From: Joey Gouly <joey.gouly@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com,
broonie@kernel.org, catalin.marinas@arm.com,
dave.hansen@linux.intel.com, joey.gouly@arm.com, maz@kernel.org,
oliver.upton@linux.dev, shuah@kernel.org, will@kernel.org,
kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org, linux-kselftest@vger.kernel.org,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>
Subject: [PATCH v2 04/24] arm64: disable trapping of POR_EL0 to EL2
Date: Fri, 27 Oct 2023 19:08:30 +0100 [thread overview]
Message-ID: <20231027180850.1068089-5-joey.gouly@arm.com> (raw)
In-Reply-To: <20231027180850.1068089-1-joey.gouly@arm.com>
Allow EL0 or EL1 to access POR_EL0 without being trapped to EL2.
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
---
arch/arm64/include/asm/el2_setup.h | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/el2_setup.h b/arch/arm64/include/asm/el2_setup.h
index b7afaa026842..df5614be4b70 100644
--- a/arch/arm64/include/asm/el2_setup.h
+++ b/arch/arm64/include/asm/el2_setup.h
@@ -184,12 +184,20 @@
.Lset_pie_fgt_\@:
mrs_s x1, SYS_ID_AA64MMFR3_EL1
ubfx x1, x1, #ID_AA64MMFR3_EL1_S1PIE_SHIFT, #4
- cbz x1, .Lset_fgt_\@
+ cbz x1, .Lset_poe_fgt_\@
/* Disable trapping of PIR_EL1 / PIRE0_EL1 */
orr x0, x0, #HFGxTR_EL2_nPIR_EL1
orr x0, x0, #HFGxTR_EL2_nPIRE0_EL1
+.Lset_poe_fgt_\@:
+ mrs_s x1, SYS_ID_AA64MMFR3_EL1
+ ubfx x1, x1, #ID_AA64MMFR3_EL1_S1POE_SHIFT, #4
+ cbz x1, .Lset_fgt_\@
+
+ /* Disable trapping of POR_EL0 */
+ orr x0, x0, #HFGxTR_EL2_nPOR_EL0
+
.Lset_fgt_\@:
msr_s SYS_HFGRTR_EL2, x0
msr_s SYS_HFGWTR_EL2, x0
--
2.25.1
next prev parent reply other threads:[~2023-10-27 18:09 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-27 18:08 [PATCH v2 00/20] Permission Overlay Extension Joey Gouly
2023-10-27 18:08 ` [PATCH v2 01/24] arm64/sysreg: add system register POR_EL{0,1} Joey Gouly
2023-10-27 18:08 ` [PATCH v2 02/24] arm64/sysreg: update CPACR_EL1 register Joey Gouly
2023-10-27 18:08 ` [PATCH v2 03/24] arm64: cpufeature: add Permission Overlay Extension cpucap Joey Gouly
2023-10-27 18:08 ` Joey Gouly [this message]
2023-10-27 18:08 ` [PATCH v2 05/24] arm64: context switch POR_EL0 register Joey Gouly
2023-10-27 18:08 ` [PATCH v2 06/24] KVM: arm64: Save/restore POE registers Joey Gouly
2023-10-27 18:08 ` [PATCH v2 07/24] arm64: enable the Permission Overlay Extension for EL0 Joey Gouly
2023-10-27 18:08 ` [PATCH v2 08/24] arm64: add POIndex defines Joey Gouly
2023-10-27 18:08 ` [PATCH v2 09/24] arm64: define VM_PKEY_BIT* for arm64 Joey Gouly
2023-10-27 18:08 ` [PATCH v2 10/24] arm64: mask out POIndex when modifying a PTE Joey Gouly
2023-10-27 18:08 ` [PATCH v2 11/24] arm64: enable ARCH_HAS_PKEYS on arm64 Joey Gouly
2023-10-27 18:08 ` [PATCH v2 12/24] arm64: handle PKEY/POE faults Joey Gouly
2023-10-27 18:08 ` [PATCH v2 13/24] arm64: stop using generic mm_hooks.h Joey Gouly
2023-10-27 18:08 ` [PATCH v2 14/24] arm64: implement PKEYS support Joey Gouly
2023-10-27 18:08 ` [PATCH v2 15/24] arm64: add POE signal support Joey Gouly
2023-10-30 19:10 ` Mark Brown
2023-10-27 18:08 ` [PATCH v2 16/24] arm64: enable PKEY support for CPUs with S1POE Joey Gouly
2023-10-27 18:08 ` [PATCH v2 17/24] arm64: enable POE and PIE to coexist Joey Gouly
2023-10-27 18:08 ` [PATCH v2 18/24] kselftest/arm64: move get_header() Joey Gouly
2023-10-27 18:08 ` [PATCH v2 19/24] selftests: mm: move fpregs printing Joey Gouly
2023-10-27 18:08 ` [PATCH v2 20/24] selftests: mm: make protection_keys test work on arm64 Joey Gouly
2023-10-27 18:08 ` [PATCH v2 21/24] kselftest/arm64: add HWCAP test for FEAT_S1POE Joey Gouly
2023-10-30 19:18 ` Mark Brown
2023-10-27 18:08 ` [PATCH v2 22/24] kselftest/arm64: parse POE_MAGIC in a signal frame Joey Gouly
2023-10-30 19:19 ` Mark Brown
2023-10-27 18:08 ` [PATCH v2 23/24] kselftest/arm64: Add test case for POR_EL0 signal frame records Joey Gouly
2023-10-27 18:08 ` [PATCH v2 24/24] KVM: selftests: get-reg-list: add Permission Overlay registers Joey Gouly
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