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authorLinus Torvalds <torvalds@linux-foundation.org>2014-02-05 16:01:11 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-02-05 16:01:11 -0800
commit1cd731df09decfc7e9b4b86190efa262851f68e9 (patch)
tree2ce721ab61a4234820a3d33c08f3d868a484ef65 /arch/x86/xen
parent251aa0fddd6149e730737c8619862a0160b00a5a (diff)
parentafca50132cfa7bfc5646676d8c67dc18454f38f8 (diff)
downloadop-kernel-dev-1cd731df09decfc7e9b4b86190efa262851f68e9.zip
op-kernel-dev-1cd731df09decfc7e9b4b86190efa262851f68e9.tar.gz
Merge tag 'stable/for-linus-3.14-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull Xen fixes from Konrad Rzeszutek Wilk: "Bug-fixes: - Revert "xen/grant-table: Avoid m2p_override during mapping" as it broke Xen ARM build. - Fix CR4 not being set on AP processors in Xen PVH mode" * tag 'stable/for-linus-3.14-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/pvh: set CR4 flags for APs Revert "xen/grant-table: Avoid m2p_override during mapping"
Diffstat (limited to 'arch/x86/xen')
-rw-r--r--arch/x86/xen/enlighten.c12
-rw-r--r--arch/x86/xen/p2m.c17
2 files changed, 27 insertions, 2 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index a4d7b64..201d09a 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1473,6 +1473,18 @@ static void xen_pvh_set_cr_flags(int cpu)
* X86_CR0_TS, X86_CR0_PE, X86_CR0_ET are set by Xen for HVM guests
* (which PVH shared codepaths), while X86_CR0_PG is for PVH. */
write_cr0(read_cr0() | X86_CR0_MP | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM);
+
+ if (!cpu)
+ return;
+ /*
+ * For BSP, PSE PGE are set in probe_page_size_mask(), for APs
+ * set them here. For all, OSFXSR OSXMMEXCPT are set in fpu_init.
+ */
+ if (cpu_has_pse)
+ set_in_cr4(X86_CR4_PSE);
+
+ if (cpu_has_pge)
+ set_in_cr4(X86_CR4_PGE);
}
/*
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 8009acb..696c694 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -899,6 +899,13 @@ int m2p_add_override(unsigned long mfn, struct page *page,
"m2p_add_override: pfn %lx not mapped", pfn))
return -EINVAL;
}
+ WARN_ON(PagePrivate(page));
+ SetPagePrivate(page);
+ set_page_private(page, mfn);
+ page->index = pfn_to_mfn(pfn);
+
+ if (unlikely(!set_phys_to_machine(pfn, FOREIGN_FRAME(mfn))))
+ return -ENOMEM;
if (kmap_op != NULL) {
if (!PageHighMem(page)) {
@@ -937,16 +944,19 @@ int m2p_add_override(unsigned long mfn, struct page *page,
}
EXPORT_SYMBOL_GPL(m2p_add_override);
int m2p_remove_override(struct page *page,
- struct gnttab_map_grant_ref *kmap_op,
- unsigned long mfn)
+ struct gnttab_map_grant_ref *kmap_op)
{
unsigned long flags;
+ unsigned long mfn;
unsigned long pfn;
unsigned long uninitialized_var(address);
unsigned level;
pte_t *ptep = NULL;
pfn = page_to_pfn(page);
+ mfn = get_phys_to_machine(pfn);
+ if (mfn == INVALID_P2M_ENTRY || !(mfn & FOREIGN_FRAME_BIT))
+ return -EINVAL;
if (!PageHighMem(page)) {
address = (unsigned long)__va(pfn << PAGE_SHIFT);
@@ -960,7 +970,10 @@ int m2p_remove_override(struct page *page,
spin_lock_irqsave(&m2p_override_lock, flags);
list_del(&page->lru);
spin_unlock_irqrestore(&m2p_override_lock, flags);
+ WARN_ON(!PagePrivate(page));
+ ClearPagePrivate(page);
+ set_phys_to_machine(pfn, page->index);
if (kmap_op != NULL) {
if (!PageHighMem(page)) {
struct multicall_space mcs;
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