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authorTom Lendacky <thomas.lendacky@amd.com>2017-07-18 00:10:00 +0300
committerIngo Molnar <mingo@kernel.org>2017-07-18 12:37:58 +0300
commitf7750a79568788473c5e8092ee58a52248f34329 (patch)
tree7e179f9a50f488b5a395a8989a7ab9d9981851ca /drivers/sfi
parentaac7b79eea6118dee3da9b99dcd564471672806d (diff)
downloadlinux-f7750a79568788473c5e8092ee58a52248f34329.tar.xz
x86, mpparse, x86/acpi, x86/PCI, x86/dmi, SFI: Use memremap() for RAM mappings
The ioremap() function is intended for mapping MMIO. For RAM, the memremap() function should be used. Convert calls from ioremap() to memremap() when re-mapping RAM. This will be used later by SME to control how the encryption mask is applied to memory mappings, with certain memory locations being mapped decrypted vs encrypted. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@suse.de> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Dave Young <dyoung@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Larry Woodman <lwoodman@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Toshimitsu Kani <toshi.kani@hpe.com> Cc: kasan-dev@googlegroups.com Cc: kvm@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-doc@vger.kernel.org Cc: linux-efi@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/b13fccb9abbd547a7eef7b1fdfc223431b211c88.1500319216.git.thomas.lendacky@amd.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/sfi')
-rw-r--r--drivers/sfi/sfi_core.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/sfi/sfi_core.c b/drivers/sfi/sfi_core.c
index 296db7a69c27..d5ce53491efb 100644
--- a/drivers/sfi/sfi_core.c
+++ b/drivers/sfi/sfi_core.c
@@ -86,13 +86,13 @@ static struct sfi_table_simple *syst_va __read_mostly;
/*
* FW creates and saves the SFI tables in memory. When these tables get
* used, they may need to be mapped to virtual address space, and the mapping
- * can happen before or after the ioremap() is ready, so a flag is needed
+ * can happen before or after the memremap() is ready, so a flag is needed
* to indicating this
*/
-static u32 sfi_use_ioremap __read_mostly;
+static u32 sfi_use_memremap __read_mostly;
/*
- * sfi_un/map_memory calls early_ioremap/iounmap which is a __init function
+ * sfi_un/map_memory calls early_memremap/memunmap which is a __init function
* and introduces section mismatch. So use __ref to make it calm.
*/
static void __iomem * __ref sfi_map_memory(u64 phys, u32 size)
@@ -100,10 +100,10 @@ static void __iomem * __ref sfi_map_memory(u64 phys, u32 size)
if (!phys || !size)
return NULL;
- if (sfi_use_ioremap)
- return ioremap_cache(phys, size);
+ if (sfi_use_memremap)
+ return memremap(phys, size, MEMREMAP_WB);
else
- return early_ioremap(phys, size);
+ return early_memremap(phys, size);
}
static void __ref sfi_unmap_memory(void __iomem *virt, u32 size)
@@ -111,10 +111,10 @@ static void __ref sfi_unmap_memory(void __iomem *virt, u32 size)
if (!virt || !size)
return;
- if (sfi_use_ioremap)
- iounmap(virt);
+ if (sfi_use_memremap)
+ memunmap(virt);
else
- early_iounmap(virt, size);
+ early_memunmap(virt, size);
}
static void sfi_print_table_header(unsigned long long pa,
@@ -507,8 +507,8 @@ void __init sfi_init_late(void)
length = syst_va->header.len;
sfi_unmap_memory(syst_va, sizeof(struct sfi_table_simple));
- /* Use ioremap now after it is ready */
- sfi_use_ioremap = 1;
+ /* Use memremap now after it is ready */
+ sfi_use_memremap = 1;
syst_va = sfi_map_memory(syst_pa, length);
sfi_acpi_init();