From: Peter Zijlstra <peterz@infradead.org>
To: dave.hansen@intel.com, luto@kernel.org, peterz@infradead.org
Cc: x86@kernel.org, Tom.StDenis@amd.com, linux-kernel@vger.kernel.org
Subject: [RFC][PATCH 05/10] x86/mm/cpa: Cleanup...
Date: Mon, 03 Dec 2018 18:03:48 +0100 [thread overview]
Message-ID: <20181203171043.366619025@infradead.org> (raw)
In-Reply-To: 20181203170343.054618965@infradead.org
Since cpa->vaddr is invariant, this means we can remove all
workarounds that deal with it changing.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/x86/mm/pageattr-test.c | 7 ++-----
arch/x86/mm/pageattr.c | 13 ++++---------
2 files changed, 6 insertions(+), 14 deletions(-)
--- a/arch/x86/mm/pageattr-test.c
+++ b/arch/x86/mm/pageattr-test.c
@@ -124,7 +124,6 @@ static int pageattr_test(void)
unsigned int level;
int i, k;
int err;
- unsigned long test_addr;
if (print)
printk(KERN_INFO "CPA self-test:\n");
@@ -181,8 +180,7 @@ static int pageattr_test(void)
switch (i % 3) {
case 0:
- test_addr = addr[i];
- err = change_page_attr_set(&test_addr, len[i], PAGE_CPA_TEST, 0);
+ err = change_page_attr_set(&addr[i], len[i], PAGE_CPA_TEST, 0);
break;
case 1:
@@ -226,8 +224,7 @@ static int pageattr_test(void)
failed++;
continue;
}
- test_addr = addr[i];
- err = change_page_attr_clear(&test_addr, len[i], PAGE_CPA_TEST, 0);
+ err = change_page_attr_clear(&addr[i], len[i], PAGE_CPA_TEST, 0);
if (err < 0) {
printk(KERN_ERR "CPA reverting failed: %d\n", err);
failed++;
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -1908,15 +1908,13 @@ EXPORT_SYMBOL_GPL(set_memory_array_wt);
int _set_memory_wc(unsigned long addr, int numpages)
{
int ret;
- unsigned long addr_copy = addr;
ret = change_page_attr_set(&addr, numpages,
cachemode2pgprot(_PAGE_CACHE_MODE_UC_MINUS),
0);
if (!ret) {
- ret = change_page_attr_set_clr(&addr_copy, numpages,
- cachemode2pgprot(
- _PAGE_CACHE_MODE_WC),
+ ret = change_page_attr_set_clr(&addr, numpages,
+ cachemode2pgprot(_PAGE_CACHE_MODE_WC),
__pgprot(_PAGE_CACHE_MASK),
0, 0, NULL);
}
@@ -2064,7 +2062,6 @@ int set_memory_global(unsigned long addr
static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc)
{
struct cpa_data cpa;
- unsigned long start;
int ret;
/* Nothing to do if memory encryption is not active */
@@ -2075,8 +2072,6 @@ static int __set_memory_enc_dec(unsigned
if (WARN_ONCE(addr & ~PAGE_MASK, "misaligned address: %#lx\n", addr))
addr &= PAGE_MASK;
- start = addr;
-
memset(&cpa, 0, sizeof(cpa));
cpa.vaddr = &addr;
cpa.numpages = numpages;
@@ -2091,7 +2086,7 @@ static int __set_memory_enc_dec(unsigned
/*
* Before changing the encryption attribute, we need to flush caches.
*/
- cpa_flush_range(start, numpages, 1);
+ cpa_flush_range(addr, numpages, 1);
ret = __change_page_attr_set_clr(&cpa, 1);
@@ -2102,7 +2097,7 @@ static int __set_memory_enc_dec(unsigned
* in case TLB flushing gets optimized in the cpa_flush_range()
* path use the same logic as above.
*/
- cpa_flush_range(start, numpages, 0);
+ cpa_flush_range(addr, numpages, 0);
return ret;
}
next prev parent reply other threads:[~2018-12-03 17:14 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-03 17:03 [RFC][PATCH 00/10] x86/mm/cpa: Various fixes and improvements Peter Zijlstra
2018-12-03 17:03 ` [PATCH 01/10] x86/mm/cpa: Fix cpa_flush_array() TLB invalidation Peter Zijlstra
2018-12-17 18:20 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-12-03 17:03 ` [RFC][PATCH 02/10] x86/mm/cpa: Add ARRAY and PAGES_ARRAY selftests Peter Zijlstra
2018-12-17 18:21 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-12-03 17:03 ` [RFC][PATCH 03/10] x86/mm/cpa: Add __cpa_addr() helper Peter Zijlstra
2018-12-17 18:21 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-12-03 17:03 ` [RFC][PATCH 04/10] x86/mm/cpa: Make cpa_data::vaddr invariant Peter Zijlstra
2018-12-17 18:22 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-12-03 17:03 ` Peter Zijlstra [this message]
2018-12-17 18:23 ` [tip:x86/mm] x86/mm/cpa: Simplify the code after making cpa->vaddr invariant tip-bot for Peter Zijlstra
2018-12-03 17:03 ` [RFC][PATCH 06/10] x86/mm/cpa: Optimize cpa_flush_array() TLB invalidation Peter Zijlstra
2018-12-17 18:23 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-12-03 17:03 ` [RFC][PATCH 07/10] x86/mm/cpa: Make cpa_data::numpages invariant Peter Zijlstra
2018-12-17 18:24 ` [tip:x86/mm] " tip-bot for Peter Zijlstra
2018-12-03 17:03 ` [RFC][PATCH 08/10] x86/mm/cpa: Fold cpa_flush_range() and cpa_flush_array() Peter Zijlstra
2018-12-17 18:24 ` [tip:x86/mm] x86/mm/cpa: Fold cpa_flush_range() and cpa_flush_array() into a single cpa_flush() function tip-bot for Peter Zijlstra
2018-12-03 17:03 ` [RFC][PATCH 09/10] x86/mm/cpa: Better use clflushopt Peter Zijlstra
2018-12-17 18:25 ` [tip:x86/mm] x86/mm/cpa: Better use CLFLUSHOPT tip-bot for Peter Zijlstra
2018-12-03 17:03 ` [RFC][PATCH 10/10] x86/mm/cpa: Rename @addrinarray Peter Zijlstra
2018-12-17 18:26 ` [tip:x86/mm] x86/mm/cpa: Rename @addrinarray to @numpages tip-bot for Peter Zijlstra
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