From: Dave Martin <Dave.Martin@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Szabolcs Nagy <szabolcs.nagy@arm.com>,
Richard Sandiford <richard.sandiford@arm.com>,
kvmarm@lists.cs.columbia.edu, libc-alpha@sourceware.org,
linux-arch@vger.kernel.org,
Christoffer Dall <christoffer.dall@linaro.org>,
Marc Zyngier <marc.zyngier@arm.com>
Subject: [PATCH 22/27] arm64/sve: KVM: Treat guest SVE use as undefined instruction execution
Date: Wed, 09 Aug 2017 12:08:00 -0000 [thread overview]
Message-ID: <1502280338-23002-23-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1502280338-23002-1-git-send-email-Dave.Martin@arm.com>
When trapping forbidden attempts by a guest to use SVE, we want the
guest to see a trap consistent with SVE not being implemented.
This patch injects an undefined instruction exception into the
guest in response to such an exception.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
---
arch/arm64/kvm/handle_exit.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index 17d8a16..e3e42d0 100644
--- a/arch/arm64/kvm/handle_exit.c
+++ b/arch/arm64/kvm/handle_exit.c
@@ -147,6 +147,13 @@ static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu, struct kvm_run *run)
return 1;
}
+static int handle_sve(struct kvm_vcpu *vcpu, struct kvm_run *run)
+{
+ /* Until SVE is supported for guests: */
+ kvm_inject_undefined(vcpu);
+ return 1;
+}
+
static exit_handle_fn arm_exit_handlers[] = {
[0 ... ESR_ELx_EC_MAX] = kvm_handle_unknown_ec,
[ESR_ELx_EC_WFx] = kvm_handle_wfx,
@@ -160,6 +167,7 @@ static exit_handle_fn arm_exit_handlers[] = {
[ESR_ELx_EC_HVC64] = handle_hvc,
[ESR_ELx_EC_SMC64] = handle_smc,
[ESR_ELx_EC_SYS64] = kvm_handle_sys_reg,
+ [ESR_ELx_EC_SVE] = handle_sve,
[ESR_ELx_EC_IABT_LOW] = kvm_handle_guest_abort,
[ESR_ELx_EC_DABT_LOW] = kvm_handle_guest_abort,
[ESR_ELx_EC_SOFTSTP_LOW]= kvm_handle_guest_debug,
--
2.1.4
next prev parent reply other threads:[~2017-08-09 12:08 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-09 12:05 [PATCH 00/27] ARM Scalable Vector Extension (SVE) Dave Martin
2017-08-09 12:06 ` [PATCH 05/27] arm64: fpsimd: Simplify uses of {set,clear}_ti_thread_flag() Dave Martin
2017-08-15 17:11 ` Ard Biesheuvel
2017-08-18 16:36 ` [PATCH 05/27] arm64: fpsimd: Simplify uses of {set, clear}_ti_thread_flag() Alex Bennée
2017-08-09 12:06 ` [PATCH 04/27] arm64: Port deprecated instruction emulation to new sysctl interface Dave Martin
2017-08-18 12:09 ` Alex Bennée
2017-08-09 12:06 ` [PATCH 08/27] arm64/sve: Kconfig update and conditional compilation support Dave Martin
2017-08-21 10:12 ` Alex Bennée
2017-08-09 12:06 ` [PATCH 07/27] arm64/sve: Low-level SVE architectural state manipulation functions Dave Martin
2017-08-21 10:11 ` Alex Bennée
2017-08-21 14:38 ` Dave Martin
2017-08-09 12:06 ` [PATCH 03/27] arm64: efi: Add missing Kconfig dependency on KERNEL_MODE_NEON Dave Martin
2017-08-18 12:02 ` Alex Bennée
2017-08-09 12:06 ` [PATCH 09/27] arm64/sve: Signal frame and context structure definition Dave Martin
2017-08-22 10:22 ` Alex Bennée
2017-08-22 11:17 ` Dave Martin
2017-08-22 13:53 ` Alex Bennée
2017-08-22 14:21 ` Dave Martin
2017-08-22 15:03 ` Alex Bennée
2017-08-22 15:41 ` Dave Martin
2017-08-09 12:06 ` [PATCH 02/27] arm64: KVM: Hide unsupported AArch64 CPU features from guests Dave Martin
2017-08-16 11:11 ` Marc Zyngier
2017-08-16 20:32 ` Dave Martin
2017-08-17 8:46 ` Marc Zyngier
2017-08-17 9:57 ` Dave Martin
2017-08-09 12:06 ` [PATCH 01/27] regset: Add support for dynamically sized regsets Dave Martin
2017-08-18 11:52 ` Alex Bennée
2017-08-09 12:07 ` [PATCH 17/27] arm64/sve: Preserve SVE registers around EFI runtime service calls Dave Martin
2017-08-15 17:46 ` Ard Biesheuvel
2017-08-16 9:13 ` Dave Martin
2017-08-09 12:07 ` [PATCH 15/27] arm64/sve: Probe SVE capabilities and usable vector lengths Dave Martin
2017-08-16 17:48 ` Suzuki K Poulose
2017-08-17 10:04 ` Dave Martin
2017-08-17 10:46 ` Suzuki K Poulose
2017-08-09 12:07 ` [PATCH 06/27] arm64/sve: System register and exception syndrome definitions Dave Martin
2017-08-21 9:34 ` Alex Bennée
2017-08-21 12:34 ` Alex Bennée
2017-08-21 14:26 ` Dave Martin
2017-08-21 14:50 ` Alex Bennée
2017-08-21 15:20 ` Dave Martin
2017-08-21 15:34 ` Alex Bennée
2017-08-21 13:57 ` Dave Martin
2017-08-21 14:36 ` Alex Bennée
2017-08-09 12:07 ` [PATCH 13/27] arm64/sve: Signal handling support Dave Martin
2017-08-23 9:38 ` Alex Bennée
2017-08-23 11:30 ` Dave Martin
2017-08-09 12:07 ` [PATCH 11/27] arm64/sve: Core task context handling Dave Martin
2017-08-15 17:36 ` Ard Biesheuvel
2017-08-16 10:40 ` Dave Martin
2017-08-17 16:42 ` Dave Martin
2017-08-17 16:46 ` Ard Biesheuvel
2017-08-22 16:21 ` Alex Bennée
2017-08-22 17:20 ` Dave Martin
2017-08-22 18:39 ` Alex Bennée
2017-08-09 12:07 ` [PATCH 14/27] arm64/sve: Backend logic for setting the vector length Dave Martin
2017-08-23 15:33 ` Alex Bennée
2017-08-23 17:30 ` Dave Martin
2017-08-09 12:07 ` [PATCH 10/27] arm64/sve: Low-level CPU setup Dave Martin
2017-08-22 15:04 ` Alex Bennée
2017-08-22 15:33 ` Dave Martin
2017-08-09 12:07 ` [PATCH 12/27] arm64/sve: Support vector length resetting for new processes Dave Martin
2017-08-22 16:22 ` Alex Bennée
2017-08-22 17:22 ` Dave Martin
2017-08-09 12:08 ` [PATCH 18/27] arm64/sve: ptrace and ELF coredump support Dave Martin
2017-08-09 12:08 ` [PATCH 24/27] arm64/sve: Detect SVE and activate runtime support Dave Martin
2017-08-16 17:53 ` Suzuki K Poulose
2017-08-17 10:01 ` Dave Martin
2017-08-09 12:08 ` Dave Martin [this message]
2017-08-09 12:08 ` [PATCH 23/27] arm64/sve: KVM: Hide SVE from CPU features exposed to guests Dave Martin
2017-08-15 16:38 ` Marc Zyngier
2017-08-16 10:55 ` Dave Martin
2017-08-16 11:11 ` Marc Zyngier
2017-08-16 11:22 ` Dave Martin
2017-08-09 12:08 ` [PATCH 20/27] arm64/sve: Add sysctl to set the default vector length for new processes Dave Martin
2017-08-09 12:08 ` [PATCH 16/27] arm64/sve: Preserve SVE registers around kernel-mode NEON use Dave Martin
2017-08-15 17:38 ` Ard Biesheuvel
2017-08-09 12:08 ` [RFC PATCH 27/27] arm64/sve: signal: Include SVE when computing AT_MINSIGSTKSZ Dave Martin
2017-08-09 12:08 ` [PATCH 19/27] arm64/sve: Add prctl controls for userspace vector length management Dave Martin
2017-08-09 12:08 ` [RFC PATCH 26/27] arm64: signal: Report signal frame size to userspace via auxv Dave Martin
2017-08-09 12:08 ` [PATCH 25/27] arm64/sve: Add documentation Dave Martin
2017-08-09 12:08 ` [PATCH 21/27] arm64/sve: KVM: Prevent guests from using SVE Dave Martin
2017-08-15 16:33 ` Marc Zyngier
2017-08-16 10:50 ` Dave Martin
2017-08-16 11:20 ` Marc Zyngier
2017-08-16 11:23 ` Marc Zyngier
2017-08-16 11:35 ` Dave Martin
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