On 25.04.25 14:33, Peter Zijlstra wrote:
On Wed, Apr 23, 2025 at 06:05:19PM +0200, Jürgen Groß wrote:It's not a major change, but when it is patched to use the immediate form MSR write instruction, it's straightforwardly streamlined.It should be rather easy to switch the current wrmsr/rdmsr paravirt patching locations to use the rdmsr/wrmsr instructions instead of doing a call to native_*msr().Right, just make the Xen functions asm stubs that expect the instruction registers instead of C-abi and ALT_NOT_XEN the thing. Shouldn't be hard at all.
Correct. And for the new immediate form we can use ALTERNATIVE_3(). Juergen
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