Message ID | 20230927140123.5283-7-joey.gouly@arm.com (mailing list archive) |
---|---|
State | New |
Headers | show
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Wed, 27 Sep 2023 14:01:37 +0000 Received: from e124191.cambridge.arm.com (10.1.197.45) by mail.arm.com (10.251.24.31) with Microsoft SMTP Server id 15.1.2507.27 via Frontend Transport; Wed, 27 Sep 2023 14:01:36 +0000 From: Joey Gouly <joey.gouly@arm.com> To: <linux-arm-kernel@lists.infradead.org> CC: <nd@arm.com>, <akpm@linux-foundation.org>, <aneesh.kumar@linux.ibm.com>, <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> Subject: [PATCH v1 06/20] KVM: arm64: Save/restore POE registers Date: Wed, 27 Sep 2023 15:01:09 +0100 Message-ID: <20230927140123.5283-7-joey.gouly@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230927140123.5283-1-joey.gouly@arm.com> References: <20230927140123.5283-1-joey.gouly@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 1 X-MS-TrafficTypeDiagnostic: DBAEUR03FT047:EE_|AS8PR08MB8085:EE_|AM7EUR03FT042:EE_|AM8PR08MB5732:EE_ X-MS-Office365-Filtering-Correlation-Id: 4e9bfcf2-7b8c-43b9-fb77-08dbbf6274e7 x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; 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Permission Overlay Extension
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Hi Joey,
On Wed, Sep 27, 2023 at 03:01:09PM +0100, Joey Gouly wrote:
> Define the new system registers that POE introduces and context switch them.
I'm not seeing the latter part in the diff. I was anticipating that the
POE context switching hooks into __sysreg_{save,restore}_{el1,user}_state() like
we do for most other bits of sysreg context.
--
Thanks,
Oliver
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index af06ccb7ee34..205653bc5c2c 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -365,6 +365,10 @@ enum vcpu_sysreg { PIR_EL1, /* Permission Indirection Register 1 (EL1) */ PIRE0_EL1, /* Permission Indirection Register 0 (EL1) */ + /* Permission Overlay Extension registers */ + POR_EL1, /* Permission Overlay Register 1 (EL1) */ + POR_EL0, /* Permission Overlay Register 0 (EL0) */ + /* 32bit specific registers. */ DACR32_EL2, /* Domain Access Control Register */ IFSR32_EL2, /* Instruction Fault Status Register */ diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index e92ec810d449..dbaddadd2a1c 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2124,6 +2124,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { { SYS_DESC(SYS_MAIR_EL1), access_vm_reg, reset_unknown, MAIR_EL1 }, { SYS_DESC(SYS_PIRE0_EL1), access_vm_reg, reset_unknown, PIRE0_EL1 }, { SYS_DESC(SYS_PIR_EL1), access_vm_reg, reset_unknown, PIR_EL1 }, + { SYS_DESC(SYS_POR_EL1), access_vm_reg, reset_unknown, POR_EL1 }, { SYS_DESC(SYS_AMAIR_EL1), access_vm_reg, reset_amair_el1, AMAIR_EL1 }, { SYS_DESC(SYS_LORSA_EL1), trap_loregion }, @@ -2203,6 +2204,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { { PMU_SYS_REG(PMOVSSET_EL0), .access = access_pmovs, .reg = PMOVSSET_EL0 }, + { SYS_DESC(SYS_POR_EL0), access_vm_reg, reset_unknown, POR_EL0 }, { SYS_DESC(SYS_TPIDR_EL0), NULL, reset_unknown, TPIDR_EL0 }, { SYS_DESC(SYS_TPIDRRO_EL0), NULL, reset_unknown, TPIDRRO_EL0 }, { SYS_DESC(SYS_TPIDR2_EL0), undef_access },
Define the new system registers that POE introduces and context switch them. Signed-off-by: Joey Gouly <joey.gouly@arm.com> Cc: Marc Zyngier <maz@kernel.org> Cc: Oliver Upton <oliver.upton@linux.dev> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> --- arch/arm64/include/asm/kvm_host.h | 4 ++++ arch/arm64/kvm/sys_regs.c | 2 ++ 2 files changed, 6 insertions(+)