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From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Arnd Bergmann <arnd@arndb.de>,
	"H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <ak@linux.intel.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Andy Lutomirski <luto@amacapital.net>,
	linux-arch@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, xen-devel <xen-devel@lists.xen.org>,
	Juergen Gross <jgross@suse.com>
Subject: Re: [PATCHv4 28/33] x86/mm: add support of additional page table level during early boot
Date: Mon, 6 Mar 2017 15:05:49 -0500	[thread overview]
Message-ID: <7e78a76a-f5e8-bb60-e5be-a91a84faa1f9@oracle.com> (raw)
In-Reply-To: <20170306135357.3124-29-kirill.shutemov@linux.intel.com>


> diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
> index 9991224f6238..c9e41f1599dd 100644
> --- a/arch/x86/include/asm/pgtable_64.h
> +++ b/arch/x86/include/asm/pgtable_64.h
> @@ -14,15 +14,17 @@
>  #include <linux/bitops.h>
>  #include <linux/threads.h>
>  
> +extern p4d_t level4_kernel_pgt[512];
> +extern p4d_t level4_ident_pgt[512];
>  extern pud_t level3_kernel_pgt[512];
>  extern pud_t level3_ident_pgt[512];
>  extern pmd_t level2_kernel_pgt[512];
>  extern pmd_t level2_fixmap_pgt[512];
>  extern pmd_t level2_ident_pgt[512];
>  extern pte_t level1_fixmap_pgt[512];
> -extern pgd_t init_level4_pgt[];
> +extern pgd_t init_top_pgt[];
>  
> -#define swapper_pg_dir init_level4_pgt
> +#define swapper_pg_dir init_top_pgt
>  
>  extern void paging_init(void);
>  


This means you also need


diff --git a/arch/x86/xen/xen-pvh.S b/arch/x86/xen/xen-pvh.S
index 5e24671..e1a5fbe 100644
--- a/arch/x86/xen/xen-pvh.S
+++ b/arch/x86/xen/xen-pvh.S
@@ -87,7 +87,7 @@ ENTRY(pvh_start_xen)
        wrmsr
 
        /* Enable pre-constructed page tables. */
-       mov $_pa(init_level4_pgt), %eax
+       mov $_pa(init_top_pgt), %eax
        mov %eax, %cr3
        mov $(X86_CR0_PG | X86_CR0_PE), %eax
        mov %eax, %cr0


-boris

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  reply	other threads:[~2017-03-06 20:04 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-06 13:53 [PATCHv4 00/33] 5-level paging Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 01/33] x86/cpufeature: Add 5-level paging detection Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 02/33] asm-generic: introduce 5level-fixup.h Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 03/33] asm-generic: introduce __ARCH_USE_5LEVEL_HACK Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 04/33] arch, mm: convert all architectures to use 5level-fixup.h Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 05/33] asm-generic: introduce <asm-generic/pgtable-nop4d.h> Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 06/33] mm: convert generic code to 5-level paging Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 07/33] mm: introduce __p4d_alloc() Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 08/33] x86: basic changes into headers for 5-level paging Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 09/33] x86: trivial portion of 5-level paging conversion Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 10/33] x86/gup: add 5-level paging support Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 11/33] x86/ident_map: " Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 12/33] x86/mm: add support of p4d_t in vmalloc_fault() Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 13/33] x86/power: support p4d_t in hibernate code Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 14/33] x86/kexec: support p4d_t Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 15/33] x86/efi: handle p4d in EFI pagetables Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 16/33] x86/mm/pat: handle additional page table Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 17/33] x86/kasan: prepare clear_pgds() to switch to <asm-generic/pgtable-nop4d.h> Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 18/33] x86/xen: convert __xen_pgd_walk() and xen_cleanmfnmap() to support p4d Kirill A. Shutemov
2017-03-06 20:48   ` Boris Ostrovsky
2017-03-07 13:00     ` Kirill A. Shutemov
2017-03-07 18:18       ` Boris Ostrovsky
2017-03-07 18:26         ` [Xen-devel] " Andrew Cooper
2017-03-07 18:45           ` Boris Ostrovsky
2017-03-06 13:53 ` [PATCHv4 19/33] x86: convert the rest of the code to support p4d_t Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 20/33] x86: detect 5-level paging support Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 21/33] x86/asm: remove __VIRTUAL_MASK_SHIFT==47 assert Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 22/33] x86/mm: define virtual memory map for 5-level paging Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 23/33] x86/paravirt: make paravirt code support " Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 24/33] x86/mm: basic defines/helpers for CONFIG_X86_5LEVEL Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 25/33] x86/dump_pagetables: support 5-level paging Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 26/33] x86/kasan: extend to " Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 27/33] x86/espfix: " Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 28/33] x86/mm: add support of additional page table level during early boot Kirill A. Shutemov
2017-03-06 20:05   ` Boris Ostrovsky [this message]
2017-03-06 20:23     ` Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 29/33] x86/mm: add sync_global_pgds() for configuration with 5-level paging Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 30/33] x86/mm: make kernel_physical_mapping_init() support " Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 31/33] x86/mm: add support for 5-level paging for KASLR Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 32/33] x86: enable 5-level paging support Kirill A. Shutemov
2017-03-06 13:53 ` [PATCHv4 33/33] x86/mm: allow to have userspace mappigs above 47-bits Kirill A. Shutemov
2017-03-06 18:27 ` [PATCHv4 00/33] 5-level paging Linus Torvalds
2017-03-06 18:42   ` Thomas Gleixner
2017-03-06 19:03     ` Linus Torvalds
2017-03-06 19:09       ` Kirill A. Shutemov
2017-03-06 19:35         ` Linus Torvalds
2017-03-07  0:41     ` Stephen Rothwell
2017-03-07  9:32       ` Thomas Gleixner

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