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powerpc/pseries/svm: Drop unused align argument in alloc_shared_lppaca() function

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Argument "align" in alloc_shared_lppaca() was unused inside the
function. Let's drop it and update code comment for page alignment.

Signed-off-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
[mpe: Massage comment wording/formatting]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200612142953.135408-1-sathnaga@linux.vnet.ibm.com
This commit is contained in:
Satheesh Rajendran 2020-06-12 19:59:53 +05:30 committed by Michael Ellerman
parent 7c466b0807
commit 178748b6d1
1 changed files with 10 additions and 3 deletions
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13
arch/powerpc/kernel/paca.c
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@ -57,8 +57,8 @@ static void *__init alloc_paca_data(unsigned long size, unsigned long align,
#define LPPACA_SIZE 0x400
static void *__init alloc_shared_lppaca(unsigned long size, unsigned long align,
unsigned long limit, int cpu)
static void *__init alloc_shared_lppaca(unsigned long size, unsigned long limit,
int cpu)
{
size_t shared_lppaca_total_size = PAGE_ALIGN(nr_cpu_ids * LPPACA_SIZE);
static unsigned long shared_lppaca_size;
@ -68,6 +68,13 @@ static void *__init alloc_shared_lppaca(unsigned long size, unsigned long align,
if (!shared_lppaca) {
memblock_set_bottom_up(true);
/*
* See Documentation/powerpc/ultravisor.rst for more details.
*
* UV/HV data sharing is in PAGE_SIZE granularity. In order to
* minimize the number of pages shared, align the allocation to
* PAGE_SIZE.
*/
shared_lppaca =
memblock_alloc_try_nid(shared_lppaca_total_size,
PAGE_SIZE, MEMBLOCK_LOW_LIMIT,
@ -122,7 +129,7 @@ static struct lppaca * __init new_lppaca(int cpu, unsigned long limit)
return NULL;
if (is_secure_guest())
lp = alloc_shared_lppaca(LPPACA_SIZE, 0x400, limit, cpu);
lp = alloc_shared_lppaca(LPPACA_SIZE, limit, cpu);
else
lp = alloc_paca_data(LPPACA_SIZE, 0x400, limit, cpu);