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x86, mpparse, x86/acpi, x86/PCI, x86/dmi, SFI: Use memremap() for RAM mappings

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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>
This commit is contained in:
Tom Lendacky
2017-07-17 16:10:00 -05:00
committed by Ingo Molnar
parent aac7b79eea
commit f7750a7956
9 changed files with 55 additions and 66 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/x86/kernel/mpparse.c
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@@ -436,9 +436,9 @@ static unsigned long __init get_mpc_size(unsigned long physptr)
struct mpc_table *mpc;
unsigned long size;
mpc = early_ioremap(physptr, PAGE_SIZE);
mpc = early_memremap(physptr, PAGE_SIZE);
size = mpc->length;
early_iounmap(mpc, PAGE_SIZE);
early_memunmap(mpc, PAGE_SIZE);
apic_printk(APIC_VERBOSE, " mpc: %lx-%lx\n", physptr, physptr + size);
return size;
@@ -450,7 +450,7 @@ static int __init check_physptr(struct mpf_intel *mpf, unsigned int early)
unsigned long size;
size = get_mpc_size(mpf->physptr);
mpc = early_ioremap(mpf->physptr, size);
mpc = early_memremap(mpf->physptr, size);
/*
* Read the physical hardware table. Anything here will
* override the defaults.
@@ -461,10 +461,10 @@ static int __init check_physptr(struct mpf_intel *mpf, unsigned int early)
#endif
pr_err("BIOS bug, MP table errors detected!...\n");
pr_cont("... disabling SMP support. (tell your hw vendor)\n");
early_iounmap(mpc, size);
early_memunmap(mpc, size);
return -1;
}
early_iounmap(mpc, size);
early_memunmap(mpc, size);
if (early)
return -1;