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From: Joey Gouly <joey.gouly@arm.com>
To: <linux-arm-kernel@lists.infradead.org>
Cc: <nd@arm.com>, <broonie@kernel.org>, <catalin.marinas@arm.com>,
	<james.morse@arm.com>, <joey.gouly@arm.com>,
	<mark.rutland@arm.com>, <maz@kernel.org>,
	<oliver.upton@linux.dev>, <suzuki.poulose@arm.com>,
	<will@kernel.org>, <yuzenghui@huawei.com>
Subject: [PATCH v2 16/19] arm64: enable Permission Indirection Extension (PIE)
Date: Thu, 13 Apr 2023 12:05:10 +0100	[thread overview]
Message-ID: <20230413110513.243326-17-joey.gouly@arm.com> (raw)
In-Reply-To: <20230413110513.243326-1-joey.gouly@arm.com>

Now that the necessary changes have been made, set the Permission Indirection
registers and enable the Permission Indirection Extension.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/mm/proc.S | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index 644e8daa25df..c2695e3ffc96 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -454,6 +454,21 @@ SYM_FUNC_START(__cpu_setup)
 #endif	/* CONFIG_ARM64_HW_AFDBM */
 	msr	mair_el1, mair
 	msr	tcr_el1, tcr
+
+	mrs_s	x1, SYS_ID_AA64MMFR3_EL1
+	ubfx	x1, x1, #ID_AA64MMFR3_EL1_S1PIE_SHIFT, #4
+	cbz	x1, .Lskip_indirection
+
+	mov_q	x0, PIE_E0
+	msr	REG_PIRE0_EL1, x0
+	mov_q	x0, PIE_E1
+	msr	REG_PIR_EL1, x0
+
+	mov	x0, TCR2_EL1x_PIE
+	msr	REG_TCR2_EL1, x0
+
+.Lskip_indirection:
+
 	/*
 	 * Prepare SCTLR
 	 */
-- 
2.25.1


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  parent reply	other threads:[~2023-04-13 11:20 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-13 11:04 [PATCH v2 00/19] Permission Indirection Extension Joey Gouly
2023-04-13 11:04 ` [PATCH v2 01/19] arm64/sysreg: Add ID register ID_AA64MMFR3 Joey Gouly
2023-04-13 11:14   ` Mark Brown
2023-04-13 11:25     ` Joey Gouly
2023-04-13 16:13   ` Catalin Marinas
2023-04-13 11:04 ` [PATCH v2 02/19] arm64/sysreg: add system registers TCR2_ELx Joey Gouly
2023-04-13 16:14   ` Catalin Marinas
2023-04-13 11:04 ` [PATCH v2 03/19] arm64/sysreg: update HCRX_EL2 register Joey Gouly
2023-04-13 11:20   ` Mark Brown
2023-04-13 16:14   ` Catalin Marinas
2023-04-13 11:04 ` [PATCH v2 04/19] arm64/sysreg: add PIR*_ELx registers Joey Gouly
2023-04-13 16:15   ` Catalin Marinas
2023-04-13 11:04 ` [PATCH v2 05/19] arm64: cpufeature: add system register ID_AA64MMFR3 Joey Gouly
2023-04-13 11:05 ` [PATCH v2 06/19] arm64: cpufeature: add TCR2 cpucap Joey Gouly
2023-04-13 11:25   ` Mark Brown
2023-04-13 11:05 ` [PATCH v2 07/19] arm64: cpufeature: add Permission Indirection Extension cpucap Joey Gouly
2023-04-13 11:30   ` Mark Brown
2023-04-13 11:05 ` [PATCH v2 08/19] KVM: arm64: Save/restore TCR2_EL1 Joey Gouly
2023-04-20  9:13   ` Marc Zyngier
2023-04-20 14:11     ` Joey Gouly
2023-04-13 11:05 ` [PATCH v2 09/19] KVM: arm64: Save/restore PIE registers Joey Gouly
2023-04-20  8:36   ` Marc Zyngier
2023-04-13 11:05 ` [PATCH v2 10/19] KVM: arm64: expose ID_AA64MMFR3_EL1 to guests Joey Gouly
2023-04-13 16:15   ` Catalin Marinas
2023-04-13 11:05 ` [PATCH v2 11/19] arm64: add PTE_UXN/PTE_WRITE to SWAPPER_*_FLAGS Joey Gouly
2023-04-13 16:35   ` Catalin Marinas
2023-04-20 15:29     ` Joey Gouly
2023-04-21  7:52       ` Catalin Marinas
2023-04-13 11:05 ` [PATCH v2 12/19] arm64: add PTE_WRITE to PROT_SECT_NORMAL Joey Gouly
2023-04-13 11:05 ` [PATCH v2 13/19] arm64: reorganise PAGE_/PROT_ macros Joey Gouly
2023-04-13 11:05 ` [PATCH v2 14/19] arm64: disable EL2 traps for PIE Joey Gouly
2023-04-13 16:42   ` Catalin Marinas
2023-04-13 11:05 ` [PATCH v2 15/19] arm64: add encodings of PIRx_ELx registers Joey Gouly
2023-04-18 14:02   ` Mark Brown
2023-04-13 11:05 ` Joey Gouly [this message]
2023-04-13 11:05 ` [PATCH v2 17/19] arm64: transfer permission indirection settings to EL2 Joey Gouly
2023-04-13 11:05 ` [PATCH v2 18/19] arm64: Document boot requirements for PIE Joey Gouly
2023-04-13 11:45   ` Mark Brown
2023-04-13 16:45   ` Catalin Marinas
2023-04-13 11:05 ` [PATCH v2 19/19] KVM: selftests: get-reg-list: add Permission Indirection registers Joey Gouly
2023-04-13 16:43   ` Catalin Marinas
2023-04-13 18:04   ` Mark Brown

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