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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>,
	Bharata B Rao <bharata@amd.com>,
	Jacob Pan <jacob.jun.pan@linux.intel.com>,
	Ashok Raj <ashok.raj@intel.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCHv9 01/14] x86/mm: Fix CR3_ADDR_MASK
Date: Fri, 30 Sep 2022 17:47:45 +0300	[thread overview]
Message-ID: <20220930144758.30232-2-kirill.shutemov@linux.intel.com> (raw)
In-Reply-To: <20220930144758.30232-1-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>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 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


  reply	other threads:[~2022-09-30 14:48 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-30 14:47 [PATCHv9 00/14] Linear Address Masking enabling Kirill A. Shutemov
2022-09-30 14:47 ` Kirill A. Shutemov [this message]
2022-09-30 14:47 ` [PATCHv9 02/14] x86: CPUID and CR3/CR4 flags for Linear Address Masking Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 03/14] mm: Pass down mm_struct to untagged_addr() Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 04/14] x86/mm: Handle LAM on context switch Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 05/14] x86/uaccess: Provide untagged_addr() and remove tags before address check Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 06/14] KVM: Serialize tagged address check against tagging enabling Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 07/14] x86/mm: Provide arch_prctl() interface for LAM Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 08/14] x86/mm: Reduce untagged_addr() overhead until the first LAM user Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 09/14] x86: Expose untagging mask in /proc/$PID/arch_status Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 10/14] x86/mm, iommu/sva: Make LAM and SVM mutually exclusive Kirill A. Shutemov
2022-10-10 21:24   ` Jacob Pan
2022-09-30 14:47 ` [PATCHv9 11/14] selftests/x86/lam: Add malloc and tag-bits test cases for linear-address masking Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 12/14] selftests/x86/lam: Add mmap and SYSCALL " Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 13/14] selftests/x86/lam: Add io_uring " Kirill A. Shutemov
2022-09-30 14:47 ` [PATCHv9 14/14] selftests/x86/lam: Add inherit " Kirill A. Shutemov
2022-10-06 13:58 ` [PATCHv9 00/14] Linear Address Masking enabling Alexander Potapenko
2022-10-06 16:41   ` Kirill A. Shutemov

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