Linux Foundation Collaborative Project From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.codeaurora.org ([198.145.29.96]:52822 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752808AbeCTLqX (ORCPT ); Tue, 20 Mar 2018 07:46:23 -0400 From: Chintan Pandya Subject: [PATCH v4 3/3] Revert "arm64: Enforce BBM for huge IO/VMAP mappings" Date: Tue, 20 Mar 2018 17:15:14 +0530 Message-ID: <1521546314-31753-4-git-send-email-cpandya@codeaurora.org> In-Reply-To: <1521546314-31753-1-git-send-email-cpandya@codeaurora.org> References: <1521546314-31753-1-git-send-email-cpandya@codeaurora.org> Sender: linux-arch-owner@vger.kernel.org List-ID: To: catalin.marinas@arm.com, will.deacon@arm.com, mark.rutland@arm.com Cc: arnd@arndb.de, ard.biesheuvel@linaro.org, marc.zyngier@arm.com, james.morse@arm.com, kristina.martsenko@arm.com, takahiro.akashi@linaro.org, gregkh@linuxfoundation.org, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, akpm@linux-foundation.org, toshi.kani@hpe.com, Chintan Pandya Message-ID: <20180320114514.lFEteefG-Si3bDLkcDM78WVE2rkqnBmpJEA2MeEFSJw@z> This commit 15122ee2c515a ("arm64: Enforce BBM for huge IO/VMAP mappings") is a temporary work-around until the issues with CONFIG_HAVE_ARCH_HUGE_VMAP gets fixed. Revert this change as we have fixes for the issue. Signed-off-by: Chintan Pandya --- arch/arm64/mm/mmu.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 7be3106..1238717 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -935,10 +935,6 @@ int pud_set_huge(pud_t *pudp, phys_addr_t phys, pgprot_t prot) pgprot_t sect_prot = __pgprot(PUD_TYPE_SECT | pgprot_val(mk_sect_prot(prot))); - /* ioremap_page_range doesn't honour BBM */ - if (pud_present(READ_ONCE(*pudp))) - return 0; - BUG_ON(phys & ~PUD_MASK); set_pud(pudp, pfn_pud(__phys_to_pfn(phys), sect_prot)); return 1; @@ -949,10 +945,6 @@ int pmd_set_huge(pmd_t *pmdp, phys_addr_t phys, pgprot_t prot) pgprot_t sect_prot = __pgprot(PMD_TYPE_SECT | pgprot_val(mk_sect_prot(prot))); - /* ioremap_page_range doesn't honour BBM */ - if (pmd_present(READ_ONCE(*pmdp))) - return 0; - BUG_ON(phys & ~PMD_MASK); set_pmd(pmdp, pfn_pmd(__phys_to_pfn(phys), sect_prot)); return 1; -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc., is a member of Code Aurora Forum, a Linux Foundation Collaborative Project