forked from Minki/linux
794d5b8a49
The code is unreachable for HVM or PVH, and it also makes little sense
in auto-translated environments. On Arm, with
xen_{create,destroy}_contiguous_region() both being stubs, I have a hard
time seeing what good the Xen specific variant does - the generic one
ought to be fine for all purposes there. Still Arm code explicitly
references symbols here, so the code will continue to be included there.
Instead of making PCI_XEN's "select" conditional, simply drop it -
SWIOTLB_XEN will be available unconditionally in the PV case anyway, and
is - as explained above - dead code in non-PV environments.
This in turn allows dropping the stubs for
xen_{create,destroy}_contiguous_region(), the former of which was broken
anyway - it failed to set the DMA handle output.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/5947b8ae-fdc7-225c-4838-84712265fc1e@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
228 lines
6.8 KiB
C
228 lines
6.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef INCLUDE_XEN_OPS_H
|
|
#define INCLUDE_XEN_OPS_H
|
|
|
|
#include <linux/percpu.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/efi.h>
|
|
#include <xen/features.h>
|
|
#include <asm/xen/interface.h>
|
|
#include <xen/interface/vcpu.h>
|
|
|
|
DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
|
|
|
|
DECLARE_PER_CPU(uint32_t, xen_vcpu_id);
|
|
static inline uint32_t xen_vcpu_nr(int cpu)
|
|
{
|
|
return per_cpu(xen_vcpu_id, cpu);
|
|
}
|
|
|
|
#define XEN_VCPU_ID_INVALID U32_MAX
|
|
|
|
void xen_arch_pre_suspend(void);
|
|
void xen_arch_post_suspend(int suspend_cancelled);
|
|
|
|
void xen_timer_resume(void);
|
|
void xen_arch_resume(void);
|
|
void xen_arch_suspend(void);
|
|
|
|
void xen_reboot(int reason);
|
|
|
|
void xen_resume_notifier_register(struct notifier_block *nb);
|
|
void xen_resume_notifier_unregister(struct notifier_block *nb);
|
|
|
|
bool xen_vcpu_stolen(int vcpu);
|
|
void xen_setup_runstate_info(int cpu);
|
|
void xen_time_setup_guest(void);
|
|
void xen_manage_runstate_time(int action);
|
|
void xen_get_runstate_snapshot(struct vcpu_runstate_info *res);
|
|
u64 xen_steal_clock(int cpu);
|
|
|
|
int xen_setup_shutdown_event(void);
|
|
|
|
extern unsigned long *xen_contiguous_bitmap;
|
|
|
|
#if defined(CONFIG_XEN_PV) || defined(CONFIG_ARM) || defined(CONFIG_ARM64)
|
|
int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
|
|
unsigned int address_bits,
|
|
dma_addr_t *dma_handle);
|
|
void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order);
|
|
#endif
|
|
|
|
#if defined(CONFIG_XEN_PV)
|
|
int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
|
|
xen_pfn_t *pfn, int nr, int *err_ptr, pgprot_t prot,
|
|
unsigned int domid, bool no_translate, struct page **pages);
|
|
#else
|
|
static inline int xen_remap_pfn(struct vm_area_struct *vma, unsigned long addr,
|
|
xen_pfn_t *pfn, int nr, int *err_ptr,
|
|
pgprot_t prot, unsigned int domid,
|
|
bool no_translate, struct page **pages)
|
|
{
|
|
BUG();
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
struct vm_area_struct;
|
|
|
|
#ifdef CONFIG_XEN_AUTO_XLATE
|
|
int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
|
|
unsigned long addr,
|
|
xen_pfn_t *gfn, int nr,
|
|
int *err_ptr, pgprot_t prot,
|
|
unsigned int domid,
|
|
struct page **pages);
|
|
int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
|
|
int nr, struct page **pages);
|
|
#else
|
|
/*
|
|
* These two functions are called from arch/x86/xen/mmu.c and so stubs
|
|
* are needed for a configuration not specifying CONFIG_XEN_AUTO_XLATE.
|
|
*/
|
|
static inline int xen_xlate_remap_gfn_array(struct vm_area_struct *vma,
|
|
unsigned long addr,
|
|
xen_pfn_t *gfn, int nr,
|
|
int *err_ptr, pgprot_t prot,
|
|
unsigned int domid,
|
|
struct page **pages)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
|
|
int nr, struct page **pages)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
#endif
|
|
|
|
int xen_remap_vma_range(struct vm_area_struct *vma, unsigned long addr,
|
|
unsigned long len);
|
|
|
|
/*
|
|
* xen_remap_domain_gfn_array() - map an array of foreign frames by gfn
|
|
* @vma: VMA to map the pages into
|
|
* @addr: Address at which to map the pages
|
|
* @gfn: Array of GFNs to map
|
|
* @nr: Number entries in the GFN array
|
|
* @err_ptr: Returns per-GFN error status.
|
|
* @prot: page protection mask
|
|
* @domid: Domain owning the pages
|
|
* @pages: Array of pages if this domain has an auto-translated physmap
|
|
*
|
|
* @gfn and @err_ptr may point to the same buffer, the GFNs will be
|
|
* overwritten by the error codes after they are mapped.
|
|
*
|
|
* Returns the number of successfully mapped frames, or a -ve error
|
|
* code.
|
|
*/
|
|
static inline int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
|
|
unsigned long addr,
|
|
xen_pfn_t *gfn, int nr,
|
|
int *err_ptr, pgprot_t prot,
|
|
unsigned int domid,
|
|
struct page **pages)
|
|
{
|
|
if (xen_feature(XENFEAT_auto_translated_physmap))
|
|
return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
|
|
prot, domid, pages);
|
|
|
|
/* We BUG_ON because it's a programmer error to pass a NULL err_ptr,
|
|
* and the consequences later is quite hard to detect what the actual
|
|
* cause of "wrong memory was mapped in".
|
|
*/
|
|
BUG_ON(err_ptr == NULL);
|
|
return xen_remap_pfn(vma, addr, gfn, nr, err_ptr, prot, domid,
|
|
false, pages);
|
|
}
|
|
|
|
/*
|
|
* xen_remap_domain_mfn_array() - map an array of foreign frames by mfn
|
|
* @vma: VMA to map the pages into
|
|
* @addr: Address at which to map the pages
|
|
* @mfn: Array of MFNs to map
|
|
* @nr: Number entries in the MFN array
|
|
* @err_ptr: Returns per-MFN error status.
|
|
* @prot: page protection mask
|
|
* @domid: Domain owning the pages
|
|
* @pages: Array of pages if this domain has an auto-translated physmap
|
|
*
|
|
* @mfn and @err_ptr may point to the same buffer, the MFNs will be
|
|
* overwritten by the error codes after they are mapped.
|
|
*
|
|
* Returns the number of successfully mapped frames, or a -ve error
|
|
* code.
|
|
*/
|
|
static inline int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
|
|
unsigned long addr, xen_pfn_t *mfn,
|
|
int nr, int *err_ptr,
|
|
pgprot_t prot, unsigned int domid,
|
|
struct page **pages)
|
|
{
|
|
if (xen_feature(XENFEAT_auto_translated_physmap))
|
|
return -EOPNOTSUPP;
|
|
|
|
return xen_remap_pfn(vma, addr, mfn, nr, err_ptr, prot, domid,
|
|
true, pages);
|
|
}
|
|
|
|
/* xen_remap_domain_gfn_range() - map a range of foreign frames
|
|
* @vma: VMA to map the pages into
|
|
* @addr: Address at which to map the pages
|
|
* @gfn: First GFN to map.
|
|
* @nr: Number frames to map
|
|
* @prot: page protection mask
|
|
* @domid: Domain owning the pages
|
|
* @pages: Array of pages if this domain has an auto-translated physmap
|
|
*
|
|
* Returns the number of successfully mapped frames, or a -ve error
|
|
* code.
|
|
*/
|
|
static inline int xen_remap_domain_gfn_range(struct vm_area_struct *vma,
|
|
unsigned long addr,
|
|
xen_pfn_t gfn, int nr,
|
|
pgprot_t prot, unsigned int domid,
|
|
struct page **pages)
|
|
{
|
|
if (xen_feature(XENFEAT_auto_translated_physmap))
|
|
return -EOPNOTSUPP;
|
|
|
|
return xen_remap_pfn(vma, addr, &gfn, nr, NULL, prot, domid, false,
|
|
pages);
|
|
}
|
|
|
|
int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
|
|
int numpgs, struct page **pages);
|
|
|
|
int xen_xlate_map_ballooned_pages(xen_pfn_t **pfns, void **vaddr,
|
|
unsigned long nr_grant_frames);
|
|
|
|
bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
|
|
|
|
void xen_efi_runtime_setup(void);
|
|
|
|
|
|
#if defined(CONFIG_XEN_PV) && !defined(CONFIG_PREEMPTION)
|
|
|
|
DECLARE_PER_CPU(bool, xen_in_preemptible_hcall);
|
|
|
|
static inline void xen_preemptible_hcall_begin(void)
|
|
{
|
|
__this_cpu_write(xen_in_preemptible_hcall, true);
|
|
}
|
|
|
|
static inline void xen_preemptible_hcall_end(void)
|
|
{
|
|
__this_cpu_write(xen_in_preemptible_hcall, false);
|
|
}
|
|
|
|
#else
|
|
|
|
static inline void xen_preemptible_hcall_begin(void) { }
|
|
static inline void xen_preemptible_hcall_end(void) { }
|
|
|
|
#endif /* CONFIG_XEN_PV && !CONFIG_PREEMPTION */
|
|
|
|
#endif /* INCLUDE_XEN_OPS_H */
|