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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 <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
Reviewed-by: Borislav Petkov <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brijesh Singh <[email protected]>
Cc: Dave Young <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: Larry Woodman <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Matt Fleming <[email protected]>
Cc: Michael S. Tsirkin <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Radim Krčmář <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Toshimitsu Kani <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/b13fccb9abbd547a7eef7b1fdfc223431b211c88.1500319216.git.thomas.lendacky@amd.com
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Tom Lendacky 2017-07-17 16:10:00 -05:00 • committed by Ingo Molnar
commit f7750a7956
9 changed files with 55 additions and 66 deletions
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22
drivers/sfi/sfi_core.c
View file

@ -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();