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SubjectRe: system locks up with CONFIG_SLS=Y; 5.17.0-rc
On Wed, Mar 16, 2022 at 06:45:25PM +0000, Jamie Heilman wrote:
> Yep that worked, here's output, you can see the network get set up and
> then boom:

Thx, that was very useful. Does this below fix it, per chance:

---
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index f667bd8df533..e88ce4171c4a 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -430,8 +430,11 @@ static int fastop(struct x86_emulate_ctxt *ctxt, fastop_t fop);
FOP_END

/* Special case for SETcc - 1 instruction per cc */
+
+#define SETCC_ALIGN 8
+
#define FOP_SETCC(op) \
- ".align 4 \n\t" \
+ ".align " __stringify(SETCC_ALIGN) " \n\t" \
".type " #op ", @function \n\t" \
#op ": \n\t" \
ASM_ENDBR \
@@ -1049,7 +1052,7 @@ static int em_bsr_c(struct x86_emulate_ctxt *ctxt)
static __always_inline u8 test_cc(unsigned int condition, unsigned long flags)
{
u8 rc;
- void (*fop)(void) = (void *)em_setcc + 4 * (condition & 0xf);
+ void (*fop)(void) = (void *)em_setcc + SETCC_ALIGN * (condition & 0xf);

flags = (flags & EFLAGS_MASK) | X86_EFLAGS_IF;
asm("push %[flags]; popf; " CALL_NOSPEC
--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette

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