summaryrefslogtreecommitdiff
path: root/arch/x86/platform
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2018-04-02 15:45:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-02 15:45:30 -0700
commitd22fff81418edc92be534cad8d59da914049bf69 (patch)
tree96b22b20bbc789a76e744bcfc11a7f0854b62ece /arch/x86/platform
parent986b37c0ae4f0a3f93d8974d03a9cbc1502dd377 (diff)
parenteaeb8e76cd5751e805f6e4a3fcec91d283e3b0c2 (diff)
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm updates from Ingo Molnar: - Extend the memmap= boot parameter syntax to allow the redeclaration and dropping of existing ranges, and to support all e820 range types (Jan H. Schönherr) - Improve the W+X boot time security checks to remove false positive warnings on Xen (Jan Beulich) - Support booting as Xen PVH guest (Juergen Gross) - Improved 5-level paging (LA57) support, in particular it's possible now to have a single kernel image for both 4-level and 5-level hardware (Kirill A. Shutemov) - AMD hardware RAM encryption support (SME/SEV) fixes (Tom Lendacky) - Preparatory commits for hardware-encrypted RAM support on Intel CPUs. (Kirill A. Shutemov) - Improved Intel-MID support (Andy Shevchenko) - Show EFI page tables in page_tables debug files (Andy Lutomirski) - ... plus misc fixes and smaller cleanups * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (56 commits) x86/cpu/tme: Fix spelling: "configuation" -> "configuration" x86/boot: Fix SEV boot failure from change to __PHYSICAL_MASK_SHIFT x86/mm: Update comment in detect_tme() regarding x86_phys_bits x86/mm/32: Remove unused node_memmap_size_bytes() & CONFIG_NEED_NODE_MEMMAP_SIZE logic x86/mm: Remove pointless checks in vmalloc_fault x86/platform/intel-mid: Add special handling for ACPI HW reduced platforms ACPI, x86/boot: Introduce the ->reduced_hw_early_init() ACPI callback ACPI, x86/boot: Split out acpi_generic_reduce_hw_init() and export x86/pconfig: Provide defines and helper to run MKTME_KEY_PROG leaf x86/pconfig: Detect PCONFIG targets x86/tme: Detect if TME and MKTME is activated by BIOS x86/boot/compressed/64: Handle 5-level paging boot if kernel is above 4G x86/boot/compressed/64: Use page table in trampoline memory x86/boot/compressed/64: Use stack from trampoline memory x86/boot/compressed/64: Make sure we have a 32-bit code segment x86/mm: Do not use paravirtualized calls in native_set_p4d() kdump, vmcoreinfo: Export pgtable_l5_enabled value x86/boot/compressed/64: Prepare new top-level page table for trampoline x86/boot/compressed/64: Set up trampoline memory x86/boot/compressed/64: Save and restore trampoline memory ...
Diffstat (limited to 'arch/x86/platform')
-rw-r--r--arch/x86/platform/efi/efi_64.c10
-rw-r--r--arch/x86/platform/intel-mid/intel-mid.c6
2 files changed, 12 insertions, 4 deletions
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index f9cfbc0d1f33..7f443bd1411d 100644
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -27,6 +27,7 @@
#include <linux/ioport.h>
#include <linux/mc146818rtc.h>
#include <linux/efi.h>
+#include <linux/export.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/reboot.h>
@@ -190,7 +191,8 @@ void __init efi_call_phys_epilog(pgd_t *save_pgd)
early_code_mapping_set_exec(0);
}
-static pgd_t *efi_pgd;
+pgd_t *efi_pgd;
+EXPORT_SYMBOL_GPL(efi_pgd);
/*
* We need our own copy of the higher levels of the page tables
@@ -225,7 +227,7 @@ int __init efi_alloc_page_tables(void)
pud = pud_alloc(&init_mm, p4d, EFI_VA_END);
if (!pud) {
- if (CONFIG_PGTABLE_LEVELS > 4)
+ if (pgtable_l5_enabled)
free_page((unsigned long) pgd_page_vaddr(*pgd));
free_pages((unsigned long)efi_pgd, PGD_ALLOCATION_ORDER);
return -ENOMEM;
@@ -255,8 +257,8 @@ void efi_sync_low_kernel_mappings(void)
* only span a single PGD entry and that the entry also maps
* other important kernel regions.
*/
- BUILD_BUG_ON(pgd_index(EFI_VA_END) != pgd_index(MODULES_END));
- BUILD_BUG_ON((EFI_VA_START & PGDIR_MASK) !=
+ MAYBE_BUILD_BUG_ON(pgd_index(EFI_VA_END) != pgd_index(MODULES_END));
+ MAYBE_BUILD_BUG_ON((EFI_VA_START & PGDIR_MASK) !=
(EFI_VA_END & PGDIR_MASK));
pgd_efi = efi_pgd + pgd_index(PAGE_OFFSET);
diff --git a/arch/x86/platform/intel-mid/intel-mid.c b/arch/x86/platform/intel-mid/intel-mid.c
index fb1df9488e98..2ebdf31d9996 100644
--- a/arch/x86/platform/intel-mid/intel-mid.c
+++ b/arch/x86/platform/intel-mid/intel-mid.c
@@ -199,6 +199,12 @@ void __init x86_intel_mid_early_setup(void)
legacy_pic = &null_legacy_pic;
+ /*
+ * Do nothing for now as everything needed done in
+ * x86_intel_mid_early_setup() below.
+ */
+ x86_init.acpi.reduced_hw_early_init = x86_init_noop;
+
pm_power_off = intel_mid_power_off;
machine_ops.emergency_restart = intel_mid_reboot;