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Commit 282498d6 authored by Cédric Le Goater's avatar Cédric Le Goater Committed by Michael Ellerman
Browse files

powerpc/xive: prepare all hcalls to support long busy delays 



This is not the case for the moment, but future releases of pHyp might
need to introduce some synchronisation routines under the hood which
would make the XIVE hcalls longer to complete.

As this was done for H_INT_RESET, let's wrap the other hcalls in a
loop catching the H_LONG_BUSY_* codes.

Signed-off-by: default avatarCédric Le Goater <clg@kaod.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 72224846

arch/powerpc/sysdev/xive/spapr.c

+28 −8
Original line number Diff line number Diff line
@@ -164,7 +164,10 @@ static long plpar_int_get_source_info(unsigned long flags, 
	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];

	long rc;



	do {

		rc = plpar_hcall(H_INT_GET_SOURCE_INFO, retbuf, flags, lisn);

	} while (plpar_busy_delay(rc));



	if (rc) {

		pr_err("H_INT_GET_SOURCE_INFO lisn=%ld failed %ld\n", lisn, rc);

		return rc;
@@ -197,8 +200,11 @@ static long plpar_int_set_source_config(unsigned long flags, 
		flags, lisn, target, prio, sw_irq);





	do {

		rc = plpar_hcall_norets(H_INT_SET_SOURCE_CONFIG, flags, lisn,

					target, prio, sw_irq);

	} while (plpar_busy_delay(rc));



	if (rc) {

		pr_err("H_INT_SET_SOURCE_CONFIG lisn=%ld target=%lx prio=%lx failed %ld\n",

		       lisn, target, prio, rc);
@@ -217,7 +223,11 @@ static long plpar_int_get_queue_info(unsigned long flags, 
	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];

	long rc;



	rc = plpar_hcall(H_INT_GET_QUEUE_INFO, retbuf, flags, target, priority);

	do {

		rc = plpar_hcall(H_INT_GET_QUEUE_INFO, retbuf, flags, target,

				 priority);

	} while (plpar_busy_delay(rc));



	if (rc) {

		pr_err("H_INT_GET_QUEUE_INFO cpu=%ld prio=%ld failed %ld\n",

		       target, priority, rc);
@@ -246,8 +256,11 @@ static long plpar_int_set_queue_config(unsigned long flags, 
	pr_devel("H_INT_SET_QUEUE_CONFIG flags=%lx target=%lx priority=%lx qpage=%lx qsize=%lx\n",

		flags,  target, priority, qpage, qsize);



	do {

		rc = plpar_hcall_norets(H_INT_SET_QUEUE_CONFIG, flags, target,

					priority, qpage, qsize);

	} while (plpar_busy_delay(rc));



	if (rc) {

		pr_err("H_INT_SET_QUEUE_CONFIG cpu=%ld prio=%ld qpage=%lx returned %ld\n",

		       target, priority, qpage, rc);
@@ -261,7 +274,10 @@ static long plpar_int_sync(unsigned long flags, unsigned long lisn) 
{

	long rc;



	do {

		rc = plpar_hcall_norets(H_INT_SYNC, flags, lisn);

	} while (plpar_busy_delay(rc));



	if (rc) {

		pr_err("H_INT_SYNC lisn=%ld returned %ld\n", lisn, rc);

		return  rc;
@@ -284,7 +300,11 @@ static long plpar_int_esb(unsigned long flags, 
	pr_devel("H_INT_ESB flags=%lx lisn=%lx offset=%lx in=%lx\n",

		flags,  lisn, offset, in_data);



	rc = plpar_hcall(H_INT_ESB, retbuf, flags, lisn, offset, in_data);

	do {

		rc = plpar_hcall(H_INT_ESB, retbuf, flags, lisn, offset,

				 in_data);

	} while (plpar_busy_delay(rc));



	if (rc) {

		pr_err("H_INT_ESB lisn=%ld offset=%ld returned %ld\n",

		       lisn, offset, rc);