From: Dave Martin <Dave.Martin@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-arch@vger.kernel.org,
Okamoto Takayuki <tokamoto@jp.fujitsu.com>,
libc-alpha@sourceware.org,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Szabolcs Nagy <szabolcs.nagy@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
kvmarm@lists.cs.columbia.edu
Subject: [PATCH v4 23/28] arm64/sve: KVM: Treat guest SVE use as undefined instruction execution
Date: Fri, 27 Oct 2017 11:51:05 +0100 [thread overview]
Message-ID: <1509101470-7881-24-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1509101470-7881-1-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>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
---
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 7debb74..b712479 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
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
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>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Szabolcs Nagy" <szabolcs.nagy@arm.com>,
"Okamoto Takayuki" <tokamoto@jp.fujitsu.com>,
kvmarm@lists.cs.columbia.edu, libc-alpha@sourceware.org,
linux-arch@vger.kernel.org
Subject: [PATCH v4 23/28] arm64/sve: KVM: Treat guest SVE use as undefined instruction execution
Date: Fri, 27 Oct 2017 11:51:05 +0100 [thread overview]
Message-ID: <1509101470-7881-24-git-send-email-Dave.Martin@arm.com> (raw)
Message-ID: <20171027105105.c9D3Q_uAU77tc6_bsqneEa2yQ3x8E95O7yeYTy0cWcc@z> (raw)
In-Reply-To: <1509101470-7881-1-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>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
---
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 7debb74..b712479 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:[~2017-10-27 10:51 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-27 10:50 [PATCH v4 00/28] ARM Scalable Vector Extension (SVE) Dave Martin
2017-10-27 10:50 ` [PATCH v4 01/28] regset: Add support for dynamically sized regsets Dave Martin
2017-10-27 10:50 ` Dave Martin
2017-10-27 10:50 ` [PATCH v4 02/28] arm64: KVM: Hide unsupported AArch64 CPU features from guests Dave Martin
2017-10-27 10:50 ` Dave Martin
2017-10-31 10:57 ` Alex Bennée
2017-10-31 10:57 ` Alex Bennée
2017-10-27 10:50 ` [PATCH v4 03/28] arm64: efi: Add missing Kconfig dependency on KERNEL_MODE_NEON Dave Martin
2017-10-27 10:50 ` [PATCH v4 04/28] arm64: Port deprecated instruction emulation to new sysctl interface Dave Martin
2017-10-27 10:50 ` Dave Martin
2017-10-27 10:50 ` [PATCH v4 05/28] arm64: fpsimd: Simplify uses of {set, clear}_ti_thread_flag() Dave Martin
2017-10-27 10:50 ` [PATCH v4 05/28] arm64: fpsimd: Simplify uses of {set,clear}_ti_thread_flag() Dave Martin
2017-10-27 10:50 ` [PATCH v4 06/28] arm64/sve: System register and exception syndrome definitions Dave Martin
2017-10-27 10:50 ` [PATCH v4 07/28] arm64/sve: Low-level SVE architectural state manipulation functions Dave Martin
2017-10-27 10:50 ` [PATCH v4 08/28] arm64/sve: Kconfig update and conditional compilation support Dave Martin
2017-10-27 10:50 ` [PATCH v4 09/28] arm64/sve: Signal frame and context structure definition Dave Martin
2017-10-27 10:50 ` Dave Martin
2017-10-27 10:50 ` [PATCH v4 10/28] arm64/sve: Low-level CPU setup Dave Martin
2017-10-27 10:50 ` [PATCH v4 11/28] arm64/sve: Core task context handling Dave Martin
2017-10-27 10:50 ` Dave Martin
2017-10-27 12:45 ` Catalin Marinas
2017-10-27 12:45 ` Catalin Marinas
2017-10-27 10:50 ` [PATCH v4 12/28] arm64/sve: Support vector length resetting for new processes Dave Martin
2017-10-27 10:50 ` [PATCH v4 13/28] arm64/sve: Signal handling support Dave Martin
2017-10-27 10:50 ` Dave Martin
2017-10-27 12:54 ` Catalin Marinas
2017-10-27 10:50 ` [PATCH v4 14/28] arm64/sve: Backend logic for setting the vector length Dave Martin
2017-10-27 10:50 ` [PATCH v4 15/28] arm64: cpufeature: Move sys_caps_initialised declarations Dave Martin
2017-10-27 10:50 ` [PATCH v4 16/28] arm64/sve: Probe SVE capabilities and usable vector lengths Dave Martin
2017-10-27 10:50 ` Dave Martin
2017-10-27 12:56 ` Catalin Marinas
2017-10-27 12:56 ` Catalin Marinas
2017-10-27 10:50 ` [PATCH v4 17/28] arm64/sve: Preserve SVE registers around kernel-mode NEON use Dave Martin
2017-10-27 10:50 ` Dave Martin
2017-10-27 10:51 ` [PATCH v4 18/28] arm64/sve: Preserve SVE registers around EFI runtime service calls Dave Martin
2017-10-27 10:51 ` Dave Martin
2017-10-27 10:51 ` [PATCH v4 19/28] arm64/sve: ptrace and ELF coredump support Dave Martin
2017-10-27 13:04 ` Catalin Marinas
2017-10-27 13:04 ` Catalin Marinas
2017-10-27 10:51 ` [PATCH v4 20/28] arm64/sve: Add prctl controls for userspace vector length management Dave Martin
2017-10-27 10:51 ` Dave Martin
2017-10-27 17:52 ` Alex Bennée
2017-10-27 17:52 ` Alex Bennée
2017-10-28 16:05 ` Dave Martin
2017-10-30 16:12 ` Alex Bennée
2017-10-30 16:12 ` Alex Bennée
2017-10-30 16:17 ` Dave Martin
2017-10-30 16:17 ` Dave Martin
2017-10-27 10:51 ` [PATCH v4 21/28] arm64/sve: Add sysctl to set the default vector length for new processes Dave Martin
2017-10-27 10:51 ` [PATCH v4 22/28] arm64/sve: KVM: Prevent guests from using SVE Dave Martin
2017-10-27 10:51 ` Dave Martin [this message]
2017-10-27 10:51 ` [PATCH v4 23/28] arm64/sve: KVM: Treat guest SVE use as undefined instruction execution Dave Martin
2017-10-27 10:51 ` [PATCH v4 24/28] arm64/sve: KVM: Hide SVE from CPU features exposed to guests Dave Martin
2017-10-27 10:51 ` [PATCH v4 25/28] arm64/sve: Detect SVE and activate runtime support Dave Martin
2017-10-27 13:05 ` Catalin Marinas
2017-10-27 10:51 ` [PATCH v4 26/28] arm64/sve: Add documentation Dave Martin
2017-10-27 13:06 ` Catalin Marinas
2017-10-27 10:51 ` [RFC PATCH v4 27/28] arm64: signal: Report signal frame size to userspace via auxv Dave Martin
2017-10-27 10:51 ` Dave Martin
2017-10-27 10:51 ` [RFC PATCH v4 28/28] arm64/sve: signal: Include SVE when computing AT_MINSIGSTKSZ Dave Martin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1509101470-7881-24-git-send-email-Dave.Martin@arm.com \
--to=dave.martin@arm.com \
--cc=ard.biesheuvel@linaro.org \
--cc=catalin.marinas@arm.com \
--cc=kvmarm@lists.cs.columbia.edu \
--cc=libc-alpha@sourceware.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=szabolcs.nagy@arm.com \
--cc=tokamoto@jp.fujitsu.com \
--cc=will.deacon@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).