This is a note to let you know that I've just added the patch titled
x86/intel_rdt: Initialize bitmask of shareable resource if CDP enabled
to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: x86-intel_rdt-initialize-bitmask-of-shareable-resource-if-cdp-enabled.patch and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Wed Dec 6 18:04:41 CET 2017
From: Reinette Chatre reinette.chatre@intel.com Date: Fri, 20 Oct 2017 02:16:57 -0700 Subject: x86/intel_rdt: Initialize bitmask of shareable resource if CDP enabled
From: Reinette Chatre reinette.chatre@intel.com
[ Upstream commit 95953034fb24c16ad0047a98b16427e5935830c4 ]
The platform informs via CPUID.(EAX=0x10, ECX=res#):EBX[31:0] (valid res# are only 1 for L3 and 2 for L2) which unit of the allocation may be used by other entities in the platform. This information is valid whether CDP (Code and Data Prioritization) is enabled or not.
Ensure that the bitmask of shareable resource is initialized when CDP is enabled.
Fixes: 0dd2d7494cd8 ("x86/intel_rdt: Show bitmask of shareable resource with other executing units" Signed-off-by: Reinette Chatre reinette.chatre@intel.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Acked-by: Fenghua Yu fenghua.yu@intel.com Acked-by: Vikas Shivappa vikas.shivappa@linux.intel.com Acked-by: Tony Luck tony.luck@intel.com Link: https://lkml.kernel.org/r/815747bddc820ca221a8924edaf4d1a7324547e4.150849011... Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/x86/kernel/cpu/intel_rdt.c | 1 + 1 file changed, 1 insertion(+)
--- a/arch/x86/kernel/cpu/intel_rdt.c +++ b/arch/x86/kernel/cpu/intel_rdt.c @@ -267,6 +267,7 @@ static void rdt_get_cdp_l3_config(int ty r->num_closid = r_l3->num_closid / 2; r->cache.cbm_len = r_l3->cache.cbm_len; r->default_ctrl = r_l3->default_ctrl; + r->cache.shareable_bits = r_l3->cache.shareable_bits; r->data_width = (r->cache.cbm_len + 3) / 4; r->alloc_capable = true; /*
Patches currently in stable-queue which might be from reinette.chatre@intel.com are
queue-4.14/x86-intel_rdt-fix-potential-deadlock-during-resctrl-mount.patch queue-4.14/x86-intel_rdt-initialize-bitmask-of-shareable-resource-if-cdp-enabled.patch