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h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rad8TiDptD9dxrBr88aLuHRAT2BqJnMfW2NRDjy71NJ6blsuHzH1615u85QXsH4wj E16+uJggojjz9XGF2WAQ9EoCro0yddSG/vgRc632ePGXFN2VBqVIRyZVPfPYidDOrb SMLSTJg8sBnzC+58NQK2lydD29xR2vaGVr/X5nGA= From: Mike Rapoport To: Andrew Morton Subject: [PATCH v2 14/17] x86/setup: simplify reserve_crashkernel() Date: Sun, 2 Aug 2020 19:35:58 +0300 Message-Id: <20200802163601.8189-15-rppt@kernel.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200802163601.8189-1-rppt@kernel.org> References: <20200802163601.8189-1-rppt@kernel.org> MIME-Version: 1.0 Cc: Thomas Gleixner , Emil Renner Berthing , linux-sh@vger.kernel.org, Peter Zijlstra , Benjamin Herrenschmidt , Dave Hansen , linux-mips@vger.kernel.org, Max Filippov , Paul Mackerras , sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org, Will Deacon , Christoph Hellwig , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, linux-c6x-dev@linux-c6x.org, Michael Ellerman , x86@kernel.org, Russell King , Mike Rapoport , clang-built-linux@googlegroups.com, Ingo Molnar , linux-arm-kernel@lists.infradead.org, Catalin Marinas , uclinux-h8-devel@lists.sourceforge.jp, linux-xtensa@linux-xtensa.org, openrisc@lists.librecores.org, Borislav Petkov , Andy Lutomirski , Paul Walmsley , Stafford Horne , Hari Bathini , Michal Simek , Yoshinori Sato , linux-mm@kvack.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Palmer Dabbelt , linuxppc-dev@lists.ozlabs.org, Mike Rapoport X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" From: Mike Rapoport * Replace magic numbers with defines * Replace memblock_find_in_range() + memblock_reserve() with memblock_phys_alloc_range() * Stop checking for low memory size in reserve_crashkernel_low(). The allocation from limited range will anyway fail if there is no enough memory, so there is no need for extra traversal of memblock.memory Signed-off-by: Mike Rapoport --- arch/x86/kernel/setup.c | 40 ++++++++++++++-------------------------- 1 file changed, 14 insertions(+), 26 deletions(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index d8de4053c5e8..d7ced6982524 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -419,13 +419,13 @@ static int __init reserve_crashkernel_low(void) { #ifdef CONFIG_X86_64 unsigned long long base, low_base = 0, low_size = 0; - unsigned long total_low_mem; + unsigned long low_mem_limit; int ret; - total_low_mem = memblock_mem_size(1UL << (32 - PAGE_SHIFT)); + low_mem_limit = min(memblock_phys_mem_size(), CRASH_ADDR_LOW_MAX); /* crashkernel=Y,low */ - ret = parse_crashkernel_low(boot_command_line, total_low_mem, &low_size, &base); + ret = parse_crashkernel_low(boot_command_line, low_mem_limit, &low_size, &base); if (ret) { /* * two parts from kernel/dma/swiotlb.c: @@ -443,23 +443,17 @@ static int __init reserve_crashkernel_low(void) return 0; } - low_base = memblock_find_in_range(0, 1ULL << 32, low_size, CRASH_ALIGN); + low_base = memblock_phys_alloc_range(low_size, CRASH_ALIGN, 0, CRASH_ADDR_LOW_MAX); if (!low_base) { pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n", (unsigned long)(low_size >> 20)); return -ENOMEM; } - ret = memblock_reserve(low_base, low_size); - if (ret) { - pr_err("%s: Error reserving crashkernel low memblock.\n", __func__); - return ret; - } - - pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n", + pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (low RAM limit: %ldMB)\n", (unsigned long)(low_size >> 20), (unsigned long)(low_base >> 20), - (unsigned long)(total_low_mem >> 20)); + (unsigned long)(low_mem_limit >> 20)); crashk_low_res.start = low_base; crashk_low_res.end = low_base + low_size - 1; @@ -503,13 +497,13 @@ static void __init reserve_crashkernel(void) * unless "crashkernel=size[KMG],high" is specified. */ if (!high) - crash_base = memblock_find_in_range(CRASH_ALIGN, - CRASH_ADDR_LOW_MAX, - crash_size, CRASH_ALIGN); + crash_base = memblock_phys_alloc_range(crash_size, + CRASH_ALIGN, CRASH_ALIGN, + CRASH_ADDR_LOW_MAX); if (!crash_base) - crash_base = memblock_find_in_range(CRASH_ALIGN, - CRASH_ADDR_HIGH_MAX, - crash_size, CRASH_ALIGN); + crash_base = memblock_phys_alloc_range(crash_size, + CRASH_ALIGN, CRASH_ALIGN, + CRASH_ADDR_HIGH_MAX); if (!crash_base) { pr_info("crashkernel reservation failed - No suitable area found.\n"); return; @@ -517,19 +511,13 @@ static void __init reserve_crashkernel(void) } else { unsigned long long start; - start = memblock_find_in_range(crash_base, - crash_base + crash_size, - crash_size, 1 << 20); + start = memblock_phys_alloc_range(crash_size, SZ_1M, crash_base, + crash_base + crash_size); if (start != crash_base) { pr_info("crashkernel reservation failed - memory is in use.\n"); return; } } - ret = memblock_reserve(crash_base, crash_size); - if (ret) { - pr_err("%s: Error reserving crashkernel memblock.\n", __func__); - return; - } if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) { memblock_free(crash_base, crash_size); -- 2.26.2 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu