Re: [PATCH] acpi/hmat: ACPI_HMAT_MEMORY_PD_VALID is deprecated in ACPI-6.3

[Daniel Black]

On Tue, 3 Sep 2019 11:03:45 +1000
Daniel Black  wrote:

> On Mon, 2 Sep 2019 23:28:50 +0200
> "Rafael J. Wysocki"  wrote:
> 
> > On Tue, Aug 6, 2019 at 6:24 AM Daniel Black  wrote:  
> > >
> > > ACPI-6.3 corresponds to when hmat revision was bumped from
> > > 1 to 2. In this version ACPI_HMAT_MEMORY_PD_VALID was
> > > deprecated and made reserved.
> > >
> > > As such in revision 2+ we shouldn't be testing this flag.
> > >
> > > This is as per ACPI-6.3, 5.2.27.3, Table 5-145
> > > "Memory Proximity Domain Attributes Structure"
> > > for Flags.
> > >
> > > Signed-off-by: Daniel Black 
> > 
> > Keith, any comments?  
> 
> FYI this was found when I was testing Tao Xu's qemu implementation of HMAT 
> ACPI-6.3 which has no implementation of  ACPI_HMAT_MEMORY_PD_VALID.
> 
> Current patch implementing Memory Proximity Domain Attributes Structure:
> https://patchwork.kernel.org/patch/11125301/


On Mon, 12 Aug 2019 16:03:15 +0800
Tao Xu  wrote:
> 
> Looks good to me.
> 
> Reviewed-by: Tao Xu 

Ping. Any comments?

Re: [PATCH] acpi/hmat: ACPI_HMAT_MEMORY_PD_VALID is deprecated in ACPI-6.3

[Daniel Black]

On Mon, 2 Sep 2019 23:28:50 +0200
"Rafael J. Wysocki"  wrote:

> On Tue, Aug 6, 2019 at 6:24 AM Daniel Black  wrote:
> >
> > ACPI-6.3 corresponds to when hmat revision was bumped from
> > 1 to 2. In this version ACPI_HMAT_MEMORY_PD_VALID was
> > deprecated and made reserved.
> >
> > As such in revision 2+ we shouldn't be testing this flag.
> >
> > This is as per ACPI-6.3, 5.2.27.3, Table 5-145
> > "Memory Proximity Domain Attributes Structure"
> > for Flags.
> >
> > Signed-off-by: Daniel Black   
> 
> Keith, any comments?

FYI this was found when I was testing Tao Xu's qemu implementation of HMAT 
ACPI-6.3 which has no implementation of  ACPI_HMAT_MEMORY_PD_VALID.

Current patch implementing Memory Proximity Domain Attributes Structure:
https://patchwork.kernel.org/patch/11125301/

[PATCH] acpi/hmat: ACPI_HMAT_MEMORY_PD_VALID is deprecated in ACPI-6.3

[Daniel Black]

ACPI-6.3 corresponds to when hmat revision was bumped from
1 to 2. In this version ACPI_HMAT_MEMORY_PD_VALID was
deprecated and made reserved.

As such in revision 2+ we shouldn't be testing this flag.

This is as per ACPI-6.3, 5.2.27.3, Table 5-145
"Memory Proximity Domain Attributes Structure"
for Flags.

Signed-off-by: Daniel Black 
---
 drivers/acpi/hmat/hmat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/hmat/hmat.c b/drivers/acpi/hmat/hmat.c
index 96b7d39a97c6..e938e34673d9 100644
--- a/drivers/acpi/hmat/hmat.c
+++ b/drivers/acpi/hmat/hmat.c
@@ -382,7 +382,7 @@ static int __init hmat_parse_proximity_domain(union 
acpi_subtable_headers *heade
pr_info("HMAT: Memory Flags:%04x Processor Domain:%d Memory 
Domain:%d\n",
p->flags, p->processor_PD, p->memory_PD);
 
-   if (p->flags & ACPI_HMAT_MEMORY_PD_VALID) {
+   if (p->flags & ACPI_HMAT_MEMORY_PD_VALID && hmat_revision == 1) {
target = find_mem_target(p->memory_PD);
if (!target) {
pr_debug("HMAT: Memory Domain missing from SRAT\n");
-- 
2.21.0