Searched hist:272195 (Results 1 - 4 of 4) sorted by relevance
| /freebsd-11.0-release/sys/amd64/vmm/amd/ | ||
| H A D | svm_genassym.c | diff 272195 Sat Sep 27 02:07:29 MDT 2014 neel Simplify register state save and restore across a VMRUN: - Host registers are now stored on the stack instead of a per-cpu host context. - Host %FS and %GS selectors are not saved and restored across VMRUN. - Restoring the %FS/%GS selectors was futile anyways since that only updates the low 32 bits of base address in the hidden descriptor state. - GS.base is properly updated via the MSR_GSBASE on return from svm_launch(). - FS.base is not used while inside the kernel so it can be safely ignored. - Add function prologue/epilogue so svm_launch() can be traced with Dtrace's FBT entry/exit probes. They also serve to save/restore the host %rbp across VMRUN. Reviewed by: grehan Discussed with: Anish Gupta (akgupt3@gmail.com) |
| H A D | svm.h | diff 272195 Sat Sep 27 02:07:29 MDT 2014 neel Simplify register state save and restore across a VMRUN: - Host registers are now stored on the stack instead of a per-cpu host context. - Host %FS and %GS selectors are not saved and restored across VMRUN. - Restoring the %FS/%GS selectors was futile anyways since that only updates the low 32 bits of base address in the hidden descriptor state. - GS.base is properly updated via the MSR_GSBASE on return from svm_launch(). - FS.base is not used while inside the kernel so it can be safely ignored. - Add function prologue/epilogue so svm_launch() can be traced with Dtrace's FBT entry/exit probes. They also serve to save/restore the host %rbp across VMRUN. Reviewed by: grehan Discussed with: Anish Gupta (akgupt3@gmail.com) |
| H A D | svm_support.S | diff 272195 Sat Sep 27 02:07:29 MDT 2014 neel Simplify register state save and restore across a VMRUN: - Host registers are now stored on the stack instead of a per-cpu host context. - Host %FS and %GS selectors are not saved and restored across VMRUN. - Restoring the %FS/%GS selectors was futile anyways since that only updates the low 32 bits of base address in the hidden descriptor state. - GS.base is properly updated via the MSR_GSBASE on return from svm_launch(). - FS.base is not used while inside the kernel so it can be safely ignored. - Add function prologue/epilogue so svm_launch() can be traced with Dtrace's FBT entry/exit probes. They also serve to save/restore the host %rbp across VMRUN. Reviewed by: grehan Discussed with: Anish Gupta (akgupt3@gmail.com) |
| H A D | svm.c | diff 272195 Sat Sep 27 02:07:29 MDT 2014 neel Simplify register state save and restore across a VMRUN: - Host registers are now stored on the stack instead of a per-cpu host context. - Host %FS and %GS selectors are not saved and restored across VMRUN. - Restoring the %FS/%GS selectors was futile anyways since that only updates the low 32 bits of base address in the hidden descriptor state. - GS.base is properly updated via the MSR_GSBASE on return from svm_launch(). - FS.base is not used while inside the kernel so it can be safely ignored. - Add function prologue/epilogue so svm_launch() can be traced with Dtrace's FBT entry/exit probes. They also serve to save/restore the host %rbp across VMRUN. Reviewed by: grehan Discussed with: Anish Gupta (akgupt3@gmail.com) |
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