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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 15/18] KVM: arm/arm64: Demote HYP VA range display to being a debug feature
Date: Wed,  6 Dec 2017 14:38:36 +0000	[thread overview]
Message-ID: <20171206143839.29223-16-marc.zyngier@arm.com> (raw)
In-Reply-To: <20171206143839.29223-1-marc.zyngier@arm.com>

Displaying the HYP VA information is slightly counterproductive when
using VA randomization. Turn it into a debug feature only, and adjust
the last displayed value to reflect the top of RAM instead of ~0.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
 virt/kvm/arm/mmu.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index e60605c3603e..326f257d6008 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -1762,9 +1762,10 @@ int kvm_mmu_init(void)
 	 */
 	BUG_ON((hyp_idmap_start ^ (hyp_idmap_end - 1)) & PAGE_MASK);
 
-	kvm_info("IDMAP page: %lx\n", hyp_idmap_start);
-	kvm_info("HYP VA range: %lx:%lx\n",
-		 kern_hyp_va(PAGE_OFFSET), kern_hyp_va(~0UL));
+	kvm_debug("IDMAP page: %lx\n", hyp_idmap_start);
+	kvm_debug("HYP VA range: %lx:%lx\n",
+		  kern_hyp_va(PAGE_OFFSET),
+		  kern_hyp_va((unsigned long)high_memory - 1));
 
 	if (hyp_idmap_start >= kern_hyp_va(PAGE_OFFSET) &&
 	    hyp_idmap_start <  kern_hyp_va((unsigned long)high_memory - 1) &&
-- 
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 15/18] KVM: arm/arm64: Demote HYP VA range display to being a debug feature
Date: Wed,  6 Dec 2017 14:38:36 +0000	[thread overview]
Message-ID: <20171206143839.29223-16-marc.zyngier@arm.com> (raw)
In-Reply-To: <20171206143839.29223-1-marc.zyngier@arm.com>

Displaying the HYP VA information is slightly counterproductive when
using VA randomization. Turn it into a debug feature only, and adjust
the last displayed value to reflect the top of RAM instead of ~0.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
 virt/kvm/arm/mmu.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index e60605c3603e..326f257d6008 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -1762,9 +1762,10 @@ int kvm_mmu_init(void)
 	 */
 	BUG_ON((hyp_idmap_start ^ (hyp_idmap_end - 1)) & PAGE_MASK);
 
-	kvm_info("IDMAP page: %lx\n", hyp_idmap_start);
-	kvm_info("HYP VA range: %lx:%lx\n",
-		 kern_hyp_va(PAGE_OFFSET), kern_hyp_va(~0UL));
+	kvm_debug("IDMAP page: %lx\n", hyp_idmap_start);
+	kvm_debug("HYP VA range: %lx:%lx\n",
+		  kern_hyp_va(PAGE_OFFSET),
+		  kern_hyp_va((unsigned long)high_memory - 1));
 
 	if (hyp_idmap_start >= kern_hyp_va(PAGE_OFFSET) &&
 	    hyp_idmap_start <  kern_hyp_va((unsigned long)high_memory - 1) &&
-- 
2.14.2

  parent reply	other threads:[~2017-12-06 14:38 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-06 14:38 [PATCH 00/18] KVM/arm64: Randomise EL2 mappings Marc Zyngier
2017-12-06 14:38 ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 01/18] arm64: asm-offsets: Avoid clashing DMA definitions Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 02/18] arm64: asm-offsets: Remove unused definitions Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 03/18] arm64: asm-offsets: Remove potential circular dependency Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 04/18] arm64: alternatives: Enforce alignment of struct alt_instr Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:48   ` Konrad Rzeszutek Wilk
2017-12-06 14:48     ` Konrad Rzeszutek Wilk
2017-12-06 14:57     ` Marc Zyngier
2017-12-06 14:57       ` Marc Zyngier
2017-12-06 15:18       ` Konrad Rzeszutek Wilk
2017-12-06 15:18         ` Konrad Rzeszutek Wilk
2017-12-06 15:39         ` Marc Zyngier
2017-12-06 15:39           ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 05/18] arm64: alternatives: Add dynamic patching feature Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 06/18] arm64: insn: Add N immediate encoding Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 07/18] arm64: insn: Add encoder for bitwise operations using litterals Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 08/18] arm64: KVM: Dynamically patch the kernel/hyp VA mask Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 09/18] arm64: cpufeatures: Drop the ARM64_HYP_OFFSET_LOW feature flag Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 10/18] arm64; insn: Add encoder for the EXTR instruction Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 11/18] arm64: insn: Allow ADD/SUB (immediate) with LSL #12 Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 12/18] arm64: KVM: Introduce EL2 VA randomisation Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 13/18] arm64: Update the KVM memory map documentation Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 14/18] KVM: arm/arm64: Do not use kern_hyp_va() with kvm_vgic_global_state Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` Marc Zyngier [this message]
2017-12-06 14:38   ` [PATCH 15/18] KVM: arm/arm64: Demote HYP VA range display to being a debug feature Marc Zyngier
2017-12-06 14:38 ` [PATCH 16/18] KVM: arm/arm64: Move ioremap calls to create_hyp_io_mappings Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 17/18] KVM: arm/arm64: Keep GICv2 HYP VAs in kvm_vgic_global_state Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier
2017-12-06 14:38 ` [PATCH 18/18] KVM: arm/arm64: Move HYP IO VAs to the "idmap" range Marc Zyngier
2017-12-06 14:38   ` Marc Zyngier

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