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...a day away. This completes = the proof of concept, I believe ;) I didn't cc LKML since I didn't want to spam them with graphics. Very = controversial graphics. Hopefully you appreciate the humor. Zach -------------- next part -------------- A non-text attachment was scrubbed... Name: parvirt-ops-success.jpg Type: image/jpeg Size: 125274 bytes Desc: not available Url : http://lists.linux-foundation.org/pipermail/virtualization/attachment= s/20060824/1a2e5bc0/parvirt-ops-success-0001.jpg

I'm experimenting with using WinXP Xen guests as an alternative to upgrading workstations. The administrative advantages seem overwhelming. Please share thoughts about using VNC vs RDP for remote desktop connections. Please share any anecdotal information regarding user reactions and/or implementation issues.

...RN was just "iret" for the non-paravirt case. This is the reason for above dropping of the static patch data. > So we want to change the above to also patch iret on x86_64 or do we > need to fix x86_64 to not have pv-iret? We want it to stay how it is. This will let both variants (PARVIRT y/n) continue to work. Juergen

On Fri, Aug 07, 2020 at 10:38:23AM +0200, Juergen Gross wrote: > -# else > - const unsigned char cpu_iret[1]; > -# endif > }; > > static const struct patch_xxl patch_data_xxl = { > @@ -42,7 +38,6 @@ static const struct patch_xxl patch_data_xxl = { > .irq_save_fl = { 0x9c, 0x58 }, // pushf; pop %[re]ax > .mmu_read_cr2 = { 0x0f, 0x20, 0xd0 }, // mov %cr2,

On Fri, Aug 07, 2020 at 10:38:23AM +0200, Juergen Gross wrote: > -# else > - const unsigned char cpu_iret[1]; > -# endif > }; > > static const struct patch_xxl patch_data_xxl = { > @@ -42,7 +38,6 @@ static const struct patch_xxl patch_data_xxl = { > .irq_save_fl = { 0x9c, 0x58 }, // pushf; pop %[re]ax > .mmu_read_cr2 = { 0x0f, 0x20, 0xd0 }, // mov %cr2,

I've updated the patches at http://ozlabs.org/~rusty/paravirt/?mf=33ba6c4fce13;path=/ to carve out the basic shape of how I see all this fitting together. These patches implement an initial set of Xen paravirt ops, as well as adapting head.S to set up a Xen-specific entrypoint. The head.S code does absolutely minimal setup, and then calls xen_start_kernel(). This installs the Xen