Re: [kvm-unit-tests GIT PULL] x86: random smattering of changes

[Sean Christopherson <seanjc@google.com>]

On Wed, May 27, 2026, Yosry Ahmed wrote:
> > > ----------------------------------------------------------------
> > > Isaku Yamahata (2):
> > >       x86: Replace NOP with CPUID after WRMSR(TSCDEADLINE) to serialize deadline timer
> > >       x86: tscdeadline_latency: Remove unnecessary nop
> > >
> > > Jim Mattson (1):
> > >       x86: nVMX: Add retry loop to advanced RTM debugging subtest
> > >
> > > Kevin Cheng (2):
> > >       x86/svm: Add missing svm intercepts
> > >       x86/svm: Add unsupported instruction intercept test
> >
> > Any reason not to include this series:
> > https://lore.kernel.org/kvm/20260312200308.3089379-1-chengkev@google.com/?

I ran out of steam (and time), and I don't want to merge like this without a high
level of confidence that it's the least awful option.

+asm(
+	"insn_sidt: sidt idt_descr;ret\n\t"
+	"insn_sgdt: sgdt gdt_descr;ret\n\t"
+	"insn_sldt: sldt %ax;ret\n\t"
+	"insn_str: str %ax;ret\n\t"
+	"insn_ltr: ltr %ax;ret\n\t"
+	"insn_pushf: pushf;ret\n\t"
+	"insn_popf: popf;ret\n\t"
+	"insn_intn: int $0x22; vmmcall; ret\n\t"
+	"insn_int_handler: iretq\n\t"
+	"insn_stgi: stgi;ret\n\t"
+	"insn_clgi: clgi;ret\n\t"
+	"insn_rdtscp: rdtscp;ret\n\t"
+	"insn_wbinvd: wbinvd;ret\n\t"
+	"insn_lidt: lidt idt_descr;ret\n\t"
+	"insn_lgdt: lgdt gdt_descr;ret\n\t"
+	"insn_lldt: xor %eax, %eax; lldt %ax;ret\n\t"
+	"insn_rdpmc: xor %ecx, %ecx; rdpmc;ret\n\t"
+	"insn_cpuid: mov $10, %eax; cpuid;ret\n\t"
+	"insn_invd: invd;ret\n\t"
+	"insn_pause: pause;ret\n\t"
+	"insn_hlt: hlt;ret\n\t"
+	"insn_invlpg: invlpg 0x12345678;ret\n\t"
+	"insn_rdtsc: rdtsc;ret\n\t"
+	"insn_monitor: xor %eax, %eax; xor %ecx, %ecx; xor %edx, %edx; monitor;ret\n\t"
+	"insn_mwait: xor %eax, %eax; xor %ecx, %ecx; mwait;ret\n\t"
+	"insn_skinit: skinit;ret\n\t"
+	"insn_icebp: .byte 0xf1; ret\n\t"
+	"insn_xsetbv: mov $0, %ecx; xor %edx, %edx; xor %eax, %eax; xgetbv; xsetbv;ret\n\t"
+	"insn_rdpru: xor %ecx, %ecx; .byte 0x0f,0x01,0xfd;ret\n\t"
+);
+
+extern void insn_sidt(struct svm_test *test);
+extern void insn_sgdt(struct svm_test *test);
+extern void insn_sldt(struct svm_test *test);
+extern void insn_str(struct svm_test *test);
+extern void insn_ltr(struct svm_test *test);
+extern void insn_pushf(struct svm_test *test);
+extern void insn_popf(struct svm_test *test);
+extern void insn_intn(struct svm_test *test);
+extern void insn_int_handler(struct svm_test *test);
+extern void insn_stgi(struct svm_test *test);
+extern void insn_clgi(struct svm_test *test);
+extern void insn_rdtscp(struct svm_test *test);
+extern void insn_wbinvd(struct svm_test *test);
+extern void insn_lidt(struct svm_test *test);
+extern void insn_lgdt(struct svm_test *test);
+extern void insn_lldt(struct svm_test *test);
+extern void insn_rdpmc(struct svm_test *test);
+extern void insn_cpuid(struct svm_test *test);
+extern void insn_invd(struct svm_test *test);
+extern void insn_pause(struct svm_test *test);
+extern void insn_hlt(struct svm_test *test);
+extern void insn_invlpg(struct svm_test *test);
+extern void insn_rdtsc(struct svm_test *test);
+extern void insn_monitor(struct svm_test *test);
+extern void insn_mwait(struct svm_test *test);
+extern void insn_skinit(struct svm_test *test);
+extern void insn_icebp(struct svm_test *test);
+extern void insn_xsetbv(struct svm_test *test);
+extern void insn_rdpru(struct svm_test *test);

> Also this (but less importantly):
> https://lore.kernel.org/kvm/20260317225327.4068448-1-yosry@kernel.org/.

Because I hate bumping the timeouts.  It's a losing game of whack-a-mole.  For
now, it's easier to bury my head in the sand.