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e5f3530c39
linux/arch/x86/kernel
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Reinette Chatre e5f3530c39 x86/intel_rdt: CBM overlap should also check for overlap with CDP peer 
The CBM overlap test is used to manage the allocations of RDT resources
where overlap is possible between resource groups. When a resource group
is in exclusive mode then there should be no overlap between resource
groups.

The current overlap test only considers overlap between the same
resources, for example, that usage of a RDT_RESOURCE_L2DATA resource
in one resource group does not overlap with usage of a RDT_RESOURCE_L2DATA
resource in another resource group. The problem with this is that it
allows overlap between a RDT_RESOURCE_L2DATA resource in one resource
group with a RDT_RESOURCE_L2CODE resource in another resource group -
even if both resource groups are in exclusive mode. This is a problem
because even though these appear to be different resources they end up
sharing the same underlying hardware and thus does not fulfill the
user's request for exclusive use of hardware resources.

Fix this by including the CDP peer (if there is one) in every CBM
overlap test. This does not impact the overlap between resources
within the same exclusive resource group that is allowed.

Fixes: 49f7b4efa1 ("x86/intel_rdt: Enable setting of exclusive mode")
Reported-by: Jithu Joseph <jithu.joseph@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Jithu Joseph <jithu.joseph@intel.com>
Acked-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: tony.luck@intel.com
Cc: gavin.hindman@intel.com
Cc: dave.hansen@intel.com
Cc: hpa@zytor.com
Link: https://lkml.kernel.org/r/e538b7f56f7ca15963dce2e00ac3be8edb8a68e1.1538603665.git.reinette.chatre@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-10-09 08:50:43 +02:00
..
acpi x86/ACPI/cstate: Make APCI C1 FFH MWAIT C-state description vendor-neutral 2018-08-15 00:19:38 +02:00
apic x86/apic/vector: Make error return value negative 2018-09-08 12:12:40 +02:00
cpu x86/intel_rdt: CBM overlap should also check for overlap with CDP peer 2018-10-09 08:50:43 +02:00
fpu x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
kprobes kprobes/x86: Fix %p uses in error messages 2018-06-21 17:33:42 +02:00
.gitignore
alternative.c x86/alternatives: Lockdep-enforce text_mutex in text_poke*() 2018-08-30 13:02:30 +02:00
amd_gart_64.c x86/dma/amd_gart: Use dma_direct_{alloc,free}() 2018-03-20 10:01:57 +01:00
amd_nb.c x86/amd_nb: Add support for Raven Ridge CPUs 2018-05-13 09:00:27 -07:00
apb_timer.c
aperture_64.c
apm_32.c x86/APM: Fix build warning when PROC_FS is not enabled 2018-09-15 10:16:25 +02:00
asm-offsets_32.c x86/entry/32: Load task stack from x86_tss.sp1 in SYSENTER handler 2018-07-20 01:11:36 +02:00
asm-offsets_64.c x86/asm-offsets: Move TSS_sp0 and TSS_sp1 to asm-offsets.c 2018-07-20 01:11:35 +02:00
asm-offsets.c x86/entry/32: Enter the kernel via trampoline stack 2018-07-20 01:11:37 +02:00
audit_64.c
bootflag.c
check.c
cpuid.c x86/cpuid: Allow cpuid_read() to schedule 2018-03-27 12:01:48 +02:00
crash_dump_32.c
crash_dump_64.c
crash.c kexec_file, x86: move re-factored code to generic side 2018-04-13 17:10:27 -07:00
devicetree.c Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-04-02 16:15:32 -07:00
doublefault.c
dumpstack_32.c
dumpstack_64.c
dumpstack.c x86/process: Don't mix user/kernel regs in 64bit __show_regs() 2018-09-06 14:33:12 +02:00
e820.c x86/e820: put !E820_TYPE_RAM regions into memblock.reserved 2018-06-28 11:16:44 -07:00
early_printk.c
early-quirks.c On GEM side: 2018-07-20 12:29:24 +10:00
ebda.c
eisa.c x86/EISA: Don't probe EISA bus for Xen PV guests 2018-09-11 23:36:50 +02:00
espfix_64.c x86/espfix: Document use of _PAGE_GLOBAL 2018-04-09 18:27:33 +02:00
ftrace_32.S
ftrace_64.S
ftrace.c
head32.c
head64.c x86/mm: Expand static page table for fixmap space 2018-09-20 23:17:22 +02:00
head_32.S x86/pgtable/32: Allocate 8k page-tables when PTI is enabled 2018-07-20 01:11:41 +02:00
head_64.S x86/mm: Expand static page table for fixmap space 2018-09-20 23:17:22 +02:00
hpet.c x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
hw_breakpoint.c perf/arch/x86: Implement hw_breakpoint_arch_parse() 2018-06-26 09:07:55 +02:00
i8237.c x86/i8237: Register device based on FADT legacy boot flag 2018-04-27 16:44:29 +02:00
i8253.c
i8259.c x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
idt.c x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
io_delay.c
ioport.c x86/ioport: add ksys_ioperm() helper; remove in-kernel calls to sys_ioperm() 2018-04-02 20:16:12 +02:00
irq_32.c x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
irq_64.c x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
irq_work.c
irq.c x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
irqflags.S x86/paravirt: Make native_save_fl() extern inline 2018-07-03 10:56:27 +02:00
irqinit.c x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
itmt.c
jailhouse.c x86: Convert x86_platform_ops to timespec64 2018-05-19 14:03:14 +02:00
jump_label.c x86/alternatives, jumplabel: Use text_poke_early() before mm_init() 2018-07-20 00:02:38 +02:00
kdebugfs.c
kexec-bzimage64.c Fix kexec forbidding kernels signed with keys in the secondary keyring to boot 2018-08-16 09:57:20 -07:00
kgdb.c
ksysfs.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
kvm.c x86/mm: Only use tlb_remove_table() for paravirt 2018-08-23 11:56:31 -07:00
kvmclock.c x86/kvm: Use __bss_decrypted attribute in shared variables 2018-09-15 20:48:46 +02:00
ldt.c x86/ldt: Enable LDT user-mapping for PAE 2018-07-20 01:11:48 +02:00
livepatch.c
machine_kexec_32.c x86/kexec: Allocate 8k PGDs for PTI 2018-07-30 13:53:48 +02:00
machine_kexec_64.c x86/mm: Stop pretending pgtable_l5_enabled is a variable 2018-05-19 11:56:57 +02:00
Makefile x86/paravirt: Make native_save_fl() extern inline 2018-07-03 10:56:27 +02:00
mmconf-fam10h_64.c
module.c
mpparse.c
msr.c
nmi_selftest.c
nmi.c
paravirt_patch_32.c
paravirt_patch_64.c x86/asm/64: Use 32-bit XOR to zero registers 2018-07-03 09:59:29 +02:00
paravirt-spinlocks.c
paravirt.c x86/paravirt: Fix some warning messages 2018-09-19 13:22:04 +02:00
pci-calgary_64.c x86/dma: Remove dma_alloc_coherent_gfp_flags() 2018-03-20 10:01:58 +01:00
pci-dma.c IOMMU Update for Linux v4.19 2018-08-24 13:10:38 -07:00
pci-iommu_table.c x86/iommu: Use NULL instead of 0 2018-08-02 14:33:19 +02:00
pci-swiotlb.c x86/dma: Use generic swiotlb_ops 2018-03-20 10:01:57 +01:00
pcspeaker.c x86/platform/pcspeaker: Use PTR_ERR_OR_ZERO() to fix ptr_ret.cocci warning 2018-07-24 09:46:42 +02:00
perf_regs.c perf/x86: Store user space frame-pointer value on a sample 2018-05-25 08:11:12 +02:00
platform-quirks.c x86/i8237: Register device based on FADT legacy boot flag 2018-04-27 16:44:29 +02:00
pmem.c
probe_roms.c
process_32.c x86/process: Don't mix user/kernel regs in 64bit __show_regs() 2018-09-06 14:33:12 +02:00
process_64.c x86/process: Don't mix user/kernel regs in 64bit __show_regs() 2018-09-06 14:33:12 +02:00
process.c x86/entry/32: Enter the kernel via trampoline stack 2018-07-20 01:11:37 +02:00
ptrace.c signal: Ensure every siginfo we send has all bits initialized 2018-04-25 10:40:51 -05:00
pvclock.c x86: Convert x86_platform_ops to timespec64 2018-05-19 14:03:14 +02:00
quirks.c x86/mce: Check for alternate indication of machine check recovery on Skylake 2018-06-07 22:22:12 +02:00
reboot_fixups_32.c
reboot.c
relocate_kernel_32.S
relocate_kernel_64.S
resource.c
rtc.c x86: Convert x86_platform_ops to timespec64 2018-05-19 14:03:14 +02:00
setup_percpu.c
setup.c pci-v4.19-changes 2018-08-16 09:21:54 -07:00
signal_compat.c signal: Add TRAP_UNK si_code for undiagnosted trap exceptions 2018-04-25 10:40:56 -05:00
signal.c rseq: Avoid infinite recursion when delivering SIGSEGV 2018-06-22 19:04:22 +02:00
smp.c x86/irq: Let interrupt handlers set kvm_cpu_l1tf_flush_l1d 2018-08-05 09:53:13 +02:00
smpboot.c Merge 4.18-rc7 into master to pick up the KVM dependcy 2018-08-05 16:39:29 +02:00
stacktrace.c x86/stacktrace: Do not fail for ORC with regs on stack 2018-06-21 16:34:56 +02:00
step.c
sys_x86_64.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
sysfb_efi.c
sysfb_simplefb.c
sysfb.c
tboot.c
tce_64.c
time.c x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
tls.c
tls.h
topology.c x86/xen: Disable CPU0 hotplug for Xen PV 2018-09-12 21:15:02 +02:00
trace_clock.c
tracepoint.c
traps.c Merge branch 'linus' into x86/urgent 2018-06-22 21:20:35 +02:00
tsc_msr.c x86/platform/intel-mid: Remove custom TSC calibration 2018-07-03 13:08:21 +02:00
tsc_sync.c
tsc.c x86/tsc: Fix UV TSC initialization 2018-10-02 21:29:16 +02:00
umip.c signal: Ensure every siginfo we send has all bits initialized 2018-04-25 10:40:51 -05:00
unwind_frame.c
unwind_guess.c
unwind_orc.c x86/unwind/orc: Detect the end of the stack 2018-06-21 16:34:56 +02:00
uprobes.c uprobes/x86: Remove incorrect WARN_ON() in uprobe_init_insn() 2018-06-21 17:11:02 +02:00
verify_cpu.S
vm86_32.c x86/entry: Rename update_sp0 to update_task_stack 2018-07-20 01:11:40 +02:00
vmlinux.lds.S x86/mm: Add .bss..decrypted section to hold shared variables 2018-09-15 20:48:45 +02:00
vsmp_64.c
x86_init.c x86/tsc: Make use of tsc_calibrate_cpu_early() 2018-07-20 00:02:44 +02:00