From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>
Cc: x86@kernel.org, Kostya Serebryany <kcc@google.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Alexander Potapenko <glider@google.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-mm@kvack.org, linux-kernel@vger.kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCHv6 01/11] x86/mm: Fix CR3_ADDR_MASK
Date: Mon, 15 Aug 2022 07:17:53 +0300 [thread overview]
Message-ID: <20220815041803.17954-2-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <20220815041803.17954-1-kirill.shutemov@linux.intel.com>
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
next prev parent reply other threads:[~2022-08-15 4:15 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-15 4:17 [PATCHv6 00/11] Linear Address Masking enabling Kirill A. Shutemov
2022-08-15 4:17 ` Kirill A. Shutemov [this message]
2022-08-15 4:17 ` [PATCHv6 02/11] x86: CPUID and CR3/CR4 flags for Linear Address Masking Kirill A. Shutemov
2022-08-15 4:17 ` [PATCHv6 03/11] mm: Pass down mm_struct to untagged_addr() Kirill A. Shutemov
2022-08-15 4:17 ` [PATCHv6 04/11] x86/mm: Handle LAM on context switch Kirill A. Shutemov
2022-08-15 13:33 ` Peter Zijlstra
2022-08-15 13:42 ` Peter Zijlstra
2022-08-15 17:37 ` Kirill A. Shutemov
2022-08-15 18:02 ` Peter Zijlstra
2022-08-16 0:07 ` [PATCHv6.1 " Kirill A. Shutemov
2022-08-15 4:17 ` [PATCHv6 05/11] x86/uaccess: Provide untagged_addr() and remove tags before address check Kirill A. Shutemov
2022-08-15 4:17 ` [PATCHv6 06/11] x86/mm: Provide arch_prctl() interface for LAM Kirill A. Shutemov
2022-08-15 13:37 ` Peter Zijlstra
2022-08-15 17:52 ` Kirill A. Shutemov
2022-08-16 0:10 ` [PATCHv6.1 " Kirill A. Shutemov
2022-08-22 9:32 ` [PATCHv6 " Alexander Potapenko
2022-08-23 13:16 ` Alexander Potapenko
2022-08-15 4:17 ` [PATCHv6 07/11] x86: Expose untagging mask in /proc/$PID/arch_status Kirill A. Shutemov
2022-08-15 4:18 ` [PATCHv6 08/11] selftests/x86/lam: Add malloc and tag-bits test cases for linear-address masking Kirill A. Shutemov
2022-08-19 5:17 ` Hu, Robert
2022-08-22 5:21 ` Zhang, Weihong
2022-08-15 4:18 ` [PATCHv6 09/11] selftests/x86/lam: Add mmap and SYSCALL " Kirill A. Shutemov
2022-08-19 8:15 ` Hu, Robert
2022-08-22 8:47 ` Zhang, Weihong
2022-08-15 4:18 ` [PATCHv6 10/11] selftests/x86/lam: Add io_uring " Kirill A. Shutemov
2022-08-15 4:18 ` [PATCHv6 11/11] selftests/x86/lam: Add inherit " Kirill A. Shutemov
2022-08-15 13:43 ` [PATCHv6 00/11] Linear Address Masking enabling Peter Zijlstra
2022-08-23 8:58 ` Alexander Potapenko
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