This series of patches is for enabling SSBD via the LS_CFG MSR for family 15h-17h. The first patch make it so that the information is correctly displayed on boot. The last patch is for further enablement for Xen switching SSBD on or off internally, or for further control of SSBD for guests via the VIRT_SPEC_CTRL.
Note: these should be applied after Jan's patch: x86/AMD: distinguish compute units from hyper-threads v1 -> v2: - changed some variable types - updated ssbd_amd_ls_cfg_set_nonsmt function - changed sbd_amd_ls_cfg_init to a presmp_initcall - deleted ssbd_amd_ls_cfg_set_init due to ^ and it happening later in the boot - various smaller cleanups Brian Woods (2): x86/spec-ctrl: add AMD SSBD LS_CFG in init print x86/spec-ctrl: add support for modifying SSBD VIA LS_CFG MSR xen/arch/x86/cpu/amd.c | 12 ++- xen/arch/x86/setup.c | 2 + xen/arch/x86/smpboot.c | 3 + xen/arch/x86/spec_ctrl.c | 202 +++++++++++++++++++++++++++++++++++++- xen/include/asm-x86/cpufeatures.h | 1 + xen/include/asm-x86/spec_ctrl.h | 5 + 6 files changed, 218 insertions(+), 7 deletions(-) -- 2.11.0 Brian Woods (2): x86/spec-ctrl: add AMD SSBD LS_CFG in init print x86/spec-ctrl: add support for modifying SSBD VIA LS_CFG MSR xen/arch/x86/cpu/amd.c | 12 +-- xen/arch/x86/smpboot.c | 3 + xen/arch/x86/spec_ctrl.c | 179 +++++++++++++++++++++++++++++++++++++- xen/include/asm-x86/cpufeatures.h | 1 + xen/include/asm-x86/spec_ctrl.h | 4 + 5 files changed, 192 insertions(+), 7 deletions(-) -- 2.11.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel