> On 28. Apr 2026, at 15:50, Doru Blânzeanu <[email protected]>
> wrote:
>
> Update mshv_store_regs to use the register page when it is mmapped and
> valid to set registers.
> Otherwise use the ioctls to set the registers.
>
> Signed-off-by: Doru Blânzeanu <[email protected]>
Reviewed-by: Mohamed Mediouni <[email protected]>
> ---
> target/i386/mshv/mshv-cpu.c | 45 +++++++++++++++++++++++++++++++++----
> 1 file changed, 41 insertions(+), 4 deletions(-)
>
> diff --git a/target/i386/mshv/mshv-cpu.c b/target/i386/mshv/mshv-cpu.c
> index 7949493e97..6bb3e6d4a9 100644
> --- a/target/i386/mshv/mshv-cpu.c
> +++ b/target/i386/mshv/mshv-cpu.c
> @@ -294,14 +294,51 @@ static int set_standard_regs(const CPUState *cpu)
> return 0;
> }
>
> +static void mshv_set_standard_regs_vp_page(CPUState *cpu)
> +{
> + X86CPU *x86cpu = X86_CPU(cpu);
> + CPUX86State *env = &x86cpu->env;
> +
> + env->regs_page->rax = env->regs[R_EAX];
> + env->regs_page->rbx = env->regs[R_EBX];
> + env->regs_page->rcx = env->regs[R_ECX];
> + env->regs_page->rdx = env->regs[R_EDX];
> + env->regs_page->rsi = env->regs[R_ESI];
> + env->regs_page->rdi = env->regs[R_EDI];
> + env->regs_page->rsp = env->regs[R_ESP];
> + env->regs_page->rbp = env->regs[R_EBP];
> + env->regs_page->r8 = env->regs[R_R8];
> + env->regs_page->r9 = env->regs[R_R9];
> + env->regs_page->r10 = env->regs[R_R10];
> + env->regs_page->r11 = env->regs[R_R11];
> + env->regs_page->r12 = env->regs[R_R12];
> + env->regs_page->r13 = env->regs[R_R13];
> + env->regs_page->r14 = env->regs[R_R14];
> + env->regs_page->r15 = env->regs[R_R15];
> + env->regs_page->rip = env->eip;
> + lflags_to_rflags(env);
> + env->regs_page->rflags = env->eflags;
> +
> + env->regs_page->dirty |= (1u << HV_X64_REGISTER_CLASS_GENERAL)
> + | (1u << HV_X64_REGISTER_CLASS_IP)
> + | (1u << HV_X64_REGISTER_CLASS_FLAGS);
> +}
> +
> int mshv_store_regs(CPUState *cpu)
> {
> + X86CPU *x86cpu = X86_CPU(cpu);
> + CPUX86State *env = &x86cpu->env;
> int ret;
>
> - ret = set_standard_regs(cpu);
> - if (ret < 0) {
> - error_report("Failed to store standard registers");
> - return -1;
> + /* Use register vp page to optimize registers access */
> + if (env->regs_page && env->regs_page->isvalid != 0) {
> + mshv_set_standard_regs_vp_page(cpu);
> + } else {
> + ret = set_standard_regs(cpu);
> + if (ret < 0) {
> + error_report("Failed to store standard registers");
> + return -1;
> + }
> }
>
> return 0;
> --
> 2.53.0
>
>
