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From: Alexandru Elisei <alexandru.elisei@arm.com>
To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu
Cc: maz@kernel.org, andre.przywara@arm.com, pbonzini@redhat.com
Subject: [kvm-unit-tests RFC PATCH 15/16] arm64: selftest: Expand EL2 test to disable and re-enable VHE
Date: Wed, 28 Aug 2019 14:38:30 +0100
Message-ID: <1566999511-24916-16-git-send-email-alexandru.elisei@arm.com> (raw)
In-Reply-To: <1566999511-24916-1-git-send-email-alexandru.elisei@arm.com>

Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
---
KVM doesn't deal with a guest running with VHE enabled, then disabling it
[1]. I also proposed a fix [1] for it.

[1] https://www.spinics.net/lists/arm-kernel/msg749823.html

 arm/selftest.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arm/selftest.c b/arm/selftest.c
index 211bc8a5642b..4a6c943497ee 100644
--- a/arm/selftest.c
+++ b/arm/selftest.c
@@ -395,6 +395,18 @@ static void check_el2_cpu(void *data __unused)
 	report("CPU(%3d) Running at EL2", current_level() == CurrentEL_EL2, cpu);
 	report("CPU(%3d) VHE supported and enabled",
 			vhe_supported() && vhe_enabled(), cpu);
+
+	report_info("CPU(%3d) Disabling VHE", cpu);
+	disable_vhe();
+
+	report("CPU(%3d) Running at EL2", current_level() == CurrentEL_EL2, cpu);
+	report("CPU(%3d) VHE disabled", !vhe_enabled(), cpu);
+
+	report_info("CPU(%3d) Re-enabling VHE", cpu);
+	enable_vhe();
+
+	report("CPU(%3d) Running at EL2", current_level() == CurrentEL_EL2, cpu);
+	report("CPU(%3d) VHE enabled", vhe_enabled(), cpu);
 }
 
 static bool psci_check(void);
-- 
2.7.4

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  parent reply index

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-28 13:38 [kvm-unit-tests RFC PATCH 00/16] arm64: Run at EL2 Alexandru Elisei
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 01/16] arm: selftest.c: Remove redundant check for Exception Level Alexandru Elisei
2019-08-28 14:32   ` Andrew Jones
2019-08-28 15:39     ` Alexandru Elisei
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 02/16] arm/arm64: psci: Don't run C code without stack or vectors Alexandru Elisei
2019-08-28 14:45   ` Andrew Jones
2019-08-28 15:14     ` Alexandru Elisei
2019-09-02 14:55       ` Alexandru Elisei
2019-09-03  6:37         ` Andrew Jones
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 03/16] lib: arm/arm64: Add missing include for alloc_page.h in pgtable.h Alexandru Elisei
2019-08-28 14:47   ` Andrew Jones
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 04/16] arm/arm64: selftest: Add prefetch abort test Alexandru Elisei
2019-08-28 14:09   ` Mark Rutland
2019-08-29  8:18     ` Alexandru Elisei
2019-08-29 10:19       ` Mark Rutland
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 05/16] arm64: timer: Write to ICENABLER to disable timer IRQ Alexandru Elisei
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 06/16] arm64: timer: EOIR the interrupt after masking the timer Alexandru Elisei
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 07/16] arm64: timer: Test behavior when timer disabled or masked Alexandru Elisei
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 08/16] lib: arm/arm64: Refuse to disable the MMU with non-identity stack pointer Alexandru Elisei
2019-08-28 14:55   ` Andrew Jones
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 09/16] lib: arm/arm64: Invalidate TLB before enabling MMU Alexandru Elisei
2019-08-28 14:59   ` Andrew Jones
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 10/16] lib: Add UL and ULL definitions to linux/const.h Alexandru Elisei
2019-08-28 15:10   ` Andrew Jones
2019-08-28 15:46     ` Alexandru Elisei
2019-08-28 16:19       ` Andrew Jones
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 11/16] lib: arm64: Run existing tests at EL2 Alexandru Elisei
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 12/16] arm64: timer: Add test for EL2 timers Alexandru Elisei
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 13/16] arm64: selftest: Add basic test for EL2 Alexandru Elisei
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 14/16] lib: arm64: Add support for disabling and re-enabling VHE Alexandru Elisei
2019-08-28 14:19   ` Mark Rutland
2019-08-29  8:36     ` Alexandru Elisei
2019-08-28 13:38 ` Alexandru Elisei [this message]
2019-08-28 13:38 ` [kvm-unit-tests RFC PATCH 16/16] arm64: timer: Run tests with VHE disabled Alexandru Elisei

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