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From: Maxim Levitsky <mlevitsk@redhat.com>
To: kvm@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Yang Zhong <yang.zhong@intel.com>,
	x86@kernel.org, Jim Mattson <jmattson@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Sean Christopherson <seanjc@google.com>,
	Wanpeng Li <wanpengli@tencent.com>, Shuah Khan <shuah@kernel.org>,
	Guang Zeng <guang.zeng@intel.com>, Joerg Roedel <joro@8bytes.org>,
	Maxim Levitsky <mlevitsk@redhat.com>,
	linux-kernel@vger.kernel.org,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Ingo Molnar <mingo@redhat.com>,
	linux-kselftest@vger.kernel.org,
	Kees Cook <keescook@chromium.org>,
	"H. Peter Anvin" <hpa@zytor.com>, Wei Wang <wei.w.wang@intel.com>,
	Borislav Petkov <bp@alien8.de>
Subject: [PATCH RESEND v4 20/23] KVM: svm: drop explicit return value of kvm_vcpu_map
Date: Tue, 25 Oct 2022 15:47:38 +0300	[thread overview]
Message-ID: <20221025124741.228045-21-mlevitsk@redhat.com> (raw)
In-Reply-To: <20221025124741.228045-1-mlevitsk@redhat.com>

if kvm_vcpu_map returns non zero value, error path should be triggered
regardless of the exact returned error value.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
 arch/x86/kvm/svm/svm.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 4cbb95796dcd63..b49e3f5c921c99 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -4472,8 +4472,7 @@ static int svm_enter_smm(struct kvm_vcpu *vcpu, union kvm_smram *smram)
 	 * that, see svm_prepare_switch_to_guest()) which must be
 	 * preserved.
 	 */
-	if (kvm_vcpu_map(vcpu, gpa_to_gfn(svm->nested.hsave_msr),
-			 &map_save) == -EINVAL)
+	if (kvm_vcpu_map(vcpu, gpa_to_gfn(svm->nested.hsave_msr), &map_save))
 		return 1;
 
 	BUILD_BUG_ON(offsetof(struct vmcb, save) != 0x400);
@@ -4510,11 +4509,11 @@ static int svm_leave_smm(struct kvm_vcpu *vcpu, const union kvm_smram *smram)
 		return 1;
 
 	vmcb12_gpa = GET_SMSTATE(u64, smstate, 0x7ee0);
-	if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmcb12_gpa), &map) == -EINVAL)
+	if (kvm_vcpu_map(vcpu, gpa_to_gfn(vmcb12_gpa), &map))
 		return 1;
 
 	ret = 1;
-	if (kvm_vcpu_map(vcpu, gpa_to_gfn(svm->nested.hsave_msr), &map_save) == -EINVAL)
+	if (kvm_vcpu_map(vcpu, gpa_to_gfn(svm->nested.hsave_msr), &map_save))
 		goto unmap_map;
 
 	if (svm_allocate_nested(svm))
-- 
2.34.3


  parent reply	other threads:[~2022-10-25 12:53 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-25 12:47 [PATCH RESEND v4 00/23] SMM emulation and interrupt shadow fixes Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 01/23] KVM: x86: start moving SMM-related functions to new files Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 02/23] KVM: x86: move SMM entry to a new file Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 03/23] KVM: x86: move SMM exit " Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 04/23] KVM: x86: do not go through ctxt->ops when emulating rsm Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 05/23] KVM: allow compiling out SMM support Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 06/23] KVM: x86: compile out vendor-specific code if SMM is disabled Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 07/23] KVM: x86: remove SMRAM address space if SMM is not supported Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 08/23] KVM: x86: do not define KVM_REQ_SMI if SMM disabled Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 09/23] bug: introduce ASSERT_STRUCT_OFFSET Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 10/23] KVM: x86: emulator: em_sysexit should update ctxt->mode Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 11/23] KVM: x86: emulator: introduce emulator_recalc_and_set_mode Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 12/23] KVM: x86: emulator: update the emulation mode after rsm Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 13/23] KVM: x86: emulator: update the emulation mode after CR0 write Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 14/23] KVM: x86: smm: number of GPRs in the SMRAM image depends on the image format Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 15/23] KVM: x86: smm: check for failures on smm entry Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 16/23] KVM: x86: smm: add structs for KVM's smram layout Maxim Levitsky
2022-10-28 13:34   ` Paolo Bonzini
2022-10-25 12:47 ` [PATCH RESEND v4 17/23] KVM: x86: smm: use smram structs in the common code Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 18/23] KVM: x86: smm: use smram struct for 32 bit smram load/restore Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 19/23] KVM: x86: smm: use smram struct for 64 " Maxim Levitsky
2022-10-25 12:47 ` Maxim Levitsky [this message]
2022-10-25 12:47 ` [PATCH RESEND v4 21/23] KVM: x86: SVM: use smram structs Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 22/23] KVM: x86: SVM: don't save SVM state to SMRAM when VM is not long mode capable Maxim Levitsky
2022-10-25 12:47 ` [PATCH RESEND v4 23/23] KVM: x86: smm: preserve interrupt shadow in SMRAM Maxim Levitsky
2022-10-28 10:35   ` Paolo Bonzini
2022-10-30  8:23     ` Maxim Levitsky
2022-10-27 16:49 ` [PATCH RESEND v4 00/23] SMM emulation and interrupt shadow fixes Paolo Bonzini
2022-10-27 17:06   ` Maxim Levitsky
2022-10-28 10:36     ` Paolo Bonzini
2022-10-28 22:42       ` Sean Christopherson

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