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xen: branch for v6.7-rc2

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Merge tag 'for-linus-6.7a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from Juergen Gross:

 - A fix in the Xen events driver avoiding the use of RCU after
   the call to rcu_report_dead() when taking a cpu down

 - A fix for running as Xen dom0 to line up ACPI's idea of power
   management capabilities with the one of Xen

 - A cleanup eliminating several kernel-doc warnings in Xen related
   code

 - A cleanup series of the Xen events driver

* tag 'for-linus-6.7a-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/events: remove some info_for_irq() calls in pirq handling
  xen/events: modify internal [un]bind interfaces
  xen/events: drop xen_allocate_irqs_dynamic()
  xen/events: remove some simple helpers from events_base.c
  xen/events: reduce externally visible helper functions
  xen/events: remove unused functions
  xen/events: fix delayed eoi list handling
  xen/shbuf: eliminate 17 kernel-doc warnings
  acpi/processor: sanitize _OSC/_PDC capabilities for Xen dom0
  xen/events: avoid using info_for_irq() in xen_send_IPI_one()
This commit is contained in:
Linus Torvalds 2023-11-16 07:44:34 -05:00
commit 6eb1acd976
8 changed files with 355 additions and 333 deletions
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14
arch/x86/include/asm/acpi.h
View file

@ -16,6 +16,9 @@
#include <asm/x86_init.h>
#include <asm/cpufeature.h>
#include <asm/irq_vectors.h>
#include <asm/xen/hypervisor.h>
#include <xen/xen.h>
#ifdef CONFIG_ACPI_APEI
# include <asm/pgtable_types.h>
@ -127,6 +130,17 @@ static inline void arch_acpi_set_proc_cap_bits(u32 *cap)
if (!cpu_has(c, X86_FEATURE_MWAIT) ||
boot_option_idle_override == IDLE_NOMWAIT)
*cap &= ~(ACPI_PROC_CAP_C_C1_FFH | ACPI_PROC_CAP_C_C2C3_FFH);
if (xen_initial_domain()) {
/*
* When Linux is running as Xen dom0, the hypervisor is the
* entity in charge of the processor power management, and so
* Xen needs to check the OS capabilities reported in the
* processor capabilities buffer matches what the hypervisor
* driver supports.
*/
xen_sanitize_proc_cap_bits(cap);
}
}
static inline bool acpi_has_cpu_in_madt(void)

9
arch/x86/include/asm/xen/hypervisor.h
View file

@ -100,4 +100,13 @@ static inline void leave_lazy(enum xen_lazy_mode mode)
enum xen_lazy_mode xen_get_lazy_mode(void);
#if defined(CONFIG_XEN_DOM0) && defined(CONFIG_ACPI)
void xen_sanitize_proc_cap_bits(uint32_t *buf);
#else
static inline void xen_sanitize_proc_cap_bits(uint32_t *buf)
{
BUG();
}
#endif
#endif /* _ASM_X86_XEN_HYPERVISOR_H */

8
drivers/xen/events/events_2l.c
View file

@ -171,11 +171,11 @@ static void evtchn_2l_handle_events(unsigned cpu, struct evtchn_loop_ctrl *ctrl)
int i;
struct shared_info *s = HYPERVISOR_shared_info;
struct vcpu_info *vcpu_info = __this_cpu_read(xen_vcpu);
evtchn_port_t evtchn;
/* Timer interrupt has highest priority. */
irq = irq_from_virq(cpu, VIRQ_TIMER);
irq = irq_evtchn_from_virq(cpu, VIRQ_TIMER, &evtchn);
if (irq != -1) {
evtchn_port_t evtchn = evtchn_from_irq(irq);
word_idx = evtchn / BITS_PER_LONG;
bit_idx = evtchn % BITS_PER_LONG;
if (active_evtchns(cpu, s, word_idx) & (1ULL << bit_idx))
@ -328,9 +328,9 @@ irqreturn_t xen_debug_interrupt(int irq, void *dev_id)
for (i = 0; i < EVTCHN_2L_NR_CHANNELS; i++) {
if (sync_test_bit(i, BM(sh->evtchn_pending))) {
int word_idx = i / BITS_PER_EVTCHN_WORD;
printk(" %d: event %d -> irq %d%s%s%s\n",
printk(" %d: event %d -> irq %u%s%s%s\n",
cpu_from_evtchn(i), i,
get_evtchn_to_irq(i),
irq_from_evtchn(i),
sync_test_bit(word_idx, BM(&v->evtchn_pending_sel))
? "" : " l2-clear",
!sync_test_bit(i, BM(sh->evtchn_mask))

592
drivers/xen/events/events_base.c
View file

File diff suppressed because it is too large Load diff

1
drivers/xen/events/events_internal.h
View file

@ -33,7 +33,6 @@ struct evtchn_ops {
extern const struct evtchn_ops *evtchn_ops;
int get_evtchn_to_irq(evtchn_port_t evtchn);
void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl);
unsigned int cpu_from_evtchn(evtchn_port_t evtchn);

22
drivers/xen/pcpu.c
View file

@ -47,6 +47,9 @@
#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>
#ifdef CONFIG_ACPI
#include <acpi/processor.h>
#endif
/*
* @cpu_id: Xen physical cpu logic number
@ -400,4 +403,23 @@ bool __init xen_processor_present(uint32_t acpi_id)
return online;
}
void xen_sanitize_proc_cap_bits(uint32_t *cap)
{
struct xen_platform_op op = {
.cmd = XENPF_set_processor_pminfo,
.u.set_pminfo.id = -1,
.u.set_pminfo.type = XEN_PM_PDC,
};
u32 buf[3] = { ACPI_PDC_REVISION_ID, 1, *cap };
int ret;
set_xen_guest_handle(op.u.set_pminfo.pdc, buf);
ret = HYPERVISOR_platform_op(&op);
if (ret)
pr_err("sanitize of _PDC buffer bits from Xen failed: %d\n",
ret);
else
*cap = buf[2];
}
#endif

34
drivers/xen/xen-front-pgdir-shbuf.c
View file

@ -21,7 +21,7 @@
#include <xen/xen-front-pgdir-shbuf.h>
/**
/*
* This structure represents the structure of a shared page
* that contains grant references to the pages of the shared
* buffer. This structure is common to many Xen para-virtualized
@ -33,7 +33,7 @@ struct xen_page_directory {
grant_ref_t gref[]; /* Variable length */
};
/**
/*
* Shared buffer ops which are differently implemented
* depending on the allocation mode, e.g. if the buffer
* is allocated by the corresponding backend or frontend.
@ -61,7 +61,7 @@ struct xen_front_pgdir_shbuf_ops {
int (*unmap)(struct xen_front_pgdir_shbuf *buf);
};
/**
/*
* Get granted reference to the very first page of the
* page directory. Usually this is passed to the backend,
* so it can find/fill the grant references to the buffer's
@ -81,7 +81,7 @@ xen_front_pgdir_shbuf_get_dir_start(struct xen_front_pgdir_shbuf *buf)
}
EXPORT_SYMBOL_GPL(xen_front_pgdir_shbuf_get_dir_start);
/**
/*
* Map granted references of the shared buffer.
*
* Depending on the shared buffer mode of allocation
@ -102,7 +102,7 @@ int xen_front_pgdir_shbuf_map(struct xen_front_pgdir_shbuf *buf)
}
EXPORT_SYMBOL_GPL(xen_front_pgdir_shbuf_map);
/**
/*
* Unmap granted references of the shared buffer.
*
* Depending on the shared buffer mode of allocation
@ -123,7 +123,7 @@ int xen_front_pgdir_shbuf_unmap(struct xen_front_pgdir_shbuf *buf)
}
EXPORT_SYMBOL_GPL(xen_front_pgdir_shbuf_unmap);
/**
/*
* Free all the resources of the shared buffer.
*
* \param buf shared buffer which resources to be freed.
@ -150,7 +150,7 @@ EXPORT_SYMBOL_GPL(xen_front_pgdir_shbuf_free);
offsetof(struct xen_page_directory, \
gref)) / sizeof(grant_ref_t))
/**
/*
* Get the number of pages the page directory consumes itself.
*
* \param buf shared buffer.
@ -160,7 +160,7 @@ static int get_num_pages_dir(struct xen_front_pgdir_shbuf *buf)
return DIV_ROUND_UP(buf->num_pages, XEN_NUM_GREFS_PER_PAGE);
}
/**
/*
* Calculate the number of grant references needed to share the buffer
* and its pages when backend allocates the buffer.
*
@ -172,7 +172,7 @@ static void backend_calc_num_grefs(struct xen_front_pgdir_shbuf *buf)
buf->num_grefs = get_num_pages_dir(buf);
}
/**
/*
* Calculate the number of grant references needed to share the buffer
* and its pages when frontend allocates the buffer.
*
@ -190,7 +190,7 @@ static void guest_calc_num_grefs(struct xen_front_pgdir_shbuf *buf)
#define xen_page_to_vaddr(page) \
((uintptr_t)pfn_to_kaddr(page_to_xen_pfn(page)))
/**
/*
* Unmap the buffer previously mapped with grant references
* provided by the backend.
*
@ -238,7 +238,7 @@ static int backend_unmap(struct xen_front_pgdir_shbuf *buf)
return ret;
}
/**
/*
* Map the buffer with grant references provided by the backend.
*
* \param buf shared buffer.
@ -320,7 +320,7 @@ static int backend_map(struct xen_front_pgdir_shbuf *buf)
return ret;
}
/**
/*
* Fill page directory with grant references to the pages of the
* page directory itself.
*
@ -350,7 +350,7 @@ static void backend_fill_page_dir(struct xen_front_pgdir_shbuf *buf)
page_dir->gref_dir_next_page = XEN_GREF_LIST_END;
}
/**
/*
* Fill page directory with grant references to the pages of the
* page directory and the buffer we share with the backend.
*
@ -389,7 +389,7 @@ static void guest_fill_page_dir(struct xen_front_pgdir_shbuf *buf)
}
}
/**
/*
* Grant references to the frontend's buffer pages.
*
* These will be shared with the backend, so it can
@ -418,7 +418,7 @@ static int guest_grant_refs_for_buffer(struct xen_front_pgdir_shbuf *buf,
return 0;
}
/**
/*
* Grant all the references needed to share the buffer.
*
* Grant references to the page directory pages and, if
@ -466,7 +466,7 @@ static int grant_references(struct xen_front_pgdir_shbuf *buf)
return 0;
}
/**
/*
* Allocate all required structures to mange shared buffer.
*
* \param buf shared buffer.
@ -506,7 +506,7 @@ static const struct xen_front_pgdir_shbuf_ops local_ops = {
.grant_refs_for_buffer = guest_grant_refs_for_buffer,
};
/**
/*
* Allocate a new instance of a shared buffer.
*
* \param cfg configuration to be used while allocating a new shared buffer.

8
include/xen/events.h
View file

@ -88,7 +88,6 @@ void xen_irq_resume(void);
/* Clear an irq's pending state, in preparation for polling on it */
void xen_clear_irq_pending(int irq);
void xen_set_irq_pending(int irq);
bool xen_test_irq_pending(int irq);
/* Poll waiting for an irq to become pending. In the usual case, the
@ -101,8 +100,8 @@ void xen_poll_irq_timeout(int irq, u64 timeout);
/* Determine the IRQ which is bound to an event channel */
unsigned int irq_from_evtchn(evtchn_port_t evtchn);
int irq_from_virq(unsigned int cpu, unsigned int virq);
evtchn_port_t evtchn_from_irq(unsigned irq);
int irq_evtchn_from_virq(unsigned int cpu, unsigned int virq,
evtchn_port_t *evtchn);
int xen_set_callback_via(uint64_t via);
int xen_evtchn_do_upcall(void);
@ -122,9 +121,6 @@ int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
/* De-allocates the above mentioned physical interrupt. */
int xen_destroy_irq(int irq);
/* Return irq from pirq */
int xen_irq_from_pirq(unsigned pirq);
/* Return the pirq allocated to the irq. */
int xen_pirq_from_irq(unsigned irq);