From 8c79bfa51101354853f0f5d3b02435cec429da51 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 16 Aug 2012 20:35:41 -0700 Subject: [PATCH] sparc64: Add hypervisor interfaces for SPARC-T4 perf counter access. Unlike for previous chips, access to the perf-counter control registers are all hyper-privileged. Therefore, access to them must go through a hypervisor interface. Signed-off-by: David S. Miller --- arch/sparc/include/asm/hypervisor.h | 11 +++++++++++ arch/sparc/kernel/hvapi.c | 1 + arch/sparc/kernel/hvcalls.S | 16 ++++++++++++++++ 3 files changed, 28 insertions(+) diff --git a/arch/sparc/include/asm/hypervisor.h b/arch/sparc/include/asm/hypervisor.h index 015a761eaa3..ca121f0fa3e 100644 --- a/arch/sparc/include/asm/hypervisor.h +++ b/arch/sparc/include/asm/hypervisor.h @@ -2934,6 +2934,16 @@ extern unsigned long sun4v_reboot_data_set(unsigned long ra, unsigned long len); #endif +#define HV_FAST_VT_GET_PERFREG 0x184 +#define HV_FAST_VT_SET_PERFREG 0x185 + +#ifndef __ASSEMBLY__ +extern unsigned long sun4v_vt_get_perfreg(unsigned long reg_num, + unsigned long *reg_val); +extern unsigned long sun4v_vt_set_perfreg(unsigned long reg_num, + unsigned long reg_val); +#endif + /* Function numbers for HV_CORE_TRAP. */ #define HV_CORE_SET_VER 0x00 #define HV_CORE_PUTCHAR 0x01 @@ -2964,6 +2974,7 @@ extern unsigned long sun4v_reboot_data_set(unsigned long ra, #define HV_GRP_NIU 0x0204 #define HV_GRP_VF_CPU 0x0205 #define HV_GRP_KT_CPU 0x0209 +#define HV_GRP_VT_CPU 0x020c #define HV_GRP_DIAG 0x0300 #ifndef __ASSEMBLY__ diff --git a/arch/sparc/kernel/hvapi.c b/arch/sparc/kernel/hvapi.c index 8593672838f..1032df43ec9 100644 --- a/arch/sparc/kernel/hvapi.c +++ b/arch/sparc/kernel/hvapi.c @@ -45,6 +45,7 @@ static struct api_info api_table[] = { { .group = HV_GRP_NIU, }, { .group = HV_GRP_VF_CPU, }, { .group = HV_GRP_KT_CPU, }, + { .group = HV_GRP_VT_CPU, }, { .group = HV_GRP_DIAG, .flags = FLAG_PRE_API }, }; diff --git a/arch/sparc/kernel/hvcalls.S b/arch/sparc/kernel/hvcalls.S index 58d60de4d65..f3ab509b76a 100644 --- a/arch/sparc/kernel/hvcalls.S +++ b/arch/sparc/kernel/hvcalls.S @@ -805,3 +805,19 @@ ENTRY(sun4v_reboot_data_set) retl nop ENDPROC(sun4v_reboot_data_set) + +ENTRY(sun4v_vt_get_perfreg) + mov %o1, %o4 + mov HV_FAST_VT_GET_PERFREG, %o5 + ta HV_FAST_TRAP + stx %o1, [%o4] + retl + nop +ENDPROC(sun4v_vt_get_perfreg) + +ENTRY(sun4v_vt_set_perfreg) + mov HV_FAST_VT_SET_PERFREG, %o5 + ta HV_FAST_TRAP + retl + nop +ENDPROC(sun4v_vt_set_perfreg) -- 2.46.0