From: ira.weiny@intel.com
To: Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Dan Williams <dan.j.williams@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
"Shankar, Ravi V" <ravi.v.shankar@intel.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH V9 39/45] memremap_pages: Set PKS pkey in PTEs if requested
Date: Thu, 10 Mar 2022 09:20:13 -0800 [thread overview]
Message-ID: <20220310172019.850939-40-ira.weiny@intel.com> (raw)
In-Reply-To: <20220310172019.850939-1-ira.weiny@intel.com>
From: Ira Weiny <ira.weiny@intel.com>
When a devmap caller requests protections, the dev_pagemap PTE's need to
have a PKEY set.
When PGMAP_PROTECTIONS is requested add the pkey to the page
protections.
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
Changes for V9
From Dave Hansen
use pkey
---
mm/memremap.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/mm/memremap.c b/mm/memremap.c
index 38d321cc59c2..cefdf541bcc1 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -82,6 +82,14 @@ static void devmap_protection_enable(void)
static_branch_inc(&dev_pgmap_protection_static_key);
}
+static pgprot_t devmap_protection_adjust_pgprot(pgprot_t prot)
+{
+ pgprotval_t val;
+
+ val = pgprot_val(prot);
+ return __pgprot(val | _PAGE_PKEY(PKS_KEY_PGMAP_PROTECTION));
+}
+
static void devmap_protection_disable(void)
{
static_branch_dec(&dev_pgmap_protection_static_key);
@@ -92,6 +100,10 @@ static void devmap_protection_disable(void)
static void devmap_protection_enable(void) { }
static void devmap_protection_disable(void) { }
+static pgprot_t devmap_protection_adjust_pgprot(pgprot_t prot)
+{
+ return prot;
+}
#endif /* CONFIG_DEVMAP_ACCESS_PROTECTION */
static void pgmap_array_delete(struct range *range)
@@ -346,6 +358,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
if (!pgmap_protection_available())
return ERR_PTR(-EINVAL);
devmap_protection_enable();
+ params.pgprot = devmap_protection_adjust_pgprot(params.pgprot);
}
switch (pgmap->type) {
--
2.35.1
next prev parent reply other threads:[~2022-03-10 17:23 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-10 17:19 [PATCH V9 00/45] PKS/PMEM: Add Stray Write Protection ira.weiny
2022-03-10 17:19 ` [PATCH V9 01/45] entry: Create an internal irqentry_exit_cond_resched() call ira.weiny
2022-04-07 2:48 ` Ira Weiny
2022-03-10 17:19 ` [PATCH V9 02/45] Documentation/protection-keys: Clean up documentation for User Space pkeys ira.weiny
2022-03-10 17:19 ` [PATCH V9 03/45] x86/pkeys: Clarify PKRU_AD_KEY macro ira.weiny
2022-03-10 17:19 ` [PATCH V9 04/45] x86/pkeys: Make PKRU macros generic ira.weiny
2022-03-10 17:19 ` [PATCH V9 05/45] x86/fpu: Refactor arch_set_user_pkey_access() ira.weiny
2022-03-10 17:19 ` [PATCH V9 06/45] mm/pkeys: Add Kconfig options for PKS ira.weiny
2022-03-10 17:19 ` [PATCH V9 07/45] x86/pkeys: Add PKS CPU feature bit ira.weiny
2022-03-10 17:19 ` [PATCH V9 08/45] x86/fault: Adjust WARN_ON for pkey fault ira.weiny
2022-03-10 17:19 ` [PATCH V9 09/45] Documentation/pkeys: Add initial PKS documentation ira.weiny
2022-03-10 17:19 ` [PATCH V9 10/45] mm/pkeys: Provide for PKS key allocation ira.weiny
2022-03-10 17:19 ` [PATCH V9 11/45] x86/pkeys: Enable PKS on cpus which support it ira.weiny
2022-03-10 17:19 ` [PATCH V9 12/45] mm/pkeys: Define PKS page table macros ira.weiny
2022-03-10 17:19 ` [PATCH V9 13/45] mm/pkeys: PKS testing, add initial test code ira.weiny
2022-03-10 17:19 ` [PATCH V9 14/45] x86/selftests: Add test_pks ira.weiny
2022-03-10 17:19 ` [PATCH V9 15/45] x86/pkeys: Introduce pks_write_pkrs() ira.weiny
2022-03-10 17:19 ` [PATCH V9 16/45] x86/pkeys: Preserve the PKS MSR on context switch ira.weiny
2022-03-10 17:19 ` [PATCH V9 17/45] mm/pkeys: Introduce pks_set_readwrite() ira.weiny
2022-03-10 17:19 ` [PATCH V9 18/45] mm/pkeys: Introduce pks_set_noaccess() ira.weiny
2022-03-10 17:19 ` [PATCH V9 19/45] mm/pkeys: Introduce PKS fault callbacks ira.weiny
2022-03-10 17:19 ` [PATCH V9 20/45] mm/pkeys: PKS testing, add a fault call back ira.weiny
2022-03-10 17:19 ` [PATCH V9 21/45] mm/pkeys: PKS testing, add pks_set_*() tests ira.weiny
2022-03-10 17:19 ` [PATCH V9 22/45] mm/pkeys: PKS testing, test context switching ira.weiny
2022-03-10 17:19 ` [PATCH V9 23/45] x86/entry: Add auxiliary pt_regs space ira.weiny
2022-03-10 17:19 ` [PATCH V9 24/45] entry: Split up irqentry_exit_cond_resched() ira.weiny
2022-04-07 2:50 ` Ira Weiny
2022-03-10 17:19 ` [PATCH V9 25/45] entry: Add calls for save/restore auxiliary pt_regs ira.weiny
2022-03-10 17:20 ` [PATCH V9 26/45] x86/entry: Define arch_{save|restore}_auxiliary_pt_regs() ira.weiny
2022-03-10 17:20 ` [PATCH V9 27/45] x86/pkeys: Preserve PKRS MSR across exceptions ira.weiny
2022-03-10 17:20 ` [PATCH V9 28/45] x86/fault: Print PKS MSR on fault ira.weiny
2022-03-10 17:20 ` [PATCH V9 29/45] mm/pkeys: PKS testing, Add exception test ira.weiny
2022-03-10 17:20 ` [PATCH V9 30/45] mm/pkeys: Introduce pks_update_exception() ira.weiny
2022-03-10 17:20 ` [PATCH V9 31/45] mm/pkeys: PKS testing, test pks_update_exception() ira.weiny
2022-03-10 17:20 ` [PATCH V9 32/45] mm/pkeys: PKS testing, add test for all keys ira.weiny
2022-03-10 17:20 ` [PATCH V9 33/45] mm/pkeys: Add pks_available() ira.weiny
2022-03-10 17:20 ` [PATCH V9 34/45] memremap_pages: Add Kconfig for DEVMAP_ACCESS_PROTECTION ira.weiny
2022-03-10 17:20 ` [PATCH V9 35/45] memremap_pages: Introduce pgmap_protection_available() ira.weiny
2022-03-10 17:20 ` [PATCH V9 36/45] memremap_pages: Introduce a PGMAP_PROTECTION flag ira.weiny
2022-03-10 17:20 ` [PATCH V9 37/45] memremap_pages: Introduce devmap_protected() ira.weiny
2022-03-10 17:20 ` [PATCH V9 38/45] memremap_pages: Reserve a PKS pkey for eventual use by PMEM ira.weiny
2022-03-10 17:20 ` ira.weiny [this message]
2022-03-10 17:20 ` [PATCH V9 40/45] memremap_pages: Define pgmap_set_{readwrite|noaccess}() calls ira.weiny
2022-03-10 17:20 ` [PATCH V9 41/45] memremap_pages: Add memremap.pks_fault_mode ira.weiny
2022-03-10 17:20 ` [PATCH V9 42/45] kmap: Make kmap work for devmap protected pages ira.weiny
2022-03-10 17:20 ` [PATCH V9 43/45] dax: Stray access protection for dax_direct_access() ira.weiny
2022-03-10 17:20 ` [PATCH V9 44/45] nvdimm/pmem: Enable stray access protection ira.weiny
2022-03-10 17:20 ` [PATCH V9 45/45] devdax: " ira.weiny
2022-03-31 17:13 ` [PATCH V9 00/45] PKS/PMEM: Add Stray Write Protection Ira Weiny
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