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Date: Thu, 10 Mar 2022 09:20:12 -0800 From: ira.weiny@...el.com To: Dave Hansen <dave.hansen@...ux.intel.com>, "H. Peter Anvin" <hpa@...or.com>, Dan Williams <dan.j.williams@...el.com> Cc: Ira Weiny <ira.weiny@...el.com>, Fenghua Yu <fenghua.yu@...el.com>, Rick Edgecombe <rick.p.edgecombe@...el.com>, "Shankar, Ravi V" <ravi.v.shankar@...el.com>, linux-kernel@...r.kernel.org Subject: [PATCH V9 38/45] memremap_pages: Reserve a PKS pkey for eventual use by PMEM From: Ira Weiny <ira.weiny@...el.com> Reserve a pkey for use by the memmap facility and set the default protections to Access Disabled. Signed-off-by: Ira Weiny <ira.weiny@...el.com> --- Changes for V9 Adjust for new key allocation From Dave Hansen use pkey --- include/linux/pks-keys.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/include/linux/pks-keys.h b/include/linux/pks-keys.h index f7e82e462659..32075ac54964 100644 --- a/include/linux/pks-keys.h +++ b/include/linux/pks-keys.h @@ -61,7 +61,9 @@ /* PKS_KEY_DEFAULT must be 0 */ #define PKS_KEY_DEFAULT 0 #define PKS_KEY_TEST PKS_NEW_KEY(PKS_KEY_DEFAULT, CONFIG_PKS_TEST) -#define PKS_KEY_MAX PKS_NEW_KEY(PKS_KEY_TEST, 1) +#define PKS_KEY_PGMAP_PROTECTION \ + PKS_NEW_KEY(PKS_KEY_TEST, CONFIG_DEVMAP_ACCESS_PROTECTION) +#define PKS_KEY_MAX PKS_NEW_KEY(PKS_KEY_PGMAP_PROTECTION, 1) #ifdef CONFIG_PKS_TEST_ALL_KEYS #undef PKS_KEY_MAX @@ -72,6 +74,8 @@ #define PKS_KEY_DEFAULT_INIT PKS_DECLARE_INIT_VALUE(PKS_KEY_DEFAULT, RW, 1) #define PKS_KEY_TEST_INIT PKS_DECLARE_INIT_VALUE(PKS_KEY_TEST, AD, \ CONFIG_PKS_TEST) +#define PKS_KEY_PGMAP_INIT PKS_DECLARE_INIT_VALUE(PKS_KEY_PGMAP_PROTECTION, \ + AD, CONFIG_DEVMAP_ACCESS_PROTECTION) #define PKS_ALL_AD_MASK \ GENMASK(PKS_NUM_PKEYS * PKR_BITS_PER_PKEY, \ @@ -79,7 +83,8 @@ #define PKS_INIT_VALUE ((PKS_ALL_AD & PKS_ALL_AD_MASK) | \ PKS_KEY_DEFAULT_INIT | \ - PKS_KEY_TEST_INIT \ + PKS_KEY_TEST_INIT | \ + PKS_KEY_PGMAP_INIT \ ) #endif /* CONFIG_ARCH_ENABLE_SUPERVISOR_PKEYS */ -- 2.35.1
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