Commit 6cd3d401 authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'for-linus-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from Juergen Gross:

 - a cleanup patch removing an unused function

 - a small fix for the xen pciback driver

 - a series for making the unwinder hyppay with the Xen PV guest idle
   task stacks

* tag 'for-linus-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  x86/xen: Make the secondary CPU idle tasks reliable
  x86/xen: Make the boot CPU idle task reliable
  xen-pciback: fix INTERRUPT_TYPE_* defines
  xen/xenbus: remove unused xenbus_map_ring()
parents 0adb8bc0 c3881eb5
...@@ -53,6 +53,7 @@ static DEFINE_PER_CPU(struct xen_common_irq, xen_irq_work) = { .irq = -1 }; ...@@ -53,6 +53,7 @@ static DEFINE_PER_CPU(struct xen_common_irq, xen_irq_work) = { .irq = -1 };
static DEFINE_PER_CPU(struct xen_common_irq, xen_pmu_irq) = { .irq = -1 }; static DEFINE_PER_CPU(struct xen_common_irq, xen_pmu_irq) = { .irq = -1 };
static irqreturn_t xen_irq_work_interrupt(int irq, void *dev_id); static irqreturn_t xen_irq_work_interrupt(int irq, void *dev_id);
void asm_cpu_bringup_and_idle(void);
static void cpu_bringup(void) static void cpu_bringup(void)
{ {
...@@ -309,7 +310,7 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle) ...@@ -309,7 +310,7 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
* pointing just below where pt_regs would be if it were a normal * pointing just below where pt_regs would be if it were a normal
* kernel entry. * kernel entry.
*/ */
ctxt->user_regs.eip = (unsigned long)cpu_bringup_and_idle; ctxt->user_regs.eip = (unsigned long)asm_cpu_bringup_and_idle;
ctxt->flags = VGCF_IN_KERNEL; ctxt->flags = VGCF_IN_KERNEL;
ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */ ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */
ctxt->user_regs.ds = __USER_DS; ctxt->user_regs.ds = __USER_DS;
......
...@@ -35,7 +35,11 @@ SYM_CODE_START(startup_xen) ...@@ -35,7 +35,11 @@ SYM_CODE_START(startup_xen)
rep __ASM_SIZE(stos) rep __ASM_SIZE(stos)
mov %_ASM_SI, xen_start_info mov %_ASM_SI, xen_start_info
mov $init_thread_union+THREAD_SIZE, %_ASM_SP #ifdef CONFIG_X86_64
mov initial_stack(%rip), %rsp
#else
mov pa(initial_stack), %esp
#endif
#ifdef CONFIG_X86_64 #ifdef CONFIG_X86_64
/* Set up %gs. /* Set up %gs.
...@@ -51,9 +55,19 @@ SYM_CODE_START(startup_xen) ...@@ -51,9 +55,19 @@ SYM_CODE_START(startup_xen)
wrmsr wrmsr
#endif #endif
jmp xen_start_kernel call xen_start_kernel
SYM_CODE_END(startup_xen) SYM_CODE_END(startup_xen)
__FINIT __FINIT
#ifdef CONFIG_XEN_PV_SMP
.pushsection .text
SYM_CODE_START(asm_cpu_bringup_and_idle)
UNWIND_HINT_EMPTY
call cpu_bringup_and_idle
SYM_CODE_END(asm_cpu_bringup_and_idle)
.popsection
#endif
#endif #endif
.pushsection .text .pushsection .text
......
...@@ -320,7 +320,7 @@ int xen_pcibk_get_interrupt_type(struct pci_dev *dev) ...@@ -320,7 +320,7 @@ int xen_pcibk_get_interrupt_type(struct pci_dev *dev)
if (val & PCI_MSIX_FLAGS_ENABLE) if (val & PCI_MSIX_FLAGS_ENABLE)
ret |= INTERRUPT_TYPE_MSIX; ret |= INTERRUPT_TYPE_MSIX;
} }
return ret; return ret ?: INTERRUPT_TYPE_NONE;
} }
void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev) void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev)
......
...@@ -65,10 +65,10 @@ struct config_field_entry { ...@@ -65,10 +65,10 @@ struct config_field_entry {
void *data; void *data;
}; };
#define INTERRUPT_TYPE_NONE (1<<0) #define INTERRUPT_TYPE_NONE (0)
#define INTERRUPT_TYPE_INTX (1<<1) #define INTERRUPT_TYPE_INTX (1<<0)
#define INTERRUPT_TYPE_MSI (1<<2) #define INTERRUPT_TYPE_MSI (1<<1)
#define INTERRUPT_TYPE_MSIX (1<<3) #define INTERRUPT_TYPE_MSIX (1<<2)
extern bool xen_pcibk_permissive; extern bool xen_pcibk_permissive;
......
...@@ -517,6 +517,48 @@ static int __xenbus_map_ring(struct xenbus_device *dev, ...@@ -517,6 +517,48 @@ static int __xenbus_map_ring(struct xenbus_device *dev,
return err; return err;
} }
/**
* xenbus_unmap_ring
* @dev: xenbus device
* @handles: grant handle array
* @nr_handles: number of handles in the array
* @vaddrs: addresses to unmap
*
* Unmap memory in this domain that was imported from another domain.
* Returns 0 on success and returns GNTST_* on error
* (see xen/include/interface/grant_table.h).
*/
static int xenbus_unmap_ring(struct xenbus_device *dev, grant_handle_t *handles,
unsigned int nr_handles, unsigned long *vaddrs)
{
struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_GRANTS];
int i;
int err;
if (nr_handles > XENBUS_MAX_RING_GRANTS)
return -EINVAL;
for (i = 0; i < nr_handles; i++)
gnttab_set_unmap_op(&unmap[i], vaddrs[i],
GNTMAP_host_map, handles[i]);
if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i))
BUG();
err = GNTST_okay;
for (i = 0; i < nr_handles; i++) {
if (unmap[i].status != GNTST_okay) {
xenbus_dev_error(dev, unmap[i].status,
"unmapping page at handle %d error %d",
handles[i], unmap[i].status);
err = unmap[i].status;
break;
}
}
return err;
}
struct map_ring_valloc_hvm struct map_ring_valloc_hvm
{ {
unsigned int idx; unsigned int idx;
...@@ -608,45 +650,6 @@ static int xenbus_map_ring_valloc_hvm(struct xenbus_device *dev, ...@@ -608,45 +650,6 @@ static int xenbus_map_ring_valloc_hvm(struct xenbus_device *dev,
return err; return err;
} }
/**
* xenbus_map_ring
* @dev: xenbus device
* @gnt_refs: grant reference array
* @nr_grefs: number of grant reference
* @handles: pointer to grant handle to be filled
* @vaddrs: addresses to be mapped to
* @leaked: fail to clean up a failed map, caller should not free vaddr
*
* Map pages of memory into this domain from another domain's grant table.
* xenbus_map_ring does not allocate the virtual address space (you must do
* this yourself!). It only maps in the pages to the specified address.
* Returns 0 on success, and GNTST_* (see xen/include/interface/grant_table.h)
* or -ENOMEM / -EINVAL on error. If an error is returned, device will switch to
* XenbusStateClosing and the first error message will be saved in XenStore.
* Further more if we fail to map the ring, caller should check @leaked.
* If @leaked is not zero it means xenbus_map_ring fails to clean up, caller
* should not free the address space of @vaddr.
*/
int xenbus_map_ring(struct xenbus_device *dev, grant_ref_t *gnt_refs,
unsigned int nr_grefs, grant_handle_t *handles,
unsigned long *vaddrs, bool *leaked)
{
phys_addr_t phys_addrs[XENBUS_MAX_RING_GRANTS];
int i;
if (nr_grefs > XENBUS_MAX_RING_GRANTS)
return -EINVAL;
for (i = 0; i < nr_grefs; i++)
phys_addrs[i] = (unsigned long)vaddrs[i];
return __xenbus_map_ring(dev, gnt_refs, nr_grefs, handles,
phys_addrs, GNTMAP_host_map, leaked);
}
EXPORT_SYMBOL_GPL(xenbus_map_ring);
/** /**
* xenbus_unmap_ring_vfree * xenbus_unmap_ring_vfree
* @dev: xenbus device * @dev: xenbus device
...@@ -858,51 +861,6 @@ static int xenbus_unmap_ring_vfree_hvm(struct xenbus_device *dev, void *vaddr) ...@@ -858,51 +861,6 @@ static int xenbus_unmap_ring_vfree_hvm(struct xenbus_device *dev, void *vaddr)
return rv; return rv;
} }
/**
* xenbus_unmap_ring
* @dev: xenbus device
* @handles: grant handle array
* @nr_handles: number of handles in the array
* @vaddrs: addresses to unmap
*
* Unmap memory in this domain that was imported from another domain.
* Returns 0 on success and returns GNTST_* on error
* (see xen/include/interface/grant_table.h).
*/
int xenbus_unmap_ring(struct xenbus_device *dev,
grant_handle_t *handles, unsigned int nr_handles,
unsigned long *vaddrs)
{
struct gnttab_unmap_grant_ref unmap[XENBUS_MAX_RING_GRANTS];
int i;
int err;
if (nr_handles > XENBUS_MAX_RING_GRANTS)
return -EINVAL;
for (i = 0; i < nr_handles; i++)
gnttab_set_unmap_op(&unmap[i], vaddrs[i],
GNTMAP_host_map, handles[i]);
if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap, i))
BUG();
err = GNTST_okay;
for (i = 0; i < nr_handles; i++) {
if (unmap[i].status != GNTST_okay) {
xenbus_dev_error(dev, unmap[i].status,
"unmapping page at handle %d error %d",
handles[i], unmap[i].status);
err = unmap[i].status;
break;
}
}
return err;
}
EXPORT_SYMBOL_GPL(xenbus_unmap_ring);
/** /**
* xenbus_read_driver_state * xenbus_read_driver_state
* @path: path for driver * @path: path for driver
......
...@@ -209,15 +209,8 @@ int xenbus_grant_ring(struct xenbus_device *dev, void *vaddr, ...@@ -209,15 +209,8 @@ int xenbus_grant_ring(struct xenbus_device *dev, void *vaddr,
unsigned int nr_pages, grant_ref_t *grefs); unsigned int nr_pages, grant_ref_t *grefs);
int xenbus_map_ring_valloc(struct xenbus_device *dev, grant_ref_t *gnt_refs, int xenbus_map_ring_valloc(struct xenbus_device *dev, grant_ref_t *gnt_refs,
unsigned int nr_grefs, void **vaddr); unsigned int nr_grefs, void **vaddr);
int xenbus_map_ring(struct xenbus_device *dev,
grant_ref_t *gnt_refs, unsigned int nr_grefs,
grant_handle_t *handles, unsigned long *vaddrs,
bool *leaked);
int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr); int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr);
int xenbus_unmap_ring(struct xenbus_device *dev,
grant_handle_t *handles, unsigned int nr_handles,
unsigned long *vaddrs);
int xenbus_alloc_evtchn(struct xenbus_device *dev, int *port); int xenbus_alloc_evtchn(struct xenbus_device *dev, int *port);
int xenbus_free_evtchn(struct xenbus_device *dev, int port); int xenbus_free_evtchn(struct xenbus_device *dev, int port);
......
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