[RFC v2 07/14] arm64/mm: Introduce NUM_ASIDS

All of lore.kernel.org
 help / color / mirror / Atom feed

From: Julien Grall <julien.grall@arm.com>
To: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu
Cc: james.morse@arm.com, marc.zyngier@arm.com,
	julien.thierry@arm.com, suzuki.poulose@arm.com,
	catalin.marinas@arm.com, will.deacon@arm.com,
	Julien Grall <julien.grall@arm.com>
Subject: [RFC v2 07/14] arm64/mm: Introduce NUM_ASIDS
Date: Thu, 20 Jun 2019 14:06:01 +0100	[thread overview]
Message-ID: <20190620130608.17230-8-julien.grall@arm.com> (raw)
In-Reply-To: <20190620130608.17230-1-julien.grall@arm.com>

At the moment ASID_FIRST_VERSION is used to know the number of ASIDs
supported. As we are going to move the ASID allocator in a separate, it
would be better to use a different name for external users.

This patch adds NUM_ASIDS and implements ASID_FIRST_VERSION using it.

Signed-off-by: Julien Grall <julien.grall@arm.com>
---
 arch/arm64/mm/context.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index d128f02644b0..beba8e5b4100 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -48,7 +48,9 @@ static DEFINE_PER_CPU(atomic64_t, active_asids);
 static DEFINE_PER_CPU(u64, reserved_asids);
 
 #define ASID_MASK(info)			(~GENMASK((info)->bits - 1, 0))
-#define ASID_FIRST_VERSION(info)	(1UL << ((info)->bits))
+#define NUM_ASIDS(info)			(1UL << ((info)->bits))
+
+#define ASID_FIRST_VERSION(info)	NUM_ASIDS(info)
 
 #ifdef CONFIG_UNMAP_KERNEL_AT_EL0
 #define ASID_PER_CONTEXT		2
@@ -56,7 +58,7 @@ static DEFINE_PER_CPU(u64, reserved_asids);
 #define ASID_PER_CONTEXT		1
 #endif
 
-#define NUM_CTXT_ASIDS(info)		(ASID_FIRST_VERSION(info) >> (info)->ctxt_shift)
+#define NUM_CTXT_ASIDS(info)		(NUM_ASIDS(info) >> (info)->ctxt_shift)
 #define asid2idx(info, asid)		(((asid) & ~ASID_MASK(info)) >> (info)->ctxt_shift)
 #define idx2asid(info, idx)		(((idx) << (info)->ctxt_shift) & ~ASID_MASK(info))
 
-- 
2.11.0

WARNING: multiple messages have this Message-ID (diff)

From: Julien Grall <julien.grall@arm.com>
To: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu
Cc: marc.zyngier@arm.com, catalin.marinas@arm.com,
	will.deacon@arm.com, Julien Grall <julien.grall@arm.com>
Subject: [RFC v2 07/14] arm64/mm: Introduce NUM_ASIDS
Date: Thu, 20 Jun 2019 14:06:01 +0100	[thread overview]
Message-ID: <20190620130608.17230-8-julien.grall@arm.com> (raw)
In-Reply-To: <20190620130608.17230-1-julien.grall@arm.com>

At the moment ASID_FIRST_VERSION is used to know the number of ASIDs
supported. As we are going to move the ASID allocator in a separate, it
would be better to use a different name for external users.

This patch adds NUM_ASIDS and implements ASID_FIRST_VERSION using it.

Signed-off-by: Julien Grall <julien.grall@arm.com>
---
 arch/arm64/mm/context.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index d128f02644b0..beba8e5b4100 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -48,7 +48,9 @@ static DEFINE_PER_CPU(atomic64_t, active_asids);
 static DEFINE_PER_CPU(u64, reserved_asids);
 
 #define ASID_MASK(info)			(~GENMASK((info)->bits - 1, 0))
-#define ASID_FIRST_VERSION(info)	(1UL << ((info)->bits))
+#define NUM_ASIDS(info)			(1UL << ((info)->bits))
+
+#define ASID_FIRST_VERSION(info)	NUM_ASIDS(info)
 
 #ifdef CONFIG_UNMAP_KERNEL_AT_EL0
 #define ASID_PER_CONTEXT		2
@@ -56,7 +58,7 @@ static DEFINE_PER_CPU(u64, reserved_asids);
 #define ASID_PER_CONTEXT		1
 #endif
 
-#define NUM_CTXT_ASIDS(info)		(ASID_FIRST_VERSION(info) >> (info)->ctxt_shift)
+#define NUM_CTXT_ASIDS(info)		(NUM_ASIDS(info) >> (info)->ctxt_shift)
 #define asid2idx(info, asid)		(((asid) & ~ASID_MASK(info)) >> (info)->ctxt_shift)
 #define idx2asid(info, idx)		(((idx) << (info)->ctxt_shift) & ~ASID_MASK(info))
 
-- 
2.11.0

_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm

WARNING: multiple messages have this Message-ID (diff)

From: Julien Grall <julien.grall@arm.com>
To: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu
Cc: suzuki.poulose@arm.com, marc.zyngier@arm.com,
	catalin.marinas@arm.com, julien.thierry@arm.com,
	will.deacon@arm.com, Julien Grall <julien.grall@arm.com>,
	james.morse@arm.com
Subject: [RFC v2 07/14] arm64/mm: Introduce NUM_ASIDS
Date: Thu, 20 Jun 2019 14:06:01 +0100	[thread overview]
Message-ID: <20190620130608.17230-8-julien.grall@arm.com> (raw)
In-Reply-To: <20190620130608.17230-1-julien.grall@arm.com>

At the moment ASID_FIRST_VERSION is used to know the number of ASIDs
supported. As we are going to move the ASID allocator in a separate, it
would be better to use a different name for external users.

This patch adds NUM_ASIDS and implements ASID_FIRST_VERSION using it.

Signed-off-by: Julien Grall <julien.grall@arm.com>
---
 arch/arm64/mm/context.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index d128f02644b0..beba8e5b4100 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -48,7 +48,9 @@ static DEFINE_PER_CPU(atomic64_t, active_asids);
 static DEFINE_PER_CPU(u64, reserved_asids);
 
 #define ASID_MASK(info)			(~GENMASK((info)->bits - 1, 0))
-#define ASID_FIRST_VERSION(info)	(1UL << ((info)->bits))
+#define NUM_ASIDS(info)			(1UL << ((info)->bits))
+
+#define ASID_FIRST_VERSION(info)	NUM_ASIDS(info)
 
 #ifdef CONFIG_UNMAP_KERNEL_AT_EL0
 #define ASID_PER_CONTEXT		2
@@ -56,7 +58,7 @@ static DEFINE_PER_CPU(u64, reserved_asids);
 #define ASID_PER_CONTEXT		1
 #endif
 
-#define NUM_CTXT_ASIDS(info)		(ASID_FIRST_VERSION(info) >> (info)->ctxt_shift)
+#define NUM_CTXT_ASIDS(info)		(NUM_ASIDS(info) >> (info)->ctxt_shift)
 #define asid2idx(info, asid)		(((asid) & ~ASID_MASK(info)) >> (info)->ctxt_shift)
 #define idx2asid(info, idx)		(((idx) << (info)->ctxt_shift) & ~ASID_MASK(info))
 
-- 
2.11.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

next prev parent reply	other threads:[~2019-06-20 13:07 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-20 13:05 [RFC v2 00/14] kvm/arm: Align the VMID allocation with the arm64 ASID one Julien Grall
2019-06-20 13:05 ` Julien Grall
2019-06-20 13:05 ` Julien Grall
2019-06-20 13:05 ` [RFC v2 01/14] arm64/mm: Introduce asid_info structure and move asid_generation/asid_map to it Julien Grall
2019-06-20 13:05   ` Julien Grall
2019-06-20 13:05   ` Julien Grall
2019-06-20 13:05 ` [RFC v2 02/14] arm64/mm: Move active_asids and reserved_asids to asid_info Julien Grall
2019-06-20 13:05   ` Julien Grall
2019-06-20 13:05   ` Julien Grall
2019-06-20 13:05 ` [RFC v2 03/14] arm64/mm: Move bits " Julien Grall
2019-06-20 13:05   ` Julien Grall
2019-06-20 13:05   ` Julien Grall
2019-06-20 13:05 ` [RFC v2 04/14] arm64/mm: Move the variable lock and tlb_flush_pending " Julien Grall
2019-06-20 13:05   ` Julien Grall
2019-06-20 13:05   ` Julien Grall
2019-06-20 13:05 ` [RFC v2 05/14] arm64/mm: Remove dependency on MM in new_context Julien Grall
2019-06-20 13:05   ` Julien Grall
2019-06-20 13:05   ` Julien Grall
2019-06-20 13:06 ` [RFC v2 06/14] arm64/mm: Store the number of asid allocated per context Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06 ` Julien Grall [this message]
2019-06-20 13:06   ` [RFC v2 07/14] arm64/mm: Introduce NUM_ASIDS Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06 ` [RFC v2 08/14] arm64/mm: Split asid_inits in 2 parts Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06 ` [RFC v2 09/14] arm64/mm: Split the function check_and_switch_context in 3 parts Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06 ` [RFC v2 10/14] arm64/mm: Introduce a callback to flush the local context Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06 ` [RFC v2 11/14] arm64: Move the ASID allocator code in a separate file Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-07-04 14:56   ` James Morse
2019-07-04 14:56     ` James Morse
2019-07-04 14:56     ` James Morse
2019-07-15 10:58     ` Julien Grall
2019-07-15 10:58       ` Julien Grall
2019-07-15 10:58       ` Julien Grall
2019-06-20 13:06 ` [RFC v2 12/14] arm64/lib: asid: Allow user to update the context under the lock Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-07-03 17:35   ` James Morse
2019-07-03 17:35     ` James Morse
2019-07-03 17:35     ` James Morse
2019-07-15 14:38     ` Julien Grall
2019-07-15 14:38       ` Julien Grall
2019-07-15 14:38       ` Julien Grall
2019-06-20 13:06 ` [RFC v2 13/14] arm/kvm: Introduce a new VMID allocator Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06 ` [RFC v2 14/14] kvm/arm: Align the VMID allocation with the arm64 ASID one Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-06-20 13:06   ` Julien Grall
2019-07-03 17:36   ` James Morse
2019-07-03 17:36     ` James Morse
2019-07-03 17:36     ` James Morse
2019-07-15 17:06     ` Julien Grall
2019-07-15 17:06       ` Julien Grall
2019-07-15 17:06       ` Julien Grall

find likely ancestor, descendant, or conflicting patches for this message:
dfblob:d128f02644b dfblob:d128f02644b dfblob:d128f02644b
dfblob:beba8e5b410 dfblob:beba8e5b410 dfblob:beba8e5b410
	(help)

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190620130608.17230-8-julien.grall@arm.com \
    --to=julien.grall@arm.com \
    --cc=catalin.marinas@arm.com \
    --cc=james.morse@arm.com \
    --cc=julien.thierry@arm.com \
    --cc=kvmarm@lists.cs.columbia.edu \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=marc.zyngier@arm.com \
    --cc=suzuki.poulose@arm.com \
    --cc=will.deacon@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Be sure your reply has a Subject: header at the top and a blank line before the message body.

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.