From: Marc Zyngier <marc.zyngier@arm.com> To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Cc: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com> Subject: [PATCH v2 19/19] arm64: Update the KVM memory map documentation Date: Mon, 11 Dec 2017 14:49:37 +0000 [thread overview] Message-ID: <20171211144937.4537-20-marc.zyngier@arm.com> (raw) In-Reply-To: <20171211144937.4537-1-marc.zyngier@arm.com> Update the documentation to reflect the new tricks we play on the EL2 mappings... Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- Documentation/arm64/memory.txt | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/Documentation/arm64/memory.txt b/Documentation/arm64/memory.txt index 671bc0639262..ea64e20037f6 100644 --- a/Documentation/arm64/memory.txt +++ b/Documentation/arm64/memory.txt @@ -86,9 +86,11 @@ Translation table lookup with 64KB pages: +-------------------------------------------------> [63] TTBR0/1 -When using KVM without the Virtualization Host Extensions, the hypervisor -maps kernel pages in EL2 at a fixed offset from the kernel VA. See the -kern_hyp_va macro for more details. +When using KVM without the Virtualization Host Extensions, the +hypervisor maps kernel pages in EL2 at a fixed offset (modulo a random +offset) from the linear mapping. See the kern_hyp_va macro and +kvm_update_va_mask function for more details. MMIO devices such as +GICv2 gets mapped next to the HYP idmap page. When using KVM with the Virtualization Host Extensions, no additional mappings are created, since the host kernel runs directly in EL2. -- 2.14.2
WARNING: multiple messages have this Message-ID (diff)
From: marc.zyngier@arm.com (Marc Zyngier) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 19/19] arm64: Update the KVM memory map documentation Date: Mon, 11 Dec 2017 14:49:37 +0000 [thread overview] Message-ID: <20171211144937.4537-20-marc.zyngier@arm.com> (raw) In-Reply-To: <20171211144937.4537-1-marc.zyngier@arm.com> Update the documentation to reflect the new tricks we play on the EL2 mappings... Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- Documentation/arm64/memory.txt | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/Documentation/arm64/memory.txt b/Documentation/arm64/memory.txt index 671bc0639262..ea64e20037f6 100644 --- a/Documentation/arm64/memory.txt +++ b/Documentation/arm64/memory.txt @@ -86,9 +86,11 @@ Translation table lookup with 64KB pages: +-------------------------------------------------> [63] TTBR0/1 -When using KVM without the Virtualization Host Extensions, the hypervisor -maps kernel pages in EL2 at a fixed offset from the kernel VA. See the -kern_hyp_va macro for more details. +When using KVM without the Virtualization Host Extensions, the +hypervisor maps kernel pages in EL2 at a fixed offset (modulo a random +offset) from the linear mapping. See the kern_hyp_va macro and +kvm_update_va_mask function for more details. MMIO devices such as +GICv2 gets mapped next to the HYP idmap page. When using KVM with the Virtualization Host Extensions, no additional mappings are created, since the host kernel runs directly in EL2. -- 2.14.2
next prev parent reply other threads:[~2017-12-11 14:49 UTC|newest] Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-12-11 14:49 [PATCH v2 00/19] KVM/arm64: Randomise EL2 mappings Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 01/19] arm64: asm-offsets: Avoid clashing DMA definitions Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 15:03 ` Russell King - ARM Linux 2017-12-11 15:03 ` Russell King - ARM Linux 2017-12-11 15:22 ` Marc Zyngier 2017-12-11 15:22 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 02/19] arm64: asm-offsets: Remove unused definitions Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 03/19] arm64: asm-offsets: Remove potential circular dependency Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 04/19] arm64: alternatives: Enforce alignment of struct alt_instr Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 05/19] arm64: alternatives: Add dynamic patching feature Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-13 17:53 ` Catalin Marinas 2017-12-13 17:53 ` Catalin Marinas 2017-12-14 12:22 ` Marc Zyngier 2017-12-14 12:22 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 06/19] arm64: insn: Add N immediate encoding Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 07/19] arm64: insn: Add encoder for bitwise operations using litterals Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-12 18:32 ` James Morse 2017-12-12 18:32 ` James Morse 2017-12-12 23:40 ` Peter Maydell 2017-12-12 23:40 ` Peter Maydell 2017-12-13 14:32 ` Marc Zyngier 2017-12-13 14:32 ` Marc Zyngier 2017-12-13 15:45 ` James Morse 2017-12-13 15:45 ` James Morse 2017-12-13 15:52 ` Marc Zyngier 2017-12-13 15:52 ` Marc Zyngier 2017-12-14 8:40 ` Marc Zyngier 2017-12-14 8:40 ` Marc Zyngier 2017-12-12 18:56 ` Peter Maydell 2017-12-12 18:56 ` Peter Maydell 2017-12-11 14:49 ` [PATCH v2 08/19] arm64: KVM: Dynamically patch the kernel/hyp VA mask Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-14 13:17 ` James Morse 2017-12-14 13:17 ` James Morse 2017-12-14 13:27 ` Marc Zyngier 2017-12-14 13:27 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 09/19] arm64: cpufeatures: Drop the ARM64_HYP_OFFSET_LOW feature flag Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 10/19] KVM: arm/arm64: Do not use kern_hyp_va() with kvm_vgic_global_state Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 11/19] KVM: arm/arm64: Demote HYP VA range display to being a debug feature Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 12/19] KVM: arm/arm64: Move ioremap calls to create_hyp_io_mappings Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 13/19] KVM: arm/arm64: Keep GICv2 HYP VAs in kvm_vgic_global_state Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 14/19] KVM: arm/arm64: Move HYP IO VAs to the "idmap" range Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 15/19] arm64; insn: Add encoder for the EXTR instruction Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 16/19] arm64: insn: Allow ADD/SUB (immediate) with LSL #12 Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 17/19] arm64: KVM: Dynamically compute the HYP VA mask Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` [PATCH v2 18/19] arm64: KVM: Introduce EL2 VA randomisation Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier 2017-12-11 14:49 ` Marc Zyngier [this message] 2017-12-11 14:49 ` [PATCH v2 19/19] arm64: Update the KVM memory map documentation Marc Zyngier
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