From: Alexander Potapenko <glider@google.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
"the arch/x86 maintainers" <x86@kernel.org>,
Kostya Serebryany <kcc@google.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Taras Madan <tarasmadan@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
"H . J . Lu" <hjl.tools@gmail.com>,
Andi Kleen <ak@linux.intel.com>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
Linux Memory Management List <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCHv5 01/13] x86/mm: Fix CR3_ADDR_MASK
Date: Thu, 21 Jul 2022 15:10:18 +0200 [thread overview]
Message-ID: <CAG_fn=WmRsiCtGpYhdt7gqjqpRfp3-jsjCM7qH76GwvE56eT0w@mail.gmail.com> (raw)
In-Reply-To: <20220712231328.5294-2-kirill.shutemov@linux.intel.com>
On Wed, Jul 13, 2022 at 1:13 AM Kirill A. Shutemov
<kirill.shutemov@linux.intel.com> wrote:
>
> The mask must not include bits above physical address mask. These bits
> are reserved and can be used for other things. Bits 61 and 62 are used
> for Linear Address Masking.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Tested-by: Alexander Potapenko <glider@google.com>
> ---
> arch/x86/include/asm/processor-flags.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/include/asm/processor-flags.h b/arch/x86/include/asm/processor-flags.h
> index 02c2cbda4a74..a7f3d9100adb 100644
> --- a/arch/x86/include/asm/processor-flags.h
> +++ b/arch/x86/include/asm/processor-flags.h
> @@ -35,7 +35,7 @@
> */
> #ifdef CONFIG_X86_64
> /* Mask off the address space ID and SME encryption bits. */
> -#define CR3_ADDR_MASK __sme_clr(0x7FFFFFFFFFFFF000ull)
> +#define CR3_ADDR_MASK __sme_clr(PHYSICAL_PAGE_MASK)
> #define CR3_PCID_MASK 0xFFFull
> #define CR3_NOFLUSH BIT_ULL(63)
>
> --
> 2.35.1
>
--
Alexander Potapenko
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next prev parent reply other threads:[~2022-07-21 13:10 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-12 23:13 [PATCHv5 00/13] Linear Address Masking enabling Kirill A. Shutemov
2022-07-12 23:13 ` [PATCHv5 01/13] x86/mm: Fix CR3_ADDR_MASK Kirill A. Shutemov
2022-07-21 13:10 ` Alexander Potapenko [this message]
2022-07-29 3:00 ` Hu, Robert
2022-07-12 23:13 ` [PATCHv5 02/13] x86: CPUID and CR3/CR4 flags for Linear Address Masking Kirill A. Shutemov
2022-07-21 13:10 ` Alexander Potapenko
2022-07-12 23:13 ` [PATCHv5 03/13] mm: Pass down mm_struct to untagged_addr() Kirill A. Shutemov
2022-07-21 13:12 ` Alexander Potapenko
2022-07-12 23:13 ` [PATCHv5 04/13] x86/mm: Handle LAM on context switch Kirill A. Shutemov
2022-07-12 23:13 ` [PATCHv5 05/13] x86/uaccess: Provide untagged_addr() and remove tags before address check Kirill A. Shutemov
2022-07-13 15:02 ` [PATCHv5.1 04/13] x86/mm: Handle LAM on context switch Kirill A. Shutemov
2022-07-20 8:57 ` Alexander Potapenko
2022-07-20 12:38 ` Kirill A. Shutemov
2022-07-21 13:13 ` Alexander Potapenko
2022-07-21 13:14 ` [PATCHv5 05/13] x86/uaccess: Provide untagged_addr() and remove tags before address check Alexander Potapenko
2022-07-12 23:13 ` [PATCHv5 06/13] x86/mm: Provide ARCH_GET_UNTAG_MASK and ARCH_ENABLE_TAGGED_ADDR Kirill A. Shutemov
2022-07-18 17:47 ` Alexander Potapenko
2022-07-20 0:57 ` Kirill A. Shutemov
2022-07-20 8:19 ` Alexander Potapenko
2022-07-20 12:47 ` Kirill A. Shutemov
2022-07-20 12:54 ` Alexander Potapenko
2022-07-12 23:13 ` [PATCHv5 07/13] x86: Expose untagging mask in /proc/$PID/arch_status Kirill A. Shutemov
2022-07-21 13:47 ` Alexander Potapenko
2022-07-12 23:13 ` [PATCHv5 08/13] selftests/x86/lam: Add malloc test cases for linear-address masking Kirill A. Shutemov
2022-07-12 23:13 ` [PATCHv5 09/13] selftests/x86/lam: Add mmap and SYSCALL " Kirill A. Shutemov
2022-07-12 23:13 ` [PATCHv5 10/13] selftests/x86/lam: Add io_uring " Kirill A. Shutemov
2022-07-12 23:13 ` [PATCHv5 11/13] selftests/x86/lam: Add inherit " Kirill A. Shutemov
2022-07-12 23:13 ` [PATCHv5 OPTIONAL 12/13] x86/mm: Extend LAM to support to LAM_U48 Kirill A. Shutemov
2022-07-12 23:13 ` [PATCHv5 OPTIONAL 13/13] selftests/x86/lam: Add tests cases for LAM_U48 Kirill A. Shutemov
2022-07-18 17:39 ` [PATCHv5 00/13] Linear Address Masking enabling Alexander Potapenko
2022-07-20 0:59 ` Kirill A. Shutemov
2022-07-21 13:09 ` Alexander Potapenko
2022-07-21 17:07 ` Dave Hansen
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