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/openbmc/linux/Documentation/admin-guide/hw-vuln/
H A Dmds.rst1 MDS - Microarchitectural Data Sampling
23 Whether a processor is affected or not can be read out from the MDS
26 Not all processors are affected by all variants of MDS, but the mitigation
33 The following CVE entries are related to the MDS vulnerability:
60 Deeper technical information is available in the MDS specific x86
87 MDS system information
181 invoked explicit when the host MDS mitigation is enabled.
194 L1TF MDS VMX-L1FLUSH Host MDS MDS-State
255 for the MDS vulnerability, CPU buffer clearing on exit to
264 off Disables MDS mitigations completely.
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H A Dprocessor_mmio_stale_data.rst16 are similar to those used to mitigate Microarchitectural Data Sampling (MDS) or
131 enumerate MDS_NO (meaning they are affected by MDS) but that do
152 Like MDS, all variants of Processor MMIO Stale Data vulnerabilities have the
160 Kernel reuses the MDS function to invoke the buffer clearing:
164 On MDS affected CPUs, the kernel already invokes CPU buffer clear on
168 For CPUs not affected by MDS or TAA, mitigation is needed only for the attacker
177 Same mitigation as MDS when affected by MDS/TAA, otherwise no mitigation
188 Same mitigation as MDS when processor is also affected by MDS/TAA, otherwise
190 MDS/TAA, guest without MMIO access cannot extract secrets using Processor MMIO
H A Dtsx_async_abort.rst16 (bit 5) is 0 in the IA32_ARCH_CAPABILITIES MSR, the existing MDS mitigations
75 As for MDS, the attacker has no control over the memory addresses that can
165 systems which are MDS-affected and deploy MDS mitigation,
176 processors that are affected by both TAA and MDS, specifying just
191 not vulnerable to MDS, i.e., have MSR_IA32_ARCH_CAPABILITIES.MDS_NO=1
239 0 1 0 MDS and TAA mitigated via VERW
240 1 1 0 MDS fixed, TAA vulnerable if TSX enabled
243 1 X 1 MDS fixed, TAA can be mitigated by
H A Dspecial-register-buffer-data-sampling.rst6 SRBDS is a hardware vulnerability that allows MDS
15 to MDS attacks.
59 executed on another core or sibling thread using MDS techniques.
H A Dcore-scheduling.rst17 Threads of the same core. MDS and L1TF are examples of such attacks. The only
183 1. For MDS
185 Core scheduling cannot protect against MDS attacks between the siblings
199 For both MDS and L1TF, if the guest vCPU is configured to not trust each
H A Dreg-file-data-sampling.rst43 information using the VERW instruction. Like MDS, RFDS deploys the same
/openbmc/linux/Documentation/arch/x86/
H A Dtsx_async_abort.rst12 Intel processors similar to Microachitectural Data Sampling (MDS). In this
17 the same uarch data structures as in MDS, with same scope of exposure i.e.
29 b) Clear CPU buffers - similar to MDS, clearing the CPU buffers mitigates this
69 …0 0 0 HW default Yes Same as MDS Same as MDS
84 … 0 0 0 HW default Yes Same as MDS Same as MDS
87 … 0 1 1 Enabled Yes None Same as MDS
99 …0 0 0 HW default Yes Same as MDS Same as MDS
H A Dmds.rst1 Microarchitectural Data Sampling (MDS) mitigation
9 Microarchitectural Data Sampling (MDS) is a family of side channel attacks
52 needed for exploiting MDS requires:
182 and not by any other MDS variant. The other MDS variants cannot be
/openbmc/linux/Documentation/admin-guide/nfs/
H A Dpnfs-scsi-server.rst7 With pNFS SCSI layouts, the NFS server acts as Metadata Server (MDS) for pNFS,
15 addition to the MDS. As of now the file system needs to sit directly on the
16 exported LUN, striping or concatenation of LUNs on the MDS and clients
H A Dpnfs-block-server.rst6 case the NFS server acts as Metadata Server (MDS) for pNFS, which in addition
14 to the clients in addition to the MDS. As of now the file system needs to
16 volumes on the MDS and clients is not supported yet.
/openbmc/linux/arch/powerpc/platforms/85xx/
H A DKconfig65 bool "Freescale MPC8568 MDS / MPC8569 MDS / P1021 MDS"
71 This option enables support for the MPC8568 MDS, MPC8569 MDS and P1021 MDS boards
/openbmc/qemu/docs/system/
H A Dcpu-models-x86.rst.inc77 vulnerable to MDS variants*.)
168 Required to confirm the MDS (CVE-2018-12126, CVE-2018-12127,
180 to any of the MDS variants ([MFBDS] CVE-2018-12130, [MLPDS]
185 guest. Instead, the host kernel uses it to populate the MDS
208 Intel's `deep dive into MDS
/openbmc/linux/Documentation/filesystems/
H A Dceph.rst63 for internal usage by the MDS.
64 * They can not exceed 240 characters in size. This is because the MDS makes
204 After reconnect, file locks become stale because the MDS loses track
/openbmc/linux/arch/powerpc/boot/dts/fsl/
H A Dp1021mds.dts3 * P1021 MDS Device Tree Source
H A Dmpc8568mds.dts3 * MPC8568E MDS Device Tree Source
H A Dmpc8569mds.dts3 * MPC8569E MDS Device Tree Source
/openbmc/openbmc/meta-openembedded/meta-networking/recipes-daemons/opensaf/opensaf/
H A D0001-Fix-build-with-fno-common.patch66 /* EDA Default MDS timeout value */
/openbmc/linux/Documentation/admin-guide/
H A Dkernel-parameters.txt3084 Sampling (MDS) vulnerability.
3095 This parameter controls the MDS mitigation. The
3099 full,nosmt - Enable MDS mitigation and disable
3390 the same CPU buffers as affected by MDS and TAA.
3391 Therefore, similar to MDS and TAA, the mitigation
3404 On MDS or TAA affected machines,
3406 MDS or TAA mitigation as these vulnerabilities are
6132 Certain CPUs are vulnerable to an MDS-like
6678 not vulnerable to MDS, i.e., have
6695 Similar to Micro-architectural Data Sampling (MDS)
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/openbmc/linux/arch/powerpc/xmon/
H A Dppc-opc.c2487 #define MDS(op, xop, rc) (OP (op) | ((((unsigned long)(xop)) & 0xf) << 1) | ((rc) & 1)) macro
2488 #define MDS_MASK MDS (0x3f, 0xf, 1)
4648 {"rotld", MDS(30,8,0), MDSMB_MASK, PPC64, PPCVLE, {RA, RS, RB}},
4649 {"rldcl", MDS(30,8,0), MDS_MASK, PPC64, PPCVLE, {RA, RS, RB, MB6}},
4650 {"rotld.", MDS(30,8,1), MDSMB_MASK, PPC64, PPCVLE, {RA, RS, RB}},
4651 {"rldcl.", MDS(30,8,1), MDS_MASK, PPC64, PPCVLE, {RA, RS, RB, MB6}},
4653 {"rldcr", MDS(30,9,0), MDS_MASK, PPC64, PPCVLE, {RA, RS, RB, ME6}},
4654 {"rldcr.", MDS(30,9,1), MDS_MASK, PPC64, PPCVLE, {RA, RS, RB, ME6}},