powerpc/pseries: Add hcall to read 4 ptes at a time in real mode
This adds plpar_pte_read_4_raw() which can be used read 4 PTEs from PHYP at a time, while in real mode. It also creates a new hcall9 which can be used in real mode. It's the same as plpar_hcall9 but minus the tracing hcall statistics which may require variables outside the RMO. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
parent
095c7965f4
commit
f90ece28c1
|
@ -282,6 +282,7 @@ long plpar_hcall_raw(unsigned long opcode, unsigned long *retbuf, ...);
|
||||||
*/
|
*/
|
||||||
#define PLPAR_HCALL9_BUFSIZE 9
|
#define PLPAR_HCALL9_BUFSIZE 9
|
||||||
long plpar_hcall9(unsigned long opcode, unsigned long *retbuf, ...);
|
long plpar_hcall9(unsigned long opcode, unsigned long *retbuf, ...);
|
||||||
|
long plpar_hcall9_raw(unsigned long opcode, unsigned long *retbuf, ...);
|
||||||
|
|
||||||
/* For hcall instrumentation. One structure per-hcall, per-CPU */
|
/* For hcall instrumentation. One structure per-hcall, per-CPU */
|
||||||
struct hcall_stats {
|
struct hcall_stats {
|
||||||
|
|
|
@ -228,3 +228,41 @@ _GLOBAL(plpar_hcall9)
|
||||||
mtcrf 0xff,r0
|
mtcrf 0xff,r0
|
||||||
|
|
||||||
blr /* return r3 = status */
|
blr /* return r3 = status */
|
||||||
|
|
||||||
|
/* See plpar_hcall_raw to see why this is needed */
|
||||||
|
_GLOBAL(plpar_hcall9_raw)
|
||||||
|
HMT_MEDIUM
|
||||||
|
|
||||||
|
mfcr r0
|
||||||
|
stw r0,8(r1)
|
||||||
|
|
||||||
|
std r4,STK_PARM(r4)(r1) /* Save ret buffer */
|
||||||
|
|
||||||
|
mr r4,r5
|
||||||
|
mr r5,r6
|
||||||
|
mr r6,r7
|
||||||
|
mr r7,r8
|
||||||
|
mr r8,r9
|
||||||
|
mr r9,r10
|
||||||
|
ld r10,STK_PARM(r11)(r1) /* put arg7 in R10 */
|
||||||
|
ld r11,STK_PARM(r12)(r1) /* put arg8 in R11 */
|
||||||
|
ld r12,STK_PARM(r13)(r1) /* put arg9 in R12 */
|
||||||
|
|
||||||
|
HVSC /* invoke the hypervisor */
|
||||||
|
|
||||||
|
mr r0,r12
|
||||||
|
ld r12,STK_PARM(r4)(r1)
|
||||||
|
std r4, 0(r12)
|
||||||
|
std r5, 8(r12)
|
||||||
|
std r6, 16(r12)
|
||||||
|
std r7, 24(r12)
|
||||||
|
std r8, 32(r12)
|
||||||
|
std r9, 40(r12)
|
||||||
|
std r10,48(r12)
|
||||||
|
std r11,56(r12)
|
||||||
|
std r0, 64(r12)
|
||||||
|
|
||||||
|
lwz r0,8(r1)
|
||||||
|
mtcrf 0xff,r0
|
||||||
|
|
||||||
|
blr /* return r3 = status */
|
||||||
|
|
|
@ -191,6 +191,24 @@ static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex,
|
||||||
return rc;
|
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,
|
static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
|
||||||
unsigned long avpn)
|
unsigned long avpn)
|
||||||
{
|
{
|
||||||
|
|
Loading…
Reference in New Issue