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* x86/mm: Add support to access boot related data in the clearTom Lendacky2017-07-185-7/+218
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Boot data (such as EFI related data) is not encrypted when the system is booted because UEFI/BIOS does not run with SME active. In order to access this data properly it needs to be mapped decrypted. Update early_memremap() to provide an arch specific routine to modify the pagetable protection attributes before they are applied to the new mapping. This is used to remove the encryption mask for boot related data. Update memremap() to provide an arch specific routine to determine if RAM remapping is allowed. RAM remapping will cause an encrypted mapping to be generated. By preventing RAM remapping, ioremap_cache() will be used instead, which will provide a decrypted mapping of the boot related data. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/81fb6b4117a5df6b9f2eda342f81bbef4b23d2e5.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/efi: Update EFI pagetable creation to work with SMETom Lendacky2017-07-181-4/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When SME is active, pagetable entries created for EFI need to have the encryption mask set as necessary. When the new pagetable pages are allocated they are mapped encrypted. So, update the efi_pgt value that will be used in CR3 to include the encryption mask so that the PGD table can be read successfully. The pagetable mapping as well as the kernel are also added to the pagetable mapping as encrypted. All other EFI mappings are mapped decrypted (tables, etc.). Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/9a8f4c502db4a84b09e2f0a1555bb75aa8b69785.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* efi: Update efi_mem_type() to return an error rather than 0Tom Lendacky2017-07-183-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The efi_mem_type() function currently returns a 0, which maps to EFI_RESERVED_TYPE, if the function is unable to find a memmap entry for the supplied physical address. Returning EFI_RESERVED_TYPE implies that a memmap entry exists, when it doesn't. Instead of returning 0, change the function to return a negative error value when no memmap entry is found. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/7fbf40a9dc414d5da849e1ddcd7f7c1285e4e181.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* efi: Add an EFI table address match functionTom Lendacky2017-07-182-0/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a function that will determine if a supplied physical address matches the address of an EFI table. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/e1e06441d80f44776df391e0e4cb485b345b7518.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/boot/e820: Add support to determine the E820 type of an addressTom Lendacky2017-07-182-3/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a function that will return the E820 type associated with an address range. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/b797aaa588803bf33263d5dd8c32377668fa931a.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/mm: Insure that boot memory areas are mapped properlyTom Lendacky2017-07-186-5/+108
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The boot data and command line data are present in memory in a decrypted state and are copied early in the boot process. The early page fault support will map these areas as encrypted, so before attempting to copy them, add decrypted mappings so the data is accessed properly when copied. For the initrd, encrypt this data in place. Since the future mapping of the initrd area will be mapped as encrypted the data will be accessed properly. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/bb0d430b41efefd45ee515aaf0979dcfda8b6a44.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/mm: Add support for early encryption/decryption of memoryTom Lendacky2017-07-182-0/+86
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support to be able to either encrypt or decrypt data in place during the early stages of booting the kernel. This does not change the memory encryption attribute - it is used for ensuring that data present in either an encrypted or decrypted memory area is in the proper state (for example the initrd will have been loaded by the boot loader and will not be encrypted, but the memory that it resides in is marked as encrypted). Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/f9968e9432cd6c4b57ef245729be04ff18852225.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/mm: Extend early_memremap() support with additional attrsTom Lendacky2017-07-186-0/+81
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add early_memremap() support to be able to specify encrypted and decrypted mappings with and without write-protection. The use of write-protection is necessary when encrypting data "in place". The write-protect attribute is considered cacheable for loads, but not stores. This implies that the hardware will never give the core a dirty line with this memtype. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/479b5832c30fae3efa7932e48f81794e86397229.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/mm: Add SME support for read_cr3_pa()Tom Lendacky2017-07-182-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The CR3 register entry can contain the SME encryption mask that indicates the PGD is encrypted. The encryption mask should not be used when creating a virtual address from the CR3 register, so remove the SME encryption mask in the read_cr3_pa() function. During early boot SME will need to use a native version of read_cr3_pa(), so create native_read_cr3_pa(). Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/767b085c384a46f67f451f8589903a462c7ff68a.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/mm: Provide general kernel support for memory encryptionTom Lendacky2017-07-1816-35/+133
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes to the existing page table macros will allow the SME support to be enabled in a simple fashion with minimal changes to files that use these macros. Since the memory encryption mask will now be part of the regular pagetable macros, we introduce two new macros (_PAGE_TABLE_NOENC and _KERNPG_TABLE_NOENC) to allow for early pagetable creation/initialization without the encryption mask before SME becomes active. Two new pgprot() macros are defined to allow setting or clearing the page encryption mask. The FIXMAP_PAGE_NOCACHE define is introduced for use with MMIO. SME does not support encryption for MMIO areas so this define removes the encryption mask from the page attribute. Two new macros are introduced (__sme_pa() / __sme_pa_nodebug()) to allow creating a physical address with the encryption mask. These are used when working with the cr3 register so that the PGD can be encrypted. The current __va() macro is updated so that the virtual address is generated based off of the physical address without the encryption mask thus allowing the same virtual address to be generated regardless of whether encryption is enabled for that physical location or not. Also, an early initialization function is added for SME. If SME is active, this function: - Updates the early_pmd_flags so that early page faults create mappings with the encryption mask. - Updates the __supported_pte_mask to include the encryption mask. - Updates the protection_map entries to include the encryption mask so that user-space allocations will automatically have the encryption mask applied. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/b36e952c4c39767ae7f0a41cf5345adf27438480.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/mm: Simplify p[g4um]d_page() macrosTom Lendacky2017-07-181-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Create a pgd_pfn() macro similar to the p[4um]d_pfn() macros and then use the p[g4um]d_pfn() macros in the p[g4um]d_page() macros instead of duplicating the code. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/e61eb533a6d0aac941db2723d8aa63ef6b882dee.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/mm: Add support to enable SME in early boot processingTom Lendacky2017-07-185-13/+82
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support to the early boot code to use Secure Memory Encryption (SME). Since the kernel has been loaded into memory in a decrypted state, encrypt the kernel in place and update the early pagetables with the memory encryption mask so that new pagetable entries will use memory encryption. The routines to set the encryption mask and perform the encryption are stub routines for now with functionality to be added in a later patch. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/e52ad781f085224bf835b3caff9aa3aee6febccb.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/mm: Remove phys_to_virt() usage in ioremap()Tom Lendacky2017-07-181-10/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently there is a check if the address being mapped is in the ISA range (is_ISA_range()), and if it is, then phys_to_virt() is used to perform the mapping. When SME is active, the default is to add pagetable mappings with the encryption bit set unless specifically overridden. The resulting pagetable mapping from phys_to_virt() will result in a mapping that has the encryption bit set. With SME, the use of ioremap() is intended to generate pagetable mappings that do not have the encryption bit set through the use of the PAGE_KERNEL_IO protection value. Rather than special case the SME scenario, remove the ISA range check and usage of phys_to_virt() and have ISA range mappings continue through the remaining ioremap() path. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/88ada7b09c6568c61cd696351eb59fb15a82ce1a.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/mm: Add Secure Memory Encryption (SME) supportTom Lendacky2017-07-185-0/+112
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for Secure Memory Encryption (SME). This initial support provides a Kconfig entry to build the SME support into the kernel and defines the memory encryption mask that will be used in subsequent patches to mark pages as encrypted. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/a6c34d16caaed3bc3e2d6f0987554275bd291554.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/cpu/AMD: Handle SME reduction in physical address sizeTom Lendacky2017-07-181-11/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When System Memory Encryption (SME) is enabled, the physical address space is reduced. Adjust the x86_phys_bits value to reflect this reduction. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/593c037a3cad85ba92f3d061ffa7462e9ce3531d.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/cpu/AMD: Add the Secure Memory Encryption CPU featureTom Lendacky2017-07-184-0/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update the CPU features to include identifying and reporting on the Secure Memory Encryption (SME) feature. SME is identified by CPUID 0x8000001f, but requires BIOS support to enable it (set bit 23 of MSR_K8_SYSCFG). Only show the SME feature as available if reported by CPUID, enabled by BIOS and not configured as CONFIG_X86_32=y. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/85c17ff450721abccddc95e611ae8df3f4d9718b.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86, mpparse, x86/acpi, x86/PCI, x86/dmi, SFI: Use memremap() for RAM mappingsTom Lendacky2017-07-189-66/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ioremap() function is intended for mapping MMIO. For RAM, the memremap() function should be used. Convert calls from ioremap() to memremap() when re-mapping RAM. This will be used later by SME to control how the encryption mask is applied to memory mappings, with certain memory locations being mapped decrypted vs encrypted. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/b13fccb9abbd547a7eef7b1fdfc223431b211c88.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/mm/pat: Set write-protect cache mode for full PAT supportTom Lendacky2017-07-181-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For processors that support PAT, set the write-protect cache mode (_PAGE_CACHE_MODE_WP) entry to the actual write-protect value (x05). Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/ade53b63d4dbffbfc3cb08fb62024647059c8688.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/cpu/AMD: Document AMD Secure Memory Encryption (SME)Tom Lendacky2017-07-182-0/+79
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Create a Documentation entry to describe the AMD Secure Memory Encryption (SME) feature and add documentation for the mem_encrypt= kernel parameter. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/ca0a0c13b055fd804cfc92cbaca8acd68057eed0.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Merge branch 'x86/boot' into x86/mm, to pick up interacting changesIngo Molnar2017-07-189101-212455/+801021
|\ | | | | | | | | | | | | The SME patches we are about to apply add some E820 logic, so merge in pending E820 code changes first, to have a single code base. Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * x86/boot/KASLR: Rename process_e820_entry() into process_mem_region()Baoquan He2017-07-181-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now process_e820_entry() is not limited to e820 entry processing, rename it to process_mem_region(). And adjust the code comment accordingly. Signed-off-by: Baoquan He <bhe@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: fanc.fnst@cn.fujitsu.com Cc: izumi.taku@jp.fujitsu.com Cc: matt@codeblueprint.co.uk Cc: thgarnie@google.com Link: http://lkml.kernel.org/r/1499603862-11516-4-git-send-email-bhe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * x86/boot/KASLR: Switch to pass struct mem_vector to process_e820_entry()Baoquan He2017-07-181-11/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This makes process_e820_entry() be able to process any kind of memory region. Signed-off-by: Baoquan He <bhe@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: fanc.fnst@cn.fujitsu.com Cc: izumi.taku@jp.fujitsu.com Cc: matt@codeblueprint.co.uk Cc: thgarnie@google.com Link: http://lkml.kernel.org/r/1499603862-11516-3-git-send-email-bhe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * x86/boot/KASLR: Wrap e820 entries walking code into new function ↵Baoquan He2017-07-181-17/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | process_e820_entries() The original function process_e820_entry() only takes care of each e820 entry passed. And move the E820_TYPE_RAM checking logic into process_e820_entries(). And remove the redundent local variable 'addr' definition in find_random_phys_addr(). Signed-off-by: Baoquan He <bhe@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: fanc.fnst@cn.fujitsu.com Cc: izumi.taku@jp.fujitsu.com Cc: matt@codeblueprint.co.uk Cc: thgarnie@google.com Link: http://lkml.kernel.org/r/1499603862-11516-2-git-send-email-bhe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
| * Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparcLinus Torvalds2017-07-175-75/+139
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull sparc fixes from David Miller: - Fix DMA regression in 4.13 merge window, only certain chips can do 64-bit DMA. From Dave Dushar. - Correct cpu cross-call algorithm to correctly detect stalled or stuck remote cpus, from Jane Chu. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc64: Measure receiver forward progress to avoid send mondo timeout SPARC64: Fix sun4v DMA panic
| | * sparc64: Measure receiver forward progress to avoid send mondo timeoutJane Chu2017-07-144-70/+132
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A large sun4v SPARC system may have moments of intensive xcall activities, usually caused by unmapping many pages on many CPUs concurrently. This can flood receivers with CPU mondo interrupts for an extended period, causing some unlucky senders to hit send-mondo timeout. This problem gets worse as cpu count increases because sometimes mappings must be invalidated on all CPUs, and sometimes all CPUs may gang up on a single CPU. But a busy system is not a broken system. In the above scenario, as long as the receiver is making forward progress processing mondo interrupts, the sender should continue to retry. This patch implements the receiver's forward progress meter by introducing a per cpu counter 'cpu_mondo_counter[cpu]' where 'cpu' is in the range of 0..NR_CPUS. The receiver increments its counter as soon as it receives a mondo and the sender tracks the receiver's counter. If the receiver has stopped making forward progress when the retry limit is reached, the sender declares send-mondo-timeout and panic; otherwise, the receiver is allowed to keep making forward progress. In addition, it's been observed that PCIe hotplug events generate Correctable Errors that are handled by hypervisor and then OS. Hypervisor 'borrows' a guest cpu strand briefly to provide the service. If the cpu strand is simultaneously the only cpu targeted by a mondo, it may not be available for the mondo in 20msec, causing SUN4V mondo timeout. It appears that 1 second is the agreed wait time between hypervisor and guest OS, this patch makes the adjustment. Orabug: 25476541 Orabug: 26417466 Signed-off-by: Jane Chu <jane.chu@oracle.com> Reviewed-by: Steve Sistare <steven.sistare@oracle.com> Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com> Reviewed-by: Rob Gardner <rob.gardner@oracle.com> Reviewed-by: Thomas Tai <thomas.tai@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| | * SPARC64: Fix sun4v DMA panicTushar Dave2017-07-121-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 64bit DMA only supported on sun4v equipped with ATU IOMMU HW. 'Commit b02c2b0bfd7ae ("sparc: remove arch specific dma_supported implementations")' introduced a code that incorrectly allow dma_supported() to succeed for 64bit dma mask even if system doesn't have ATU IOMMU. This results into panic. Fix it. Reported-by: Meelis Roos <mroos@linux.ee> Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds2017-07-171-10/+53
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fix from Thomas Gleixner: "Fix the fallout from reworking the locking and resource management in request/free_irq()" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq: Keep chip buslock across irq_request/release_resources()
| | * | genirq: Keep chip buslock across irq_request/release_resources()Thomas Gleixner2017-07-121-10/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Moving the irq_request/release_resources() callbacks out of the spinlocked, irq disabled and bus locked region, unearthed an interesting abuse of the irq_bus_lock/irq_bus_sync_unlock() callbacks. The OMAP GPIO driver does merily power management inside of them. The irq_request_resources() callback of this GPIO irqchip calls a function which reads a GPIO register. That read aborts now because the clock of the GPIO block is not magically enabled via the irq_bus_lock() callback. Move the callbacks under the bus lock again to prevent this. In the free_irq() path this requires to drop the bus_lock before calling synchronize_irq() and reaquiring it before calling the irq_release_resources() callback. The bus lock can't be held because: 1) The data which has been changed between bus_lock/un_lock is cached in the irq chip driver private data and needs to go out to the irq chip via the slow bus (usually SPI or I2C) before calling synchronize_irq(). That's the reason why this bus_lock/unlock magic exists in the first place, as you cannot do SPI/I2C transactions while holding desc->lock with interrupts disabled. 2) synchronize_irq() will actually deadlock, if there is a handler on flight. These chips use threaded handlers for obvious reasons, as they allow to do SPI/I2C communication. When the threaded handler returns then bus_lock needs to be taken in irq_finalize_oneshot() as we need to talk to the actual irq chip once more. After that the threaded handler is marked done, which makes synchronize_irq() return. So if we hold bus_lock accross the synchronize_irq() call, the handler cannot mark itself done because it blocks on the bus lock. That in turn makes synchronize_irq() wait forever on the threaded handler to complete.... Add the missing unlock of desc->request_mutex in the error path of __free_irq() and add a bunch of comments to explain the locking and protection rules. Fixes: 46e48e257360 ("genirq: Move irq resource handling out of spinlocked region") Reported-and-tested-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Reported-and-tested-by: Tony Lindgren <tony@atomide.com> Reported-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Not-longer-ranted-at-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Grygorii Strashko <grygorii.strashko@ti.com> Cc: Marc Zyngier <marc.zyngier@arm.com>
| * | | Merge branch 'smp-urgent-for-linus' of ↵Linus Torvalds2017-07-171-1/+2
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull SMP fix from Thomas Gleixner: "Replace the bogus BUG_ON in the cpu hotplug code" * 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: smp/hotplug: Replace BUG_ON and react useful
| | * | | smp/hotplug: Replace BUG_ON and react usefulThomas Gleixner2017-07-111-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The move of the unpark functions to the control thread moved the BUG_ON() there as well. While it made some sense in the idle thread of the upcoming CPU, it's bogus to crash the control thread on the already online CPU, especially as the function has a return value and the callsite is prepared to handle an error return. Replace it with a WARN_ON_ONCE() and return a proper error code. Fixes: 9cd4f1a4e7a8 ("smp/hotplug: Move unparking of percpu threads to the control CPU") Rightfully-ranted-at-by: Linux Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * | | | Merge tag 'regmap-fix-w1-merge-window' of ↵Linus Torvalds2017-07-171-2/+2
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap Pull regmap fix from Mark Brown: "Fix build due to w1 header refactoring The regmap support for w1 was added shortly before a reorganization of the w1 headers. While this was noticed before the merge window and efforts made to get it resolved in what was sent that managed to fall through the cracks, this cleans up and updates things so we look for the header in the new location. It didn't cause build failures as the driver that's going to be the first user got held up with other review issues" * tag 'regmap-fix-w1-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: regmap-w1: Fix build troubles
| | * | | | regmap: regmap-w1: Fix build troublesminimumlaw@rambler.ru2017-07-171-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes: cc5d0db390b0 ("regmap: Add 1-Wire bus support") Commit de0d6dbdbdb2 ("w1: Add subsystem kernel public interface") Fix place off w1.h header file Cosmetic: Fix company name (local to international) Signed-off-by: Alex A. Mihaylov <minimumlaw@rambler.ru> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | | | | Merge tag 'scsi-fixes' of ↵Linus Torvalds2017-07-1712-21/+674
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "This is actually just a small set of mainly bug fixes for the original merge window code plus a few trivial updates and qedi boot from SAN support feature patch" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: libfc: pass an error pointer to fc_disc_error() scsi: hisi_sas: make several const arrays static scsi: qla2xxx: Off by one in qlt_ctio_to_cmd() scsi: sg: fix SG_DXFER_FROM_DEV transfers scsi: virtio_scsi: always read VPD pages for multiqueue too scsi: qedf: fix spelling mistake: "offlading" -> "offloading" scsi: qedi: fix another spelling mistake: "alloction" -> "allocation" scsi: isci: fix typo in function names scsi: cxlflash: return -EFAULT if copy_from_user() fails scsi: qedi: Add support for Boot from SAN over iSCSI offload
| | * | | | | scsi: libfc: pass an error pointer to fc_disc_error()Dan Carpenter2017-07-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is basically to silence a static checker warning. drivers/scsi/libfc/fc_disc.c:326 fc_disc_error() warn: passing a valid pointer to 'PTR_ERR' It doesn't affect runtime because it treats -ENOMEM and a valid pointer the same. But the documentation says we should be passing an error pointer. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Johannes Thumshirn <jth@kernel.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| | * | | | | scsi: hisi_sas: make several const arrays staticColin Ian King2017-07-121-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't populate various tables on the stack but make them static const. Makes the object code smaller by over 280 bytes: Before: text data bss dec hex filename 39887 5080 64 45031 afe7 hisi_sas_v2_hw.o After: text data bss dec hex filename 39318 5368 64 44750 aece hisi_sas_v2_hw.o Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| | * | | | | scsi: qla2xxx: Off by one in qlt_ctio_to_cmd()Dan Carpenter2017-07-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are "req->num_outstanding_cmds" elements in the req->outstanding_cmds[] array so the > here should be >=. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| | * | | | | scsi: sg: fix SG_DXFER_FROM_DEV transfersJohannes Thumshirn2017-07-121-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SG_DXFER_FROM_DEV transfers do not necessarily have a dxferp as we set it to NULL for the old sg_io read/write interface, but must have a length bigger than 0. This fixes a regression introduced by commit 28676d869bbb ("scsi: sg: check for valid direction before starting the request") Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Fixes: 28676d869bbb ("scsi: sg: check for valid direction before starting the request") Reported-by: Chris Clayton <chris2553@googlemail.com> Tested-by: Chris Clayton <chris2553@googlemail.com> Cc: Douglas Gilbert <dgilbert@interlog.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: Chris Clayton <chris2553@googlemail.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| | * | | | | scsi: virtio_scsi: always read VPD pages for multiqueue tooPaolo Bonzini2017-07-121-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Multi-queue virtio-scsi uses a different scsi_host_template struct. Add the .device_alloc field there, too. Fixes: 25d1d50e23275e141e3a3fe06c25a99f4c4bf4e0 Cc: stable@vger.kernel.org Cc: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| | * | | | | scsi: qedf: fix spelling mistake: "offlading" -> "offloading"Colin Ian King2017-07-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Trivial fix to spelling mistake in QEDF_INFO message and remove duplicated "since" (thanks to Tyrel Datwyler for spotting the latter issue). Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Chad Dupuis <chad.dupuis@cavium.com> Reviewed-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| | * | | | | scsi: qedi: fix another spelling mistake: "alloction" -> "allocation"Colin Ian King2017-07-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Trivial fix to spelling mistake in QEDF_ERR message. I should have also included this in a previous fix, but I only just spotted this one. Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Manish Rangankar <Manish.Rangankar@cavium.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| | * | | | | scsi: isci: fix typo in function namesColin Ian King2017-07-121-7/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are a couple of typos in function names and spelling of request where the letters u and e are swapped: scu_ssp_reqeust_construct_task_context scu_sata_reqeust_construct_task_context Fix the spelling of request. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| | * | | | | scsi: cxlflash: return -EFAULT if copy_from_user() failsDan Carpenter2017-07-121-4/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The copy_from/to_user() functions return the number of bytes remaining to be copied but we had intended to return -EFAULT here. Fixes: bc88ac47d5cb ("scsi: cxlflash: Support AFU debug") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| | * | | | | scsi: qedi: Add support for Boot from SAN over iSCSI offloadNilesh Javali2017-07-123-0/+646
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for Boot from SAN over iSCSI offload. The iSCSI boot information in the NVRAM is populated under /sys/firmware/iscsi_bootX/ using qed NVM-image reading API and further exported to open-iscsi to perform iSCSI login enabling boot over offload iSCSI interface in a Boot from SAN environment. Signed-off-by: Arun Easi <arun.easi@cavium.com> Signed-off-by: Andrew Vasquez <andrew.vasquez@cavium.com> Signed-off-by: Manish Rangankar <manish.rangankar@cavium.com> Signed-off-by: Nilesh Javali <nilesh.javali@cavium.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * | | | | | Blackfin: flat: Use %x to format u32Geert Uytterhoeven2017-07-171-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several variables had their types changed from unsigned long to u32, but the printk()-style format to print them wasn't updated, leading to: arch/blackfin/kernel/flat.c: In function 'bfin_get_addr_from_rp': arch/blackfin/kernel/flat.c:35:3: warning: format '%lx' expects argument of type 'long unsigned int', but argument 2 has type 'u32' [-Wformat] arch/blackfin/kernel/flat.c: In function 'bfin_put_addr_at_rp': arch/blackfin/kernel/flat.c:80:3: warning: format '%lx' expects argument of type 'long unsigned int', but argument 2 has type 'u32' [-Wformat] Fixes: 468138d78510688f ("binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | | h8300: Add missing closing parenthesis in flat_get_addr_from_rp()Geert Uytterhoeven2017-07-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In file included from include/linux/flat.h:13:0, from fs/binfmt_flat.c:36: arch/h8300/include/asm/flat.h: In function 'flat_get_addr_from_rp': arch/h8300/include/asm/flat.h:28:3: error: expected ')' before 'val' val &= 0x00ffffff; ^ arch/h8300/include/asm/flat.h:31:1: error: expected expression before '}' token } ^ In file included from include/linux/flat.h:13:0, from fs/binfmt_flat.c:36: arch/h8300/include/asm/flat.h:26:6: warning: unused variable 'val' [-Wunused-variable] u32 val = get_unaligned((__force u32 *)rp); ^ In file included from include/linux/flat.h:13:0, from fs/binfmt_flat.c:36: arch/h8300/include/asm/flat.h:31:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ Reported-by: kbuild test robot <fengguang.wu@intel.com> Fixes: 468138d78510688f ("binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | | blackfin, m68k: Fix flat_set_persistent() for unsigned long to u32 changesGeert Uytterhoeven2017-07-162-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several variables had their types changed from unsigned long to u32, but the arch-specific implementations of flat_set_persistent() weren't updated, leading to compiler warnings on blackfin and m68k: fs/binfmt_flat.c: In function ‘load_flat_file’: fs/binfmt_flat.c:799: warning: passing argument 2 of ‘flat_set_persistent’ from incompatible pointer type Fixes: 468138d78510688f ("binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | | binfmt_flat: Use %u to format u32Geert Uytterhoeven2017-07-161-1/+1
| | |/ / / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Several variables had their types changed from unsigned long to u32, but the printk()-style format to print them wasn't updated, leading to: fs/binfmt_flat.c: In function ‘load_flat_file’: fs/binfmt_flat.c:577: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘u32’ Fixes: 468138d78510688f ("binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | Linux v4.13-rc1v4.13-rc1Linus Torvalds2017-07-151-2/+2
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| * | | | | Merge tag 'standardize-docs' of git://git.lwn.net/linuxLinus Torvalds2017-07-1581-4731/+6263
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull documentation format standardization from Jonathan Corbet: "This series converts a number of top-level documents to the RST format without incorporating them into the Sphinx tree. The hope is to bring some uniformity to kernel documentation and, perhaps more importantly, have our existing docs serve as an example of the desired formatting for those that will be added later. Mauro has gone through and fixed up a lot of top-level documentation files to make them conform to the RST format, but without moving or renaming them in any way. This will help when we incorporate the ones we want to keep into the Sphinx doctree, but the real purpose is to bring a bit of uniformity to our documentation and let the top-level docs serve as examples for those writing new ones" * tag 'standardize-docs' of git://git.lwn.net/linux: (84 commits) docs: kprobes.txt: Fix whitespacing tee.txt: standardize document format cgroup-v2.txt: standardize document format dell_rbu.txt: standardize document format zorro.txt: standardize document format xz.txt: standardize document format xillybus.txt: standardize document format vfio.txt: standardize document format vfio-mediated-device.txt: standardize document format unaligned-memory-access.txt: standardize document format this_cpu_ops.txt: standardize document format svga.txt: standardize document format static-keys.txt: standardize document format smsc_ece1099.txt: standardize document format SM501.txt: standardize document format siphash.txt: standardize document format sgi-ioc4.txt: standardize document format SAK.txt: standardize document format rpmsg.txt: standardize document format robust-futexes.txt: standardize document format ...
| | * | | | | docs: kprobes.txt: Fix whitespacingMauro Carvalho Chehab2017-07-141-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The notes at the end of this file start with a blank space, instead of a blank line, violating ReST format. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-14 06:49:05 +0000