Andi Kleen
17dbca1193
x86/speculation/l1tf: Add sysfs reporting for l1tf ...
L1TF core kernel workarounds are cheap and normally always enabled, However
they still should be reported in sysfs if the system is vulnerable or
mitigated. Add the necessary CPU feature/bug bits.
- Extend the existing checks for Meltdowns to determine if the system is
vulnerable. All CPUs which are not vulnerable to Meltdown are also not
vulnerable to L1TF
- Check for 32bit non PAE and emit a warning as there is no practical way
for mitigation due to the limited physical address bits
- If the system has more than MAX_PA/2 physical memory the invert page
workarounds don't protect the system against the L1TF attack anymore,
because an inverted physical address will also point to valid
memory. Print a warning in this case and report that the system is
vulnerable.
Add a function which returns the PFN limit for the L1TF mitigation, which
will be used in follow up patches for sanity and range checks.
[ tglx: Renamed the CPU feature bit to L1TF_PTEINV ]
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Dave Hansen <dave.hansen@intel.com>
2018-06-20 19:10:00 +02:00
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
Merge branches 'pm-domains' and 'pm-tools'
2018-06-13 11:08:44 +02:00
Merge branch 'regmap-4.17' into regmap-4.18 for the merge window
2018-06-04 12:03:03 +01:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
Revert "base: arch_topology: fix section mismatch build warnings"
2018-03-15 14:36:20 +01:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
PM / core: fix deferred probe breaking suspend resume order
2018-04-24 12:18:25 +02:00
driver core: hold dev's parent lock when needed
2018-05-31 10:12:07 +02:00
drivers: base cacheinfo: Add support for ACPI based firmware tables
2018-05-17 17:28:09 +01:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
component: add debugfs support
2017-12-18 16:51:11 +01:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
Driver core changes for 4.18-rc1
2018-06-05 16:29:19 -07:00
x86/speculation/l1tf: Add sysfs reporting for l1tf
2018-06-20 19:10:00 +02:00
Additional power management updates for 4.18-rc1
2018-06-13 07:24:18 -07:00
drivers: base: Unified device connection lookup
2018-03-22 13:10:29 +01:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
device: Use overflow helpers for devm_kmalloc()
2018-06-05 12:16:51 -07:00
kernel: add ksys_unshare() helper; remove in-kernel calls to sys_unshare()
2018-04-02 20:16:06 +02:00
dma-coherent: clarify dma_mmap_from_dev_coherent documentation
2018-04-23 14:44:17 +02:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
dma-mapping: move dma configuration to bus infrastructure
2018-05-03 16:22:18 +02:00
driver-core: return EINVAL error instead of BUG_ON()
2018-05-25 18:18:45 +02:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
Merge 4.15-rc3 into driver-core-next
2017-12-11 08:50:05 +01:00
firmware_loader: move kconfig FW_LOADER entries to its own file
2018-05-14 16:43:10 +02:00
Driver core patches for 4.17-rc1
2018-04-04 19:41:45 -07:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
mm: memory_hotplug: use put_device() if device_register fail
2018-05-14 16:48:59 +02:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
mm/memory_hotplug: fix leftover use of struct page during hotplug
2018-05-25 18:12:11 -07:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
genirq/msi: Limit level-triggered MSI to platform devices
2018-05-13 15:58:59 +02:00
Power management updates for 4.18-rc1
2018-06-05 09:38:39 -07:00
device property: Get rid of union aliasing
2018-05-17 12:47:21 +02:00
base: soc: use put_device() instead of kfree()
2018-03-15 14:37:03 +01:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
driver core: Remove redundant license text
2017-12-07 18:36:44 +01:00
17dbca1193