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From: Yinghai Lu <yinghai@kernel.org>
To: Jacob Shin <jacob.shin@amd.com>
Cc: X86-ML <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
	"H. Peter Anvin" <hpa@zytor.com>, Tejun Heo <tj@kernel.org>,
	Dave Young <dyoung@redhat.com>, Chao Wang <chaowang@redhat.com>,
	Vivek Goyal <vgoyal@redhat.com>,
	Andreas Herrmann <andreas.herrmann3@amd.com>,
	Borislav Petkov <borislav.petkov@amd.com>
Subject: Re: [PATCH 5/6] x86: Fixup code testing if a pfn is direct mapped
Date: Wed, 29 Aug 2012 14:02:40 -0700	[thread overview]
Message-ID: <CAE9FiQUso7DWyGu8Xi3DjZDP3+8xrpow36DOv9KogHFBdjOMmQ@mail.gmail.com> (raw)
In-Reply-To: <1346267046-6724-6-git-send-email-jacob.shin@amd.com>

On Wed, Aug 29, 2012 at 12:04 PM, Jacob Shin <jacob.shin@amd.com> wrote:
> Update code that previously assumed pfns [ 0 - max_low_pfn_mapped ) and
> [ 4GB - max_pfn_mapped ) were always direct mapped, to now look up
> pfn_mapped ranges instead.

please swap patch 5 and patch 4 applying sequence.

aka.
should have
[PATCH 4/6] x86:Fixup code testing if a pfn is direct mapped
and it should have dummy function

bool pfn_range_is_mapped(u64 start_pfn, u64 end_pfn)
{
               return  end_pfn <= max_low_pfn_mapped
                   || (end_pfn > (1UL << (32 - PAGE_SHIFT))
                       && end_pfn <= max_pfn_mapped);
}

and

[PATCH 5/6] x86: Only direct map addresses that are marked as E820_RAM
will update pfn_range_is_mapped accordingly.

Thanks

Yinghai

  reply	other threads:[~2012-08-29 21:02 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-29 19:04 [PATCH V5 0/6] x86: Create direct mappings for E820_RAM only Jacob Shin
2012-08-29 19:04 ` [PATCH 1/6] x86, mm: Add page_size_mask() Jacob Shin
2012-08-29 19:04 ` [PATCH 2/6] x86, mm: Split out split_mem_range Jacob Shin
2012-08-29 19:04 ` [PATCH 3/6] x86/mm: find_early_table_space based on memory ranges that are being mapped Jacob Shin
2012-08-29 19:04 ` [PATCH 4/6] x86: Only direct map addresses that are marked as E820_RAM Jacob Shin
2012-08-29 21:17   ` Yinghai Lu
2012-08-29 21:32     ` Borislav Petkov
2012-08-30  6:28       ` H. Peter Anvin
2012-08-30 23:06         ` [PATCH 0/8] x86, mm: init_memory_mapping cleanup Yinghai Lu
2012-08-30 23:06           ` [PATCH 1/8] x86, mm: Add global page_size_mask Yinghai Lu
2012-08-30 23:06           ` [PATCH 2/8] x86, mm: Split out split_mem_range Yinghai Lu
2012-08-30 23:06           ` [PATCH 3/8] x86, mm: Moving init_memory_mapping calling Yinghai Lu
2012-08-30 23:06           ` [PATCH 4/8] x86, mm: Revert back good_end setting for 64bit Yinghai Lu
2012-08-30 23:06           ` [PATCH 5/8] x86, mm: Find early page table only one time Yinghai Lu
2012-08-30 23:06           ` [PATCH 6/8] x86: if kernel .text .data .bss are not marked as E820_RAM, complain and fix Yinghai Lu
2012-08-30 23:06           ` [PATCH 7/8] x86: Fixup code testing if a pfn is direct mapped Yinghai Lu
2012-08-30 23:06           ` [PATCH 8/8] x86: Only direct map addresses that are marked as E820_RAM Yinghai Lu
2012-08-30 23:14           ` [PATCH 0/8] x86, mm: init_memory_mapping cleanup Yinghai Lu
2012-08-30 23:22           ` Jacob Shin
2012-08-29 21:46     ` [PATCH 4/6] x86: Only direct map addresses that are marked as E820_RAM Jacob Shin
2012-08-29 19:04 ` [PATCH 5/6] x86: Fixup code testing if a pfn is direct mapped Jacob Shin
2012-08-29 21:02   ` Yinghai Lu [this message]
2012-08-29 19:04 ` [PATCH 6/6] x86: if kernel .text .data .bss are not marked as E820_RAM, complain and fix Jacob Shin

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