mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
4e8c0c8c4b
Make the IOCTL_PRIVCMD_MMAPBATCH_V2 (and older V1 version) map
multiple frames at a time rather than one at a time, despite the pages
being non-consecutive GFNs.
xen_remap_foreign_mfn_array() is added which maps an array of GFNs
(instead of a consecutive range of GFNs).
Since per-frame errors are returned in an array, privcmd must set the
MMAPBATCH_V1 error bits as part of the "report errors" phase, after
all the frames are mapped.
Migrate times are significantly improved (when using a PV toolstack
domain). For example, for an idle 12 GiB PV guest:
Before After
real 0m38.179s 0m26.868s
user 0m15.096s 0m13.652s
sys 0m28.988s 0m18.732s
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
#ifndef INCLUDE_XEN_OPS_H
|
|
#define INCLUDE_XEN_OPS_H
|
|
|
|
#include <linux/percpu.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/efi.h>
|
|
#include <asm/xen/interface.h>
|
|
|
|
DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
|
|
|
|
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_resume_notifier_register(struct notifier_block *nb);
|
|
void xen_resume_notifier_unregister(struct notifier_block *nb);
|
|
|
|
int xen_setup_shutdown_event(void);
|
|
|
|
extern unsigned long *xen_contiguous_bitmap;
|
|
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);
|
|
|
|
struct vm_area_struct;
|
|
|
|
/*
|
|
* xen_remap_domain_mfn_array() - map an array of foreign frames
|
|
* @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.
|
|
*/
|
|
int xen_remap_domain_mfn_array(struct vm_area_struct *vma,
|
|
unsigned long addr,
|
|
xen_pfn_t *gfn, int nr,
|
|
int *err_ptr, pgprot_t prot,
|
|
unsigned domid,
|
|
struct page **pages);
|
|
|
|
/* xen_remap_domain_mfn_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.
|
|
*/
|
|
int xen_remap_domain_mfn_range(struct vm_area_struct *vma,
|
|
unsigned long addr,
|
|
xen_pfn_t gfn, int nr,
|
|
pgprot_t prot, unsigned domid,
|
|
struct page **pages);
|
|
int xen_unmap_domain_mfn_range(struct vm_area_struct *vma,
|
|
int numpgs, struct page **pages);
|
|
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 domid,
|
|
struct page **pages);
|
|
int xen_xlate_unmap_gfn_range(struct vm_area_struct *vma,
|
|
int nr, struct page **pages);
|
|
|
|
bool xen_running_on_version_or_later(unsigned int major, unsigned int minor);
|
|
|
|
#ifdef CONFIG_XEN_EFI
|
|
extern efi_system_table_t *xen_efi_probe(void);
|
|
#else
|
|
static inline efi_system_table_t __init *xen_efi_probe(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PREEMPT
|
|
|
|
static inline void xen_preemptible_hcall_begin(void)
|
|
{
|
|
}
|
|
|
|
static inline void xen_preemptible_hcall_end(void)
|
|
{
|
|
}
|
|
|
|
#else
|
|
|
|
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);
|
|
}
|
|
|
|
#endif /* CONFIG_PREEMPT */
|
|
|
|
#endif /* INCLUDE_XEN_OPS_H */
|