linux/arch/arm64
Ard Biesheuvel adb4907007 arm64: fix invalidation of wrong __early_cpu_boot_status cacheline
In head.S, the str_l macro, which takes a source register, a symbol name
and a temp register, is used to store a status value to the variable
__early_cpu_boot_status. Subsequently, the value of the temp register is
reused to invalidate any cachelines covering this variable.

However, since str_l resolves to

      adrp    \tmp, \sym
      str     \src, [\tmp, :lo12:\sym]

the temp register never actually holds the address of the variable but
only of the 4 KB window that covers it, and reusing it leads to the
wrong cacheline being invalidated. So instead, take the address
explicitly before doing the store, and reuse that value to perform
the cache invalidation.

Fixes: bb9052744f ("arm64: Handle early CPU boot failures")
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2016-04-18 16:23:24 +01:00
..
boot arm64: dts: vulcan: Update PCI ranges 2016-03-30 00:26:16 +02:00
configs arm64: defconfig: updates for 4.6 2016-03-29 16:56:00 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-03-17 11:22:54 -07:00
include KVM/ARM Fixes for v4.6-rc4 2016-04-08 14:17:27 +02:00
kernel arm64: fix invalidation of wrong __early_cpu_boot_status cacheline 2016-04-18 16:23:24 +01:00
kvm arm64: KVM: Warn when PARange is less than 40 bits 2016-04-06 13:33:14 +02:00
lib arm64 updates for 4.6: 2016-03-17 20:03:47 -07:00
mm 2nd set of arm64 updates for 4.6: 2016-03-24 19:13:59 -07:00
net arm64: bpf: add extra pass to handle faulty codegen 2016-01-17 19:15:26 -05:00
xen xen/arm: introduce HYPERVISOR_platform_op on arm and arm64 2015-12-21 14:40:56 +00:00
Kconfig arm64 updates for 4.6: 2016-03-17 20:03:47 -07:00
Kconfig.debug arm64: enable CONFIG_DEBUG_RODATA by default 2016-03-03 18:14:17 +00:00
Kconfig.platforms Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-24 10:29:44 -07:00
Makefile arm64 updates for 4.6: 2016-03-17 20:03:47 -07:00