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arm64 fixes for merge window fallout

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This small set of fixes addresses a few issues introduced during the
 merge window, including:
 
   - Fix typo in I-cache detection that was causing us to treat all
     I-caches as aliasing
   - Hook up memfd_create and getrandom syscalls for native and compat
   - Revert a temporary hack for defconfig builds in -next (the audit
     tree changes didn't make it in this merge window)
   - A couple of UEFI fixes for TEXT_OFFSET fuzzing and /memreserve/
   - A simple sparsemem fix for 48-bit physical addressing
   - Small defconfig updates to get autotesters working with X-gene
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "This small set of fixes addresses a few issues introduced during the
  merge window, including:

   - fix typo in I-cache detection that was causing us to treat all
     I-caches as aliasing
   - hook up memfd_create and getrandom syscalls for native and compat
   - revert a temporary hack for defconfig builds in -next (the audit
     tree changes didn't make it in this merge window)
   - a couple of UEFI fixes for TEXT_OFFSET fuzzing and /memreserve/
   - a simple sparsemem fix for 48-bit physical addressing
   - small defconfig updates to get autotesters working with X-gene"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  Revert "arm64: Do not invoke audit_syscall_* functions if !CONFIG_AUDIT_SYSCALL"
  arm64: mm: update max pa bits to 48
  arm64: ignore DT memreserve entries when booting in UEFI mode
  arm64: configs: Enable X-Gene SATA and ethernet in defconfig
  arm64: align randomized TEXT_OFFSET on 4 kB boundary
  asm-generic: add memfd_create system call to unistd.h
  arm64: compat: wire up memfd_create and getrandom syscalls for aarch32
  arm64: fix typo in I-cache policy detection
This commit is contained in:
Linus Torvalds 2014-08-22 09:08:20 -07:00
commit 26d189b82f
11 changed files with 24 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm64/Makefile
View File

@ -39,7 +39,7 @@ head-y := arch/arm64/kernel/head.o
# The byte offset of the kernel image in RAM from the start of RAM.
ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%04x0\n", int(65535 * rand())}')
TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
else
TEXT_OFFSET := 0x00080000
endif

3
arch/arm64/configs/defconfig
View File

@ -64,6 +64,8 @@ CONFIG_VIRTIO_BLK=y
CONFIG_BLK_DEV_SD=y
# CONFIG_SCSI_LOWLEVEL is not set
CONFIG_ATA=y
CONFIG_AHCI_XGENE=y
CONFIG_PHY_XGENE=y
CONFIG_PATA_PLATFORM=y
CONFIG_PATA_OF_PLATFORM=y
CONFIG_NETDEVICES=y
@ -71,6 +73,7 @@ CONFIG_TUN=y
CONFIG_VIRTIO_NET=y
CONFIG_SMC91X=y
CONFIG_SMSC911X=y
CONFIG_NET_XGENE=y
# CONFIG_WLAN is not set
CONFIG_INPUT_EVDEV=y
# CONFIG_SERIO_SERPORT is not set

2
arch/arm64/include/asm/sparsemem.h
View File

@ -17,7 +17,7 @@
#define __ASM_SPARSEMEM_H
#ifdef CONFIG_SPARSEMEM
#define MAX_PHYSMEM_BITS 40
#define MAX_PHYSMEM_BITS 48
#define SECTION_SIZE_BITS 30
#endif

2
arch/arm64/include/asm/unistd.h
View File

@ -41,7 +41,7 @@
#define __ARM_NR_compat_cacheflush (__ARM_NR_COMPAT_BASE+2)
#define __ARM_NR_compat_set_tls (__ARM_NR_COMPAT_BASE+5)
#define __NR_compat_syscalls 383
#define __NR_compat_syscalls 386
#endif
#define __ARCH_WANT_SYS_CLONE

5
arch/arm64/include/asm/unistd32.h
View File

@ -787,3 +787,8 @@ __SYSCALL(__NR_sched_setattr, sys_sched_setattr)
__SYSCALL(__NR_sched_getattr, sys_sched_getattr)
#define __NR_renameat2 382
__SYSCALL(__NR_renameat2, sys_renameat2)
/* 383 for seccomp */
#define __NR_getrandom 384
__SYSCALL(__NR_getrandom, sys_getrandom)
#define __NR_memfd_create 385
__SYSCALL(__NR_memfd_create, sys_memfd_create)

2
arch/arm64/kernel/cpuinfo.c
View File

@ -49,7 +49,7 @@ static void cpuinfo_detect_icache_policy(struct cpuinfo_arm64 *info)
if (l1ip != ICACHE_POLICY_PIPT)
set_bit(ICACHEF_ALIASING, &__icache_flags);
if (l1ip == ICACHE_POLICY_AIVIVT);
if (l1ip == ICACHE_POLICY_AIVIVT)
set_bit(ICACHEF_AIVIVT, &__icache_flags);
pr_info("Detected %s I-cache on CPU%d\n", icache_policy_str[l1ip], cpu);

2
arch/arm64/kernel/efi.c
View File

@ -188,6 +188,8 @@ static __init void reserve_regions(void)
if (uefi_debug)
pr_cont("\n");
}
set_bit(EFI_MEMMAP, &efi.flags);
}

8
arch/arm64/kernel/head.S
View File

@ -38,11 +38,11 @@
#define KERNEL_RAM_VADDR (PAGE_OFFSET + TEXT_OFFSET)
#if (TEXT_OFFSET & 0xf) != 0
#error TEXT_OFFSET must be at least 16B aligned
#elif (PAGE_OFFSET & 0xfffff) != 0
#if (TEXT_OFFSET & 0xfff) != 0
#error TEXT_OFFSET must be at least 4KB aligned
#elif (PAGE_OFFSET & 0x1fffff) != 0
#error PAGE_OFFSET must be at least 2MB aligned
#elif TEXT_OFFSET > 0xfffff
#elif TEXT_OFFSET > 0x1fffff
#error TEXT_OFFSET must be less than 2MB
#endif

4
arch/arm64/kernel/ptrace.c
View File

@ -1115,19 +1115,15 @@ asmlinkage int syscall_trace_enter(struct pt_regs *regs)
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_enter(regs, regs->syscallno);
#ifdef CONFIG_AUDITSYSCALL
audit_syscall_entry(syscall_get_arch(), regs->syscallno,
regs->orig_x0, regs->regs[1], regs->regs[2], regs->regs[3]);
#endif
return regs->syscallno;
}
asmlinkage void syscall_trace_exit(struct pt_regs *regs)
{
#ifdef CONFIG_AUDITSYSCALL
audit_syscall_exit(regs);
#endif
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_exit(regs, regs_return_value(regs));

4
arch/arm64/mm/init.c
View File

@ -32,6 +32,7 @@
#include <linux/of_fdt.h>
#include <linux/dma-mapping.h>
#include <linux/dma-contiguous.h>
#include <linux/efi.h>
#include <asm/fixmap.h>
#include <asm/sections.h>
@ -148,7 +149,8 @@ void __init arm64_memblock_init(void)
memblock_reserve(__virt_to_phys(initrd_start), initrd_end - initrd_start);
#endif
early_init_fdt_scan_reserved_mem();
if (!efi_enabled(EFI_MEMMAP))
early_init_fdt_scan_reserved_mem();
/* 4GB maximum for 32-bit only capable devices */
if (IS_ENABLED(CONFIG_ZONE_DMA))

4
include/uapi/asm-generic/unistd.h
View File

@ -703,9 +703,11 @@ __SYSCALL(__NR_renameat2, sys_renameat2)
__SYSCALL(__NR_seccomp, sys_seccomp)
#define __NR_getrandom 278
__SYSCALL(__NR_getrandom, sys_getrandom)
#define __NR_memfd_create 279
__SYSCALL(__NR_memfd_create, sys_memfd_create)
#undef __NR_syscalls
#define __NR_syscalls 279
#define __NR_syscalls 280
/*
* All syscalls below here should go away really,