From: <gregkh@linuxfoundation.org>
To: pbonzini@redhat.com, seanjc@google.com
Cc: <stable@vger.kernel.org>
Subject: FAILED: patch "[PATCH] KVM: SVM: replace regs argument of __svm_vcpu_run() with" failed to apply to 5.10-stable tree
Date: Mon, 14 Nov 2022 11:59:12 +0100 [thread overview]
Message-ID: <1668423552223218@kroah.com> (raw)
The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.
Possible dependencies:
16fdc1de169e ("KVM: SVM: replace regs argument of __svm_vcpu_run() with vcpu_svm")
debc5a1ec0d1 ("KVM: x86: use a separate asm-offsets.c file")
bb06650634d3 ("KVM: VMX: Convert launched argument to flags")
8bd200d23ec4 ("KVM: VMX: Flatten __vmx_vcpu_run()")
527a534c7326 ("x86/tdx: Provide common base for SEAMCALL and TDCALL C wrappers")
59bd54a84d15 ("x86/tdx: Detect running as a TDX guest in early boot")
6198311093da ("x86/cc: Move arch/x86/{kernel/cc_platform.c => coco/core.c}")
f94909ceb1ed ("x86: Prepare asm files for straight-line-speculation")
22da5a07c75e ("x86/lib/atomic64_386_32: Rename things")
1367afaa2ee9 ("x86/entry: Use the correct fence macro after swapgs in kernel CR3")
c07e45553da1 ("x86/entry: Add a fence for kernel entry SWAPGS in paranoid_entry()")
6e5772c8d9cf ("Merge tag 'x86_cc_for_v5.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 16fdc1de169ee0a4e59a8c02244414ec7acd55c3 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri, 30 Sep 2022 14:14:44 -0400
Subject: [PATCH] KVM: SVM: replace regs argument of __svm_vcpu_run() with
vcpu_svm
Since registers are reachable through vcpu_svm, and we will
need to access more fields of that struct, pass it instead
of the regs[] array.
No functional change intended.
Cc: stable@vger.kernel.org
Fixes: a149180fbcf3 ("x86: Add magic AMD return-thunk")
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index a02cf9baacc8..f453a0f96e24 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -35,6 +35,9 @@ obj-$(CONFIG_KVM) += kvm.o
obj-$(CONFIG_KVM_INTEL) += kvm-intel.o
obj-$(CONFIG_KVM_AMD) += kvm-amd.o
+AFLAGS_svm/vmenter.o := -iquote $(obj)
+$(obj)/svm/vmenter.o: $(obj)/kvm-asm-offsets.h
+
AFLAGS_vmx/vmenter.o := -iquote $(obj)
$(obj)/vmx/vmenter.o: $(obj)/kvm-asm-offsets.h
diff --git a/arch/x86/kvm/kvm-asm-offsets.c b/arch/x86/kvm/kvm-asm-offsets.c
index 9d84f2b32d7f..30db96852e2d 100644
--- a/arch/x86/kvm/kvm-asm-offsets.c
+++ b/arch/x86/kvm/kvm-asm-offsets.c
@@ -8,9 +8,15 @@
#include <linux/kbuild.h>
#include "vmx/vmx.h"
+#include "svm/svm.h"
static void __used common(void)
{
+ if (IS_ENABLED(CONFIG_KVM_AMD)) {
+ BLANK();
+ OFFSET(SVM_vcpu_arch_regs, vcpu_svm, vcpu.arch.regs);
+ }
+
if (IS_ENABLED(CONFIG_KVM_INTEL)) {
BLANK();
OFFSET(VMX_spec_ctrl, vcpu_vmx, spec_ctrl);
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 58f0077d9357..b412bc5773c5 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -3930,7 +3930,7 @@ static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu)
* vmcb02 when switching vmcbs for nested virtualization.
*/
vmload(svm->vmcb01.pa);
- __svm_vcpu_run(vmcb_pa, (unsigned long *)&vcpu->arch.regs);
+ __svm_vcpu_run(vmcb_pa, svm);
vmsave(svm->vmcb01.pa);
vmload(__sme_page_pa(sd->save_area));
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 6a7686bf6900..447e25c9101a 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -684,6 +684,6 @@ void sev_es_unmap_ghcb(struct vcpu_svm *svm);
/* vmenter.S */
void __svm_sev_es_vcpu_run(unsigned long vmcb_pa);
-void __svm_vcpu_run(unsigned long vmcb_pa, unsigned long *regs);
+void __svm_vcpu_run(unsigned long vmcb_pa, struct vcpu_svm *svm);
#endif
diff --git a/arch/x86/kvm/svm/vmenter.S b/arch/x86/kvm/svm/vmenter.S
index 723f8534986c..f0ff41103e4c 100644
--- a/arch/x86/kvm/svm/vmenter.S
+++ b/arch/x86/kvm/svm/vmenter.S
@@ -4,27 +4,28 @@
#include <asm/bitsperlong.h>
#include <asm/kvm_vcpu_regs.h>
#include <asm/nospec-branch.h>
+#include "kvm-asm-offsets.h"
#define WORD_SIZE (BITS_PER_LONG / 8)
/* Intentionally omit RAX as it's context switched by hardware */
-#define VCPU_RCX __VCPU_REGS_RCX * WORD_SIZE
-#define VCPU_RDX __VCPU_REGS_RDX * WORD_SIZE
-#define VCPU_RBX __VCPU_REGS_RBX * WORD_SIZE
+#define VCPU_RCX (SVM_vcpu_arch_regs + __VCPU_REGS_RCX * WORD_SIZE)
+#define VCPU_RDX (SVM_vcpu_arch_regs + __VCPU_REGS_RDX * WORD_SIZE)
+#define VCPU_RBX (SVM_vcpu_arch_regs + __VCPU_REGS_RBX * WORD_SIZE)
/* Intentionally omit RSP as it's context switched by hardware */
-#define VCPU_RBP __VCPU_REGS_RBP * WORD_SIZE
-#define VCPU_RSI __VCPU_REGS_RSI * WORD_SIZE
-#define VCPU_RDI __VCPU_REGS_RDI * WORD_SIZE
+#define VCPU_RBP (SVM_vcpu_arch_regs + __VCPU_REGS_RBP * WORD_SIZE)
+#define VCPU_RSI (SVM_vcpu_arch_regs + __VCPU_REGS_RSI * WORD_SIZE)
+#define VCPU_RDI (SVM_vcpu_arch_regs + __VCPU_REGS_RDI * WORD_SIZE)
#ifdef CONFIG_X86_64
-#define VCPU_R8 __VCPU_REGS_R8 * WORD_SIZE
-#define VCPU_R9 __VCPU_REGS_R9 * WORD_SIZE
-#define VCPU_R10 __VCPU_REGS_R10 * WORD_SIZE
-#define VCPU_R11 __VCPU_REGS_R11 * WORD_SIZE
-#define VCPU_R12 __VCPU_REGS_R12 * WORD_SIZE
-#define VCPU_R13 __VCPU_REGS_R13 * WORD_SIZE
-#define VCPU_R14 __VCPU_REGS_R14 * WORD_SIZE
-#define VCPU_R15 __VCPU_REGS_R15 * WORD_SIZE
+#define VCPU_R8 (SVM_vcpu_arch_regs + __VCPU_REGS_R8 * WORD_SIZE)
+#define VCPU_R9 (SVM_vcpu_arch_regs + __VCPU_REGS_R9 * WORD_SIZE)
+#define VCPU_R10 (SVM_vcpu_arch_regs + __VCPU_REGS_R10 * WORD_SIZE)
+#define VCPU_R11 (SVM_vcpu_arch_regs + __VCPU_REGS_R11 * WORD_SIZE)
+#define VCPU_R12 (SVM_vcpu_arch_regs + __VCPU_REGS_R12 * WORD_SIZE)
+#define VCPU_R13 (SVM_vcpu_arch_regs + __VCPU_REGS_R13 * WORD_SIZE)
+#define VCPU_R14 (SVM_vcpu_arch_regs + __VCPU_REGS_R14 * WORD_SIZE)
+#define VCPU_R15 (SVM_vcpu_arch_regs + __VCPU_REGS_R15 * WORD_SIZE)
#endif
.section .noinstr.text, "ax"
@@ -32,7 +33,7 @@
/**
* __svm_vcpu_run - Run a vCPU via a transition to SVM guest mode
* @vmcb_pa: unsigned long
- * @regs: unsigned long * (to guest registers)
+ * @svm: struct vcpu_svm *
*/
SYM_FUNC_START(__svm_vcpu_run)
push %_ASM_BP
@@ -47,13 +48,13 @@ SYM_FUNC_START(__svm_vcpu_run)
#endif
push %_ASM_BX
- /* Save @regs. */
+ /* Save @svm. */
push %_ASM_ARG2
/* Save @vmcb. */
push %_ASM_ARG1
- /* Move @regs to RAX. */
+ /* Move @svm to RAX. */
mov %_ASM_ARG2, %_ASM_AX
/* Load guest registers. */
@@ -89,7 +90,7 @@ SYM_FUNC_START(__svm_vcpu_run)
FILL_RETURN_BUFFER %_ASM_AX, RSB_CLEAR_LOOPS, X86_FEATURE_RETPOLINE
#endif
- /* "POP" @regs to RAX. */
+ /* "POP" @svm to RAX. */
pop %_ASM_AX
/* Save all guest registers. */
reply other threads:[~2022-11-14 10:59 UTC|newest]
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