From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Jim Mattson <jmattson@google.com>, Marc Orr <marcorr@google.com>,
Peter Shier <pshier@google.com>, Jacob Xu <jacobhxu@google.com>,
Sean Christopherson <sean.j.christopherson@intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Sasha Levin <sashal@kernel.org>,
kvm@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 07/21] kvm: x86: Use AMD CPUID semantics for AMD vCPUs
Date: Wed, 9 Oct 2019 13:06:00 -0400 [thread overview]
Message-ID: <20191009170615.32750-7-sashal@kernel.org> (raw)
In-Reply-To: <20191009170615.32750-1-sashal@kernel.org>
From: Jim Mattson <jmattson@google.com>
[ Upstream commit 5f41a37b151f6459e0b650a2f4d1d59b6c02d1ab ]
When the guest CPUID information represents an AMD vCPU, return all
zeroes for queries of undefined CPUID leaves, whether or not they are
in range.
Signed-off-by: Jim Mattson <jmattson@google.com>
Fixes: bd22f5cfcfe8f6 ("KVM: move and fix substitue search for missing CPUID entries")
Reviewed-by: Marc Orr <marcorr@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Reviewed-by: Jacob Xu <jacobhxu@google.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/x86/kvm/cpuid.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index f3c49dc423895..3d480ec143284 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -893,9 +893,11 @@ bool kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx,
/*
* Intel CPUID semantics treats any query for an out-of-range
* leaf as if the highest basic leaf (i.e. CPUID.0H:EAX) were
- * requested.
+ * requested. AMD CPUID semantics returns all zeroes for any
+ * undefined leaf, whether or not the leaf is in range.
*/
- if (!entry && check_limit && !cpuid_function_in_range(vcpu, function)) {
+ if (!entry && check_limit && !guest_cpuid_is_amd(vcpu) &&
+ !cpuid_function_in_range(vcpu, function)) {
max = kvm_find_cpuid_entry(vcpu, 0, 0);
if (max) {
function = max->eax;
--
2.20.1
next prev parent reply other threads:[~2019-10-09 17:28 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-09 17:05 [PATCH AUTOSEL 4.14 01/21] KVM: arm/arm64: vgic: Use the appropriate TRACE_INCLUDE_PATH Sasha Levin
2019-10-09 17:05 ` [PATCH AUTOSEL 4.14 02/21] scsi: ufs: skip shutdown if hba is not powered Sasha Levin
2019-10-09 17:05 ` [PATCH AUTOSEL 4.14 03/21] scsi: megaraid: disable device when probe failed after enabled device Sasha Levin
2019-10-09 17:05 ` [PATCH AUTOSEL 4.14 04/21] scsi: qla2xxx: Fix unbound sleep in fcport delete path Sasha Levin
2019-10-09 17:05 ` [PATCH AUTOSEL 4.14 05/21] ARM: OMAP2+: Fix missing reset done flag for am3 and am43 Sasha Levin
2019-10-09 17:05 ` [PATCH AUTOSEL 4.14 06/21] kvm: x86: Improve emulation of CPUID leaves 0BH and 1FH Sasha Levin
2019-10-09 17:06 ` Sasha Levin [this message]
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 08/21] ieee802154: ca8210: prevent memory leak Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 09/21] ARM: dts: am4372: Set memory bandwidth limit for DISPC Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 10/21] net: dsa: qca8k: Use up to 7 ports for all operations Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 11/21] MIPS: dts: ar9331: fix interrupt-controller size Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 12/21] xen/efi: Set nonblocking callbacks Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 13/21] kvm: vmx: Limit guest PMCs to those supported on the host Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 14/21] nl80211: fix null pointer dereference Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 15/21] mac80211: fix txq " Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 16/21] mips: Loongson: Fix the link time qualifier of 'serial_exit()' Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 17/21] net: hisilicon: Fix usage of uninitialized variable in function mdio_sc_cfg_reg_write() Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 18/21] vfs: Fix EOVERFLOW testing in put_compat_statfs64 Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 19/21] r8152: Set macpassthru in reset_resume callback Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 20/21] namespace: fix namespace.pl script to support relative paths Sasha Levin
2019-10-09 17:06 ` [PATCH AUTOSEL 4.14 21/21] Make filldir[64]() verify the directory entry filename is valid Sasha Levin
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