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Content preview: This change adds a simple implementation of sbi_memalign(), for future use in allocating aligned memory for SMMTT tables. --- include/sbi/sbi_heap.h | 5 +++++ lib/sbi/sbi_heap.c | 37 +++++++++++++++++ [...] Content analysis details: (-1.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:52c listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [gregorhaas1997(at)gmail.com] 0.2 FREEMAIL_ENVFROM_END_DIGIT Envelope-from freemail username ends in digit [gregorhaas1997(at)gmail.com] X-BeenThere: opensbi@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "opensbi" Errors-To: opensbi-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org This change adds a simple implementation of sbi_memalign(), for future use in allocating aligned memory for SMMTT tables. --- include/sbi/sbi_heap.h | 5 +++++ lib/sbi/sbi_heap.c | 37 ++++++++++++++++++++++++++++++++++--- 2 files changed, 39 insertions(+), 3 deletions(-) diff --git a/include/sbi/sbi_heap.h b/include/sbi/sbi_heap.h index a3f5a0c..468ad11 100644 --- a/include/sbi/sbi_heap.h +++ b/include/sbi/sbi_heap.h @@ -24,6 +24,11 @@ struct sbi_scratch; void *sbi_malloc(size_t size); void *sbi_malloc_from(struct heap_control *hpctrl, size_t size); +/** Allocate aligned from heap area */ +void *sbi_memalign(size_t alignment, size_t size); +void *sbi_memalign_from(struct heap_control *hpctrl, size_t alignment, + size_t size); + /** Zero allocate from heap area */ void *sbi_zalloc(size_t size); void *sbi_zalloc_from(struct heap_control *hpctrl, size_t size); diff --git a/lib/sbi/sbi_heap.c b/lib/sbi/sbi_heap.c index 3be56f3..af18692 100644 --- a/lib/sbi/sbi_heap.c +++ b/lib/sbi/sbi_heap.c @@ -37,7 +37,8 @@ struct heap_control { static struct heap_control global_hpctrl; -void *sbi_malloc_from(struct heap_control *hpctrl, size_t size) +static void *alloc_with_align(struct heap_control *hpctrl, + size_t align, size_t size) { void *ret = NULL; struct heap_node *n, *np; @@ -45,8 +46,8 @@ void *sbi_malloc_from(struct heap_control *hpctrl, size_t size) if (!size) return NULL; - size += HEAP_ALLOC_ALIGN - 1; - size &= ~((unsigned long)HEAP_ALLOC_ALIGN - 1); + size += align - 1; + size &= ~((unsigned long)align - 1); spin_lock(&hpctrl->lock); @@ -80,11 +81,41 @@ void *sbi_malloc_from(struct heap_control *hpctrl, size_t size) return ret; } +void *sbi_malloc_from(struct heap_control *hpctrl, size_t size) +{ + return alloc_with_align(hpctrl, HEAP_ALLOC_ALIGN, size); +} + void *sbi_malloc(size_t size) { return sbi_malloc_from(&global_hpctrl, size); } +void *sbi_memalign_from(struct heap_control *hpctrl, size_t alignment, + size_t size) +{ + if(alignment < HEAP_ALLOC_ALIGN) { + alignment = HEAP_ALLOC_ALIGN; + } + + // Make sure alignment is power of two + if((alignment & (alignment - 1)) != 0) { + return NULL; + } + + // Make sure size is multiple of alignment + if(size % alignment != 0) { + return NULL; + } + + return alloc_with_align(hpctrl, alignment, size); +} + +void *sbi_memalign(size_t alignment, size_t size) +{ + return sbi_memalign_from(&global_hpctrl, alignment, size); +} + void *sbi_zalloc_from(struct heap_control *hpctrl, size_t size) { void *ret = sbi_malloc_from(hpctrl, size);