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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Jun 2025 17:55:26.1467 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2192844d-ab32-4c93-88db-08dda9112554 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: AM4PEPF00025F9B.EURPRD83.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB9337 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250611_105533_615926_CC599409 X-CRM114-Status: GOOD ( 16.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Marc, > On Wed, 11 Jun 2025 11:49:12 +0100, > Yeoreum Yun wrote: > > > > Since Armv9.6, FEAT_LSUI supplies the load/store instructions for > > previleged level to access to access user memory without clearing > > PSTATE.PAN bit. > > It's enough to add CONFIG_AS_HAS_LSUI only because the code for LUSI uses > > indiviual `.arch_extension` entries. > > > > Signed-off-by: Yeoreum Yun > > --- > > arch/arm64/Kconfig | 8 +++++++- > > 1 file changed, 7 insertions(+), 1 deletion(-) > > > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > > index 55fc331af337..20f360eef2ac 100644 > > --- a/arch/arm64/Kconfig > > +++ b/arch/arm64/Kconfig > > @@ -2237,6 +2237,13 @@ config ARM64_GCS > > > > endmenu # "v9.4 architectural features" > > > > +menu "v9.6 architectural features" > > + > > +config AS_HAS_LSUI > > + def_bool $(as-instr,.arch_extension lsui) > > + > > +endmenu # "v9.6 architectural features" > > + > > config ARM64_SVE > > bool "ARM Scalable Vector Extension support" > > default y > > @@ -2498,4 +2505,3 @@ endmenu # "CPU Power Management" > > source "drivers/acpi/Kconfig" > > > > source "arch/arm64/kvm/Kconfig" > > - > > Can you please document what toolchain versions have support for this? > > Thanks, Okay. But here with comment or Is any other suggested place for this? Thanks. -- Sincerely, Yeoreum Yun