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arm64: Scalable Vector Extension (SVE) support.

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Change-Id: I3568687913f583edfaa297d5cf5ac91d319d97e9
This commit is contained in:
Shiratori, Takehiro
2019-02-21 11:29:33 +09:00
committed by Masamichi Takagi
parent dac99f708c
commit 07aa96ef95
15 changed files with 490 additions and 223 deletions
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46
arch/arm64/kernel/coredump.c
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@@ -1,7 +1,11 @@
/* coredump.c COPYRIGHT FUJITSU LIMITED 2015-2016 */
/* coredump.c COPYRIGHT FUJITSU LIMITED 2015-2019 */
#include <process.h>
#include <elfcore.h>
#include <string.h>
#include <ptrace.h>
#include <cls.h>
#define align32(x) ((((x) + 3) / 4) * 4)
void arch_fill_prstatus(struct elf_prstatus64 *prstatus, struct thread *thread, void *regs0)
{
@@ -30,3 +34,43 @@ void arch_fill_prstatus(struct elf_prstatus64 *prstatus, struct thread *thread,
/* copy unaligned prstatus addr */
memcpy(prstatus, &tmp_prstatus, sizeof(*prstatus));
}
int arch_get_thread_core_info_size(void)
{
const struct user_regset_view *view = current_user_regset_view();
const struct user_regset *regset = find_regset(view, NT_ARM_SVE);
return sizeof(struct note) + align32(sizeof("LINUX"))
+ regset_size(cpu_local_var(current), regset);
}
void arch_fill_thread_core_info(struct note *head,
struct thread *thread, void *regs)
{
const struct user_regset_view *view = current_user_regset_view();
const struct user_regset *regset = find_regset(view, NT_ARM_SVE);
/* pre saved registers */
save_fp_regs(thread);
if (regset->core_note_type && regset->get &&
(!regset->active || regset->active(thread, regset))) {
int ret;
size_t size = regset_size(thread, regset);
void *namep;
void *descp;
namep = (void *) (head + 1);
descp = namep + align32(sizeof("LINUX"));
ret = regset->get(thread, regset, 0, size, descp, NULL);
if (ret) {
return;
}
head->namesz = sizeof("LINUX");
head->descsz = size;
head->type = NT_ARM_SVE;
memcpy(namep, "LINUX", sizeof("LINUX"));
}
}