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From a8a15f027d412cbb6917306222449644af897eb6 Mon Sep 17 00:00:00 2001 |
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From: Xiaochen Shen <xiaochen.shen@intel.com> |
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Date: Wed, 12 Sep 2018 16:48:38 -0700 |
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Subject: [PATCH 037/145] x86/intel_rdt: Show missing resctrl mount options |
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[ Upstream commit 2cc81c6992248ea37d0241bc325977bab310bc3b ] |
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In resctrl filesystem, mount options exist to enable L3/L2 CDP and MBA |
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Software Controller features if the platform supports them: |
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mount -t resctrl resctrl [-o cdp[,cdpl2][,mba_MBps]] /sys/fs/resctrl |
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But currently only "cdp" option is displayed in /proc/mounts. "cdpl2" and |
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"mba_MBps" options are not shown even when they are active. |
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Before: |
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# mount -t resctrl resctrl -o cdp,mba_MBps /sys/fs/resctrl |
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# grep resctrl /proc/mounts |
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/sys/fs/resctrl /sys/fs/resctrl resctrl rw,relatime,cdp 0 0 |
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After: |
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# mount -t resctrl resctrl -o cdp,mba_MBps /sys/fs/resctrl |
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# grep resctrl /proc/mounts |
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/sys/fs/resctrl /sys/fs/resctrl resctrl rw,relatime,cdp,mba_MBps 0 0 |
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Signed-off-by: Xiaochen Shen <xiaochen.shen@intel.com> |
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Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> |
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
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Cc: "H Peter Anvin" <hpa@zytor.com> |
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Cc: "Tony Luck" <tony.luck@intel.com> |
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Link: https://lkml.kernel.org/r/1536796118-60135-1-git-send-email-fenghua.yu@intel.com |
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Signed-off-by: Sasha Levin <sashal@kernel.org> |
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--- |
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arch/x86/kernel/cpu/intel_rdt_rdtgroup.c | 7 +++++++ |
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1 file changed, 7 insertions(+) |
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diff --git a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c |
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index b140c68bc14b..643670fb8943 100644 |
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--- a/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c |
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+++ b/arch/x86/kernel/cpu/intel_rdt_rdtgroup.c |
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@@ -2805,6 +2805,13 @@ static int rdtgroup_show_options(struct seq_file *seq, struct kernfs_root *kf) |
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{ |
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if (rdt_resources_all[RDT_RESOURCE_L3DATA].alloc_enabled) |
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seq_puts(seq, ",cdp"); |
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+ |
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+ if (rdt_resources_all[RDT_RESOURCE_L2DATA].alloc_enabled) |
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+ seq_puts(seq, ",cdpl2"); |
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+ |
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+ if (is_mba_sc(&rdt_resources_all[RDT_RESOURCE_MBA])) |
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+ seq_puts(seq, ",mba_MBps"); |
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+ |
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return 0; |
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} |
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-- |
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2.19.1 |
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