FAILED: patch "[PATCH] KVM: SVM: replace regs argument of __svm_vcpu_run() with" failed to apply to 5.15-stable tree
Subsystems (3)
[email protected]
maintainerThe patch below does not apply to the 5.15-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 <[email protected]>.
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 <[email protected]>
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.
arch/x86/kvm/Makefile +3 -0
@@ -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
arch/x86/kvm/kvm-asm-offsets.c +6 -0
@@ -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);
arch/x86/kvm/svm/svm.c +1 -1
@@ -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));
arch/x86/kvm/svm/svm.h +1 -1
@@ -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
arch/x86/kvm/svm/vmenter.S +19 -18
@@ -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. */