From: Nicholas Piggin <npiggin@gmail.com>
To: kvm-ppc@vger.kernel.org
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
linuxppc-dev@lists.ozlabs.org,
Nicholas Piggin <npiggin@gmail.com>
Subject: [PATCH v1 05/12] KVM: PPC: Book3S HV: Prevent radix guests setting LPCR[TC]
Date: Mon, 12 Apr 2021 11:48:38 +1000 [thread overview]
Message-ID: <20210412014845.1517916-6-npiggin@gmail.com> (raw)
In-Reply-To: <20210412014845.1517916-1-npiggin@gmail.com>
Prevent radix guests setting LPCR[TC]. This bit only applies to hash
partitions.
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/kvm/book3s_hv.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 3de8a1f89a7d..70c6e9c27eb7 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -1645,6 +1645,10 @@ static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu,
*/
unsigned long kvmppc_filter_lpcr_hv(struct kvm *kvm, unsigned long lpcr)
{
+ /* LPCR_TC only applies to HPT guests */
+ if (kvm_is_radix(kvm))
+ lpcr &= ~LPCR_TC;
+
/* On POWER8 and above, userspace can modify AIL */
if (!cpu_has_feature(CPU_FTR_ARCH_207S))
lpcr &= ~LPCR_AIL;
--
2.23.0
next prev parent reply other threads:[~2021-04-12 1:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-12 1:48 [PATCH v1 00/12] minor KVM fixes and cleanups Nicholas Piggin
2021-04-12 1:48 ` [PATCH v1 01/12] KVM: PPC: Book3S HV P9: Restore host CTRL SPR after guest exit Nicholas Piggin
2021-04-12 14:06 ` Fabiano Rosas
2021-04-13 1:25 ` Nicholas Piggin
2021-04-12 1:48 ` [PATCH v1 02/12] KVM: PPC: Book3S HV: Nested move LPCR sanitising to sanitise_hv_regs Nicholas Piggin
2021-04-12 1:48 ` [PATCH v1 03/12] KVM: PPC: Book3S HV: Add a function to filter guest LPCR bits Nicholas Piggin
2021-04-12 1:48 ` [PATCH v1 04/12] KVM: PPC: Book3S HV: Disallow LPCR[AIL] to be set to 1 or 2 Nicholas Piggin
2021-04-12 1:48 ` Nicholas Piggin [this message]
2021-04-12 1:48 ` [PATCH v1 06/12] KVM: PPC: Book3S HV: Remove redundant mtspr PSPB Nicholas Piggin
2021-04-12 1:48 ` [PATCH v1 07/12] KVM: PPC: Book3S HV: remove unused kvmppc_h_protect argument Nicholas Piggin
2021-04-12 1:48 ` [PATCH v1 08/12] KVM: PPC: Book3S HV: Fix CONFIG_SPAPR_TCE_IOMMU=n default hcalls Nicholas Piggin
2021-04-12 1:48 ` [PATCH v1 09/12] powerpc/64s: Remove KVM handler support from CBE_RAS interrupts Nicholas Piggin
2021-04-12 1:48 ` [PATCH v1 10/12] powerpc/64s: remove KVM SKIP test from instruction breakpoint handler Nicholas Piggin
2021-04-12 1:48 ` [PATCH v1 11/12] KVM: PPC: Book3S HV: Ensure MSR[ME] is always set in guest MSR Nicholas Piggin
2021-04-12 1:48 ` [PATCH v1 12/12] KVM: PPC: Book3S HV: Ensure MSR[HV] is always clear " Nicholas Piggin
2021-04-16 18:34 ` Fabiano Rosas
2021-04-19 3:59 ` [PATCH v1 00/12] minor KVM fixes and cleanups Michael Ellerman
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=20210412014845.1517916-6-npiggin@gmail.com \
--to=npiggin@gmail.com \
--cc=aik@ozlabs.ru \
--cc=kvm-ppc@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
/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).