From: Joerg Roedel <joro@8bytes.org>
To: x86@kernel.org
Cc: hpa@zytor.com, Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Steven Rostedt <rostedt@goodmis.org>,
joro@8bytes.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Joerg Roedel <jroedel@suse.de>
Subject: [PATCH v2 2/3] x86/mm/64: Do not sync vmalloc/ioremap mappings
Date: Wed, 1 Jul 2020 10:38:37 +0200 [thread overview]
Message-ID: <20200701083839.19193-3-joro@8bytes.org> (raw)
In-Reply-To: <20200701083839.19193-1-joro@8bytes.org>
From: Joerg Roedel <jroedel@suse.de>
Remove the code to sync the vmalloc and ioremap ranges for x86-64. The
page-table pages are all pre-allocated now so that synchronizing the
top-level page happens at page-table creation.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
arch/x86/include/asm/pgtable_64_types.h | 2 --
arch/x86/mm/init_64.c | 5 -----
2 files changed, 7 deletions(-)
diff --git a/arch/x86/include/asm/pgtable_64_types.h b/arch/x86/include/asm/pgtable_64_types.h
index 8f63efb2a2cc..52e5f5f2240d 100644
--- a/arch/x86/include/asm/pgtable_64_types.h
+++ b/arch/x86/include/asm/pgtable_64_types.h
@@ -159,6 +159,4 @@ extern unsigned int ptrs_per_p4d;
#define PGD_KERNEL_START ((PAGE_SIZE / 2) / sizeof(pgd_t))
-#define ARCH_PAGE_TABLE_SYNC_MASK (pgtable_l5_enabled() ? PGTBL_PGD_MODIFIED : PGTBL_P4D_MODIFIED)
-
#endif /* _ASM_X86_PGTABLE_64_DEFS_H */
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index e76bdb001460..e0cd2dfd333d 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -217,11 +217,6 @@ void sync_global_pgds(unsigned long start, unsigned long end)
sync_global_pgds_l4(start, end);
}
-void arch_sync_kernel_mappings(unsigned long start, unsigned long end)
-{
- sync_global_pgds(start, end);
-}
-
/*
* NOTE: This function is marked __ref because it calls __init function
* (alloc_bootmem_pages). It's safe to do it ONLY when after_bootmem == 0.
--
2.17.1
next prev parent reply other threads:[~2020-07-01 8:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-01 8:38 [PATCH v2 0/3] x86/mm/64: Remove vmalloc/ioremap pgtable synchronization Joerg Roedel
2020-07-01 8:38 ` [PATCH v2 1/3] x86/mm/64: Pre-allocate p4d/pud pages for vmalloc area Joerg Roedel
2020-07-01 8:38 ` Joerg Roedel [this message]
2020-07-01 8:38 ` [PATCH v2 3/3] x86/mm/64: Make sync_global_pgds() static Joerg Roedel
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