From: Haren Myneni <haren@linux.ibm.com> To: linuxppc-dev@lists.ozlabs.org, linux-crypto@vger.kernel.org, mpe@ellerman.id.au, herbert@gondor.apana.org.au, npiggin@gmail.com Cc: hbabu@us.ibm.com, haren@us.ibm.com Subject: [V3 PATCH 07/16] powerpc/vas: Define QoS credit flag to allocate window Date: Sat, 17 Apr 2021 14:06:16 -0700 [thread overview] Message-ID: <90328d5aa92016434f3061ec7cadc812ea2c5dbc.camel@linux.ibm.com> (raw) In-Reply-To: <a910e5bd3f3398b4bd430b25a856500735b993c3.camel@linux.ibm.com> pHyp introduces two different type of credits: Default and Quality of service (QoS). The total number of default credits available on each LPAR depends on CPU resources configured. But these credits can be shared or over-committed across LPARs in shared mode which can result in paste command failure (RMA_busy). To avoid NX HW contention, phyp introduces QoS credit type which makes sure guaranteed access to NX resources. The system admins can assign QoS credits for each LPAR via HMC. Default credit type is used to allocate a VAS window by default as on powerVM implementation. But the process can pass VAS_WIN_QOS_CREDITS flag with VAS_TX_WIN_OPEN ioctl to open QoS type window. Signed-off-by: Haren Myneni <haren@linux.ibm.com> --- arch/powerpc/include/uapi/asm/vas-api.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/uapi/asm/vas-api.h b/arch/powerpc/include/uapi/asm/vas-api.h index ebd4b2424785..eb7c8694174f 100644 --- a/arch/powerpc/include/uapi/asm/vas-api.h +++ b/arch/powerpc/include/uapi/asm/vas-api.h @@ -13,11 +13,15 @@ #define VAS_MAGIC 'v' #define VAS_TX_WIN_OPEN _IOW(VAS_MAGIC, 0x20, struct vas_tx_win_open_attr) +/* Flags to VAS TX open window ioctl */ +/* To allocate a window with QoS credit, otherwise default credit is used */ +#define VAS_WIN_QOS_CREDITS 0x0000000000000001 + struct vas_tx_win_open_attr { __u32 version; __s16 vas_id; /* specific instance of vas or -1 for default */ __u16 reserved1; - __u64 flags; /* Future use */ + __u64 flags; __u64 reserved2[6]; }; -- 2.18.2
WARNING: multiple messages have this Message-ID (diff)
From: Haren Myneni <haren@linux.ibm.com> To: linuxppc-dev@lists.ozlabs.org, linux-crypto@vger.kernel.org, mpe@ellerman.id.au, herbert@gondor.apana.org.au, npiggin@gmail.com Subject: [V3 PATCH 07/16] powerpc/vas: Define QoS credit flag to allocate window Date: Sat, 17 Apr 2021 14:06:16 -0700 [thread overview] Message-ID: <90328d5aa92016434f3061ec7cadc812ea2c5dbc.camel@linux.ibm.com> (raw) In-Reply-To: <a910e5bd3f3398b4bd430b25a856500735b993c3.camel@linux.ibm.com> pHyp introduces two different type of credits: Default and Quality of service (QoS). The total number of default credits available on each LPAR depends on CPU resources configured. But these credits can be shared or over-committed across LPARs in shared mode which can result in paste command failure (RMA_busy). To avoid NX HW contention, phyp introduces QoS credit type which makes sure guaranteed access to NX resources. The system admins can assign QoS credits for each LPAR via HMC. Default credit type is used to allocate a VAS window by default as on powerVM implementation. But the process can pass VAS_WIN_QOS_CREDITS flag with VAS_TX_WIN_OPEN ioctl to open QoS type window. Signed-off-by: Haren Myneni <haren@linux.ibm.com> --- arch/powerpc/include/uapi/asm/vas-api.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/uapi/asm/vas-api.h b/arch/powerpc/include/uapi/asm/vas-api.h index ebd4b2424785..eb7c8694174f 100644 --- a/arch/powerpc/include/uapi/asm/vas-api.h +++ b/arch/powerpc/include/uapi/asm/vas-api.h @@ -13,11 +13,15 @@ #define VAS_MAGIC 'v' #define VAS_TX_WIN_OPEN _IOW(VAS_MAGIC, 0x20, struct vas_tx_win_open_attr) +/* Flags to VAS TX open window ioctl */ +/* To allocate a window with QoS credit, otherwise default credit is used */ +#define VAS_WIN_QOS_CREDITS 0x0000000000000001 + struct vas_tx_win_open_attr { __u32 version; __s16 vas_id; /* specific instance of vas or -1 for default */ __u16 reserved1; - __u64 flags; /* Future use */ + __u64 flags; __u64 reserved2[6]; }; -- 2.18.2
next prev parent reply other threads:[~2021-04-17 21:06 UTC|newest] Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-17 20:52 [V3 PATCH 00/16] Enable VAS and NX-GZIP support on powerVM Haren Myneni 2021-04-17 20:52 ` Haren Myneni 2021-04-17 21:00 ` [V3 PATCH 01/16] powerpc/powernv/vas: Rename register/unregister functions Haren Myneni 2021-04-17 21:00 ` Haren Myneni 2021-05-10 5:10 ` Nicholas Piggin 2021-05-10 5:10 ` Nicholas Piggin 2021-05-10 16:59 ` Haren Myneni 2021-05-10 16:59 ` Haren Myneni 2021-04-17 21:02 ` [PATCH V3 02/16] powerpc/vas: Move VAS API to common book3s platform Haren Myneni 2021-04-17 21:02 ` Haren Myneni 2021-05-10 5:19 ` Nicholas Piggin 2021-05-10 5:19 ` Nicholas Piggin 2021-05-10 17:12 ` Haren Myneni 2021-05-10 17:12 ` Haren Myneni 2021-05-11 1:50 ` Michael Ellerman 2021-05-11 1:50 ` Michael Ellerman 2021-04-17 21:03 ` [V3 PATCH 03/16] powerpc/vas: Create take/drop task reference functions Haren Myneni 2021-04-17 21:03 ` Haren Myneni 2021-05-10 5:28 ` Nicholas Piggin 2021-05-10 5:28 ` Nicholas Piggin 2021-05-10 20:32 ` Haren Myneni 2021-05-10 20:32 ` Haren Myneni 2021-04-17 21:03 ` [V3 PATCH 04/16] powerpc/vas: Move update_csb/dump_crb to common book3s platform Haren Myneni 2021-04-17 21:03 ` Haren Myneni 2021-05-10 5:37 ` Nicholas Piggin 2021-05-10 5:37 ` Nicholas Piggin 2021-04-17 21:04 ` [V3 PATCH 05/16] powerpc/vas: Define and use common vas_window struct Haren Myneni 2021-04-17 21:04 ` Haren Myneni 2021-05-10 5:37 ` Nicholas Piggin 2021-05-10 5:37 ` Nicholas Piggin 2021-05-10 17:02 ` Haren Myneni 2021-05-10 17:02 ` Haren Myneni 2021-04-17 21:05 ` [V3 PATCH 06/16] powerpc/pseries/vas: Define VAS/NXGZIP HCALLs and structs Haren Myneni 2021-04-17 21:05 ` Haren Myneni 2021-05-10 5:49 ` Nicholas Piggin 2021-05-10 5:49 ` Nicholas Piggin 2021-05-11 2:18 ` Haren Myneni 2021-05-11 2:18 ` Haren Myneni 2021-04-17 21:06 ` Haren Myneni [this message] 2021-04-17 21:06 ` [V3 PATCH 07/16] powerpc/vas: Define QoS credit flag to allocate window Haren Myneni 2021-05-10 5:54 ` Nicholas Piggin 2021-05-10 5:54 ` Nicholas Piggin 2021-05-11 2:12 ` Haren Myneni 2021-05-11 2:12 ` Haren Myneni 2021-04-17 21:07 ` [V3 PATCH 08/16] powerpc/pseries/VAS: Implement allocate/modify/deallocate HCALLS Haren Myneni 2021-04-17 21:07 ` Haren Myneni 2021-05-10 6:01 ` Nicholas Piggin 2021-05-10 6:01 ` Nicholas Piggin 2021-04-17 21:08 ` [V3 PATCH 09/16] powerpc/pseries/vas: Implement to get all capabilities Haren Myneni 2021-04-17 21:08 ` Haren Myneni 2021-05-10 6:13 ` Nicholas Piggin 2021-05-10 6:13 ` Nicholas Piggin 2021-05-11 2:08 ` Haren Myneni 2021-05-11 2:08 ` Haren Myneni 2021-04-17 21:08 ` [V3 PATCH 10/16] powerpc/pseries/vas: Integrate API with open/close windows Haren Myneni 2021-04-17 21:08 ` Haren Myneni 2021-05-10 6:18 ` Nicholas Piggin 2021-05-10 6:18 ` Nicholas Piggin 2021-05-10 6:28 ` Nicholas Piggin 2021-05-10 6:28 ` Nicholas Piggin 2021-04-17 21:09 ` [V3 PATCH 11/16] powerpc/pseries/vas: Setup IRQ and fault handling Haren Myneni 2021-04-17 21:09 ` Haren Myneni 2021-04-17 21:10 ` [V3 PATCH 12/16] powerpc/pseries/vas: sysfs interface to export capabilities Haren Myneni 2021-04-17 21:10 ` Haren Myneni 2021-05-10 6:34 ` Nicholas Piggin 2021-05-10 6:34 ` Nicholas Piggin 2021-05-10 20:52 ` Haren Myneni 2021-05-10 20:52 ` Haren Myneni 2021-04-17 21:11 ` [V3 PATCH 13/16] crypto/nx: Rename nx-842-pseries file name to nx-common-pseries Haren Myneni 2021-04-17 21:11 ` Haren Myneni 2021-04-22 6:55 ` Herbert Xu 2021-04-22 6:55 ` Herbert Xu 2021-04-17 21:12 ` [V3 PATCH 14/16] crypto/nx: Register and unregister VAS interface Haren Myneni 2021-04-17 21:12 ` Haren Myneni 2021-04-22 6:56 ` Herbert Xu 2021-04-22 6:56 ` Herbert Xu 2021-04-17 21:12 ` [V3 PATCH 15/16] crypto/nx: Get NX capabilities for GZIP coprocessor type Haren Myneni 2021-04-17 21:12 ` Haren Myneni 2021-04-22 6:56 ` Herbert Xu 2021-04-22 6:56 ` Herbert Xu 2021-05-10 6:38 ` Nicholas Piggin 2021-05-10 6:38 ` Nicholas Piggin 2021-05-10 20:44 ` Haren Myneni 2021-05-10 20:44 ` Haren Myneni 2021-04-17 21:13 ` [V3 PATCH 16/16] crypto/nx: Add sysfs interface to export NX capabilities Haren Myneni 2021-04-17 21:13 ` Haren Myneni 2021-04-22 6:56 ` Herbert Xu 2021-04-22 6:56 ` Herbert Xu
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