D43308.id144038.diff
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D43308.id144038.diff
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	diff --git a/sys/arm64/arm64/sys_machdep.c b/sys/arm64/arm64/sys_machdep.c
	--- a/sys/arm64/arm64/sys_machdep.c
	+++ b/sys/arm64/arm64/sys_machdep.c
	@@ -28,6 +28,7 @@
	*/

	#include <sys/param.h>
	+#include <sys/proc.h>
	#include <sys/systm.h>
	#include <sys/proc.h>
	#include <sys/sysproto.h>
	@@ -36,14 +37,19 @@
	#include <vm/pmap.h>
	#include <vm/vm_map.h>

	+#include <machine/pcb.h>
	#include <machine/sysarch.h>
	#include <machine/vmparam.h>

	+#include <security/audit/audit.h>
	+
	int
	sysarch(struct thread td, struct sysarch_args uap)
	{
	struct arm64_guard_page_args gp_args;
	+ struct pcb *pcb;
	vm_offset_t eva;
	+ unsigned long sve_len;
	int error;

	switch (uap->op) {
	@@ -73,6 +79,13 @@
	error = pmap_bti_set(vmspace_pmap(td->td_proc->p_vmspace),
	trunc_page(gp_args.addr), round_page(eva));
	break;
	+ case ARM64_GET_SVE_VL:
	+ pcb = td->td_pcb;
	+ sve_len = pcb->pcb_sve_len;
	+ error = EINVAL;
	+ if (sve_len != 0)
	+ error = copyout(&sve_len, uap->parms, sizeof(sve_len));
	+ break;
	default:
	error = EINVAL;
	break;
	diff --git a/sys/arm64/include/sysarch.h b/sys/arm64/include/sysarch.h
	--- a/sys/arm64/include/sysarch.h
	+++ b/sys/arm64/include/sysarch.h
	@@ -46,6 +46,9 @@
	__size_t len;
	};

	+#define ARM64_GET_SVE_VL 0x200
	+/* Reserved ARM64_SET_SVE_VL 0x201 */
	+
	#ifndef _KERNEL

	__BEGIN_DECLS