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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-20 11:13:58 +08:00
linux-next/Documentation/admin-guide/hw-vuln
Pawan Gupta f29dfa53cc x86/bugs/multihit: Fix mitigation reporting when VMX is not in use
On systems that have virtualization disabled or unsupported, sysfs
mitigation for X86_BUG_ITLB_MULTIHIT is reported incorrectly as:

  $ cat /sys/devices/system/cpu/vulnerabilities/itlb_multihit
  KVM: Vulnerable

System is not vulnerable to DoS attack from a rogue guest when
virtualization is disabled or unsupported in the hardware. Change the
mitigation reporting for these cases.

Fixes: b8e8c8303f ("kvm: mmu: ITLB_MULTIHIT mitigation")
Reported-by: Nelson Dsouza <nelson.dsouza@linux.intel.com>
Co-developed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/0ba029932a816179b9d14a30db38f0f11ef1f166.1594925782.git.pawan.kumar.gupta@linux.intel.com
2020-08-07 01:32:00 +02:00
..
index.rst x86/speculation: Add SRBDS vulnerability and mitigation documentation 2020-04-20 12:19:22 +02:00
l1tf.rst docs: add IRQ documentation at the core-api book 2020-05-15 12:00:56 -06:00
mds.rst x86/speculation: Fix incorrect MDS/TAA mitigation status 2019-11-16 13:17:49 +01:00
multihit.rst x86/bugs/multihit: Fix mitigation reporting when VMX is not in use 2020-08-07 01:32:00 +02:00
special-register-buffer-data-sampling.rst doc: x86/speculation: length of underlines 2020-06-19 13:17:25 -06:00
spectre.rst Documentation: Add swapgs description to the Spectre v1 documentation 2019-08-03 21:21:54 +02:00
tsx_async_abort.rst docs: hw-vuln: tsx_async_abort.rst: get rid of an unused ref 2020-03-10 11:56:48 -06:00