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UPSTREAM: arm64/sme: Implement vector length configuration prctl()s

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As for SVE provide a prctl() interface which allows processes to
configure their SME vector length.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220419112247.711548-12-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit 9e4ab6c89109472082616f8d2f6ada7deaffe161)
Signed-off-by: Will Deacon <willdeacon@google.com>
Bug: 233587962
Bug: 233588291
Change-Id: I99b778aea77b19bac68f1ddb61d77b51f64b49cb
This commit is contained in:
Mark Brown
2022-04-19 12:22:19 +01:00
committed by Will Deacon
parent 0bb489959e
commit 12efc92c13
6 changed files with 61 additions and 1 deletions
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4
arch/arm64/include/asm/processor.h
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@@ -358,9 +358,11 @@ extern void __init minsigstksz_setup(void);
*/
#include <asm/fpsimd.h>
/* Userspace interface for PR_SVE_{SET,GET}_VL prctl()s: */
/* Userspace interface for PR_S[MV]E_{SET,GET}_VL prctl()s: */
#define SVE_SET_VL(arg) sve_set_current_vl(arg)
#define SVE_GET_VL() sve_get_current_vl()
#define SME_SET_VL(arg) sme_set_current_vl(arg)
#define SME_GET_VL() sme_get_current_vl()
/* PR_PAC_RESET_KEYS prctl */
#define PAC_RESET_KEYS(tsk, arg) ptrauth_prctl_reset_keys(tsk, arg)