linux_dsm_epyc7002/arch/powerpc/include/asm/plpar_wrappers.h
Aneesh Kumar K.V 4ad90c8649 powerpc/mm: Use H_READ with H_READ_4
This will bulk read 4 hash pte slot entries and should reduce the loop

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-12-14 15:19:17 +11:00

344 lines
8.4 KiB
C

#ifndef _ASM_POWERPC_PLPAR_WRAPPERS_H
#define _ASM_POWERPC_PLPAR_WRAPPERS_H
#include <linux/string.h>
#include <linux/irqflags.h>
#include <asm/hvcall.h>
#include <asm/paca.h>
#include <asm/page.h>
/* Get state of physical CPU from query_cpu_stopped */
int smp_query_cpu_stopped(unsigned int pcpu);
#define QCSS_STOPPED 0
#define QCSS_STOPPING 1
#define QCSS_NOT_STOPPED 2
#define QCSS_HARDWARE_ERROR -1
#define QCSS_HARDWARE_BUSY -2
static inline long poll_pending(void)
{
return plpar_hcall_norets(H_POLL_PENDING);
}
static inline u8 get_cede_latency_hint(void)
{
return get_lppaca()->cede_latency_hint;
}
static inline void set_cede_latency_hint(u8 latency_hint)
{
get_lppaca()->cede_latency_hint = latency_hint;
}
static inline long cede_processor(void)
{
return plpar_hcall_norets(H_CEDE);
}
static inline long extended_cede_processor(unsigned long latency_hint)
{
long rc;
u8 old_latency_hint = get_cede_latency_hint();
set_cede_latency_hint(latency_hint);
rc = cede_processor();
#ifdef CONFIG_TRACE_IRQFLAGS
/* Ensure that H_CEDE returns with IRQs on */
if (WARN_ON(!(mfmsr() & MSR_EE)))
__hard_irq_enable();
#endif
set_cede_latency_hint(old_latency_hint);
return rc;
}
static inline long vpa_call(unsigned long flags, unsigned long cpu,
unsigned long vpa)
{
flags = flags << H_VPA_FUNC_SHIFT;
return plpar_hcall_norets(H_REGISTER_VPA, flags, cpu, vpa);
}
static inline long unregister_vpa(unsigned long cpu)
{
return vpa_call(H_VPA_DEREG_VPA, cpu, 0);
}
static inline long register_vpa(unsigned long cpu, unsigned long vpa)
{
return vpa_call(H_VPA_REG_VPA, cpu, vpa);
}
static inline long unregister_slb_shadow(unsigned long cpu)
{
return vpa_call(H_VPA_DEREG_SLB, cpu, 0);
}
static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
{
return vpa_call(H_VPA_REG_SLB, cpu, vpa);
}
static inline long unregister_dtl(unsigned long cpu)
{
return vpa_call(H_VPA_DEREG_DTL, cpu, 0);
}
static inline long register_dtl(unsigned long cpu, unsigned long vpa)
{
return vpa_call(H_VPA_REG_DTL, cpu, vpa);
}
static inline long plpar_page_set_loaned(unsigned long vpa)
{
unsigned long cmo_page_sz = cmo_get_page_size();
long rc = 0;
int i;
for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa + i, 0);
for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE,
vpa + i - cmo_page_sz, 0);
return rc;
}
static inline long plpar_page_set_active(unsigned long vpa)
{
unsigned long cmo_page_sz = cmo_get_page_size();
long rc = 0;
int i;
for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa + i, 0);
for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED,
vpa + i - cmo_page_sz, 0);
return rc;
}
extern void vpa_init(int cpu);
static inline long plpar_pte_enter(unsigned long flags,
unsigned long hpte_group, unsigned long hpte_v,
unsigned long hpte_r, unsigned long *slot)
{
long rc;
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
rc = plpar_hcall(H_ENTER, retbuf, flags, hpte_group, hpte_v, hpte_r);
*slot = retbuf[0];
return rc;
}
static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex,
unsigned long avpn, unsigned long *old_pteh_ret,
unsigned long *old_ptel_ret)
{
long rc;
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
rc = plpar_hcall(H_REMOVE, retbuf, flags, ptex, avpn);
*old_pteh_ret = retbuf[0];
*old_ptel_ret = retbuf[1];
return rc;
}
/* plpar_pte_remove_raw can be called in real mode. It calls plpar_hcall_raw */
static inline long plpar_pte_remove_raw(unsigned long flags, unsigned long ptex,
unsigned long avpn, unsigned long *old_pteh_ret,
unsigned long *old_ptel_ret)
{
long rc;
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
rc = plpar_hcall_raw(H_REMOVE, retbuf, flags, ptex, avpn);
*old_pteh_ret = retbuf[0];
*old_ptel_ret = retbuf[1];
return rc;
}
static inline long plpar_pte_read(unsigned long flags, unsigned long ptex,
unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
{
long rc;
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
rc = plpar_hcall(H_READ, retbuf, flags, ptex);
*old_pteh_ret = retbuf[0];
*old_ptel_ret = retbuf[1];
return rc;
}
/* plpar_pte_read_raw can be called in real mode. It calls plpar_hcall_raw */
static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex,
unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
{
long rc;
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
rc = plpar_hcall_raw(H_READ, retbuf, flags, ptex);
*old_pteh_ret = retbuf[0];
*old_ptel_ret = retbuf[1];
return rc;
}
/*
* ptes must be 8*sizeof(unsigned long)
*/
static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex,
unsigned long *ptes)
{
long rc;
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
rc = plpar_hcall9(H_READ, retbuf, flags | H_READ_4, ptex);
memcpy(ptes, retbuf, 8*sizeof(unsigned long));
return rc;
}
/*
* plpar_pte_read_4_raw can be called in real mode.
* ptes must be 8*sizeof(unsigned long)
*/
static inline long plpar_pte_read_4_raw(unsigned long flags, unsigned long ptex,
unsigned long *ptes)
{
long rc;
unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
rc = plpar_hcall9_raw(H_READ, retbuf, flags | H_READ_4, ptex);
memcpy(ptes, retbuf, 8*sizeof(unsigned long));
return rc;
}
static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
unsigned long avpn)
{
return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn);
}
static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
unsigned long *tce_ret)
{
long rc;
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
rc = plpar_hcall(H_GET_TCE, retbuf, liobn, ioba);
*tce_ret = retbuf[0];
return rc;
}
static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba,
unsigned long tceval)
{
return plpar_hcall_norets(H_PUT_TCE, liobn, ioba, tceval);
}
static inline long plpar_tce_put_indirect(unsigned long liobn,
unsigned long ioba, unsigned long page, unsigned long count)
{
return plpar_hcall_norets(H_PUT_TCE_INDIRECT, liobn, ioba, page, count);
}
static inline long plpar_tce_stuff(unsigned long liobn, unsigned long ioba,
unsigned long tceval, unsigned long count)
{
return plpar_hcall_norets(H_STUFF_TCE, liobn, ioba, tceval, count);
}
/* Set various resource mode parameters */
static inline long plpar_set_mode(unsigned long mflags, unsigned long resource,
unsigned long value1, unsigned long value2)
{
return plpar_hcall_norets(H_SET_MODE, mflags, resource, value1, value2);
}
/*
* Enable relocation on exceptions on this partition
*
* Note: this call has a partition wide scope and can take a while to complete.
* If it returns H_LONG_BUSY_* it should be retried periodically until it
* returns H_SUCCESS.
*/
static inline long enable_reloc_on_exceptions(void)
{
/* mflags = 3: Exceptions at 0xC000000000004000 */
return plpar_set_mode(3, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0);
}
/*
* Disable relocation on exceptions on this partition
*
* Note: this call has a partition wide scope and can take a while to complete.
* If it returns H_LONG_BUSY_* it should be retried periodically until it
* returns H_SUCCESS.
*/
static inline long disable_reloc_on_exceptions(void) {
return plpar_set_mode(0, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0);
}
/*
* Take exceptions in big endian mode on this partition
*
* Note: this call has a partition wide scope and can take a while to complete.
* If it returns H_LONG_BUSY_* it should be retried periodically until it
* returns H_SUCCESS.
*/
static inline long enable_big_endian_exceptions(void)
{
/* mflags = 0: big endian exceptions */
return plpar_set_mode(0, H_SET_MODE_RESOURCE_LE, 0, 0);
}
/*
* Take exceptions in little endian mode on this partition
*
* Note: this call has a partition wide scope and can take a while to complete.
* If it returns H_LONG_BUSY_* it should be retried periodically until it
* returns H_SUCCESS.
*/
static inline long enable_little_endian_exceptions(void)
{
/* mflags = 1: little endian exceptions */
return plpar_set_mode(1, H_SET_MODE_RESOURCE_LE, 0, 0);
}
static inline long plapr_set_ciabr(unsigned long ciabr)
{
return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_CIABR, ciabr, 0);
}
static inline long plapr_set_watchpoint0(unsigned long dawr0, unsigned long dawrx0)
{
return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR, dawr0, dawrx0);
}
#endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */