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Xen bug fixes for 3.15-rc5

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- Fix arm64 crash on boot.
 - Quiet a noisy arm build warning (virt_to_pfn() redefined).
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Merge tag 'stable/for-linus-3.15-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen bug fixes from David Vrabel:
 - Fix arm64 crash on boot.
 - Quiet a noisy arm build warning (virt_to_pfn() redefined).

* tag 'stable/for-linus-3.15-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  arm64: introduce virt_to_pfn
  xen/events/fifo: correctly align bitops
  arm/xen: Remove definiition of virt_to_pfn in asm/xen/page.h
This commit is contained in:
Linus Torvalds 2014-05-13 11:21:01 +09:00
parent 19726630c6 1f53ba6e81
commit 619b589190
3 changed files with 31 additions and 12 deletions
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1
arch/arm/include/asm/xen/page.h
View file

@ -77,7 +77,6 @@ static inline xpaddr_t machine_to_phys(xmaddr_t machine)
}
/* VIRT <-> MACHINE conversion */
#define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v))))
#define virt_to_pfn(v) (PFN_DOWN(__pa(v)))
#define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v)))
#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))

1
arch/arm64/include/asm/memory.h
View file

@ -138,6 +138,7 @@ static inline void *phys_to_virt(phys_addr_t x)
#define __pa(x) __virt_to_phys((unsigned long)(x))
#define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x)))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
#define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys(x))
/*
* virt_to_page(k) convert a _valid_ virtual address to struct page *

41
drivers/xen/events/events_fifo.c
View file

@ -66,7 +66,22 @@ static DEFINE_PER_CPU(struct evtchn_fifo_queue, cpu_queue);
static event_word_t *event_array[MAX_EVENT_ARRAY_PAGES] __read_mostly;
static unsigned event_array_pages __read_mostly;
/*
* sync_set_bit() and friends must be unsigned long aligned on non-x86
* platforms.
*/
#if !defined(CONFIG_X86) && BITS_PER_LONG > 32
#define BM(w) (unsigned long *)((unsigned long)w & ~0x7UL)
#define EVTCHN_FIFO_BIT(b, w) \
(((unsigned long)w & 0x4UL) ? (EVTCHN_FIFO_ ##b + 32) : EVTCHN_FIFO_ ##b)
#else
#define BM(w) ((unsigned long *)(w))
#define EVTCHN_FIFO_BIT(b, w) EVTCHN_FIFO_ ##b
#endif
static inline event_word_t *event_word_from_port(unsigned port)
{
@ -161,33 +176,38 @@ static void evtchn_fifo_bind_to_cpu(struct irq_info *info, unsigned cpu)
static void evtchn_fifo_clear_pending(unsigned port)
{
event_word_t *word = event_word_from_port(port);
sync_clear_bit(EVTCHN_FIFO_PENDING, BM(word));
sync_clear_bit(EVTCHN_FIFO_BIT(PENDING, word), BM(word));
}
static void evtchn_fifo_set_pending(unsigned port)
{
event_word_t *word = event_word_from_port(port);
sync_set_bit(EVTCHN_FIFO_PENDING, BM(word));
sync_set_bit(EVTCHN_FIFO_BIT(PENDING, word), BM(word));
}
static bool evtchn_fifo_is_pending(unsigned port)
{
event_word_t *word = event_word_from_port(port);
return sync_test_bit(EVTCHN_FIFO_PENDING, BM(word));
return sync_test_bit(EVTCHN_FIFO_BIT(PENDING, word), BM(word));
}
static bool evtchn_fifo_test_and_set_mask(unsigned port)
{
event_word_t *word = event_word_from_port(port);
return sync_test_and_set_bit(EVTCHN_FIFO_MASKED, BM(word));
return sync_test_and_set_bit(EVTCHN_FIFO_BIT(MASKED, word), BM(word));
}
static void evtchn_fifo_mask(unsigned port)
{
event_word_t *word = event_word_from_port(port);
sync_set_bit(EVTCHN_FIFO_MASKED, BM(word));
sync_set_bit(EVTCHN_FIFO_BIT(MASKED, word), BM(word));
}
static bool evtchn_fifo_is_masked(unsigned port)
{
event_word_t *word = event_word_from_port(port);
return sync_test_bit(EVTCHN_FIFO_BIT(MASKED, word), BM(word));
}
/*
* Clear MASKED, spinning if BUSY is set.
*/
@ -211,7 +231,7 @@ static void evtchn_fifo_unmask(unsigned port)
BUG_ON(!irqs_disabled());
clear_masked(word);
if (sync_test_bit(EVTCHN_FIFO_PENDING, BM(word))) {
if (evtchn_fifo_is_pending(port)) {
struct evtchn_unmask unmask = { .port = port };
(void)HYPERVISOR_event_channel_op(EVTCHNOP_unmask, &unmask);
}
@ -243,7 +263,7 @@ static void handle_irq_for_port(unsigned port)
static void consume_one_event(unsigned cpu,
struct evtchn_fifo_control_block *control_block,
unsigned priority, uint32_t *ready)
unsigned priority, unsigned long *ready)
{
struct evtchn_fifo_queue *q = &per_cpu(cpu_queue, cpu);
uint32_t head;
@ -273,10 +293,9 @@ static void consume_one_event(unsigned cpu,
* copy of the ready word.
*/
if (head == 0)
clear_bit(priority, BM(ready));
clear_bit(priority, ready);
if (sync_test_bit(EVTCHN_FIFO_PENDING, BM(word))
&& !sync_test_bit(EVTCHN_FIFO_MASKED, BM(word)))
if (evtchn_fifo_is_pending(port) && !evtchn_fifo_is_masked(port))
handle_irq_for_port(port);
q->head[priority] = head;
@ -285,7 +304,7 @@ static void consume_one_event(unsigned cpu,
static void evtchn_fifo_handle_events(unsigned cpu)
{
struct evtchn_fifo_control_block *control_block;
uint32_t ready;
unsigned long ready;
unsigned q;
control_block = per_cpu(cpu_control_block, cpu);