diff options
Diffstat (limited to 'arch/x86/xen')
-rw-r--r-- | arch/x86/xen/enlighten.c | 2 | ||||
-rw-r--r-- | arch/x86/xen/enlighten_pv.c | 3 | ||||
-rw-r--r-- | arch/x86/xen/mmu_pv.c | 2 | ||||
-rw-r--r-- | arch/x86/xen/p2m.c | 6 | ||||
-rw-r--r-- | arch/x86/xen/platform-pci-unplug.c | 4 | ||||
-rw-r--r-- | arch/x86/xen/spinlock.c | 33 | ||||
-rw-r--r-- | arch/x86/xen/xen-pvh.S | 2 |
7 files changed, 23 insertions, 29 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 67b2f31a1265..e996e8e744cb 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 #ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG -#include <linux/bootmem.h> +#include <linux/memblock.h> #endif #include <linux/cpu.h> #include <linux/kexec.h> diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index ec7a4209f310..2f6787fc7106 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -23,7 +23,7 @@ #include <linux/start_kernel.h> #include <linux/sched.h> #include <linux/kprobes.h> -#include <linux/bootmem.h> +#include <linux/memblock.h> #include <linux/export.h> #include <linux/mm.h> #include <linux/page-flags.h> @@ -31,7 +31,6 @@ #include <linux/console.h> #include <linux/pci.h> #include <linux/gfp.h> -#include <linux/memblock.h> #include <linux/edd.h> #include <linux/frame.h> diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c index 70ea598a37d2..0d7b3ae4960b 100644 --- a/arch/x86/xen/mmu_pv.c +++ b/arch/x86/xen/mmu_pv.c @@ -864,7 +864,7 @@ static int __init xen_mark_pinned(struct mm_struct *mm, struct page *page, * The init_mm pagetable is really pinned as soon as its created, but * that's before we have page structures to store the bits. So do all * the book-keeping now once struct pages for allocated pages are - * initialized. This happens only after free_all_bootmem() is called. + * initialized. This happens only after memblock_free_all() is called. */ static void __init xen_after_bootmem(void) { diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c index d6d74efd8912..b06731705529 100644 --- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -67,7 +67,7 @@ #include <linux/hash.h> #include <linux/sched.h> #include <linux/seq_file.h> -#include <linux/bootmem.h> +#include <linux/memblock.h> #include <linux/slab.h> #include <linux/vmalloc.h> @@ -182,7 +182,7 @@ static void p2m_init_identity(unsigned long *p2m, unsigned long pfn) static void * __ref alloc_p2m_page(void) { if (unlikely(!slab_is_available())) - return alloc_bootmem_align(PAGE_SIZE, PAGE_SIZE); + return memblock_alloc(PAGE_SIZE, PAGE_SIZE); return (void *)__get_free_page(GFP_KERNEL); } @@ -190,7 +190,7 @@ static void * __ref alloc_p2m_page(void) static void __ref free_p2m_page(void *p) { if (unlikely(!slab_is_available())) { - free_bootmem((unsigned long)p, PAGE_SIZE); + memblock_free((unsigned long)p, PAGE_SIZE); return; } diff --git a/arch/x86/xen/platform-pci-unplug.c b/arch/x86/xen/platform-pci-unplug.c index 66ab96a4e2b3..96d7f7d39cb9 100644 --- a/arch/x86/xen/platform-pci-unplug.c +++ b/arch/x86/xen/platform-pci-unplug.c @@ -134,6 +134,10 @@ void xen_unplug_emulated_devices(void) { int r; + /* PVH guests don't have emulated devices. */ + if (xen_pvh_domain()) + return; + /* user explicitly requested no unplug */ if (xen_emul_unplug & XEN_UNPLUG_NEVER) return; diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c index 23f6793af88a..441c88262169 100644 --- a/arch/x86/xen/spinlock.c +++ b/arch/x86/xen/spinlock.c @@ -39,34 +39,25 @@ static void xen_qlock_kick(int cpu) */ static void xen_qlock_wait(u8 *byte, u8 val) { + unsigned long flags; int irq = __this_cpu_read(lock_kicker_irq); /* If kicker interrupts not initialized yet, just spin */ - if (irq == -1) + if (irq == -1 || in_nmi()) return; - /* clear pending */ - xen_clear_irq_pending(irq); - barrier(); - - /* - * We check the byte value after clearing pending IRQ to make sure - * that we won't miss a wakeup event because of the clearing. - * - * The sync_clear_bit() call in xen_clear_irq_pending() is atomic. - * So it is effectively a memory barrier for x86. - */ - if (READ_ONCE(*byte) != val) - return; + /* Guard against reentry. */ + local_irq_save(flags); - /* - * If an interrupt happens here, it will leave the wakeup irq - * pending, which will cause xen_poll_irq() to return - * immediately. - */ + /* If irq pending already clear it. */ + if (xen_test_irq_pending(irq)) { + xen_clear_irq_pending(irq); + } else if (READ_ONCE(*byte) == val) { + /* Block until irq becomes pending (or a spurious wakeup) */ + xen_poll_irq(irq); + } - /* Block until irq becomes pending (or perhaps a spurious wakeup) */ - xen_poll_irq(irq); + local_irq_restore(flags); } static irqreturn_t dummy_handler(int irq, void *dev_id) diff --git a/arch/x86/xen/xen-pvh.S b/arch/x86/xen/xen-pvh.S index b0e471506cd8..1f8825bbaffb 100644 --- a/arch/x86/xen/xen-pvh.S +++ b/arch/x86/xen/xen-pvh.S @@ -170,7 +170,7 @@ canary: .fill 48, 1, 0 early_stack: - .fill 256, 1, 0 + .fill BOOT_STACK_SIZE, 1, 0 early_stack_end: ELFNOTE(Xen, XEN_ELFNOTE_PHYS32_ENTRY, |