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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-16 13:51:34 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-16 13:51:34 -0800 |
commit | 007c74e16c1aac9f5c93b372a054f7f11ede8628 (patch) | |
tree | bcd838d799379a1289160183674ea485c7dc4154 /include | |
parent | 009bd55dfcc857d8b00a5bbb17a8db060317af6f (diff) | |
parent | e998879d4fb7991856916972168cf27c0d86ed12 (diff) | |
download | linux-007c74e16c1aac9f5c93b372a054f7f11ede8628.tar.bz2 |
Merge branch 'stable/for-linus-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb
Pull swiotlb update from Konrad Rzeszutek Wilk:
"A generic (but for right now engaged only with AMD SEV) mechanism to
adjust a larger size SWIOTLB based on the total memory of the SEV
guests which right now require the bounce buffer for interacting with
the outside world.
Normal knobs (swiotlb=XYZ) still work"
* 'stable/for-linus-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
x86,swiotlb: Adjust SWIOTLB bounce buffer size for SEV guests
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/swiotlb.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index fbdc65782195..d9c9fc9ca5d2 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -30,6 +30,9 @@ enum swiotlb_force { */ #define IO_TLB_SHIFT 11 +/* default to 64MB */ +#define IO_TLB_DEFAULT_SIZE (64UL<<20) + extern void swiotlb_init(int verbose); int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); extern unsigned long swiotlb_nr_tbl(void); @@ -78,6 +81,7 @@ void __init swiotlb_exit(void); unsigned int swiotlb_max_segment(void); size_t swiotlb_max_mapping_size(struct device *dev); bool is_swiotlb_active(void); +void __init swiotlb_adjust_size(unsigned long new_size); #else #define swiotlb_force SWIOTLB_NO_FORCE static inline bool is_swiotlb_buffer(phys_addr_t paddr) @@ -100,6 +104,10 @@ static inline bool is_swiotlb_active(void) { return false; } + +static inline void swiotlb_adjust_size(unsigned long new_size) +{ +} #endif /* CONFIG_SWIOTLB */ extern void swiotlb_print_info(void); |